[syzbot] [xfs?] general protection fault in xfs_destroy_mount_workqueues

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May 19, 2024, 11:13:35 AMMay 19
to chanda...@oracle.com, djw...@kernel.org, linux-...@vger.kernel.org, linu...@vger.kernel.org, syzkall...@googlegroups.com
Hello,

syzbot found the following issue on:

HEAD commit: 3d25a941ea50 Merge tag 'block-6.9-20240503' of git://git.k..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16832004980000
kernel config: https://syzkaller.appspot.com/x/.config?x=3310e643b6ef5d69
dashboard link: https://syzkaller.appspot.com/bug?extid=8905ded1b49ae88b96a6
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-3d25a941.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/9d8ed74e49f1/vmlinux-3d25a941.xz
kernel image: https://storage.googleapis.com/syzbot-assets/d724e9151b52/bzImage-3d25a941.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8905de...@syzkaller.appspotmail.com

XFS (loop3): Unmounting Filesystem 4194cad6-cad4-4798-ac4c-c2118f686eb1
general protection fault, probably for non-canonical address 0xe01ffbf1100d6a7e: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: maybe wild-memory-access in range [0x00ffff88806b53f0-0x00ffff88806b53f7]
CPU: 2 PID: 1404 Comm: syz-executor.3 Not tainted 6.9.0-rc6-syzkaller-00227-g3d25a941ea50 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__lock_acquire+0xe3e/0x3b30 kernel/locking/lockdep.c:5005
Code: 11 00 00 39 05 f3 80 de 11 0f 82 be 05 00 00 ba 01 00 00 00 e9 e4 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 82 1f 00 00 49 81 3c 24 a0 2c a1 92 0f 84 98 f2
RSP: 0018:ffffc90004047ab8 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 001ffff1100d6a7e RSI: ffff888052a24880 RDI: 00ffff88806b53f1
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8f9f5217 R11: 0000000000000003 R12: 00ffff88806b53f1
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001
FS: 0000555587484480(0000) GS:ffff88806b400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd649d1c18 CR3: 000000005b7a0000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
__raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
_raw_spin_lock_irq+0x36/0x50 kernel/locking/spinlock.c:170
put_pwq_unlocked kernel/workqueue.c:1671 [inline]
put_pwq_unlocked kernel/workqueue.c:1664 [inline]
destroy_workqueue+0x5df/0xaa0 kernel/workqueue.c:5739
xfs_destroy_mount_workqueues+0x37/0x150 fs/xfs/xfs_super.c:599
xfs_fs_put_super+0x134/0x160 fs/xfs/xfs_super.c:1141
generic_shutdown_super+0x159/0x3d0 fs/super.c:641
kill_block_super+0x3b/0x90 fs/super.c:1675
xfs_kill_sb+0x15/0x50 fs/xfs/xfs_super.c:2026
deactivate_locked_super+0xbe/0x1a0 fs/super.c:472
deactivate_super+0xde/0x100 fs/super.c:505
cleanup_mnt+0x222/0x450 fs/namespace.c:1267
task_work_run+0x14e/0x250 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xdc/0x260 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9526a7efd7
Code: b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd649d23c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f9526a7efd7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd649d2480
RBP: 00007ffd649d2480 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd649d3540
R13: 00007f9526ac83b9 R14: 00000000000ddcc5 R15: 0000000000000014
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0xe3e/0x3b30 kernel/locking/lockdep.c:5005
Code: 11 00 00 39 05 f3 80 de 11 0f 82 be 05 00 00 ba 01 00 00 00 e9 e4 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 82 1f 00 00 49 81 3c 24 a0 2c a1 92 0f 84 98 f2
RSP: 0018:ffffc90004047ab8 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 001ffff1100d6a7e RSI: ffff888052a24880 RDI: 00ffff88806b53f1
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8f9f5217 R11: 0000000000000003 R12: 00ffff88806b53f1
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001
FS: 0000555587484480(0000) GS:ffff88806b400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd649d1c18 CR3: 000000005b7a0000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 11 00 adc %eax,(%rax)
2: 00 39 add %bh,(%rcx)
4: 05 f3 80 de 11 add $0x11de80f3,%eax
9: 0f 82 be 05 00 00 jb 0x5cd
f: ba 01 00 00 00 mov $0x1,%edx
14: e9 e4 00 00 00 jmp 0xfd
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 82 1f 00 00 jne 0x1fb6
34: 49 81 3c 24 a0 2c a1 cmpq $0xffffffff92a12ca0,(%r12)
3b: 92
3c: 0f .byte 0xf
3d: 84 .byte 0x84
3e: 98 cwtl
3f: f2 repnz


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