Hello,
syzbot found the following issue on:
HEAD commit: b3603fcb79b1 Merge tag 'dlm-6.9' of git://git.kernel.org/p..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10f04c81180000
kernel config: https://syzkaller.appspot.com/x/.config?x=fcb5bfbee0a42b54
dashboard link: https://syzkaller.appspot.com/bug?extid=70f57d8a3ae84934c003
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/43969dffd4a6/disk-b3603fcb.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ef48ab3b378b/vmlinux-b3603fcb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/728f5ff2b6fe/bzImage-b3603fcb.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email protected]
Key type pkcs7_test registered
Block layer SCSI generic (bsg) driver version 0.4 loaded (major 239)
io scheduler mq-deadline registered
io scheduler kyber registered
io scheduler bfq registered
input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
ACPI: button: Power Button [PWRF]
input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
ACPI: button: Sleep Button [SLPF]
ioatdma: Intel(R) QuickData Technology Driver 5.00
ACPI: \_SB_.LNKC: Enabled at IRQ 11
virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
ACPI: \_SB_.LNKD: Enabled at IRQ 10
virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
ACPI: \_SB_.LNKB: Enabled at IRQ 10
virtio-pci 0000:00:06.0: virtio_pci: leaving for legacy driver
virtio-pci 0000:00:07.0: virtio_pci: leaving for legacy driver
N_HDLC line discipline registered with maxframe=4096
Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
00:03: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
00:04: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
00:05: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A
00:06: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A
Non-volatile memory driver v1.3
Linux agpgart interface v0.103
ACPI: bus type drm_connector registered
[drm] Initialized vgem 1.0.0 20120112 for vgem on minor 0
[drm] Initialized vkms 1.0.0 20180514 for vkms on minor 1
Console: switching to colour frame buffer device 128x48
platform vkms: [drm] fb0: vkmsdrmfb frame buffer device
usbcore: registered new interface driver udl
brd: module loaded
loop: module loaded
zram: Added device: zram0
null_blk: disk nullb0 created
null_blk: module loaded
Guest personality initialized and is inactive
VMCI host device registered (name=vmci, major=10, minor=118)
Initialized host personality
usbcore: registered new interface driver rtsx_usb
usbcore: registered new interface driver viperboard
usbcore: registered new interface driver dln2
usbcore: registered new interface driver pn533_usb
nfcsim 0.2 initialized
usbcore: registered new interface driver port100
usbcore: registered new interface driver nfcmrvl
Loading iSCSI transport class v2.0-870.
virtio_scsi virtio0: 1/0/0 default/read/poll queues
------------[ cut here ]------------
refcount_t: decrement hit 0; leaking memory.
WARNING: CPU: 0 PID: 1 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.8.0-syzkaller-11567-gb3603fcb79b1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31
Code: b2 00 00 00 e8 57 d4 f2 fc 5b 5d c3 cc cc cc cc e8 4b d4 f2 fc c6 05 0c f9 ef 0a 01 90 48 c7 c7 a0 5d 1e 8c e8 b7 75 b5 fc 90 <0f> 0b 90 90 eb d9 e8 2b d4 f2 fc c6 05 e9 f8 ef 0a 01 90 48 c7 c7
RSP: 0000:ffffc90000066e18 EFLAGS: 00010246
RAX: 76f86e452fcad900 RBX: ffff8880210d2aec RCX: ffff888016ac8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000004 R08: ffffffff8157ffe2 R09: fffffbfff1c396e0
R10: dffffc0000000000 R11: fffffbfff1c396e0 R12: ffffea000502cdc0
R13: ffffea000502cdc8 R14: 1ffffd4000a059b9 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88823ffff000 CR3: 000000000e132000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1141 [inline]
__free_pages_ok+0xc54/0xd80 mm/page_alloc.c:1270
make_alloc_exact+0xa3/0xf0 mm/page_alloc.c:4829
vring_alloc_queue drivers/virtio/virtio_ring.c:319 [inline]
vring_alloc_queue_split+0x20a/0x600 drivers/virtio/virtio_ring.c:1108
vring_create_virtqueue_split+0xc6/0x310 drivers/virtio/virtio_ring.c:1158
vring_create_virtqueue+0xca/0x110 drivers/virtio/virtio_ring.c:2683
setup_vq+0xe9/0x2d0 drivers/virtio/virtio_pci_legacy.c:131
vp_setup_vq+0xbf/0x330 drivers/virtio/virtio_pci_common.c:189
vp_find_vqs_msix+0x8b2/0xc80 drivers/virtio/virtio_pci_common.c:331
vp_find_vqs+0x4c/0x4e0 drivers/virtio/virtio_pci_common.c:408
virtio_find_vqs include/linux/virtio_config.h:233 [inline]
virtscsi_init+0x8db/0xd00 drivers/scsi/virtio_scsi.c:887
virtscsi_probe+0x3ea/0xf60 drivers/scsi/virtio_scsi.c:945
virtio_dev_probe+0x991/0xaf0 drivers/virtio/virtio.c:311
really_probe+0x29e/0xc50 drivers/base/dd.c:658
__driver_probe_device+0x1a2/0x3e0 drivers/base/dd.c:800
driver_probe_device+0x50/0x430 drivers/base/dd.c:830
__driver_attach+0x45f/0x710 drivers/base/dd.c:1216
bus_for_each_dev+0x239/0x2b0 drivers/base/bus.c:368
bus_add_driver+0x347/0x620 drivers/base/bus.c:673
driver_register+0x23a/0x320 drivers/base/driver.c:246
virtio_scsi_init+0x65/0xe0 drivers/scsi/virtio_scsi.c:1083
do_one_initcall+0x248/0x880 init/main.c:1238
do_initcall_level+0x157/0x210 init/main.c:1300
do_initcalls+0x3f/0x80 init/main.c:1316
kernel_init_freeable+0x435/0x5d0 init/main.c:1548
kernel_init+0x1d/0x2b0 init/main.c:1437
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
</TASK>
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at [email protected].
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
On Tue, Mar 19, 2024 at 12:32:26AM -0700, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: b3603fcb79b1 Merge tag 'dlm-6.9' of git://git.kernel.org/p..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=10f04c81180000
> kernel config: https://syzkaller.appspot.com/x/.config?x=fcb5bfbee0a42b54
> dashboard link: https://syzkaller.appspot.com/bug?extid=70f57d8a3ae84934c003
> compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
>
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/43969dffd4a6/disk-b3603fcb.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/ef48ab3b378b/vmlinux-b3603fcb.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/728f5ff2b6fe/bzImage-b3603fcb.xz
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: [email protected]
>
> Key type pkcs7_test registered
> Block layer SCSI generic (bsg) driver version 0.4 loaded (major 239)
> io scheduler mq-deadline registered
> io scheduler kyber registered
> io scheduler bfq registered
> input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
> ACPI: button: Power Button [PWRF]
> input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
> ACPI: button: Sleep Button [SLPF]
> ioatdma: Intel(R) QuickData Technology Driver 5.00
> ACPI: \_SB_.LNKC: Enabled at IRQ 11
> virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
> ACPI: \_SB_.LNKD: Enabled at IRQ 10
> virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
> ACPI: \_SB_.LNKB: Enabled at IRQ 10
> virtio-pci 0000:00:06.0: virtio_pci: leaving for legacy driver
> virtio-pci 0000:00:07.0: virtio_pci: leaving for legacy driver
> N_HDLC line discipline registered with maxframe=4096
> Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
> 00:03: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
> 00:04: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
> 00:05: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A
> 00:06: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A
> Non-volatile memory driver v1.3
> Linux agpgart interface v0.103
> ACPI: bus type drm_connector registered
> [drm] Initialized vgem 1.0.0 20120112 for vgem on minor 0
> [drm] Initialized vkms 1.0.0 20180514 for vkms on minor 1
> Console: switching to colour frame buffer device 128x48
> platform vkms: [drm] fb0: vkmsdrmfb frame buffer device
> usbcore: registered new interface driver udl
> brd: module loaded
> loop: module loaded
> zram: Added device: zram0
> null_blk: disk nullb0 created
> null_blk: module loaded
> Guest personality initialized and is inactive
> VMCI host device registered (name=vmci, major=10, minor=118)
> Initialized host personality
> usbcore: registered new interface driver rtsx_usb
> usbcore: registered new interface driver viperboard
> usbcore: registered new interface driver dln2
> usbcore: registered new interface driver pn533_usb
> nfcsim 0.2 initialized
> usbcore: registered new interface driver port100
> usbcore: registered new interface driver nfcmrvl
> Loading iSCSI transport class v2.0-870.
> virtio_scsi virtio0: 1/0/0 default/read/poll queues
> ------------[ cut here ]------------
> refcount_t: decrement hit 0; leaking memory.
> WARNING: CPU: 0 PID: 1 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31
> Modules linked in:
> CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.8.0-syzkaller-11567-gb3603fcb79b1 #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
> RIP: 0010:refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31
> Code: b2 00 00 00 e8 57 d4 f2 fc 5b 5d c3 cc cc cc cc e8 4b d4 f2 fc c6 05 0c f9 ef 0a 01 90 48 c7 c7 a0 5d 1e 8c e8 b7 75 b5 fc 90 <0f> 0b 90 90 eb d9 e8 2b d4 f2 fc c6 05 e9 f8 ef 0a 01 90 48 c7 c7
> RSP: 0000:ffffc90000066e18 EFLAGS: 00010246
> RAX: 76f86e452fcad900 RBX: ffff8880210d2aec RCX: ffff888016ac8000
> RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
> RBP: 0000000000000004 R08: ffffffff8157ffe2 R09: fffffbfff1c396e0
> R10: dffffc0000000000 R11: fffffbfff1c396e0 R12: ffffea000502cdc0
> R13: ffffea000502cdc8 R14: 1ffffd4000a059b9 R15: 0000000000000000
> FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: ffff88823ffff000 CR3: 000000000e132000 CR4: 00000000003506f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
> <TASK>
> reset_page_owner include/linux/page_owner.h:25 [inline]
> free_pages_prepare mm/page_alloc.c:1141 [inline]
> __free_pages_ok+0xc54/0xd80 mm/page_alloc.c:1270
> make_alloc_exact+0xa3/0xf0 mm/page_alloc.c:4829
> vring_alloc_queue drivers/virtio/virtio_ring.c:319 [inline]
> vring_alloc_queue_split+0x20a/0x600 drivers/virtio/virtio_ring.c:1108
> vring_create_virtqueue_split+0xc6/0x310 drivers/virtio/virtio_ring.c:1158
> vring_create_virtqueue+0xca/0x110 drivers/virtio/virtio_ring.c:2683
> setup_vq+0xe9/0x2d0 drivers/virtio/virtio_pci_legacy.c:131
> vp_setup_vq+0xbf/0x330 drivers/virtio/virtio_pci_common.c:189
> vp_find_vqs_msix+0x8b2/0xc80 drivers/virtio/virtio_pci_common.c:331
> vp_find_vqs+0x4c/0x4e0 drivers/virtio/virtio_pci_common.c:408
> virtio_find_vqs include/linux/virtio_config.h:233 [inline]
> virtscsi_init+0x8db/0xd00 drivers/scsi/virtio_scsi.c:887
> virtscsi_probe+0x3ea/0xf60 drivers/scsi/virtio_scsi.c:945
> virtio_dev_probe+0x991/0xaf0 drivers/virtio/virtio.c:311
> really_probe+0x29e/0xc50 drivers/base/dd.c:658
> __driver_probe_device+0x1a2/0x3e0 drivers/base/dd.c:800
> driver_probe_device+0x50/0x430 drivers/base/dd.c:830
> __driver_attach+0x45f/0x710 drivers/base/dd.c:1216
> bus_for_each_dev+0x239/0x2b0 drivers/base/bus.c:368
> bus_add_driver+0x347/0x620 drivers/base/bus.c:673
> driver_register+0x23a/0x320 drivers/base/driver.c:246
> virtio_scsi_init+0x65/0xe0 drivers/scsi/virtio_scsi.c:1083
> do_one_initcall+0x248/0x880 init/main.c:1238
> do_initcall_level+0x157/0x210 init/main.c:1300
> do_initcalls+0x3f/0x80 init/main.c:1316
> kernel_init_freeable+0x435/0x5d0 init/main.c:1548
> kernel_init+0x1d/0x2b0 init/main.c:1437
> ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
> ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
> </TASK>
>
I think I saw this already and also with virtio scsi. virtio
core does not seem to be doing anything special here,
Cc virtio scsi maintainers.
