syzbot

------------[ cut here ]------------
BTRFS: Transaction aborted (error -2)
WARNING: fs/btrfs/extent-tree.c:3105 at do_free_extent_accounting fs/btrfs/extent-tree.c:3105 [inline], CPU#0: syz-executor/5966
WARNING: fs/btrfs/extent-tree.c:3105 at __btrfs_free_extent+0x3a28/0x4350 fs/btrfs/extent-tree.c:3474, CPU#0: syz-executor/5966
Modules linked in:
CPU: 0 UID: 0 PID: 5966 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:do_free_extent_accounting fs/btrfs/extent-tree.c:3105 [inline]
RIP: 0010:__btrfs_free_extent+0x3a2b/0x4350 fs/btrfs/extent-tree.c:3474
Code: c0 05 00 00 e8 26 2e ce fd 84 c0 0f 84 f3 00 00 00 e8 59 28 e9 fd e9 a9 05 00 00 e8 4f 28 e9 fd 48 8d 3d d8 b0 97 0b 44 89 ee <67> 48 0f b9 3a e9 af e2 ff ff e8 36 28 e9 fd eb 05 e8 2f 28 e9 fd
RSP: 0018:ffffc90004777440 EFLAGS: 00010293
RAX: ffffffff83db2421 RBX: ffff8880457f0fd8 RCX: ffff888024fcbd00
RDX: 0000000000000000 RSI: 00000000fffffffe RDI: ffffffff8f72d500
RBP: ffffc900047775f0 R08: ffff888024fcbd00 R09: 0000000000000003
R10: 0000000000000100 R11: 00000000fffffffb R12: ffff88804cbd88f0
R13: 00000000fffffffe R14: 0000000000000000 R15: ffff88803acec001
FS:  0000555583976500(0000) GS:ffff888126340000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555583991a28 CR3: 0000000034368000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 run_one_delayed_ref fs/btrfs/extent-tree.c:-1 [inline]
 btrfs_run_delayed_refs_for_head fs/btrfs/extent-tree.c:2003 [inline]
 __btrfs_run_delayed_refs+0x15e7/0x4240 fs/btrfs/extent-tree.c:2078
 btrfs_run_delayed_refs+0xe6/0x3b0 fs/btrfs/extent-tree.c:2190
 btrfs_commit_transaction+0xfb6/0x31a0 fs/btrfs/transaction.c:2457
 sync_filesystem+0x1ce/0x250 fs/sync.c:66
 generic_shutdown_super+0x77/0x2d0 fs/super.c:625
 kill_anon_super+0x3b/0x70 fs/super.c:1292
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2127
 deactivate_locked_super+0xbc/0x130 fs/super.c:476
 cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
 exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1fe280d9d7
Code: a2 c7 05 1c ed 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 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 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd1dd4fc48 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f1fe28a1f90 RCX: 00007f1fe280d9d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd1dd4fd00
RBP: 00007ffd1dd4fd00 R08: 00007ffd1dd50d00 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd1dd50d90
R13: 00007f1fe28a1f90 R14: 000000000001be23 R15: 00007ffd1dd50dd0
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	05 00 00 e8 26       	add    $0x26e80000,%eax
   5:	2e ce                	cs (bad)
   7:	fd                   	std
   8:	84 c0                	test   %al,%al
   a:	0f 84 f3 00 00 00    	je     0x103
  10:	e8 59 28 e9 fd       	call   0xfde9286e
  15:	e9 a9 05 00 00       	jmp    0x5c3
  1a:	e8 4f 28 e9 fd       	call   0xfde9286e
  1f:	48 8d 3d d8 b0 97 0b 	lea    0xb97b0d8(%rip),%rdi        # 0xb97b0fe
  26:	44 89 ee             	mov    %r13d,%esi
* 29:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2e:	e9 af e2 ff ff       	jmp    0xffffe2e2
  33:	e8 36 28 e9 fd       	call   0xfde9286e
  38:	eb 05                	jmp    0x3f
  3a:	e8 2f 28 e9 fd       	call   0xfde9286e