[syzbot] [io-uring?] general protection fault in worker_thread (2)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: e660abd551f1 Merge tag 'acpi-6.4-rc8' of git://git.kernel...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17e5a5b7280000
kernel config: https://syzkaller.appspot.com/x/.config?x=24ce1b2abaee24cc
dashboard link: https://syzkaller.appspot.com/bug?extid=8aebf783fcc04684a047
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=12f0094b280000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-e660abd5.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/6157b122cedf/vmlinux-e660abd5.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3ca86f1fadbf/bzImage-e660abd5.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8aebf7...@syzkaller.appspotmail.com

general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 3 PID: 5205 Comm: kworker/2:4 Not tainted 6.4.0-rc7-syzkaller-00041-ge660abd551f1 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:__lock_acquire+0xe01/0x5f30 kernel/locking/lockdep.c:4956
Code: 00 00 3b 05 a1 ce 59 0f 0f 87 7a 09 00 00 41 be 01 00 00 00 e9 84 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 9e 33 00 00 49 81 3c 24 20 78 15 90 0f 84 cd f2
RSP: 0018:ffffc90003d27be0 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 1ffff920007a4fad RCX: 0000000000000000
RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000018
RBP: ffff88802f9fd6c0 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000018
R13: 0000000000000000 R14: 0000000000000018 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff88806b900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f896259d440 CR3: 00000000293e8000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
lock_acquire kernel/locking/lockdep.c:5705 [inline]
lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670
__raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
_raw_spin_lock_irq+0x36/0x50 kernel/locking/spinlock.c:170
worker_thread+0x16d/0x10c0 kernel/workqueue.c:2502
kthread+0x344/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0xe01/0x5f30 kernel/locking/lockdep.c:4956
Code: 00 00 3b 05 a1 ce 59 0f 0f 87 7a 09 00 00 41 be 01 00 00 00 e9 84 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 9e 33 00 00 49 81 3c 24 20 78 15 90 0f 84 cd f2
RSP: 0018:ffffc90003d27be0 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 1ffff920007a4fad RCX: 0000000000000000
RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000018
RBP: ffff88802f9fd6c0 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000018
R13: 0000000000000000 R14: 0000000000000018 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff88806b900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f896259d440 CR3: 00000000293e8000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 3b 05 a1 ce 59 0f cmp 0xf59cea1(%rip),%eax # 0xf59cea9
8: 0f 87 7a 09 00 00 ja 0x988
e: 41 be 01 00 00 00 mov $0x1,%r14d
14: e9 84 00 00 00 jmpq 0x9d
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 4c 89 e2 mov %r12,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 0f 85 9e 33 00 00 jne 0x33d2
34: 49 81 3c 24 20 78 15 cmpq $0xffffffff90157820,(%r12)
3b: 90
3c: 0f .byte 0xf
3d: 84 cd test %cl,%ch
3f: f2 repnz


---
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 syzk...@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

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

[syzbot]

Auto-closing this bug as obsolete.
No recent activity, existing reproducers are no longer triggering the issue.