> ---
> This report is generated by a bot. It may contain errors.
> See https://goo.gl/tpsmEJ for more information about syzbot.
> syzbot engineers can be reached at [email protected].
>
> syzbot will keep track of this issue. See:
> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
>
> If the report is already addressed, let syzbot know by replying with:
> #syz fix: exact-commit-title
>
> If you want to overwrite report's subsystems, reply with:
> #syz set subsystems: new-subsystem
> (See the list of subsystem names on the web dashboard)
>
> If the report is a duplicate of another one, reply with:
> #syz dup: exact-subject-of-another-report
>
> If you want to undo deduplication, reply with:
> #syz undup
On Tue, Mar 19, 2024 at 03:40:53AM -0400, Michael S. Tsirkin wrote:
> On Tue, Mar 19, 2024 at 12:32:26AM -0700, syzbot wrote:
> > Hello,
> >
> > syzbot found the following issue on:
> >
> > HEAD commit: b3603fcb79b1 Merge tag 'dlm-6.9' of git://git.kernel.org/p..
> > git tree: upstream
> > console output: https://syzkaller.appspot.com/x/log.txt?x=10f04c81180000
> > kernel config: https://syzkaller.appspot.com/x/.config?x=fcb5bfbee0a42b54
> > dashboard link: https://syzkaller.appspot.com/bug?extid=70f57d8a3ae84934c003
> > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
> >
> > Downloadable assets:
> > disk image: https://storage.googleapis.com/syzbot-assets/43969dffd4a6/disk-b3603fcb.raw.xz
> > vmlinux: https://storage.googleapis.com/syzbot-assets/ef48ab3b378b/vmlinux-b3603fcb.xz
> > kernel image: https://storage.googleapis.com/syzbot-assets/728f5ff2b6fe/bzImage-b3603fcb.xz
> >
> > IMPORTANT: if you fix the issue, please add the following tag to the commit:
> > Reported-by: [email protected]
> >
> > Key type pkcs7_test registered
> > Block layer SCSI generic (bsg) driver version 0.4 loaded (major 239)
> > io scheduler mq-deadline registered
> > io scheduler kyber registered
> > io scheduler bfq registered
> > input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
> > ACPI: button: Power Button [PWRF]
> > input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
> > ACPI: button: Sleep Button [SLPF]
> > ioatdma: Intel(R) QuickData Technology Driver 5.00
> > ACPI: \_SB_.LNKC: Enabled at IRQ 11
> > virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
> > ACPI: \_SB_.LNKD: Enabled at IRQ 10
> > virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
> > ACPI: \_SB_.LNKB: Enabled at IRQ 10
> > virtio-pci 0000:00:06.0: virtio_pci: leaving for legacy driver
> > virtio-pci 0000:00:07.0: virtio_pci: leaving for legacy driver
> > N_HDLC line discipline registered with maxframe=4096
> > Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
> > 00:03: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
> > 00:04: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
> > 00:05: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A
> > 00:06: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A
> > Non-volatile memory driver v1.3
> > Linux agpgart interface v0.103
> > ACPI: bus type drm_connector registered
> > [drm] Initialized vgem 1.0.0 20120112 for vgem on minor 0
> > [drm] Initialized vkms 1.0.0 20180514 for vkms on minor 1
> > Console: switching to colour frame buffer device 128x48
> > platform vkms: [drm] fb0: vkmsdrmfb frame buffer device
> > usbcore: registered new interface driver udl
> > brd: module loaded
> > loop: module loaded
> > zram: Added device: zram0
> > null_blk: disk nullb0 created
> > null_blk: module loaded
> > Guest personality initialized and is inactive
> > VMCI host device registered (name=vmci, major=10, minor=118)
> > Initialized host personality
> > usbcore: registered new interface driver rtsx_usb
> > usbcore: registered new interface driver viperboard
> > usbcore: registered new interface driver dln2
> > usbcore: registered new interface driver pn533_usb
> > nfcsim 0.2 initialized
> > usbcore: registered new interface driver port100
> > usbcore: registered new interface driver nfcmrvl
> > Loading iSCSI transport class v2.0-870.
> > virtio_scsi virtio0: 1/0/0 default/read/poll queues
> > ------------[ cut here ]------------
> > refcount_t: decrement hit 0; leaking memory.
> > WARNING: CPU: 0 PID: 1 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31
> > Modules linked in:
> > CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.8.0-syzkaller-11567-gb3603fcb79b1 #0
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
> > RIP: 0010:refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31
> > Code: b2 00 00 00 e8 57 d4 f2 fc 5b 5d c3 cc cc cc cc e8 4b d4 f2 fc c6 05 0c f9 ef 0a 01 90 48 c7 c7 a0 5d 1e 8c e8 b7 75 b5 fc 90 <0f> 0b 90 90 eb d9 e8 2b d4 f2 fc c6 05 e9 f8 ef 0a 01 90 48 c7 c7
> > RSP: 0000:ffffc90000066e18 EFLAGS: 00010246
> > RAX: 76f86e452fcad900 RBX: ffff8880210d2aec RCX: ffff888016ac8000
> > RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
> > RBP: 0000000000000004 R08: ffffffff8157ffe2 R09: fffffbfff1c396e0
> > R10: dffffc0000000000 R11: fffffbfff1c396e0 R12: ffffea000502cdc0
> > R13: ffffea000502cdc8 R14: 1ffffd4000a059b9 R15: 0000000000000000
> > FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
> > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > CR2: ffff88823ffff000 CR3: 000000000e132000 CR4: 00000000003506f0
> > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> > Call Trace:
> > <TASK>
> > reset_page_owner include/linux/page_owner.h:25 [inline]
> > free_pages_prepare mm/page_alloc.c:1141 [inline]
> > __free_pages_ok+0xc54/0xd80 mm/page_alloc.c:1270
> > make_alloc_exact+0xa3/0xf0 mm/page_alloc.c:4829
> > vring_alloc_queue drivers/virtio/virtio_ring.c:319 [inline]
> > vring_alloc_queue_split+0x20a/0x600 drivers/virtio/virtio_ring.c:1108
> > vring_create_virtqueue_split+0xc6/0x310 drivers/virtio/virtio_ring.c:1158
> > vring_create_virtqueue+0xca/0x110 drivers/virtio/virtio_ring.c:2683
> > setup_vq+0xe9/0x2d0 drivers/virtio/virtio_pci_legacy.c:131
> > vp_setup_vq+0xbf/0x330 drivers/virtio/virtio_pci_common.c:189
> > vp_find_vqs_msix+0x8b2/0xc80 drivers/virtio/virtio_pci_common.c:331
> > vp_find_vqs+0x4c/0x4e0 drivers/virtio/virtio_pci_common.c:408
> > virtio_find_vqs include/linux/virtio_config.h:233 [inline]
> > virtscsi_init+0x8db/0xd00 drivers/scsi/virtio_scsi.c:887
> > virtscsi_probe+0x3ea/0xf60 drivers/scsi/virtio_scsi.c:945
> > virtio_dev_probe+0x991/0xaf0 drivers/virtio/virtio.c:311
> > really_probe+0x29e/0xc50 drivers/base/dd.c:658
> > __driver_probe_device+0x1a2/0x3e0 drivers/base/dd.c:800
> > driver_probe_device+0x50/0x430 drivers/base/dd.c:830
> > __driver_attach+0x45f/0x710 drivers/base/dd.c:1216
> > bus_for_each_dev+0x239/0x2b0 drivers/base/bus.c:368
> > bus_add_driver+0x347/0x620 drivers/base/bus.c:673
> > driver_register+0x23a/0x320 drivers/base/driver.c:246
> > virtio_scsi_init+0x65/0xe0 drivers/scsi/virtio_scsi.c:1083
> > do_one_initcall+0x248/0x880 init/main.c:1238
> > do_initcall_level+0x157/0x210 init/main.c:1300
> > do_initcalls+0x3f/0x80 init/main.c:1316
> > kernel_init_freeable+0x435/0x5d0 init/main.c:1548
> > kernel_init+0x1d/0x2b0 init/main.c:1437
> > ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
> > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
> > </TASK>
> >
>
> I think I saw this already and also with virtio scsi. virtio
> core does not seem to be doing anything special here,
> Cc virtio scsi maintainers.
The oldest commit that syzkaller found is a memory management pull
request:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/?id=e5eb28f6d1afebed4bb7d740a797d0390bd3a357
I can't reproduce the issue locally with QEMU 8.2.0 so I don't have a
way to bisect.
I reviewed the virtio_scsi.c git log and there have been few changes
over the last several months. I couldn't spot an issue in this patch,
but the most likely virtio-scsi commit is:
commit 95e7249691f082a5178d4d6f60fcdee91da458ab
Author: Mike Christie <[email protected]>
Date: Wed Dec 13 23:26:49 2023 -0600
scsi: virtio_scsi: Add mq_poll support
Stefan
>
>
> > ---
> > This report is generated by a bot. It may contain errors.
> > See https://goo.gl/tpsmEJ for more information about syzbot.
> > syzbot engineers can be reached at [email protected].
> >
> > syzbot will keep track of this issue. See:
> > https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
> >
> > If the report is already addressed, let syzbot know by replying with:
> > #syz fix: exact-commit-title
> >
> > If you want to overwrite report's subsystems, reply with:
> > #syz set subsystems: new-subsystem
> > (See the list of subsystem names on the web dashboard)
> >
> > If the report is a duplicate of another one, reply with:
> > #syz dup: exact-subject-of-another-report
> >
> > If you want to undo deduplication, reply with:
> > #syz undup
>
On Tue, Mar 19, 2024 at 01:19:23PM -0400, Stefan Hajnoczi wrote:
> On Tue, Mar 19, 2024 at 03:40:53AM -0400, Michael S. Tsirkin wrote:
> > On Tue, Mar 19, 2024 at 12:32:26AM -0700, syzbot wrote:
> > > Hello,
> > >
> > > syzbot found the following issue on:
> > >
> > > HEAD commit: b3603fcb79b1 Merge tag 'dlm-6.9' of git://git.kernel.org/p..
