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

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Date: Tue, 21 May 2024 05:03:03 -0700
From: syzbot <syzbot+bce6ef1d850c98d6d157@...kaller.appspotmail.com>
To: clm@...com, dsterba@...e.com, josef@...icpanda.com, 
	linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [btrfs?] general protection fault in put_pwq_unlocked

Hello,

syzbot found the following issue on:

HEAD commit:    8f6a15f095a6 Merge tag 'cocci-for-6.10' of git://git.kerne..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1736b784980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=6be91306a8917025
dashboard link: https://syzkaller.appspot.com/bug?extid=bce6ef1d850c98d6d157
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/f30c87f89d17/disk-8f6a15f0.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3d73f0e35e13/vmlinux-8f6a15f0.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3d524f6fb25b/bzImage-8f6a15f0.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+bce6ef1d850c98d6d157@...kaller.appspotmail.com

BTRFS info (device loop3): last unmount of filesystem c9fe44da-de57-406a-8241-57ec7d4412cf
Oops: general protection fault, probably for non-canonical address 0xe01ffbf11002a143: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: maybe wild-memory-access in range [0x00ffff8880150a18-0x00ffff8880150a1f]
CPU: 0 PID: 8186 Comm: syz-executor.3 Not tainted 6.9.0-syzkaller-10323-g8f6a15f095a6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:__lock_acquire+0x6a/0x1fd0 kernel/locking/lockdep.c:5005
Code: df 0f b6 04 30 84 c0 0f 85 4b 16 00 00 83 3d 28 c3 39 0e 00 0f 84 1c 11 00 00 83 3d 5f 8b ad 0c 00 74 2c 4c 89 e0 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 e7 e8 c8 42 86 00 48 be 00 00 00 00 00 fc
RSP: 0000:ffffc900041bf790 EFLAGS: 00010002
RAX: 001ffff11002a143 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 00ffff8880150a18
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff1f5818e R12: 00ffff8880150a18
R13: 0000000000000001 R14: ffff88802658da00 R15: 0000000000000000
FS:  00005555668d4480(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6558b0b000 CR3: 0000000067b3c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754
 __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+0x9a4/0xc40 kernel/workqueue.c:5851
 btrfs_destroy_workqueue+0x45/0x260 fs/btrfs/async-thread.c:360
 btrfs_stop_all_workers+0x15a/0x2a0 fs/btrfs/disk-io.c:1797
 close_ctree+0x67d/0xd20 fs/btrfs/disk-io.c:4365
 generic_shutdown_super+0x136/0x2d0 fs/super.c:642
 kill_anon_super+0x3b/0x70 fs/super.c:1226
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2088
 deactivate_locked_super+0xc4/0x130 fs/super.c:473
 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1267
 task_work_run+0x24f/0x310 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+0x168/0x370 kernel/entry/common.c:218
 do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff305e7e217
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:00007fff1d9a1428 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007ff305e7e217
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff1d9a14e0
RBP: 00007fff1d9a14e0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff1d9a25a0
R13: 00007ff305ec8336 R14: 00000000000507f7 R15: 0000000000000006
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0x6a/0x1fd0 kernel/locking/lockdep.c:5005
Code: df 0f b6 04 30 84 c0 0f 85 4b 16 00 00 83 3d 28 c3 39 0e 00 0f 84 1c 11 00 00 83 3d 5f 8b ad 0c 00 74 2c 4c 89 e0 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 e7 e8 c8 42 86 00 48 be 00 00 00 00 00 fc
RSP: 0000:ffffc900041bf790 EFLAGS: 00010002
RAX: 001ffff11002a143 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 00ffff8880150a18
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff1f5818e R12: 00ffff8880150a18
R13: 0000000000000001 R14: ffff88802658da00 R15: 0000000000000000
FS:  00005555668d4480(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6558b0b000 CR3: 0000000067b3c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	df 0f                	fisttps (%rdi)
   2:	b6 04                	mov    $0x4,%dh
   4:	30 84 c0 0f 85 4b 16 	xor    %al,0x164b850f(%rax,%rax,8)
   b:	00 00                	add    %al,(%rax)
   d:	83 3d 28 c3 39 0e 00 	cmpl   $0x0,0xe39c328(%rip)        # 0xe39c33c
  14:	0f 84 1c 11 00 00    	je     0x1136
  1a:	83 3d 5f 8b ad 0c 00 	cmpl   $0x0,0xcad8b5f(%rip)        # 0xcad8b80
  21:	74 2c                	je     0x4f
  23:	4c 89 e0             	mov    %r12,%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 e7             	mov    %r12,%rdi
  33:	e8 c8 42 86 00       	call   0x864300
  38:	48                   	rex.W
  39:	be 00 00 00 00       	mov    $0x0,%esi
  3e:	00 fc                	add    %bh,%ah


---
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