loop0: detected capacity change from 0 to 32768
ocfs2: Readonly device (7,0) detected. Cluster services will not be used for this mount. Recovery will be skipped.
ocfs2: Mounting device (7,0) on (node local, slot 65535) with ordered data mode.
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(lock->magic != lock)
WARNING: kernel/locking/mutex.c:593 at __mutex_lock_common kernel/locking/mutex.c:593 [inline], CPU#0: syz.0.0/5341
WARNING: kernel/locking/mutex.c:593 at __mutex_lock+0x10d5/0x1350 kernel/locking/mutex.c:776, CPU#0: syz.0.0/5341
Modules linked in:
CPU: 0 UID: 0 PID: 5341 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~bpo12+1 04/01/2014
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:593 [inline]
RIP: 0010:__mutex_lock+0x10dc/0x1350 kernel/locking/mutex.c:776
Code: 82 8f 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 48 02 00 00 83 3d c8 55 25 04 00 75 13 48 8d 3d cb 5e 28 04 48 c7 c6 60 1a 6b 8b <67> 48 0f b9 3a 90 e9 6b f0 ff ff 90 0f 0b 90 e9 51 f4 ff ff 90 0f
RSP: 0018:ffffc9000d20f760 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffc9000d20f840 RCX: 0000000000100000
RDX: ffffc90020a21000 RSI: ffffffff8b6b1a60 RDI: ffffffff8f857fb0
RBP: ffffc9000d20f920 R08: ffffffff8f8276a3 R09: 1ffffffff1f04ed4
R10: dffffc0000000000 R11: fffffbfff1f04ed5 R12: ffff88803e840df0
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f57f78816c0(0000) GS:ffff88808d414000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a97e390e70 CR3: 000000004137b000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_trim_fs_lock_res_init+0x33/0x1c0 fs/ocfs2/dlmglue.c:703
 ocfs2_trim_fs+0x129/0x2300 fs/ocfs2/alloc.c:7683
 ocfs2_ioctl+0x694/0x750 fs/ocfs2/ioctl.c:932
 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+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f57f698f7c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f57f7881038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f57f6be5fa0 RCX: 00007f57f698f7c9
RDX: 0000200000000080 RSI: 00000000c0185879 RDI: 0000000000000005
RBP: 00007f57f6a13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f57f6be6038 R14: 00007f57f6be5fa0 R15: 00007ffef434d268
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	48 c1 e8 03          	shr    $0x3,%rax
   4:	42 0f b6 04 28       	movzbl (%rax,%r13,1),%eax
   9:	84 c0                	test   %al,%al
   b:	0f 85 48 02 00 00    	jne    0x259
  11:	83 3d c8 55 25 04 00 	cmpl   $0x0,0x42555c8(%rip)        # 0x42555e0
  18:	75 13                	jne    0x2d
  1a:	48 8d 3d cb 5e 28 04 	lea    0x4285ecb(%rip),%rdi        # 0x4285eec
  21:	48 c7 c6 60 1a 6b 8b 	mov    $0xffffffff8b6b1a60,%rsi
* 28:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2d:	90                   	nop
  2e:	e9 6b f0 ff ff       	jmp    0xfffff09e
  33:	90                   	nop
  34:	0f 0b                	ud2
  36:	90                   	nop
  37:	e9 51 f4 ff ff       	jmp    0xfffff48d
  3c:	90                   	nop
  3d:	0f                   	.byte 0xf