> > > git tree: upstream
> > > console output: https://syzkaller.appspot.com/x/log.txt?x=10f04c81180000
> > > kernel config: https://syzkaller.appspot.com/x/.config?x=fcb5bfbee0a42b54
> > > dashboard link: https://syzkaller.appspot.com/bug?extid=70f57d8a3ae84934c003
> > > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
> > >
> > > Downloadable assets:
> > > disk image: https://storage.googleapis.com/syzbot-assets/43969dffd4a6/disk-b3603fcb.raw.xz
> > > vmlinux: https://storage.googleapis.com/syzbot-assets/ef48ab3b378b/vmlinux-b3603fcb.xz
> > > kernel image: https://storage.googleapis.com/syzbot-assets/728f5ff2b6fe/bzImage-b3603fcb.xz
> > >
> > > IMPORTANT: if you fix the issue, please add the following tag to the commit:
> > > Reported-by: [email protected]
> > >
> > > Key type pkcs7_test registered
> > > Block layer SCSI generic (bsg) driver version 0.4 loaded (major 239)
> > > io scheduler mq-deadline registered
> > > io scheduler kyber registered
> > > io scheduler bfq registered
> > > input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
> > > ACPI: button: Power Button [PWRF]
> > > input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
> > > ACPI: button: Sleep Button [SLPF]
> > > ioatdma: Intel(R) QuickData Technology Driver 5.00
> > > ACPI: \_SB_.LNKC: Enabled at IRQ 11
> > > virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
> > > ACPI: \_SB_.LNKD: Enabled at IRQ 10
> > > virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
> > > ACPI: \_SB_.LNKB: Enabled at IRQ 10
> > > virtio-pci 0000:00:06.0: virtio_pci: leaving for legacy driver
> > > virtio-pci 0000:00:07.0: virtio_pci: leaving for legacy driver
> > > N_HDLC line discipline registered with maxframe=4096
> > > Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
> > > 00:03: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
> > > 00:04: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
> > > 00:05: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A
> > > 00:06: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A
> > > Non-volatile memory driver v1.3
> > > Linux agpgart interface v0.103
> > > ACPI: bus type drm_connector registered
> > > [drm] Initialized vgem 1.0.0 20120112 for vgem on minor 0
> > > [drm] Initialized vkms 1.0.0 20180514 for vkms on minor 1
> > > Console: switching to colour frame buffer device 128x48
> > > platform vkms: [drm] fb0: vkmsdrmfb frame buffer device
> > > usbcore: registered new interface driver udl
> > > brd: module loaded
> > > loop: module loaded
> > > zram: Added device: zram0
> > > null_blk: disk nullb0 created
> > > null_blk: module loaded
> > > Guest personality initialized and is inactive
> > > VMCI host device registered (name=vmci, major=10, minor=118)
> > > Initialized host personality
> > > usbcore: registered new interface driver rtsx_usb
> > > usbcore: registered new interface driver viperboard
> > > usbcore: registered new interface driver dln2
> > > usbcore: registered new interface driver pn533_usb
> > > nfcsim 0.2 initialized
> > > usbcore: registered new interface driver port100
> > > usbcore: registered new interface driver nfcmrvl
> > > Loading iSCSI transport class v2.0-870.
> > > virtio_scsi virtio0: 1/0/0 default/read/poll queues
> > > ------------[ cut here ]------------
> > > refcount_t: decrement hit 0; leaking memory.
> > > WARNING: CPU: 0 PID: 1 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31
> > > Modules linked in:
> > > CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.8.0-syzkaller-11567-gb3603fcb79b1 #0
> > > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
> > > RIP: 0010:refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31
> > > Code: b2 00 00 00 e8 57 d4 f2 fc 5b 5d c3 cc cc cc cc e8 4b d4 f2 fc c6 05 0c f9 ef 0a 01 90 48 c7 c7 a0 5d 1e 8c e8 b7 75 b5 fc 90 <0f> 0b 90 90 eb d9 e8 2b d4 f2 fc c6 05 e9 f8 ef 0a 01 90 48 c7 c7
> > > RSP: 0000:ffffc90000066e18 EFLAGS: 00010246
> > > RAX: 76f86e452fcad900 RBX: ffff8880210d2aec RCX: ffff888016ac8000
> > > RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
> > > RBP: 0000000000000004 R08: ffffffff8157ffe2 R09: fffffbfff1c396e0
> > > R10: dffffc0000000000 R11: fffffbfff1c396e0 R12: ffffea000502cdc0
> > > R13: ffffea000502cdc8 R14: 1ffffd4000a059b9 R15: 0000000000000000
> > > FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
> > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > > CR2: ffff88823ffff000 CR3: 000000000e132000 CR4: 00000000003506f0
> > > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> > > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> > > Call Trace:
> > > <TASK>
> > > reset_page_owner include/linux/page_owner.h:25 [inline]
> > > free_pages_prepare mm/page_alloc.c:1141 [inline]
> > > __free_pages_ok+0xc54/0xd80 mm/page_alloc.c:1270
> > > make_alloc_exact+0xa3/0xf0 mm/page_alloc.c:4829
> > > vring_alloc_queue drivers/virtio/virtio_ring.c:319 [inline]
> > > vring_alloc_queue_split+0x20a/0x600 drivers/virtio/virtio_ring.c:1108
> > > vring_create_virtqueue_split+0xc6/0x310 drivers/virtio/virtio_ring.c:1158
> > > vring_create_virtqueue+0xca/0x110 drivers/virtio/virtio_ring.c:2683
> > > setup_vq+0xe9/0x2d0 drivers/virtio/virtio_pci_legacy.c:131
> > > vp_setup_vq+0xbf/0x330 drivers/virtio/virtio_pci_common.c:189
> > > vp_find_vqs_msix+0x8b2/0xc80 drivers/virtio/virtio_pci_common.c:331
> > > vp_find_vqs+0x4c/0x4e0 drivers/virtio/virtio_pci_common.c:408
> > > virtio_find_vqs include/linux/virtio_config.h:233 [inline]
> > > virtscsi_init+0x8db/0xd00 drivers/scsi/virtio_scsi.c:887
> > > virtscsi_probe+0x3ea/0xf60 drivers/scsi/virtio_scsi.c:945
> > > virtio_dev_probe+0x991/0xaf0 drivers/virtio/virtio.c:311
> > > really_probe+0x29e/0xc50 drivers/base/dd.c:658
> > > __driver_probe_device+0x1a2/0x3e0 drivers/base/dd.c:800
> > > driver_probe_device+0x50/0x430 drivers/base/dd.c:830
> > > __driver_attach+0x45f/0x710 drivers/base/dd.c:1216
> > > bus_for_each_dev+0x239/0x2b0 drivers/base/bus.c:368
> > > bus_add_driver+0x347/0x620 drivers/base/bus.c:673
> > > driver_register+0x23a/0x320 drivers/base/driver.c:246
> > > virtio_scsi_init+0x65/0xe0 drivers/scsi/virtio_scsi.c:1083
> > > do_one_initcall+0x248/0x880 init/main.c:1238
> > > do_initcall_level+0x157/0x210 init/main.c:1300
> > > do_initcalls+0x3f/0x80 init/main.c:1316
> > > kernel_init_freeable+0x435/0x5d0 init/main.c:1548
> > > kernel_init+0x1d/0x2b0 init/main.c:1437
> > > ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
> > > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
> > > </TASK>
> > >
> >
> > I think I saw this already and also with virtio scsi. virtio
> > core does not seem to be doing anything special here,
> > Cc virtio scsi maintainers.
>
> The oldest commit that syzkaller found is a memory management pull
> request:
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/?id=e5eb28f6d1afebed4bb7d740a797d0390bd3a357
>
> I can't reproduce the issue locally with QEMU 8.2.0 so I don't have a
> way to bisect.
>
> I reviewed the virtio_scsi.c git log and there have been few changes
> over the last several months. I couldn't spot an issue in this patch,
> but the most likely virtio-scsi commit is:
>
> commit 95e7249691f082a5178d4d6f60fcdee91da458ab
> Author: Mike Christie <[email protected]>
> Date: Wed Dec 13 23:26:49 2023 -0600
>
> scsi: virtio_scsi: Add mq_poll support
>
> Stefan
Send a revert and ask syzbot to test it then?
> >
> >
> > > ---
> > > This report is generated by a bot. It may contain errors.
> > > See https://goo.gl/tpsmEJ for more information about syzbot.
> > > syzbot engineers can be reached at [email protected].
> > >
> > > syzbot will keep track of this issue. See:
> > > https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
> > >
> > > If the report is already addressed, let syzbot know by replying with:
> > > #syz fix: exact-commit-title
> > >
> > > If you want to overwrite report's subsystems, reply with:
> > > #syz set subsystems: new-subsystem
> > > (See the list of subsystem names on the web dashboard)
> > >
> > > If the report is a duplicate of another one, reply with:
> > > #syz dup: exact-subject-of-another-report
> > >
> > > If you want to undo deduplication, reply with:
> > > #syz undup
> >
#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 52998cdd8d3438df9a77c858a827b8932da1bb28
This is the last time virtio_scsi.c was touched. If the test passes then
the issue is probably in another subsystem and we can bisect more recent
commits. If it fails, then older virtio_scsi.c commits need to be
bisected.
Stefan
On 3/19/24 12:19 PM, Stefan Hajnoczi wrote:
> On Tue, Mar 19, 2024 at 03:40:53AM -0400, Michael S. Tsirkin wrote:
>> On Tue, Mar 19, 2024 at 12:32:26AM -0700, syzbot wrote:
>>> Hello,
>>>
>>> syzbot found the following issue on:
>>>
>>> HEAD commit: b3603fcb79b1 Merge tag 'dlm-6.9' of git://git.kernel.org/p..
>>> git tree: upstream
>>> console output: https://syzkaller.appspot.com/x/log.txt?x=10f04c81180000
>>> kernel config: https://syzkaller.appspot.com/x/.config?x=fcb5bfbee0a42b54
>>> dashboard link: https://syzkaller.appspot.com/bug?extid=70f57d8a3ae84934c003
>>> compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
>>>
>>> Downloadable assets:
>>> disk image: https://storage.googleapis.com/syzbot-assets/43969dffd4a6/disk-b3603fcb.raw.xz
>>> vmlinux: https://storage.googleapis.com/syzbot-assets/ef48ab3b378b/vmlinux-b3603fcb.xz
>>> kernel image: https://storage.googleapis.com/syzbot-assets/728f5ff2b6fe/bzImage-b3603fcb.xz
>>>
>>> IMPORTANT: if you fix the issue, please add the following tag to the commit:
>>> Reported-by: [email protected]
>>>
>>> Key type pkcs7_test registered
>>> Block layer SCSI generic (bsg) driver version 0.4 loaded (major 239)
>>> io scheduler mq-deadline registered
>>> io scheduler kyber registered
>>> io scheduler bfq registered
>>> input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
>>> ACPI: button: Power Button [PWRF]
>>> input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
>>> ACPI: button: Sleep Button [SLPF]
>>> ioatdma: Intel(R) QuickData Technology Driver 5.00
>>> ACPI: \_SB_.LNKC: Enabled at IRQ 11
>>> virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
>>> ACPI: \_SB_.LNKD: Enabled at IRQ 10
>>> virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
>>> ACPI: \_SB_.LNKB: Enabled at IRQ 10
>>> virtio-pci 0000:00:06.0: virtio_pci: leaving for legacy driver
>>> virtio-pci 0000:00:07.0: virtio_pci: leaving for legacy driver
>>> N_HDLC line discipline registered with maxframe=4096
>>> Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
>>> 00:03: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
>>> 00:04: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
>>> 00:05: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A
>>> 00:06: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A
>>> Non-volatile memory driver v1.3
>>> Linux agpgart interface v0.103
>>> ACPI: bus type drm_connector registered
>>> [drm] Initialized vgem 1.0.0 20120112 for vgem on minor 0
>>> [drm] Initialized vkms 1.0.0 20180514 for vkms on minor 1
>>> Console: switching to colour frame buffer device 128x48
>>> platform vkms: [drm] fb0: vkmsdrmfb frame buffer device
>>> usbcore: registered new interface driver udl
>>> brd: module loaded
>>> loop: module loaded
>>> zram: Added device: zram0
>>> null_blk: disk nullb0 created
>>> null_blk: module loaded
>>> Guest personality initialized and is inactive
>>> VMCI host device registered (name=vmci, major=10, minor=118)
>>> Initialized host personality
>>> usbcore: registered new interface driver rtsx_usb
>>> usbcore: registered new interface driver viperboard
>>> usbcore: registered new interface driver dln2
>>> usbcore: registered new interface driver pn533_usb
>>> nfcsim 0.2 initialized
>>> usbcore: registered new interface driver port100
>>> usbcore: registered new interface driver nfcmrvl
>>> Loading iSCSI transport class v2.0-870.
