linux-kernel - [syzbot] [btrfs?] general protection fault in put_pwq

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Message-ID: <6714a705.050a0220.1e4b4d.0035.GAE@google.com>
Date: Sat, 19 Oct 2024 23:45:25 -0700
From: syzbot <syzbot+aa930d41d2f32904c5da@...kaller.appspotmail.com>
To: cem@...nel.org, clm@...com, djwong@...nel.org, dsterba@...e.com, 
	josef@...icpanda.com, linux-btrfs@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-xfs@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [btrfs?] general protection fault in put_pwq_unlocked (2)

Hello,

syzbot found the following issue on:

HEAD commit:    f9e4825524aa Merge tag 'input-for-v6.12-rc3' of git://git...
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=129220a7980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=78db40d8379956d9
dashboard link: https://syzkaller.appspot.com/bug?extid=aa930d41d2f32904c5da
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c73069e3297a/disk-f9e48255.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/efe8e01d8c7c/vmlinux-f9e48255.xz
kernel image: https://storage.googleapis.com/syzbot-assets/35d48123aca0/bzImage-f9e48255.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+aa930d41d2f32904c5da@...kaller.appspotmail.com

XFS (loop2): Unmounting Filesystem bfdc47fc-10d8-4eed-a562-11a831b3f791
Oops: general protection fault, probably for non-canonical address 0xe01ffbf110170e7f: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: maybe wild-memory-access in range [0x00ffff8880b873f8-0x00ffff8880b873ff]
CPU: 1 UID: 0 PID: 5226 Comm: syz-executor Not tainted 6.12.0-rc3-syzkaller-00403-gf9e4825524aa #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__lock_acquire+0x69/0x2050 kernel/locking/lockdep.c:5065
Code: b6 04 30 84 c0 0f 85 9b 16 00 00 45 31 f6 83 3d f8 a7 ab 0e 00 0f 84 b6 13 00 00 89 54 24 54 89 5c 24 68 4c 89 f8 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 ff e8 b9 2b 8b 00 48 be 00 00 00 00 00 fc
RSP: 0000:ffffc90004247970 EFLAGS: 00010002
RAX: 001ffff110170e7f RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 00ffff8880b873f9
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff2037a4e R12: ffff8880617c0000
R13: 0000000000000001 R14: 0000000000000000 R15: 00ffff8880b873f9
FS:  00005555724f4500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe0c1d37a8c CR3: 0000000061f58000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
 _raw_spin_lock_irq+0xd3/0x120 kernel/locking/spinlock.c:170
 put_pwq_unlocked+0x42/0x190 kernel/workqueue.c:1662
 destroy_workqueue+0x99d/0xc40 kernel/workqueue.c:5883
 xfs_destroy_mount_workqueues+0xd3/0x100 fs/xfs/xfs_super.c:605
 xfs_fs_put_super+0x13a/0x150 fs/xfs/xfs_super.c:1152
 generic_shutdown_super+0x139/0x2d0 fs/super.c:642
 kill_block_super+0x44/0x90 fs/super.c:1696
 xfs_kill_sb+0x15/0x50 fs/xfs/xfs_super.c:2056
 deactivate_locked_super+0xc4/0x130 fs/super.c:473
 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373
 task_work_run+0x24f/0x310 kernel/task_work.c:228
 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+0x168/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa6f997f327
Code: a8 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 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fff96927f68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fa6f997f327
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff96928020
RBP: 00007fff96928020 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff969290a0
R13: 00007fa6f99f0134 R14: 0000000000026639 R15: 00007fff969290e0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0x69/0x2050 kernel/locking/lockdep.c:5065
Code: b6 04 30 84 c0 0f 85 9b 16 00 00 45 31 f6 83 3d f8 a7 ab 0e 00 0f 84 b6 13 00 00 89 54 24 54 89 5c 24 68 4c 89 f8 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 ff e8 b9 2b 8b 00 48 be 00 00 00 00 00 fc
RSP: 0000:ffffc90004247970 EFLAGS: 00010002
RAX: 001ffff110170e7f RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 00ffff8880b873f9
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff2037a4e R12: ffff8880617c0000
R13: 0000000000000001 R14: 0000000000000000 R15: 00ffff8880b873f9
FS:  00005555724f4500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe0c1d37a8c CR3: 0000000061f58000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	b6 04                	mov    $0x4,%dh
   2:	30 84 c0 0f 85 9b 16 	xor    %al,0x169b850f(%rax,%rax,8)
   9:	00 00                	add    %al,(%rax)
   b:	45 31 f6             	xor    %r14d,%r14d
   e:	83 3d f8 a7 ab 0e 00 	cmpl   $0x0,0xeaba7f8(%rip)        # 0xeaba80d
  15:	0f 84 b6 13 00 00    	je     0x13d1
  1b:	89 54 24 54          	mov    %edx,0x54(%rsp)
  1f:	89 5c 24 68          	mov    %ebx,0x68(%rsp)
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 30 00          	cmpb   $0x0,(%rax,%rsi,1) <-- trapping instruction
  2e:	74 12                	je     0x42
  30:	4c 89 ff             	mov    %r15,%rdi
  33:	e8 b9 2b 8b 00       	call   0x8b2bf1
  38:	48                   	rex.W
  39:	be 00 00 00 00       	mov    $0x0,%esi
  3e:	00 fc                	add    %bh,%ah


---
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