loop0: detected capacity change from 0 to 32768
=======================================================
WARNING: The mand mount option has been deprecated and
         and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
ocfs2: Slot 0 on device (7,0) was already allocated to this node!
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 UID: 0 PID: 5317 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:ocfs2_find_dir_space_id fs/ocfs2/dir.c:3432 [inline]
RIP: 0010:ocfs2_prepare_dir_for_insert+0x2f41/0x5450 fs/ocfs2/dir.c:4296
Code: aa 8b e8 22 9b 19 00 e9 fd 11 00 00 e8 68 19 1e fe e9 a7 02 00 00 e8 5e 19 1e fe 49 8d 7f 08 4d 8d 77 09 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 41 20 00 00 4c 89 f0 48 c1 e8 03 42 0f
RSP: 0018:ffffc9000fd5f080 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff888042e1de48 RCX: 0000000000100000
RDX: ffffc9000dd52000 RSI: 0000000000000734 RDI: 0000000000000008
RBP: ffffc9000fd5f790 R08: ffffffff8f7d0f77 R09: 1ffffffff1efa1ee
R10: dffffc0000000000 R11: fffffbfff1efa1ef R12: dffffc0000000000
R13: ffff888042e1ddf8 R14: 0000000000000009 R15: 0000000000000000
FS:  00007fd32bded6c0(0000) GS:ffff88808d72f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd32fbdc338 CR3: 000000003f644000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __ocfs2_prepare_orphan_dir+0x145/0x2c0 fs/ocfs2/namei.c:2179
 ocfs2_prepare_orphan_dir+0xf9/0x3f0 fs/ocfs2/namei.c:2224
 ocfs2_unlink+0x90d/0x1940 fs/ocfs2/namei.c:962
 vfs_rmdir+0x3ba/0x520 fs/namei.c:4548
 do_rmdir+0x25f/0x550 fs/namei.c:4603
 __do_sys_rmdir fs/namei.c:4622 [inline]
 __se_sys_rmdir fs/namei.c:4620 [inline]
 __x64_sys_rmdir+0x47/0x50 fs/namei.c:4620
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd32f98f749
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:00007fd32bded038 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 00007fd32fbe5fa0 RCX: 00007fd32f98f749
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000040
RBP: 00007fd32fa13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd32fbe6038 R14: 00007fd32fbe5fa0 R15: 00007ffcd96a1a68
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_find_dir_space_id fs/ocfs2/dir.c:3432 [inline]
RIP: 0010:ocfs2_prepare_dir_for_insert+0x2f41/0x5450 fs/ocfs2/dir.c:4296
Code: aa 8b e8 22 9b 19 00 e9 fd 11 00 00 e8 68 19 1e fe e9 a7 02 00 00 e8 5e 19 1e fe 49 8d 7f 08 4d 8d 77 09 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 41 20 00 00 4c 89 f0 48 c1 e8 03 42 0f
RSP: 0018:ffffc9000fd5f080 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff888042e1de48 RCX: 0000000000100000
RDX: ffffc9000dd52000 RSI: 0000000000000734 RDI: 0000000000000008
RBP: ffffc9000fd5f790 R08: ffffffff8f7d0f77 R09: 1ffffffff1efa1ee
R10: dffffc0000000000 R11: fffffbfff1efa1ef R12: dffffc0000000000
R13: ffff888042e1ddf8 R14: 0000000000000009 R15: 0000000000000000
FS:  00007fd32bded6c0(0000) GS:ffff88808d72f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd323e75000 CR3: 000000003f644000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
   0:	aa                   	stos   %al,%es:(%rdi)
   1:	8b e8                	mov    %eax,%ebp
   3:	22 9b 19 00 e9 fd    	and    -0x216ffe7(%rbx),%bl
   9:	11 00                	adc    %eax,(%rax)
   b:	00 e8                	add    %ch,%al
   d:	68 19 1e fe e9       	push   $0xffffffffe9fe1e19
  12:	a7                   	cmpsl  %es:(%rdi),%ds:(%rsi)
  13:	02 00                	add    (%rax),%al
  15:	00 e8                	add    %ch,%al
  17:	5e                   	pop    %rsi
  18:	19 1e                	sbb    %ebx,(%rsi)
  1a:	fe 49 8d             	decb   -0x73(%rcx)
  1d:	7f 08                	jg     0x27
  1f:	4d 8d 77 09          	lea    0x9(%r15),%r14
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 20       	movzbl (%rax,%r12,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 41 20 00 00    	jne    0x2078
  37:	4c 89 f0             	mov    %r14,%rax
  3a:	48 c1 e8 03          	shr    $0x3,%rax
  3e:	42                   	rex.X
  3f:	0f                   	.byte 0xf