------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(lock->magic != lock)
WARNING: kernel/locking/mutex.c:625 at __mutex_lock_common kernel/locking/mutex.c:625 [inline], CPU#0: syz.0.0/5326
WARNING: kernel/locking/mutex.c:625 at __mutex_lock+0x12d8/0x1550 kernel/locking/mutex.c:821, CPU#0: syz.0.0/5326
Modules linked in:
CPU: 0 UID: 0 PID: 5326 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:625 [inline]
RIP: 0010:__mutex_lock+0x12df/0x1550 kernel/locking/mutex.c:821
Code: e7 57 90 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 47 02 00 00 83 3d 45 f5 81 04 00 75 13 48 8d 3d c8 44 85 04 48 c7 c6 40 f7 ec 8b <67> 48 0f b9 3a 90 e9 75 ee ff ff 90 0f 0b 90 e9 48 f2 ff ff 90 0f
RSP: 0018:ffffc9000daff780 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff88801ae1ca80
RDX: 0000000000000000 RSI: ffffffff8becf740 RDI: ffffffff905b36d0
RBP: ffffc9000daff920 R08: ffffffff9057e743 R09: 1ffffffff20afce8
R10: dffffc0000000000 R11: fffffbfff20afce9 R12: ffff8880363f4de0
R13: 0000000000000000 R14: 1ffff92001b5ff04 R15: 0000000000000000
FS:  00007ff8e1c536c0(0000) GS:ffff88808c53e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7465c23000 CR3: 0000000043dfd000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_trim_fs_lock_res_init+0x33/0x1c0 fs/ocfs2/dlmglue.c:703
 ocfs2_trim_fs+0x13c/0x24d0 fs/ocfs2/alloc.c:7692
 ocfs2_ioctl+0x6bf/0x7e0 fs/ocfs2/ioctl.c:948
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 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: 0033:0x7ff8e0d9e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007ff8e1c52fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff8e1026090 RCX: 00007ff8e0d9e0d9
RDX: 0000200000000000 RSI: 00000000c0185879 RDI: 0000000000000007
RBP: 00007ff8e0e35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff8e1026128 R14: 00007ff8e1026090 R15: 00007ffeb0a3c0e8
 </TASK>
----------------
Code disassembly (best guess):
   0:	e7 57                	out    %eax,$0x57
   2:	90                   	nop
   3:	48 c1 e8 03          	shr    $0x3,%rax
   7:	0f b6 04 18          	movzbl (%rax,%rbx,1),%eax
   b:	84 c0                	test   %al,%al
   d:	0f 85 47 02 00 00    	jne    0x25a
  13:	83 3d 45 f5 81 04 00 	cmpl   $0x0,0x481f545(%rip)        # 0x481f55f
  1a:	75 13                	jne    0x2f
  1c:	48 8d 3d c8 44 85 04 	lea    0x48544c8(%rip),%rdi        # 0x48544eb
  23:	48 c7 c6 40 f7 ec 8b 	mov    $0xffffffff8becf740,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	90                   	nop
  30:	e9 75 ee ff ff       	jmp    0xffffeeaa
  35:	90                   	nop
  36:	0f 0b                	ud2
  38:	90                   	nop
  39:	e9 48 f2 ff ff       	jmp    0xfffff286
  3e:	90                   	nop
  3f:	0f                   	.byte 0xf