>>> virtio_scsi virtio0: 1/0/0 default/read/poll queues
>>> ------------[ cut here ]------------
>>> refcount_t: decrement hit 0; leaking memory.
>>> WARNING: CPU: 0 PID: 1 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31
>>> Modules linked in:
>>> CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.8.0-syzkaller-11567-gb3603fcb79b1 #0
>>> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
>>> RIP: 0010:refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31
>>> Code: b2 00 00 00 e8 57 d4 f2 fc 5b 5d c3 cc cc cc cc e8 4b d4 f2 fc c6 05 0c f9 ef 0a 01 90 48 c7 c7 a0 5d 1e 8c e8 b7 75 b5 fc 90 <0f> 0b 90 90 eb d9 e8 2b d4 f2 fc c6 05 e9 f8 ef 0a 01 90 48 c7 c7
>>> RSP: 0000:ffffc90000066e18 EFLAGS: 00010246
>>> RAX: 76f86e452fcad900 RBX: ffff8880210d2aec RCX: ffff888016ac8000
>>> RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
>>> RBP: 0000000000000004 R08: ffffffff8157ffe2 R09: fffffbfff1c396e0
>>> R10: dffffc0000000000 R11: fffffbfff1c396e0 R12: ffffea000502cdc0
>>> R13: ffffea000502cdc8 R14: 1ffffd4000a059b9 R15: 0000000000000000
>>> FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
>>> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>>> CR2: ffff88823ffff000 CR3: 000000000e132000 CR4: 00000000003506f0
>>> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
>>> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
>>> Call Trace:
>>> <TASK>
>>> reset_page_owner include/linux/page_owner.h:25 [inline]
>>> free_pages_prepare mm/page_alloc.c:1141 [inline]
>>> __free_pages_ok+0xc54/0xd80 mm/page_alloc.c:1270
>>> make_alloc_exact+0xa3/0xf0 mm/page_alloc.c:4829
>>> vring_alloc_queue drivers/virtio/virtio_ring.c:319 [inline]
>>> vring_alloc_queue_split+0x20a/0x600 drivers/virtio/virtio_ring.c:1108
>>> vring_create_virtqueue_split+0xc6/0x310 drivers/virtio/virtio_ring.c:1158
>>> vring_create_virtqueue+0xca/0x110 drivers/virtio/virtio_ring.c:2683
>>> setup_vq+0xe9/0x2d0 drivers/virtio/virtio_pci_legacy.c:131
>>> vp_setup_vq+0xbf/0x330 drivers/virtio/virtio_pci_common.c:189
>>> vp_find_vqs_msix+0x8b2/0xc80 drivers/virtio/virtio_pci_common.c:331
>>> vp_find_vqs+0x4c/0x4e0 drivers/virtio/virtio_pci_common.c:408
>>> virtio_find_vqs include/linux/virtio_config.h:233 [inline]
>>> virtscsi_init+0x8db/0xd00 drivers/scsi/virtio_scsi.c:887
>>> virtscsi_probe+0x3ea/0xf60 drivers/scsi/virtio_scsi.c:945
>>> virtio_dev_probe+0x991/0xaf0 drivers/virtio/virtio.c:311
>>> really_probe+0x29e/0xc50 drivers/base/dd.c:658
>>> __driver_probe_device+0x1a2/0x3e0 drivers/base/dd.c:800
>>> driver_probe_device+0x50/0x430 drivers/base/dd.c:830
>>> __driver_attach+0x45f/0x710 drivers/base/dd.c:1216
>>> bus_for_each_dev+0x239/0x2b0 drivers/base/bus.c:368
>>> bus_add_driver+0x347/0x620 drivers/base/bus.c:673
>>> driver_register+0x23a/0x320 drivers/base/driver.c:246
>>> virtio_scsi_init+0x65/0xe0 drivers/scsi/virtio_scsi.c:1083
>>> do_one_initcall+0x248/0x880 init/main.c:1238
>>> do_initcall_level+0x157/0x210 init/main.c:1300
>>> do_initcalls+0x3f/0x80 init/main.c:1316
>>> kernel_init_freeable+0x435/0x5d0 init/main.c:1548
>>> kernel_init+0x1d/0x2b0 init/main.c:1437
>>> ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
>>> ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
>>> </TASK>
>>>
>>
>> I think I saw this already and also with virtio scsi. virtio
>> core does not seem to be doing anything special here,
>> Cc virtio scsi maintainers.
>
> The oldest commit that syzkaller found is a memory management pull
> request:
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/?id=e5eb28f6d1afebed4bb7d740a797d0390bd3a357
>
> I can't reproduce the issue locally with QEMU 8.2.0 so I don't have a
> way to bisect.
>
> I reviewed the virtio_scsi.c git log and there have been few changes
> over the last several months. I couldn't spot an issue in this patch,
> but the most likely virtio-scsi commit is:
>
> commit 95e7249691f082a5178d4d6f60fcdee91da458ab
> Author: Mike Christie <[email protected]>
> Date: Wed Dec 13 23:26:49 2023 -0600
>
> scsi: virtio_scsi: Add mq_poll support
>
> Stefan
I also tested the current kernel and didn't hit it.
In this mail:
https://lore.kernel.org/all/[email protected]/
from this thread:
https://lore.kernel.org/all/[email protected]/T/
it looks like Oscar is saying he has a fix right?
Hello,
syzbot has tested the proposed patch and the reproducer did not trigger any issue:
Reported-and-tested-by: [email protected]
Tested on:
commit: 52998cdd Merge branch '6.8/scsi-staging' into 6.8/scsi..
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel config: https://syzkaller.appspot.com/x/.config?x=7b1f286a7e950707
dashboard link: https://syzkaller.appspot.com/bug?extid=70f57d8a3ae84934c003
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Note: no patches were applied.
Note: testing is done by a robot and is best-effort only.
On Tue, Mar 19, 2024 at 03:51:18PM -0500, Mike Christie wrote:
> On 3/19/24 12:19 PM, Stefan Hajnoczi wrote:
> > On Tue, Mar 19, 2024 at 03:40:53AM -0400, Michael S. Tsirkin wrote:
> >> On Tue, Mar 19, 2024 at 12:32:26AM -0700, syzbot wrote:
> >>> Hello,
> >>>
> >>> syzbot found the following issue on:
> >>>
> >>> HEAD commit: b3603fcb79b1 Merge tag 'dlm-6.9' of git://git.kernel.org/p..
> >>> git tree: upstream
> >>> console output: https://syzkaller.appspot.com/x/log.txt?x=10f04c81180000
> >>> kernel config: https://syzkaller.appspot.com/x/.config?x=fcb5bfbee0a42b54
> >>> dashboard link: https://syzkaller.appspot.com/bug?extid=70f57d8a3ae84934c003
> >>> compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
> >>>
> >>> Downloadable assets:
> >>> disk image: https://storage.googleapis.com/syzbot-assets/43969dffd4a6/disk-b3603fcb.raw.xz
> >>> vmlinux: https://storage.googleapis.com/syzbot-assets/ef48ab3b378b/vmlinux-b3603fcb.xz
> >>> kernel image: https://storage.googleapis.com/syzbot-assets/728f5ff2b6fe/bzImage-b3603fcb.xz
> >>>
> >>> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> >>> Reported-by: [email protected]
> >>>
> >>> Key type pkcs7_test registered
> >>> Block layer SCSI generic (bsg) driver version 0.4 loaded (major 239)
> >>> io scheduler mq-deadline registered
> >>> io scheduler kyber registered
> >>> io scheduler bfq registered
> >>> input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
> >>> ACPI: button: Power Button [PWRF]
> >>> input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
> >>> ACPI: button: Sleep Button [SLPF]
> >>> ioatdma: Intel(R) QuickData Technology Driver 5.00
> >>> ACPI: \_SB_.LNKC: Enabled at IRQ 11
> >>> virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
> >>> ACPI: \_SB_.LNKD: Enabled at IRQ 10
> >>> virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
> >>> ACPI: \_SB_.LNKB: Enabled at IRQ 10
> >>> virtio-pci 0000:00:06.0: virtio_pci: leaving for legacy driver
> >>> virtio-pci 0000:00:07.0: virtio_pci: leaving for legacy driver
> >>> N_HDLC line discipline registered with maxframe=4096
> >>> Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
> >>> 00:03: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
> >>> 00:04: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
> >>> 00:05: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A
> >>> 00:06: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A
> >>> Non-volatile memory driver v1.3
> >>> Linux agpgart interface v0.103
> >>> ACPI: bus type drm_connector registered
> >>> [drm] Initialized vgem 1.0.0 20120112 for vgem on minor 0
> >>> [drm] Initialized vkms 1.0.0 20180514 for vkms on minor 1
> >>> Console: switching to colour frame buffer device 128x48
> >>> platform vkms: [drm] fb0: vkmsdrmfb frame buffer device
> >>> usbcore: registered new interface driver udl
> >>> brd: module loaded
> >>> loop: module loaded
> >>> zram: Added device: zram0
> >>> null_blk: disk nullb0 created
> >>> null_blk: module loaded
> >>> Guest personality initialized and is inactive
> >>> VMCI host device registered (name=vmci, major=10, minor=118)
> >>> Initialized host personality
> >>> usbcore: registered new interface driver rtsx_usb
> >>> usbcore: registered new interface driver viperboard
> >>> usbcore: registered new interface driver dln2
> >>> usbcore: registered new interface driver pn533_usb
> >>> nfcsim 0.2 initialized
> >>> usbcore: registered new interface driver port100
> >>> usbcore: registered new interface driver nfcmrvl
> >>> Loading iSCSI transport class v2.0-870.
> >>> virtio_scsi virtio0: 1/0/0 default/read/poll queues
> >>> ------------[ cut here ]------------
> >>> refcount_t: decrement hit 0; leaking memory.
