Hello,
syzbot found the following issue on:
HEAD commit: fffe3ae0 Merge tag 'for-linus-hmm' of git://git.kernel.org..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12f34d3a900000
kernel config: https://syzkaller.appspot.com/x/.config?x=50463ec6729f9706
dashboard link: https://syzkaller.appspot.com/bug?extid=8f2165a7b1f2820feffc
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1517701c900000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11b7e0e2900000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email protected]
general protection fault, probably for non-canonical address 0xdffffc000000004c: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000260-0x0000000000000267]
CPU: 0 PID: 12765 Comm: syz-executor391 Not tainted 5.8.0-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
RIP: 0010:sctp_ulpevent_notify_peer_addr_change+0xa9/0xad0 net/sctp/ulpevent.c:346
Code: 03 80 3c 18 00 0f 85 9f 08 00 00 48 8b 9d b0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 60 02 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 3a 08 00 00 44 8b a3 60 02 00
RSP: 0018:ffffc90000d27380 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 000000000000004c RSI: ffffffff875c9422 RDI: 0000000000000260
RBP: ffff8880235da158 R08: 0000000000000001 R09: ffff8880234cdd48
R10: fffffbfff155f111 R11: 0000000000000000 R12: 0000000000000001
R13: 1ffff920001a4e76 R14: 0000000000000004 R15: 0000000000000000
FS: 00007fdd571b7700(0000) GS:ffff88802ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 000000001c9d0000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
sctp_assoc_set_primary+0x6c/0x300 net/sctp/associola.c:435
sctp_assoc_rm_peer+0x6f7/0x950 net/sctp/associola.c:508
sctp_assoc_update+0x588/0xfd0 net/sctp/associola.c:1116
sctp_cmd_assoc_update net/sctp/sm_sideeffect.c:836 [inline]
sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1305 [inline]
sctp_side_effects net/sctp/sm_sideeffect.c:1185 [inline]
sctp_do_sm+0x27f8/0x4d80 net/sctp/sm_sideeffect.c:1156
sctp_assoc_bh_rcv+0x386/0x6c0 net/sctp/associola.c:1044
sctp_inq_push+0x1da/0x270 net/sctp/inqueue.c:80
sctp_backlog_rcv+0x19e/0x5c0 net/sctp/input.c:344
sk_backlog_rcv include/net/sock.h:1001 [inline]
__release_sock+0x134/0x3a0 net/core/sock.c:2550
release_sock+0x54/0x1b0 net/core/sock.c:3087
sctp_wait_for_connect+0x30f/0x540 net/sctp/socket.c:9302
__sctp_connect+0x96b/0xc00 net/sctp/socket.c:1247
__sctp_setsockopt_connectx+0x12d/0x180 net/sctp/socket.c:1343
sctp_setsockopt_connectx net/sctp/socket.c:1375 [inline]
sctp_setsockopt net/sctp/socket.c:4720 [inline]
sctp_setsockopt+0x1642/0x70d0 net/sctp/socket.c:4677
__sys_setsockopt+0x24a/0x480 net/socket.c:2127
__do_sys_setsockopt net/socket.c:2143 [inline]
__se_sys_setsockopt net/socket.c:2140 [inline]
__x64_sys_setsockopt+0xba/0x150 net/socket.c:2140
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x43e119
Code: e8 4c b5 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 bb d0 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fdd571b6ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00000000006c7c58 RCX: 000000000043e119
RDX: 000000000000006e RSI: 0000000000000084 RDI: 0000000000000003
RBP: 00000000006c7c50 R08: 0000000000000020 R09: 0000000000000000
R10: 0000000020000000 R11: 0000000000000246 R12: 00000000006c7c5c
R13: 00007ffdb7fcef0f R14: 00007fdd57197000 R15: 0000000000000003
Modules linked in:
---[ end trace 49c057cb66761ca9 ]---
RIP: 0010:sctp_ulpevent_notify_peer_addr_change+0xa9/0xad0 net/sctp/ulpevent.c:346
Code: 03 80 3c 18 00 0f 85 9f 08 00 00 48 8b 9d b0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 60 02 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 3a 08 00 00 44 8b a3 60 02 00
RSP: 0018:ffffc90000d27380 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 000000000000004c RSI: ffffffff875c9422 RDI: 0000000000000260
RBP: ffff8880235da158 R08: 0000000000000001 R09: ffff8880234cdd48
R10: fffffbfff155f111 R11: 0000000000000000 R12: 0000000000000001
R13: 1ffff920001a4e76 R14: 0000000000000004 R15: 0000000000000000
FS: 00007fdd571b7700(0000) GS:ffff88802cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 000000001c9d0000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
---
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On Mon, Aug 10, 2020 at 08:37:18AM -0700, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: fffe3ae0 Merge tag 'for-linus-hmm' of git://git.kernel.org..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=12f34d3a900000
> kernel config: https://syzkaller.appspot.com/x/.config?x=50463ec6729f9706
> dashboard link: https://syzkaller.appspot.com/bug?extid=8f2165a7b1f2820feffc
> compiler: gcc (GCC) 10.1.0-syz 20200507
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1517701c900000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11b7e0e2900000
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: [email protected]
>
> general protection fault, probably for non-canonical address 0xdffffc000000004c: 0000 [#1] PREEMPT SMP KASAN
> KASAN: null-ptr-deref in range [0x0000000000000260-0x0000000000000267]
> CPU: 0 PID: 12765 Comm: syz-executor391 Not tainted 5.8.0-syzkaller #0
> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
> RIP: 0010:sctp_ulpevent_notify_peer_addr_change+0xa9/0xad0 net/sctp/ulpevent.c:346
Crashed in code added by 45ebf73ebcec ("sctp: check assoc before
SCTP_ADDR_{MADE_PRIM, ADDED} event"), but it would have crashed a
couple of instructions later on already anyway.
