Hello,
syzbot found the following issue on:
HEAD commit: 715abedee4cd Add linux-next specific files for 20230515
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=13c96725280000
kernel config: https://syzkaller.appspot.com/x/.config?x=6a2745d066dda0ec
dashboard link: https://syzkaller.appspot.com/bug?extid=1c54f0eff457978ad5f9
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1588e999280000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1013cbc1280000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/d4d1d06b34b8/disk-715abede.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3ef33a86fdc8/vmlinux-715abede.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e0006b413ed1/bzImage-715abede.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/0e228936b617/mount_0.gz
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 0xdffffc000000839c: 0000 [#1] PREEMPT SMP KASAN
KASAN: probably user-memory-access in range [0x0000000000041ce0-0x0000000000041ce7]
CPU: 0 PID: 5001 Comm: syz-executor387 Not tainted 6.4.0-rc2-next-20230515-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:__iterate_interfaces+0x85/0x570 net/mac80211/util.c:749
Code: 40 1b 00 00 4c 39 f3 0f 84 82 02 00 00 48 bd 00 00 00 00 00 fc ff df e8 f9 d5 ec f7 4c 8d a3 98 1c 00 00 4c 89 e0 48 c1 e8 03 <0f> b6 04 28 84 c0 74 08 3c 03 0f 8e 5d 04 00 00 8b bb 98 1c 00 00
RSP: 0018:ffffc90000007d90 EFLAGS: 00010206
RAX: 000000000000839c RBX: 0000000000040048 RCX: 0000000000000100
RDX: ffff888026db8000 RSI: ffffffff89974db7 RDI: 0000000000000005
RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: ffffc90000007ff8 R12: 0000000000041ce0
R13: 0000000000000000 R14: ffff88802ab22920 R15: 0000000000000002
FS: 00005555565e7300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564e16122000 CR3: 0000000021303000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
ieee80211_iterate_active_interfaces_atomic+0x73/0x1c0 net/mac80211/util.c:802
mac80211_hwsim_beacon+0x101/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2283
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x599/0xa30 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x17f/0x360 kernel/time/hrtimer.c:1766
__do_softirq+0x1d4/0x905 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644
sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1106
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:memmove+0x28/0x1b0 arch/x86/lib/memmove_64.S:44
Code: c3 90 f3 0f 1e fa 48 89 f8 48 39 fe 7d 0f 49 89 f0 49 01 d0 49 39 f8 0f 8f b5 00 00 00 48 83 fa 20 0f 82 01 01 00 00 48 89 d1 <f3> a4 c3 48 81 fa a8 02 00 00 72 05 40 38 fe 74 47 48 83 ea 20 48
RSP: 0018:ffffc900039aefb0 EFLAGS: 00010282
RAX: ffff888073521fb4 RBX: 0000000000000002 RCX: fffffffff2718d78
RDX: ffffffffffffffe1 RSI: ffff888080e0920d RDI: ffff888080e0921d
RBP: 0000000000000020 R08: ffff888073521f85 R09: 0000766972705f73
R10: 667265736965722e R11: 0000766972705f73 R12: 0000000000000001
R13: 0000000000000001 R14: ffff888073521fa4 R15: 0000000000000010
leaf_paste_entries+0x44d/0x910 fs/reiserfs/lbalance.c:1377
balance_leaf_finish_node_paste_dirent fs/reiserfs/do_balan.c:1295 [inline]
balance_leaf_finish_node_paste fs/reiserfs/do_balan.c:1321 [inline]
balance_leaf_finish_node fs/reiserfs/do_balan.c:1364 [inline]
balance_leaf+0x9853/0xddc0 fs/reiserfs/do_balan.c:1452
do_balance+0x319/0x810 fs/reiserfs/do_balan.c:1888
reiserfs_paste_into_item+0x74b/0x8d0 fs/reiserfs/stree.c:2157
reiserfs_add_entry+0x8cb/0xcf0 fs/reiserfs/namei.c:565
reiserfs_mkdir+0x683/0x990 fs/reiserfs/namei.c:860
xattr_mkdir fs/reiserfs/xattr.c:77 [inline]
create_privroot fs/reiserfs/xattr.c:890 [inline]
reiserfs_xattr_init+0x57e/0xbc0 fs/reiserfs/xattr.c:1006
reiserfs_fill_super+0x2129/0x2eb0 fs/reiserfs/super.c:2175
mount_bdev+0x357/0x420 fs/super.c:1380
legacy_get_tree+0x109/0x220 fs/fs_context.c:610
vfs_get_tree+0x8d/0x350 fs/super.c:1510
do_new_mount fs/namespace.c:3039 [inline]