> >>> WARNING: CPU: 0 PID: 1 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31
> >>> Modules linked in:
> >>> CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.8.0-syzkaller-11567-gb3603fcb79b1 #0
> >>> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
> >>> RIP: 0010:refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31
> >>> Code: b2 00 00 00 e8 57 d4 f2 fc 5b 5d c3 cc cc cc cc e8 4b d4 f2 fc c6 05 0c f9 ef 0a 01 90 48 c7 c7 a0 5d 1e 8c e8 b7 75 b5 fc 90 <0f> 0b 90 90 eb d9 e8 2b d4 f2 fc c6 05 e9 f8 ef 0a 01 90 48 c7 c7
> >>> RSP: 0000:ffffc90000066e18 EFLAGS: 00010246
> >>> RAX: 76f86e452fcad900 RBX: ffff8880210d2aec RCX: ffff888016ac8000
> >>> RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
> >>> RBP: 0000000000000004 R08: ffffffff8157ffe2 R09: fffffbfff1c396e0
> >>> R10: dffffc0000000000 R11: fffffbfff1c396e0 R12: ffffea000502cdc0
> >>> R13: ffffea000502cdc8 R14: 1ffffd4000a059b9 R15: 0000000000000000
> >>> FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
> >>> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> >>> CR2: ffff88823ffff000 CR3: 000000000e132000 CR4: 00000000003506f0
> >>> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> >>> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> >>> Call Trace:
> >>> <TASK>
> >>> reset_page_owner include/linux/page_owner.h:25 [inline]
> >>> free_pages_prepare mm/page_alloc.c:1141 [inline]
> >>> __free_pages_ok+0xc54/0xd80 mm/page_alloc.c:1270
> >>> make_alloc_exact+0xa3/0xf0 mm/page_alloc.c:4829
> >>> vring_alloc_queue drivers/virtio/virtio_ring.c:319 [inline]
> >>> vring_alloc_queue_split+0x20a/0x600 drivers/virtio/virtio_ring.c:1108
> >>> vring_create_virtqueue_split+0xc6/0x310 drivers/virtio/virtio_ring.c:1158
> >>> vring_create_virtqueue+0xca/0x110 drivers/virtio/virtio_ring.c:2683
> >>> setup_vq+0xe9/0x2d0 drivers/virtio/virtio_pci_legacy.c:131
> >>> vp_setup_vq+0xbf/0x330 drivers/virtio/virtio_pci_common.c:189
> >>> vp_find_vqs_msix+0x8b2/0xc80 drivers/virtio/virtio_pci_common.c:331
> >>> vp_find_vqs+0x4c/0x4e0 drivers/virtio/virtio_pci_common.c:408
> >>> virtio_find_vqs include/linux/virtio_config.h:233 [inline]
> >>> virtscsi_init+0x8db/0xd00 drivers/scsi/virtio_scsi.c:887
> >>> virtscsi_probe+0x3ea/0xf60 drivers/scsi/virtio_scsi.c:945
> >>> virtio_dev_probe+0x991/0xaf0 drivers/virtio/virtio.c:311
> >>> really_probe+0x29e/0xc50 drivers/base/dd.c:658
> >>> __driver_probe_device+0x1a2/0x3e0 drivers/base/dd.c:800
> >>> driver_probe_device+0x50/0x430 drivers/base/dd.c:830
> >>> __driver_attach+0x45f/0x710 drivers/base/dd.c:1216
> >>> bus_for_each_dev+0x239/0x2b0 drivers/base/bus.c:368
> >>> bus_add_driver+0x347/0x620 drivers/base/bus.c:673
> >>> driver_register+0x23a/0x320 drivers/base/driver.c:246
> >>> virtio_scsi_init+0x65/0xe0 drivers/scsi/virtio_scsi.c:1083
> >>> do_one_initcall+0x248/0x880 init/main.c:1238
> >>> do_initcall_level+0x157/0x210 init/main.c:1300
> >>> do_initcalls+0x3f/0x80 init/main.c:1316
> >>> kernel_init_freeable+0x435/0x5d0 init/main.c:1548
> >>> kernel_init+0x1d/0x2b0 init/main.c:1437
> >>> ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
> >>> ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
> >>> </TASK>
> >>>
> >>
> >> I think I saw this already and also with virtio scsi. virtio
> >> core does not seem to be doing anything special here,
> >> Cc virtio scsi maintainers.
> >
> > The oldest commit that syzkaller found is a memory management pull
> > request:
> > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/?id=e5eb28f6d1afebed4bb7d740a797d0390bd3a357
> >
> > I can't reproduce the issue locally with QEMU 8.2.0 so I don't have a
> > way to bisect.
> >
> > I reviewed the virtio_scsi.c git log and there have been few changes
> > over the last several months. I couldn't spot an issue in this patch,
> > but the most likely virtio-scsi commit is:
> >
> > commit 95e7249691f082a5178d4d6f60fcdee91da458ab
> > Author: Mike Christie <[email protected]>
> > Date: Wed Dec 13 23:26:49 2023 -0600
> >
> > scsi: virtio_scsi: Add mq_poll support
> >
> > Stefan
>
> I also tested the current kernel and didn't hit it.
>
> In this mail:
>
> https://lore.kernel.org/all/[email protected]/
>
> from this thread:
>
> https://lore.kernel.org/all/[email protected]/T/
>
> it looks like Oscar is saying he has a fix right?
Yes, here is Oscar's work-in-progress fix:
https://lore.kernel.org/all/[email protected]/
Commit 217b2119b9e2 ("mm,page_owner: implement the tracking of the
stacks count") introduced the issue and it was merged via commit
902861e34c40 ("Merge tag 'mm-stable-2024-03-13-20-04' of
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm").
To be 100% sure, I'll test the commit in question and its parent:
#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 4bedfb314bdd85c1662ecc46fa25b33b998f994d
#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 217b2119b9e260609958db413876f211038f00ee
Stefan
Hello,
syzbot has tested the proposed patch and the reproducer did not trigger any issue:
Reported-and-tested-by: [email protected]
Tested on:
commit: 4bedfb31 mm,page_owner: maintain own list of stack_rec..
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel config: https://syzkaller.appspot.com/x/.config?x=527195e149aa3091
dashboard link: https://syzkaller.appspot.com/bug?extid=70f57d8a3ae84934c003
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Note: no patches were applied.
Note: testing is done by a robot and is best-effort only.
On Wed, Mar 20, 2024 at 01:08:02PM -0700, syzbot wrote:
> Hello,
>
> syzbot has tested the proposed patch and the reproducer did not trigger any issue:
>
> Reported-and-tested-by: [email protected]
>
> Tested on:
>
> commit: 4bedfb31 mm,page_owner: maintain own list of stack_rec..
> git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> kernel config: https://syzkaller.appspot.com/x/.config?x=527195e149aa3091
> dashboard link: https://syzkaller.appspot.com/bug?extid=70f57d8a3ae84934c003
> compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
>
> Note: no patches were applied.
> Note: testing is done by a robot and is best-effort only.
>
Good, that was the expected last working commit. Here is the next commit
(it should fail):
#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 217b2119b9e260609958db413876f211038f00ee
Hello,
syzbot tried to test the proposed patch but the build/boot failed:
bcore: registered new interface driver viperboard
[ 7.297712][ T1] usbcore: registered new interface driver dln2
[ 7.299149][ T1] usbcore: registered new interface driver pn533_usb
[ 7.304759][ T924] kworker/u4:1 (924) used greatest stack depth: 22768 bytes left
[ 7.308971][ T1] nfcsim 0.2 initialized
[ 7.310068][ T1] usbcore: registered new interface driver port100
[ 7.311312][ T1] usbcore: registered new interface driver nfcmrvl
[ 7.318405][ T1] Loading iSCSI transport class v2.0-870.
[ 7.334687][ T1] virtio_scsi virtio0: 1/0/0 default/read/poll queues
[ 7.344927][ T1] ------------[ cut here ]------------
[ 7.345739][ T1] refcount_t: decrement hit 0; leaking memory.
[ 7.346982][ T1] WARNING: CPU: 0 PID: 1 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0
[ 7.348761][ T1] Modules linked in:
[ 7.349418][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.8.0-rc5-syzkaller-00257-g217b2119b9e2 #0
[ 7.351070][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
[ 7.352824][ T1] RIP: 0010:refcount_warn_saturate+0xfa/0x1d0
[ 7.353979][ T1] Code: b2 00 00 00 e8 97 2d fc fc 5b 5d c3 cc cc cc cc e8 8b 2d fc fc c6 05 0d d9 d6 0a 01 90 48 c7 c7 a0 46 fd 8b e8 e7 2c c0 fc 90 <0f> 0b 90 90 eb d9 e8 6b 2d fc fc c6 05 ea d8 d6 0a 01 90 48 c7 c7
[ 7.358181][ T1] RSP: 0000:ffffc90000066e10 EFLAGS: 00010246
[ 7.360206][ T1] RAX: 67b097fa09053300 RBX: ffff88814073377c RCX: ffff8880166c0000
[ 7.362234][ T1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 7.363496][ T1] RBP: 0000000000000004 R08: ffffffff81589d62 R09: 1ffff9200000cd14
[ 7.365139][ T1] R10: dffffc0000000000 R11: fffff5200000cd15 R12: ffffea000501edc0
[ 7.366612][ T1] R13: ffffea000501edc8 R14: 1ffffd4000a03db9 R15: 0000000000000000
[ 7.368171][ T1] FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
[ 7.370111][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 7.371030][ T1] CR2: ffff88823ffff000 CR3: 000000000df34000 CR4: 00000000003506f0
[ 7.372121][ T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 7.373506][ T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 7.374889][ T1] Call Trace:
[ 7.375371][ T1] <TASK>
[ 7.375798][ T1] ? __warn+0x162/0x4b0
[ 7.376442][ T1] ? refcount_warn_saturate+0xfa/0x1d0
[ 7.377482][ T1] ? report_bug+0x2b3/0x500
[ 7.378161][ T1] ? refcount_warn_saturate+0xfa/0x1d0
[ 7.379268][ T1] ? handle_bug+0x3e/0x70
[ 7.379887][ T1] ? exc_invalid_op+0x1a/0x50
[ 7.380563][ T1] ? asm_exc_invalid_op+0x1a/0x20
[ 7.381253][ T1] ? __warn_printk+0x292/0x360
[ 7.381912][ T1] ? refcount_warn_saturate+0xfa/0x1d0
[ 7.382752][ T1] __free_pages_ok+0xc36/0xd60
[ 7.384180][ T1] make_alloc_exact+0xc4/0x140
[ 7.385037][ T1] vring_alloc_queue_split+0x20a/0x600
[ 7.386037][ T1] ? __pfx_vring_alloc_queue_split+0x10/0x10
[ 7.387029][ T1] ? vp_find_vqs+0x4c/0x4e0
[ 7.387719][ T1] ? virtscsi_probe+0x3ea/0xf60
[ 7.388408][ T1] ? virtio_dev_probe+0x991/0xaf0
[ 7.389665][ T1] ? really_probe+0x29e/0xc50
[ 7.390429][ T1] ? driver_probe_device+0x50/0x430
[ 7.391176][ T1] vring_create_virtqueue_split+0xc6/0x310
[ 7.392014][ T1] ? ret_from_fork+0x4b/0x80
[ 7.392800][ T1] ? __pfx_vring_create_virtqueue_split+0x10/0x10
[ 7.394115][ T1] vring_create_virtqueue+0xca/0x110
[ 7.395151][ T1] ? __pfx_vp_notify+0x10/0x10
[ 7.395888][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.396674][ T1] setup_vq+0xe9/0x2d0
[ 7.397283][ T1] ? __pfx_vp_notify+0x10/0x10