I can't reproduce this crash, with the same commit and kernel config.
I'm not seeing how transport->asoc can be null at there.
While trying to reproduce this, when I aborted a test, I actually
triggerred:
[ 1527.736212][ T8008] team0 (unregistering): Port device team_slave_1 removed
[ 1527.896902][ T8008] team0 (unregistering): Port device team_slave_0 removed
[ 1528.053936][ T8008] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[ 1528.445113][ T8008] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[ 1528.915669][ T8008] bond0 (unregistering): Released all slaves
[ 1530.531179][ T8008] ------------[ cut here ]------------
[ 1530.666414][ T8008] ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x90
[ 1530.913574][ T8008] WARNING: CPU: 11 PID: 8008 at lib/debugobjects.c:485 debug_print_object+0x160/0x250
[ 1531.165944][ T8008] Kernel panic - not syncing: panic_on_warn set ...
[ 1531.291997][ T8008] CPU: 11 PID: 8008 Comm: kworker/u48:8 Not tainted 5.8.0+ #6
[ 1531.554397][ T8008] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-2.fc32 04/01/2014
[ 1531.842844][ T8008] Workqueue: netns cleanup_net
[ 1531.983054][ T8008] Call Trace:
[ 1532.122433][ T8008] dump_stack+0x18f/0x20d
[ 1532.257582][ T8008] panic+0x2e3/0x75c
[ 1532.385158][ T8008] ? __warn_printk+0xf3/0xf3
[ 1532.520152][ T8008] ? console_unlock+0x7f0/0xf30
[ 1532.643891][ T8008] ? __warn.cold+0x5/0x45
[ 1532.763171][ T8008] ? __warn+0xd6/0x1f2
[ 1532.884107][ T8008] ? debug_print_object+0x160/0x250
[ 1533.011290][ T8008] __warn.cold+0x20/0x45
[ 1533.132625][ T8008] ? wake_up_klogd.part.0+0x8c/0xc0
[ 1533.248423][ T8008] ? debug_print_object+0x160/0x250
[ 1533.370165][ T8008] report_bug+0x1bd/0x210
[ 1533.492858][ T8008] handle_bug+0x38/0x90
[ 1533.614108][ T8008] exc_invalid_op+0x14/0x40
[ 1533.730968][ T8008] asm_exc_invalid_op+0x12/0x20
[ 1533.851289][ T8008] RIP: 0010:debug_print_object+0x160/0x250
[ 1533.964027][ T8008] Code: dd 40 b8 93 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd 40 b8 93 88 48 c7 c7 a0 ad 93 88 e8 02 66 a9 fd <0f> 0b 83 05 73 9f 13 07 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89
[ 1534.313398][ T8008] RSP: 0018:ffffc90000e378a8 EFLAGS: 00010086
[ 1534.432053][ T8008] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
[ 1534.677101][ T8008] RDX: ffff8881331a2300 RSI: ffffffff815d8e17 RDI: fffff520001c6f07
[ 1534.930977][ T8008] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff888142fa0fcb
[ 1535.180403][ T8008] R10: 0000000000000000 R11: 0000000000008026 R12: ffffffff89bce120
[ 1535.424399][ T8008] R13: ffffffff81636500 R14: dead000000000100 R15: dffffc0000000000
[ 1535.678140][ T8008] ? calc_wheel_index+0x3f0/0x3f0
[ 1535.808026][ T8008] ? vprintk_func+0x97/0x1a6
[ 1535.939928][ T8008] ? debug_print_object+0x160/0x250
[ 1536.072538][ T8008] debug_check_no_obj_freed+0x301/0x41c
[ 1536.203742][ T8008] ? dev_attr_show+0x90/0x90
[ 1536.343659][ T8008] kfree+0xf0/0x2c0
[ 1536.484984][ T8008] ? dev_attr_show+0x90/0x90
[ 1536.620853][ T8008] kvfree+0x42/0x50
[ 1536.752990][ T8008] ? netdev_class_remove_file_ns+0x30/0x30
[ 1536.886457][ T8008] device_release+0x71/0x200
[ 1537.015419][ T8008] ? dev_attr_show+0x90/0x90
[ 1537.142315][ T8008] kobject_put+0x171/0x270