path_mount+0x134b/0x1e40 fs/namespace.c:3369
do_mount fs/namespace.c:3382 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount fs/namespace.c:3568 [inline]
__x64_sys_mount+0x283/0x300 fs/namespace.c:3568
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fdf5f19069a
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5001 at arch/x86/mm/tlb.c:1295 nmi_uaccess_okay+0x99/0xb0 arch/x86/mm/tlb.c:1295
Modules linked in:
CPU: 0 PID: 5001 Comm: syz-executor387 Not tainted 6.4.0-rc2-next-20230515-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:nmi_uaccess_okay+0x99/0xb0 arch/x86/mm/tlb.c:1295
Code: d8 48 ba 00 f0 ff ff ff ff 0f 00 41 b8 01 00 00 00 48 21 d0 48 ba 00 00 00 00 80 88 ff ff 48 01 d0 48 39 85 80 00 00 00 74 b0 <0f> 0b eb ac 0f 0b eb a0 e8 5a 59 9d 00 eb 8d e8 53 59 9d 00 eb be
RSP: 0018:ffffc90000007a18 EFLAGS: 00010007
RAX: ffff888021303000 RBX: ffff8880780c8000 RCX: 0000000000000100
RDX: ffff888000000000 RSI: ffffffff8a063b4d RDI: ffff8880780c8080
RBP: ffff8880780c8000 R08: 0000000000000001 R09: 00007fdf5f190670
R10: 00007fdf5f1906b0 R11: 0000000000000001 R12: 00007fdf5f190670
R13: 00007fdf5f1906b0 R14: 0000000000000000 R15: ffffc90000007b88
FS: 00005555565e7300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564e16122000 CR3: 0000000021303000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
copy_from_user_nmi+0x62/0x150 arch/x86/lib/usercopy.c:39
copy_code arch/x86/kernel/dumpstack.c:91 [inline]
show_opcodes+0x5d/0xd0 arch/x86/kernel/dumpstack.c:121
show_ip arch/x86/kernel/dumpstack.c:144 [inline]
show_iret_regs+0x30/0x60 arch/x86/kernel/dumpstack.c:149
__show_regs+0x22/0x680 arch/x86/kernel/process_64.c:75
show_trace_log_lvl+0x256/0x390 arch/x86/kernel/dumpstack.c:298
__die_body arch/x86/kernel/dumpstack.c:417 [inline]
die_addr+0x3c/0xa0 arch/x86/kernel/dumpstack.c:457
__exc_general_protection arch/x86/kernel/traps.c:783 [inline]
exc_general_protection+0x129/0x230 arch/x86/kernel/traps.c:728
asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:564
RIP: 0010:__iterate_interfaces+0x85/0x570 net/mac80211/util.c:749
Code: 40 1b 00 00 4c 39 f3 0f 84 82 02 00 00 48 bd 00 00 00 00 00 fc ff df e8 f9 d5 ec f7 4c 8d a3 98 1c 00 00 4c 89 e0 48 c1 e8 03 <0f> b6 04 28 84 c0 74 08 3c 03 0f 8e 5d 04 00 00 8b bb 98 1c 00 00
RSP: 0018:ffffc90000007d90 EFLAGS: 00010206
RAX: 000000000000839c RBX: 0000000000040048 RCX: 0000000000000100
RDX: ffff888026db8000 RSI: ffffffff89974db7 RDI: 0000000000000005
RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: ffffc90000007ff8 R12: 0000000000041ce0
R13: 0000000000000000 R14: ffff88802ab22920 R15: 0000000000000002
ieee80211_iterate_active_interfaces_atomic+0x73/0x1c0 net/mac80211/util.c:802
mac80211_hwsim_beacon+0x101/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2283
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x599/0xa30 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x17f/0x360 kernel/time/hrtimer.c:1766
__do_softirq+0x1d4/0x905 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644
sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1106
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:memmove+0x28/0x1b0 arch/x86/lib/memmove_64.S:44
Code: c3 90 f3 0f 1e fa 48 89 f8 48 39 fe 7d 0f 49 89 f0 49 01 d0 49 39 f8 0f 8f b5 00 00 00 48 83 fa 20 0f 82 01 01 00 00 48 89 d1 <f3> a4 c3 48 81 fa a8 02 00 00 72 05 40 38 fe 74 47 48 83 ea 20 48
RSP: 0018:ffffc900039aefb0 EFLAGS: 00010282
RAX: ffff888073521fb4 RBX: 0000000000000002 RCX: fffffffff2718d78
RDX: ffffffffffffffe1 RSI: ffff888080e0920d RDI: ffff888080e0921d
RBP: 0000000000000020 R08: ffff888073521f85 R09: 0000766972705f73
R10: 667265736965722e R11: 0000766972705f73 R12: 0000000000000001
R13: 0000000000000001 R14: ffff888073521fa4 R15: 0000000000000010
leaf_paste_entries+0x44d/0x910 fs/reiserfs/lbalance.c:1377
balance_leaf_finish_node_paste_dirent fs/reiserfs/do_balan.c:1295 [inline]
balance_leaf_finish_node_paste fs/reiserfs/do_balan.c:1321 [inline]