[ 7.397938][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.398806][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.399938][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.400951][ T1] vp_setup_vq+0xbf/0x330
[ 7.401889][ T1] ? __pfx_vp_config_changed+0x10/0x10
[ 7.403092][ T1] ? ioread16+0x2f/0x90
[ 7.403909][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.405136][ T1] vp_find_vqs_msix+0x8b2/0xc80
[ 7.405892][ T1] vp_find_vqs+0x4c/0x4e0
[ 7.406823][ T1] virtscsi_init+0x8db/0xd00
[ 7.407669][ T1] ? __pfx_virtscsi_init+0x10/0x10
[ 7.408413][ T1] ? __pfx_default_calc_sets+0x10/0x10
[ 7.409369][ T1] ? scsi_host_alloc+0xa57/0xea0
[ 7.410333][ T1] ? vp_get+0xfd/0x140
[ 7.410899][ T1] virtscsi_probe+0x3ea/0xf60
[ 7.411673][ T1] ? __pfx_virtscsi_probe+0x10/0x10
[ 7.412520][ T1] ? kernfs_add_one+0x159/0x8b0
[ 7.413222][ T1] ? virtio_no_restricted_mem_acc+0x9/0x10
[ 7.414081][ T1] ? virtio_features_ok+0x10c/0x270
[ 7.414875][ T1] virtio_dev_probe+0x991/0xaf0
[ 7.415574][ T1] ? __pfx_virtio_dev_probe+0x10/0x10
[ 7.416501][ T1] really_probe+0x29e/0xc50
[ 7.417330][ T1] __driver_probe_device+0x1a2/0x3e0
[ 7.418134][ T1] driver_probe_device+0x50/0x430
[ 7.418922][ T1] __driver_attach+0x45f/0x710
[ 7.419731][ T1] ? __pfx___driver_attach+0x10/0x10
[ 7.420653][ T1] bus_for_each_dev+0x239/0x2b0
[ 7.421541][ T1] ? __pfx___driver_attach+0x10/0x10
[ 7.422345][ T1] ? __pfx_bus_for_each_dev+0x10/0x10
[ 7.423094][ T1] ? do_raw_spin_unlock+0x13b/0x8b0
[ 7.423964][ T1] bus_add_driver+0x347/0x620
[ 7.424702][ T1] driver_register+0x23a/0x320
[ 7.425353][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
[ 7.426126][ T1] virtio_scsi_init+0x65/0xe0
[ 7.426855][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
[ 7.427617][ T1] do_one_initcall+0x238/0x830
[ 7.428285][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
[ 7.429095][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 7.430084][ T1] ? lockdep_hardirqs_on_prepare+0x43c/0x780
[ 7.431238][ T1] ? __pfx_parse_args+0x10/0x10
[ 7.431953][ T1] ? do_initcalls+0x1c/0x80
[ 7.432616][ T1] ? rcu_is_watching+0x15/0xb0
[ 7.433413][ T1] do_initcall_level+0x157/0x210
[ 7.434175][ T1] do_initcalls+0x3f/0x80
[ 7.434918][ T1] kernel_init_freeable+0x42f/0x5d0
[ 7.435664][ T1] ? __pfx_kernel_init_freeable+0x10/0x10
[ 7.436745][ T1] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[ 7.437747][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.438487][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.439268][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.439947][ T1] kernel_init+0x1d/0x2b0
[ 7.440600][ T1] ret_from_fork+0x4b/0x80
[ 7.441572][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.442531][ T1] ret_from_fork_asm+0x1b/0x30
[ 7.443322][ T1] </TASK>
[ 7.443865][ T1] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 7.444976][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.8.0-rc5-syzkaller-00257-g217b2119b9e2 #0
[ 7.446451][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
[ 7.447782][ T1] Call Trace:
[ 7.448300][ T1] <TASK>
[ 7.448752][ T1] dump_stack_lvl+0x1e7/0x2e0
[ 7.449206][ T1] ? __pfx_dump_stack_lvl+0x10/0x10
[ 7.449206][ T1] ? __pfx__printk+0x10/0x10
[ 7.449206][ T1] ? _printk+0xd5/0x120
[ 7.449206][ T1] ? vscnprintf+0x5d/0x90
[ 7.449206][ T1] panic+0x349/0x860
[ 7.449206][ T1] ? __warn+0x171/0x4b0
[ 7.449206][ T1] ? __pfx_panic+0x10/0x10
[ 7.449206][ T1] ? show_trace_log_lvl+0x4e4/0x520
[ 7.449206][ T1] ? ret_from_fork_asm+0x1b/0x30
[ 7.449206][ T1] __warn+0x31c/0x4b0
[ 7.449206][ T1] ? refcount_warn_saturate+0xfa/0x1d0
[ 7.449206][ T1] report_bug+0x2b3/0x500
[ 7.449206][ T1] ? refcount_warn_saturate+0xfa/0x1d0
[ 7.458645][ T1] handle_bug+0x3e/0x70
[ 7.458645][ T1] exc_invalid_op+0x1a/0x50
[ 7.458645][ T1] asm_exc_invalid_op+0x1a/0x20
[ 7.458645][ T1] RIP: 0010:refcount_warn_saturate+0xfa/0x1d0
[ 7.458645][ T1] Code: b2 00 00 00 e8 97 2d fc fc 5b 5d c3 cc cc cc cc e8 8b 2d fc fc c6 05 0d d9 d6 0a 01 90 48 c7 c7 a0 46 fd 8b e8 e7 2c c0 fc 90 <0f> 0b 90 90 eb d9 e8 6b 2d fc fc c6 05 ea d8 d6 0a 01 90 48 c7 c7
[ 7.458645][ T1] RSP: 0000:ffffc90000066e10 EFLAGS: 00010246
[ 7.458645][ T1] RAX: 67b097fa09053300 RBX: ffff88814073377c RCX: ffff8880166c0000
[ 7.458645][ T1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 7.468739][ T1] RBP: 0000000000000004 R08: ffffffff81589d62 R09: 1ffff9200000cd14
[ 7.468739][ T1] R10: dffffc0000000000 R11: fffff5200000cd15 R12: ffffea000501edc0
[ 7.468739][ T1] R13: ffffea000501edc8 R14: 1ffffd4000a03db9 R15: 0000000000000000
[ 7.468739][ T1] ? __warn_printk+0x292/0x360
[ 7.468739][ T1] __free_pages_ok+0xc36/0xd60
[ 7.468739][ T1] make_alloc_exact+0xc4/0x140
[ 7.468739][ T1] vring_alloc_queue_split+0x20a/0x600
[ 7.468739][ T1] ? __pfx_vring_alloc_queue_split+0x10/0x10
[ 7.468739][ T1] ? vp_find_vqs+0x4c/0x4e0
[ 7.468739][ T1] ? virtscsi_probe+0x3ea/0xf60
[ 7.478647][ T1] ? virtio_dev_probe+0x991/0xaf0
[ 7.478647][ T1] ? really_probe+0x29e/0xc50
[ 7.478647][ T1] ? driver_probe_device+0x50/0x430
[ 7.478647][ T1] vring_create_virtqueue_split+0xc6/0x310
[ 7.478647][ T1] ? ret_from_fork+0x4b/0x80
[ 7.478647][ T1] ? __pfx_vring_create_virtqueue_split+0x10/0x10
[ 7.478647][ T1] vring_create_virtqueue+0xca/0x110
[ 7.478647][ T1] ? __pfx_vp_notify+0x10/0x10
[ 7.478647][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.478647][ T1] setup_vq+0xe9/0x2d0
[ 7.478647][ T1] ? __pfx_vp_notify+0x10/0x10
[ 7.478647][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.488714][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.488714][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.488714][ T1] vp_setup_vq+0xbf/0x330
[ 7.488714][ T1] ? __pfx_vp_config_changed+0x10/0x10
[ 7.488714][ T1] ? ioread16+0x2f/0x90
[ 7.488714][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
[ 7.488714][ T1] vp_find_vqs_msix+0x8b2/0xc80
[ 7.488714][ T1] vp_find_vqs+0x4c/0x4e0
[ 7.488714][ T1] virtscsi_init+0x8db/0xd00
[ 7.488714][ T1] ? __pfx_virtscsi_init+0x10/0x10
[ 7.488714][ T1] ? __pfx_default_calc_sets+0x10/0x10
[ 7.498614][ T1] ? scsi_host_alloc+0xa57/0xea0
[ 7.498614][ T1] ? vp_get+0xfd/0x140
[ 7.498614][ T1] virtscsi_probe+0x3ea/0xf60
[ 7.498614][ T1] ? __pfx_virtscsi_probe+0x10/0x10
[ 7.498614][ T1] ? kernfs_add_one+0x159/0x8b0
[ 7.498614][ T1] ? virtio_no_restricted_mem_acc+0x9/0x10
[ 7.498614][ T1] ? virtio_features_ok+0x10c/0x270
[ 7.498614][ T1] virtio_dev_probe+0x991/0xaf0
[ 7.498614][ T1] ? __pfx_virtio_dev_probe+0x10/0x10
[ 7.498614][ T1] really_probe+0x29e/0xc50
[ 7.498614][ T1] __driver_probe_device+0x1a2/0x3e0
[ 7.508689][ T1] driver_probe_device+0x50/0x430
[ 7.508689][ T1] __driver_attach+0x45f/0x710
[ 7.508689][ T1] ? __pfx___driver_attach+0x10/0x10
[ 7.508689][ T1] bus_for_each_dev+0x239/0x2b0
[ 7.508689][ T1] ? __pfx___driver_attach+0x10/0x10
[ 7.508689][ T1] ? __pfx_bus_for_each_dev+0x10/0x10
[ 7.508689][ T1] ? do_raw_spin_unlock+0x13b/0x8b0
[ 7.508689][ T1] bus_add_driver+0x347/0x620
[ 7.508689][ T1] driver_register+0x23a/0x320
[ 7.508689][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
[ 7.508689][ T1] virtio_scsi_init+0x65/0xe0
[ 7.518645][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
[ 7.518645][ T1] do_one_initcall+0x238/0x830
[ 7.518645][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
[ 7.518645][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 7.518645][ T1] ? lockdep_hardirqs_on_prepare+0x43c/0x780
[ 7.518645][ T1] ? __pfx_parse_args+0x10/0x10
[ 7.518645][ T1] ? do_initcalls+0x1c/0x80
[ 7.518645][ T1] ? rcu_is_watching+0x15/0xb0
[ 7.518645][ T1] do_initcall_level+0x157/0x210
[ 7.518645][ T1] do_initcalls+0x3f/0x80
[ 7.518645][ T1] kernel_init_freeable+0x42f/0x5d0
[ 7.528806][ T1] ? __pfx_kernel_init_freeable+0x10/0x10
[ 7.528806][ T1] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
[ 7.528806][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.528806][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.528806][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.528806][ T1] kernel_init+0x1d/0x2b0
[ 7.528806][ T1] ret_from_fork+0x4b/0x80
[ 7.528806][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.528806][ T1] ret_from_fork_asm+0x1b/0x30
[ 7.528806][ T1] </TASK>
[ 7.528806][ T1] Kernel Offset: disabled
[ 7.528806][ T1] Rebooting in 86400 seconds..
syzkaller build log:
go env (err=<nil>)
GO111MODULE='auto'
GOARCH='amd64'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMODCACHE='/syzkaller/jobs/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.21.4'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='gcc'
CXX='g++'
CGO_ENABLED='1'
GOMOD='/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build2530895313=/tmp/go-build -gno-record-gcc-switches'
git status (err=<nil>)
HEAD detached at 6753db5cd
nothing to commit, working tree clean
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=6753db5cdc04330ec9d1a5116b890c19481d69b3 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240320-145051'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-fuzzer github.com/google/syzkaller/syz-fuzzer
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=6753db5cdc04330ec9d1a5116b890c19481d69b3 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240320-145051'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=6753db5cdc04330ec9d1a5116b890c19481d69b3 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240320-145051'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-stress github.com/google/syzkaller/tools/syz-stress
mkdir -p ./bin/linux_amd64
gcc -o ./bin/linux_amd64/syz-executor executor/executor.cc \
-m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"6753db5cdc04330ec9d1a5116b890c19481d69b3\"
Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=1254e231180000
Tested on:
commit: 217b2119 mm,page_owner: implement the tracking of the ..
