syzbot


general protection fault in put_pwq_unlocked

Status: upstream: reported on 2024/05/21 12:03
Subsystems: btrfs
[Documentation on labels]
Reported-by: syzbot+bce6ef1d850c98d6d157@syzkaller.appspotmail.com
First crash: 36d, last: 10d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [btrfs?] general protection fault in put_pwq_unlocked 0 (1) 2024/05/21 12:03

Sample crash report:
BTRFS info (device loop3): last unmount of filesystem a6a605fc-d5f1-4e66-8595-3726e2b761d6
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: 1 PID: 5112 Comm: syz-executor.3 Not tainted 6.10.0-rc2-syzkaller-00010-g2ab795141095 #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 88 f1 39 0e 00 0f 84 1c 11 00 00 83 3d ff ad ad 0c 00 74 2c 4c 89 e0 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 e7 e8 68 31 86 00 48 be 00 00 00 00 00 fc
RSP: 0018:ffffc90003eef790 EFLAGS: 00010002
RAX: 001ffff11002a143 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 00ffff8880150a18
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff1f5833e R12: 00ffff8880150a18
R13: 0000000000000001 R14: ffff888061f9bc00 R15: 0000000000000000
FS:  000055556937e480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffc1f63a5c CR3: 000000006276a000 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+0x99d/0xc40 kernel/workqueue.c:5851
 btrfs_destroy_workqueue+0x45/0x260 fs/btrfs/async-thread.c:360
 btrfs_stop_all_workers+0x218/0x2a0 fs/btrfs/disk-io.c:1802
 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:2096
 deactivate_locked_super+0xc4/0x130 fs/super.c:473
 cleanup_mnt+0x41f/0x4b0 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+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f53c0a7e217
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:00007fffc1f63a48 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f53c0a7e217
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fffc1f63b00
RBP: 00007fffc1f63b00 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fffc1f64bb0
R13: 00007f53c0ad9636 R14: 00007f53c0acad68 R15: 000000000000000a
 </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 88 f1 39 0e 00 0f 84 1c 11 00 00 83 3d ff ad ad 0c 00 74 2c 4c 89 e0 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 e7 e8 68 31 86 00 48 be 00 00 00 00 00 fc
RSP: 0018:ffffc90003eef790 EFLAGS: 00010002
RAX: 001ffff11002a143 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 00ffff8880150a18
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff1f5833e R12: 00ffff8880150a18
R13: 0000000000000001 R14: ffff888061f9bc00 R15: 0000000000000000
FS:  000055556937e480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffc1f63a5c CR3: 000000006276a000 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 88 f1 39 0e 00 	cmpl   $0x0,0xe39f188(%rip)        # 0xe39f19c
  14:	0f 84 1c 11 00 00    	je     0x1136
  1a:	83 3d ff ad ad 0c 00 	cmpl   $0x0,0xcadadff(%rip)        # 0xcadae20
  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 68 31 86 00       	call   0x8631a0
  38:	48                   	rex.W
  39:	be 00 00 00 00       	mov    $0x0,%esi
  3e:	00 fc                	add    %bh,%ah

Crashes (7):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/04 15:16 upstream 2ab795141095 11f2afa5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in put_pwq_unlocked
2024/05/21 12:00 upstream 8f6a15f095a6 4c0d3ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in put_pwq_unlocked
2024/05/20 13:09 upstream eb6a9339efeb c0f1611a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in put_pwq_unlocked
2024/05/13 14:41 upstream a38297e3fb01 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in put_pwq_unlocked
2024/05/10 03:44 upstream 448b3fe5a0ea de979bc2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in put_pwq_unlocked
2024/05/09 21:38 upstream 45db3ab70092 de979bc2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in put_pwq_unlocked
2024/05/28 04:20 linux-next 3689b0ef08b7 f550015e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in put_pwq_unlocked
* Struck through repros no longer work on HEAD.