[ 1537.269426][ T8008] netdev_run_todo+0x765/0xac0
[ 1537.402993][ T8008] ? dev_xdp_uninstall+0x3f0/0x3f0
[ 1537.542007][ T8008] ? default_device_exit_batch+0x3d0/0x3d0
[ 1537.679397][ T8008] ? unregister_netdevice_many+0x50/0x50
[ 1537.811168][ T8008] ? sysfs_remove_group+0xc2/0x170
[ 1537.941789][ T8008] default_device_exit_batch+0x316/0x3d0
[ 1538.075268][ T8008] ? unregister_netdev+0x20/0x20
[ 1538.209131][ T8008] ? __init_waitqueue_head+0x110/0x110
[ 1538.340541][ T8008] ? cfg802154_switch_netns+0x440/0x440
[ 1538.468571][ T8008] ? unregister_netdev+0x20/0x20
[ 1538.574138][ T8008] ? dev_change_net_namespace+0x1200/0x1200
[ 1538.676756][ T8008] ops_exit_list+0x10d/0x160
[ 1538.778236][ T8008] cleanup_net+0x4ea/0xa00
[ 1538.877412][ T8008] ? ops_free_list.part.0+0x3d0/0x3d0
[ 1538.977271][ T8008] ? lock_is_held_type+0xbb/0xf0
[ 1539.069114][ T8008] process_one_work+0x94c/0x1670
[ 1539.165257][ T8008] ? lock_release+0x8e0/0x8e0
[ 1539.257102][ T8008] ? pwq_dec_nr_in_flight+0x2d0/0x2d0
[ 1539.343961][ T8008] ? rwlock_bug.part.0+0x90/0x90
[ 1539.433524][ T8008] worker_thread+0x64c/0x1120
[ 1539.521045][ T8008] ? process_one_work+0x1670/0x1670
[ 1539.610356][ T8008] kthread+0x3b5/0x4a0
[ 1539.698844][ T8008] ? __kthread_bind_mask+0xc0/0xc0
[ 1539.788834][ T8008] ? __kthread_bind_mask+0xc0/0xc0
[ 1539.871367][ T8008] ret_from_fork+0x1f/0x30
[ 1539.959633][ T8008] Kernel Offset: disabled
[ 1540.038379][ T8008] Rebooting in 86400 seconds..
On Mon, Aug 10, 2020 at 8:31 PM Marcelo Ricardo Leitner
<[email protected]> wrote:
>
> On Mon, Aug 10, 2020 at 08:37:18AM -0700, syzbot wrote:
> > Hello,
> >
> > syzbot found the following issue on:
> >
> > HEAD commit: fffe3ae0 Merge tag 'for-linus-hmm' of git://git.kernel.org..
> > git tree: upstream
> > console output: https://syzkaller.appspot.com/x/log.txt?x=12f34d3a900000
> > kernel config: https://syzkaller.appspot.com/x/.config?x=50463ec6729f9706
> > dashboard link: https://syzkaller.appspot.com/bug?extid=8f2165a7b1f2820feffc
> > compiler: gcc (GCC) 10.1.0-syz 20200507
> > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1517701c900000
> > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11b7e0e2900000
> >
> > IMPORTANT: if you fix the issue, please add the following tag to the commit:
> > Reported-by: [email protected]
> >
> > general protection fault, probably for non-canonical address 0xdffffc000000004c: 0000 [#1] PREEMPT SMP KASAN
> > KASAN: null-ptr-deref in range [0x0000000000000260-0x0000000000000267]
> > CPU: 0 PID: 12765 Comm: syz-executor391 Not tainted 5.8.0-syzkaller #0
> > Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
> > RIP: 0010:sctp_ulpevent_notify_peer_addr_change+0xa9/0xad0 net/sctp/ulpevent.c:346
>
> Crashed in code added by 45ebf73ebcec ("sctp: check assoc before
> SCTP_ADDR_{MADE_PRIM, ADDED} event"), but it would have crashed a
> couple of instructions later on already anyway.
>
> I can't reproduce this crash, with the same commit and kernel config.
> I'm not seeing how transport->asoc can be null at there.
>
I haven't been able to reproduce this yet either.
Doesn't this report have similarities with "general protection fault
in sctp_ulpevent_nofity_peer_addr_change" from 19 March 2020?
https://syzkaller.appspot.com/bug?extid=3950016bd95c2ca0377b