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel config: https://syzkaller.appspot.com/x/.config?x=527195e149aa3091
dashboard link: https://syzkaller.appspot.com/bug?extid=70f57d8a3ae84934c003
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Note: no patches were applied.
On Thu, Mar 21, 2024 at 08:52:03AM -0700, syzbot wrote:
> Hello,
>
> syzbot tried to test the proposed patch but the build/boot failed:
>
> bcore: registered new interface driver viperboard
> [ 7.297712][ T1] usbcore: registered new interface driver dln2
> [ 7.299149][ T1] usbcore: registered new interface driver pn533_usb
> [ 7.304759][ T924] kworker/u4:1 (924) used greatest stack depth: 22768 bytes left
> [ 7.308971][ T1] nfcsim 0.2 initialized
> [ 7.310068][ T1] usbcore: registered new interface driver port100
> [ 7.311312][ T1] usbcore: registered new interface driver nfcmrvl
> [ 7.318405][ T1] Loading iSCSI transport class v2.0-870.
> [ 7.334687][ T1] virtio_scsi virtio0: 1/0/0 default/read/poll queues
> [ 7.344927][ T1] ------------[ cut here ]------------
> [ 7.345739][ T1] refcount_t: decrement hit 0; leaking memory.
This confirms that the following commit introduced this issue:
commit 217b2119b9e260609958db413876f211038f00ee
Author: Oscar Salvador <[email protected]>
Date: Thu Feb 15 22:59:04 2024 +0100
mm,page_owner: implement the tracking of the stacks count
Mike: thanks for pointing out the fix that Oscar is working on!
Oscar: Please add the syzbot trailer to the next revision of your
"[PATCH v2 0/2] page_owner: Refcount fixups" series so this issue can be
closed.
> [ 7.346982][ T1] WARNING: CPU: 0 PID: 1 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0
> [ 7.348761][ T1] Modules linked in:
> [ 7.349418][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.8.0-rc5-syzkaller-00257-g217b2119b9e2 #0
> [ 7.351070][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
> [ 7.352824][ T1] RIP: 0010:refcount_warn_saturate+0xfa/0x1d0
> [ 7.353979][ T1] Code: b2 00 00 00 e8 97 2d fc fc 5b 5d c3 cc cc cc cc e8 8b 2d fc fc c6 05 0d d9 d6 0a 01 90 48 c7 c7 a0 46 fd 8b e8 e7 2c c0 fc 90 <0f> 0b 90 90 eb d9 e8 6b 2d fc fc c6 05 ea d8 d6 0a 01 90 48 c7 c7
> [ 7.358181][ T1] RSP: 0000:ffffc90000066e10 EFLAGS: 00010246
> [ 7.360206][ T1] RAX: 67b097fa09053300 RBX: ffff88814073377c RCX: ffff8880166c0000
> [ 7.362234][ T1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
> [ 7.363496][ T1] RBP: 0000000000000004 R08: ffffffff81589d62 R09: 1ffff9200000cd14
> [ 7.365139][ T1] R10: dffffc0000000000 R11: fffff5200000cd15 R12: ffffea000501edc0
> [ 7.366612][ T1] R13: ffffea000501edc8 R14: 1ffffd4000a03db9 R15: 0000000000000000
> [ 7.368171][ T1] FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
> [ 7.370111][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 7.371030][ T1] CR2: ffff88823ffff000 CR3: 000000000df34000 CR4: 00000000003506f0
> [ 7.372121][ T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [ 7.373506][ T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> [ 7.374889][ T1] Call Trace:
> [ 7.375371][ T1] <TASK>
> [ 7.375798][ T1] ? __warn+0x162/0x4b0
> [ 7.376442][ T1] ? refcount_warn_saturate+0xfa/0x1d0
> [ 7.377482][ T1] ? report_bug+0x2b3/0x500
> [ 7.378161][ T1] ? refcount_warn_saturate+0xfa/0x1d0
> [ 7.379268][ T1] ? handle_bug+0x3e/0x70
> [ 7.379887][ T1] ? exc_invalid_op+0x1a/0x50
> [ 7.380563][ T1] ? asm_exc_invalid_op+0x1a/0x20
> [ 7.381253][ T1] ? __warn_printk+0x292/0x360
> [ 7.381912][ T1] ? refcount_warn_saturate+0xfa/0x1d0
> [ 7.382752][ T1] __free_pages_ok+0xc36/0xd60
> [ 7.384180][ T1] make_alloc_exact+0xc4/0x140
> [ 7.385037][ T1] vring_alloc_queue_split+0x20a/0x600
> [ 7.386037][ T1] ? __pfx_vring_alloc_queue_split+0x10/0x10
> [ 7.387029][ T1] ? vp_find_vqs+0x4c/0x4e0
> [ 7.387719][ T1] ? virtscsi_probe+0x3ea/0xf60
> [ 7.388408][ T1] ? virtio_dev_probe+0x991/0xaf0
> [ 7.389665][ T1] ? really_probe+0x29e/0xc50
> [ 7.390429][ T1] ? driver_probe_device+0x50/0x430
> [ 7.391176][ T1] vring_create_virtqueue_split+0xc6/0x310
> [ 7.392014][ T1] ? ret_from_fork+0x4b/0x80
> [ 7.392800][ T1] ? __pfx_vring_create_virtqueue_split+0x10/0x10
> [ 7.394115][ T1] vring_create_virtqueue+0xca/0x110
> [ 7.395151][ T1] ? __pfx_vp_notify+0x10/0x10
> [ 7.395888][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
> [ 7.396674][ T1] setup_vq+0xe9/0x2d0
> [ 7.397283][ T1] ? __pfx_vp_notify+0x10/0x10
> [ 7.397938][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
> [ 7.398806][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
> [ 7.399938][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
> [ 7.400951][ T1] vp_setup_vq+0xbf/0x330
> [ 7.401889][ T1] ? __pfx_vp_config_changed+0x10/0x10
> [ 7.403092][ T1] ? ioread16+0x2f/0x90
> [ 7.403909][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
> [ 7.405136][ T1] vp_find_vqs_msix+0x8b2/0xc80
> [ 7.405892][ T1] vp_find_vqs+0x4c/0x4e0
> [ 7.406823][ T1] virtscsi_init+0x8db/0xd00
> [ 7.407669][ T1] ? __pfx_virtscsi_init+0x10/0x10
> [ 7.408413][ T1] ? __pfx_default_calc_sets+0x10/0x10
> [ 7.409369][ T1] ? scsi_host_alloc+0xa57/0xea0
> [ 7.410333][ T1] ? vp_get+0xfd/0x140
> [ 7.410899][ T1] virtscsi_probe+0x3ea/0xf60
> [ 7.411673][ T1] ? __pfx_virtscsi_probe+0x10/0x10
> [ 7.412520][ T1] ? kernfs_add_one+0x159/0x8b0
> [ 7.413222][ T1] ? virtio_no_restricted_mem_acc+0x9/0x10
> [ 7.414081][ T1] ? virtio_features_ok+0x10c/0x270
> [ 7.414875][ T1] virtio_dev_probe+0x991/0xaf0
> [ 7.415574][ T1] ? __pfx_virtio_dev_probe+0x10/0x10
> [ 7.416501][ T1] really_probe+0x29e/0xc50
> [ 7.417330][ T1] __driver_probe_device+0x1a2/0x3e0
> [ 7.418134][ T1] driver_probe_device+0x50/0x430
> [ 7.418922][ T1] __driver_attach+0x45f/0x710
> [ 7.419731][ T1] ? __pfx___driver_attach+0x10/0x10
> [ 7.420653][ T1] bus_for_each_dev+0x239/0x2b0
> [ 7.421541][ T1] ? __pfx___driver_attach+0x10/0x10
> [ 7.422345][ T1] ? __pfx_bus_for_each_dev+0x10/0x10
> [ 7.423094][ T1] ? do_raw_spin_unlock+0x13b/0x8b0
> [ 7.423964][ T1] bus_add_driver+0x347/0x620
> [ 7.424702][ T1] driver_register+0x23a/0x320
> [ 7.425353][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
> [ 7.426126][ T1] virtio_scsi_init+0x65/0xe0
> [ 7.426855][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
> [ 7.427617][ T1] do_one_initcall+0x238/0x830
> [ 7.428285][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
> [ 7.429095][ T1] ? __pfx_do_one_initcall+0x10/0x10
> [ 7.430084][ T1] ? lockdep_hardirqs_on_prepare+0x43c/0x780
> [ 7.431238][ T1] ? __pfx_parse_args+0x10/0x10
> [ 7.431953][ T1] ? do_initcalls+0x1c/0x80
> [ 7.432616][ T1] ? rcu_is_watching+0x15/0xb0
> [ 7.433413][ T1] do_initcall_level+0x157/0x210
> [ 7.434175][ T1] do_initcalls+0x3f/0x80
> [ 7.434918][ T1] kernel_init_freeable+0x42f/0x5d0
> [ 7.435664][ T1] ? __pfx_kernel_init_freeable+0x10/0x10
> [ 7.436745][ T1] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
> [ 7.437747][ T1] ? __pfx_kernel_init+0x10/0x10
> [ 7.438487][ T1] ? __pfx_kernel_init+0x10/0x10
> [ 7.439268][ T1] ? __pfx_kernel_init+0x10/0x10
> [ 7.439947][ T1] kernel_init+0x1d/0x2b0
> [ 7.440600][ T1] ret_from_fork+0x4b/0x80
> [ 7.441572][ T1] ? __pfx_kernel_init+0x10/0x10
> [ 7.442531][ T1] ret_from_fork_asm+0x1b/0x30
> [ 7.443322][ T1] </TASK>
> [ 7.443865][ T1] Kernel panic - not syncing: kernel: panic_on_warn set ...
