BTRFS info (device loop3): first mount of filesystem a4d06b90-61a4-49cd-bf5f-2183c3574322
BTRFS info (device loop3): using blake2b checksum algorithm
------------[ cut here ]------------
workqueue: btrfs-qgroup-rescan uses both WQ_PERCPU and WQ_UNBOUND. Dropped WQ_PERCPU, keeping WQ_UNBOUND.
WARNING: kernel/workqueue.c:5860 at __alloc_workqueue+0x1d0d/0x2060 kernel/workqueue.c:5859, CPU#0: syz.3.6/5812
Modules linked in:
CPU: 0 UID: 0 PID: 5812 Comm: syz.3.6 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:__alloc_workqueue+0x1d10/0x2060 kernel/workqueue.c:5859
Code: 00 48 8d 3d a2 43 02 0e 4c 89 f6 67 48 0f b9 3a 81 cd 00 01 00 00 e9 ae e5 ff ff e8 ba 78 37 00 48 8d 3d 93 43 02 0e 4c 89 f6 <67> 48 0f b9 3a 81 e5 ff fe ff ff e9 8f e5 ff ff e8 9b 78 37 00 90
RSP: 0000:ffffc90005c6f7a8 EFLAGS: 00010283
RAX: ffffffff818d9e96 RBX: 0000000000000102 RCX: 0000000000080000
RDX: ffffc900065a1000 RSI: ffff888035161968 RDI: ffffffff8f8fe230
RBP: 000000000002010e R08: ffff88802f289f00 R09: 0000000000000002
R10: 0000000000000100 R11: 0000000000000102 R12: ffffc90005c6f8c0
R13: ffff888035161800 R14: ffff888035161968 R15: 0000000000000001
FS:  00007f32fb83e6c0(0000) GS:ffff888125ece000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe6d206e008 CR3: 000000002aa42000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 alloc_workqueue_va kernel/workqueue.c:5950 [inline]
 alloc_workqueue_noprof+0xe3/0x210 kernel/workqueue.c:5966
 btrfs_alloc_ordered_workqueue+0x1c3/0x290 fs/btrfs/async-thread.c:140
 btrfs_init_workqueues+0x345/0x630 fs/btrfs/disk-io.c:1985
 open_ctree+0x1503/0x41c0 fs/btrfs/disk-io.c:3523
 btrfs_fill_super fs/btrfs/super.c:982 [inline]
 btrfs_get_tree_super fs/btrfs/super.c:1971 [inline]
 btrfs_get_tree_subvol fs/btrfs/super.c:2114 [inline]
 btrfs_get_tree+0x1084/0x1980 fs/btrfs/super.c:2148
 vfs_get_tree+0x92/0x2a0 fs/super.c:1694
 fc_mount fs/namespace.c:1198 [inline]
 do_new_mount_fc fs/namespace.c:3765 [inline]
 do_new_mount+0x319/0xdc0 fs/namespace.c:3841
 do_mount fs/namespace.c:4174 [inline]
 __do_sys_mount fs/namespace.c:4390 [inline]
 __se_sys_mount+0x31d/0x420 fs/namespace.c:4367
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f32fd5ee0ca
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f32fb83de58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f32fb83dee0 RCX: 00007f32fd5ee0ca
RDX: 00002000000055c0 RSI: 0000200000005600 RDI: 00007f32fb83dea0
RBP: 00002000000055c0 R08: 00007f32fb83dee0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000005600
R13: 00007f32fb83dea0 R14: 00000000000055a4 R15: 0000200000005640
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 48 8d             	add    %cl,-0x73(%rax)
   3:	3d a2 43 02 0e       	cmp    $0xe0243a2,%eax
   8:	4c 89 f6             	mov    %r14,%rsi
   b:	67 48 0f b9 3a       	ud1    (%edx),%rdi
  10:	81 cd 00 01 00 00    	or     $0x100,%ebp
  16:	e9 ae e5 ff ff       	jmp    0xffffe5c9
  1b:	e8 ba 78 37 00       	call   0x3778da
  20:	48 8d 3d 93 43 02 0e 	lea    0xe024393(%rip),%rdi        # 0xe0243ba
  27:	4c 89 f6             	mov    %r14,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	81 e5 ff fe ff ff    	and    $0xfffffeff,%ebp
  35:	e9 8f e5 ff ff       	jmp    0xffffe5c9
  3a:	e8 9b 78 37 00       	call   0x3778da
  3f:	90                   	nop