balance_leaf_finish_node fs/reiserfs/do_balan.c:1364 [inline]
balance_leaf+0x9853/0xddc0 fs/reiserfs/do_balan.c:1452
do_balance+0x319/0x810 fs/reiserfs/do_balan.c:1888
reiserfs_paste_into_item+0x74b/0x8d0 fs/reiserfs/stree.c:2157
reiserfs_add_entry+0x8cb/0xcf0 fs/reiserfs/namei.c:565
reiserfs_mkdir+0x683/0x990 fs/reiserfs/namei.c:860
xattr_mkdir fs/reiserfs/xattr.c:77 [inline]
create_privroot fs/reiserfs/xattr.c:890 [inline]
reiserfs_xattr_init+0x57e/0xbc0 fs/reiserfs/xattr.c:1006
reiserfs_fill_super+0x2129/0x2eb0 fs/reiserfs/super.c:2175
mount_bdev+0x357/0x420 fs/super.c:1380
legacy_get_tree+0x109/0x220 fs/fs_context.c:610
vfs_get_tree+0x8d/0x350 fs/super.c:1510
do_new_mount fs/namespace.c:3039 [inline]
path_mount+0x134b/0x1e40 fs/namespace.c:3369
do_mount fs/namespace.c:3382 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount fs/namespace.c:3568 [inline]
__x64_sys_mount+0x283/0x300 fs/namespace.c:3568
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fdf5f19069a
Code: Unable to access opcode bytes at 0x7fdf5f190670.
RSP: 002b:00007fffd1387398 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fdf5f19069a
RDX: 0000000020001100 RSI: 0000000020000180 RDI: 00007fffd13873b0
RBP: 00007fffd13873b0 R08: 00007fffd13873f0 R09: 00000000000010de
R10: 0000000000000080 R11: 0000000000000286 R12: 0000000000000004
R13: 00005555565e72b8 R14: 0000000000000080 R15: 00007fffd13873f0
</TASK>
----------------
Code disassembly (best guess):
0: 40 1b 00 rex sbb (%rax),%eax
3: 00 4c 39 f3 add %cl,-0xd(%rcx,%rdi,1)
7: 0f 84 82 02 00 00 je 0x28f
d: 48 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%rbp
14: fc ff df
17: e8 f9 d5 ec f7 callq 0xf7ecd615
1c: 4c 8d a3 98 1c 00 00 lea 0x1c98(%rbx),%r12
23: 4c 89 e0 mov %r12,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 0f b6 04 28 movzbl (%rax,%rbp,1),%eax <-- trapping instruction
2e: 84 c0 test %al,%al
30: 74 08 je 0x3a
32: 3c 03 cmp $0x3,%al
34: 0f 8e 5d 04 00 00 jle 0x497
3a: 8b bb 98 1c 00 00 mov 0x1c98(%rbx),%edi
---
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If the bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
If you want to change bug's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
On Thu, 2023-06-01 at 14:24 -0700, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 715abedee4cd Add linux-next specific files for 20230515
> git tree: linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=13c96725280000
> kernel config: https://syzkaller.appspot.com/x/.config?x=6a2745d066dda0ec
> dashboard link: https://syzkaller.appspot.com/bug?extid=1c54f0eff457978ad5f9
> compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1588e999280000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1013cbc1280000
>
Looking at the reproducers, there's basically nothing happening in wifi.
So seems likely it's just some really bad memory corruption issue in
reiserfs?
johannes
On Fri, Jun 23, 2023 at 1:08 PM Johannes Berg <[email protected]> wrote:
>
> On Thu, 2023-06-01 at 14:24 -0700, syzbot wrote:
> > Hello,
> >
> > syzbot found the following issue on:
> >
> > HEAD commit: 715abedee4cd Add linux-next specific files for 20230515
> > git tree: linux-next
> > console output: https://syzkaller.appspot.com/x/log.txt?x=13c96725280000
> > kernel config: https://syzkaller.appspot.com/x/.config?x=6a2745d066dda0ec
> > dashboard link: https://syzkaller.appspot.com/bug?extid=1c54f0eff457978ad5f9
> > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1588e999280000
> > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1013cbc1280000
> >
>
> Looking at the reproducers, there's basically nothing happening in wifi.
>
> So seems likely it's just some really bad memory corruption issue in
> reiserfs?
Looks like that indeed.
Let's update bug's subsystems on the syzbot dashboard:
#syz set subsystems: reiserfs
>
> johannes
>
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