> [ 7.444976][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.8.0-rc5-syzkaller-00257-g217b2119b9e2 #0
> [ 7.446451][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
> [ 7.447782][ T1] Call Trace:
> [ 7.448300][ T1] <TASK>
> [ 7.448752][ T1] dump_stack_lvl+0x1e7/0x2e0
> [ 7.449206][ T1] ? __pfx_dump_stack_lvl+0x10/0x10
> [ 7.449206][ T1] ? __pfx__printk+0x10/0x10
> [ 7.449206][ T1] ? _printk+0xd5/0x120
> [ 7.449206][ T1] ? vscnprintf+0x5d/0x90
> [ 7.449206][ T1] panic+0x349/0x860
> [ 7.449206][ T1] ? __warn+0x171/0x4b0
> [ 7.449206][ T1] ? __pfx_panic+0x10/0x10
> [ 7.449206][ T1] ? show_trace_log_lvl+0x4e4/0x520
> [ 7.449206][ T1] ? ret_from_fork_asm+0x1b/0x30
> [ 7.449206][ T1] __warn+0x31c/0x4b0
> [ 7.449206][ T1] ? refcount_warn_saturate+0xfa/0x1d0
> [ 7.449206][ T1] report_bug+0x2b3/0x500
> [ 7.449206][ T1] ? refcount_warn_saturate+0xfa/0x1d0
> [ 7.458645][ T1] handle_bug+0x3e/0x70
> [ 7.458645][ T1] exc_invalid_op+0x1a/0x50
> [ 7.458645][ T1] asm_exc_invalid_op+0x1a/0x20
> [ 7.458645][ T1] RIP: 0010:refcount_warn_saturate+0xfa/0x1d0
> [ 7.458645][ T1] Code: b2 00 00 00 e8 97 2d fc fc 5b 5d c3 cc cc cc cc e8 8b 2d fc fc c6 05 0d d9 d6 0a 01 90 48 c7 c7 a0 46 fd 8b e8 e7 2c c0 fc 90 <0f> 0b 90 90 eb d9 e8 6b 2d fc fc c6 05 ea d8 d6 0a 01 90 48 c7 c7
> [ 7.458645][ T1] RSP: 0000:ffffc90000066e10 EFLAGS: 00010246
> [ 7.458645][ T1] RAX: 67b097fa09053300 RBX: ffff88814073377c RCX: ffff8880166c0000
> [ 7.458645][ T1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
> [ 7.468739][ T1] RBP: 0000000000000004 R08: ffffffff81589d62 R09: 1ffff9200000cd14
> [ 7.468739][ T1] R10: dffffc0000000000 R11: fffff5200000cd15 R12: ffffea000501edc0
> [ 7.468739][ T1] R13: ffffea000501edc8 R14: 1ffffd4000a03db9 R15: 0000000000000000
> [ 7.468739][ T1] ? __warn_printk+0x292/0x360
> [ 7.468739][ T1] __free_pages_ok+0xc36/0xd60
> [ 7.468739][ T1] make_alloc_exact+0xc4/0x140
> [ 7.468739][ T1] vring_alloc_queue_split+0x20a/0x600
> [ 7.468739][ T1] ? __pfx_vring_alloc_queue_split+0x10/0x10
> [ 7.468739][ T1] ? vp_find_vqs+0x4c/0x4e0
> [ 7.468739][ T1] ? virtscsi_probe+0x3ea/0xf60
> [ 7.478647][ T1] ? virtio_dev_probe+0x991/0xaf0
> [ 7.478647][ T1] ? really_probe+0x29e/0xc50
> [ 7.478647][ T1] ? driver_probe_device+0x50/0x430
> [ 7.478647][ T1] vring_create_virtqueue_split+0xc6/0x310
> [ 7.478647][ T1] ? ret_from_fork+0x4b/0x80
> [ 7.478647][ T1] ? __pfx_vring_create_virtqueue_split+0x10/0x10
> [ 7.478647][ T1] vring_create_virtqueue+0xca/0x110
> [ 7.478647][ T1] ? __pfx_vp_notify+0x10/0x10
> [ 7.478647][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
> [ 7.478647][ T1] setup_vq+0xe9/0x2d0
> [ 7.478647][ T1] ? __pfx_vp_notify+0x10/0x10
> [ 7.478647][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
> [ 7.488714][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
> [ 7.488714][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
> [ 7.488714][ T1] vp_setup_vq+0xbf/0x330
> [ 7.488714][ T1] ? __pfx_vp_config_changed+0x10/0x10
> [ 7.488714][ T1] ? ioread16+0x2f/0x90
> [ 7.488714][ T1] ? __pfx_virtscsi_ctrl_done+0x10/0x10
> [ 7.488714][ T1] vp_find_vqs_msix+0x8b2/0xc80
> [ 7.488714][ T1] vp_find_vqs+0x4c/0x4e0
> [ 7.488714][ T1] virtscsi_init+0x8db/0xd00
> [ 7.488714][ T1] ? __pfx_virtscsi_init+0x10/0x10
> [ 7.488714][ T1] ? __pfx_default_calc_sets+0x10/0x10
> [ 7.498614][ T1] ? scsi_host_alloc+0xa57/0xea0
> [ 7.498614][ T1] ? vp_get+0xfd/0x140
> [ 7.498614][ T1] virtscsi_probe+0x3ea/0xf60
> [ 7.498614][ T1] ? __pfx_virtscsi_probe+0x10/0x10
> [ 7.498614][ T1] ? kernfs_add_one+0x159/0x8b0
> [ 7.498614][ T1] ? virtio_no_restricted_mem_acc+0x9/0x10
> [ 7.498614][ T1] ? virtio_features_ok+0x10c/0x270
> [ 7.498614][ T1] virtio_dev_probe+0x991/0xaf0
> [ 7.498614][ T1] ? __pfx_virtio_dev_probe+0x10/0x10
> [ 7.498614][ T1] really_probe+0x29e/0xc50
> [ 7.498614][ T1] __driver_probe_device+0x1a2/0x3e0
> [ 7.508689][ T1] driver_probe_device+0x50/0x430
> [ 7.508689][ T1] __driver_attach+0x45f/0x710
> [ 7.508689][ T1] ? __pfx___driver_attach+0x10/0x10
> [ 7.508689][ T1] bus_for_each_dev+0x239/0x2b0
> [ 7.508689][ T1] ? __pfx___driver_attach+0x10/0x10
> [ 7.508689][ T1] ? __pfx_bus_for_each_dev+0x10/0x10
> [ 7.508689][ T1] ? do_raw_spin_unlock+0x13b/0x8b0
> [ 7.508689][ T1] bus_add_driver+0x347/0x620
> [ 7.508689][ T1] driver_register+0x23a/0x320
> [ 7.508689][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
> [ 7.508689][ T1] virtio_scsi_init+0x65/0xe0
> [ 7.518645][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
> [ 7.518645][ T1] do_one_initcall+0x238/0x830
> [ 7.518645][ T1] ? __pfx_virtio_scsi_init+0x10/0x10
> [ 7.518645][ T1] ? __pfx_do_one_initcall+0x10/0x10
> [ 7.518645][ T1] ? lockdep_hardirqs_on_prepare+0x43c/0x780
> [ 7.518645][ T1] ? __pfx_parse_args+0x10/0x10
> [ 7.518645][ T1] ? do_initcalls+0x1c/0x80
> [ 7.518645][ T1] ? rcu_is_watching+0x15/0xb0
> [ 7.518645][ T1] do_initcall_level+0x157/0x210
> [ 7.518645][ T1] do_initcalls+0x3f/0x80
> [ 7.518645][ T1] kernel_init_freeable+0x42f/0x5d0
> [ 7.528806][ T1] ? __pfx_kernel_init_freeable+0x10/0x10
> [ 7.528806][ T1] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
> [ 7.528806][ T1] ? __pfx_kernel_init+0x10/0x10
> [ 7.528806][ T1] ? __pfx_kernel_init+0x10/0x10
> [ 7.528806][ T1] ? __pfx_kernel_init+0x10/0x10
> [ 7.528806][ T1] kernel_init+0x1d/0x2b0
> [ 7.528806][ T1] ret_from_fork+0x4b/0x80
> [ 7.528806][ T1] ? __pfx_kernel_init+0x10/0x10
> [ 7.528806][ T1] ret_from_fork_asm+0x1b/0x30
> [ 7.528806][ T1] </TASK>
> [ 7.528806][ T1] Kernel Offset: disabled
> [ 7.528806][ T1] Rebooting in 86400 seconds..
>
>
> syzkaller build log:
> go env (err=<nil>)
> GO111MODULE='auto'
> GOARCH='amd64'
> GOBIN=''
> GOCACHE='/syzkaller/.cache/go-build'
> GOENV='/syzkaller/.config/go/env'
> GOEXE=''
> GOEXPERIMENT=''
> GOFLAGS=''
> GOHOSTARCH='amd64'
> GOHOSTOS='linux'
> GOINSECURE=''
> GOMODCACHE='/syzkaller/jobs/linux/gopath/pkg/mod'
> GONOPROXY=''
> GONOSUMDB=''
> GOOS='linux'
> GOPATH='/syzkaller/jobs/linux/gopath'
> GOPRIVATE=''
> GOPROXY='https://proxy.golang.org,direct'
> GOROOT='/usr/local/go'
> GOSUMDB='sum.golang.org'
> GOTMPDIR=''
> GOTOOLCHAIN='auto'
> GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
> GOVCS=''
> GOVERSION='go1.21.4'
> GCCGO='gccgo'
> GOAMD64='v1'
> AR='ar'
> CC='gcc'
> CXX='g++'
> CGO_ENABLED='1'
> GOMOD='/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mod'
> GOWORK=''
> CGO_CFLAGS='-O2 -g'
> CGO_CPPFLAGS=''
> CGO_CXXFLAGS='-O2 -g'
> CGO_FFLAGS='-O2 -g'
> CGO_LDFLAGS='-O2 -g'
> PKG_CONFIG='pkg-config'
> GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build2530895313=/tmp/go-build -gno-record-gcc-switches'
>
> git status (err=<nil>)
> HEAD detached at 6753db5cd
> nothing to commit, working tree clean
>
>
> tput: No value for $TERM and no -T specified
> tput: No value for $TERM and no -T specified
> Makefile:31: run command via tools/syz-env for best compatibility, see:
> Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
> go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./sys/syz-sysgen
> make .descriptions
> tput: No value for $TERM and no -T specified
> tput: No value for $TERM and no -T specified
> Makefile:31: run command via tools/syz-env for best compatibility, see:
> Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
> bin/syz-sysgen
> touch .descriptions
> GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=6753db5cdc04330ec9d1a5116b890c19481d69b3 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240320-145051'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-fuzzer github.com/google/syzkaller/syz-fuzzer
> GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=6753db5cdc04330ec9d1a5116b890c19481d69b3 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240320-145051'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
> GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=6753db5cdc04330ec9d1a5116b890c19481d69b3 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240320-145051'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-stress github.com/google/syzkaller/tools/syz-stress
> mkdir -p ./bin/linux_amd64
> gcc -o ./bin/linux_amd64/syz-executor executor/executor.cc \
> -m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \
> -DHOSTGOOS_linux=1 -DGIT_REVISION=\"6753db5cdc04330ec9d1a5116b890c19481d69b3\"
>
>
> Error text is too large and was truncated, full error text is at:
> https://syzkaller.appspot.com/x/error.txt?x=1254e231180000
>
>
> Tested on:
>
> commit: 217b2119 mm,page_owner: implement the tracking of the ..
> git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> kernel config: https://syzkaller.appspot.com/x/.config?x=527195e149aa3091
> dashboard link: https://syzkaller.appspot.com/bug?extid=70f57d8a3ae84934c003
> compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
>
> Note: no patches were applied.
>
#syz fix: mm,page_owner: Fix refcount imbalance
#syz fix: mm,page_owner: fix refcount imbalance