------------[ cut here ]------------
kernel BUG at fs/ocfs2/uptodate.c:509!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5331 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_set_new_buffer_uptodate+0x149/0x170 fs/ocfs2/uptodate.c:509
Code: 80 3c 20 00 74 08 4c 89 f7 e8 c3 ff 71 fe 4d 8b 1e 48 89 df 5b 41 5c 41 5d 41 5e 41 5f 5d 41 ff e3 cc cc cc e8 b8 c0 0a fe 90 <0f> 0b e8 b0 c0 0a fe 90 0f 0b e8 a8 c0 0a fe 90 0f 0b e8 a0 c0 0a
RSP: 0018:ffffc9000fbf69a8 EFLAGS: 00010287
RAX: ffffffff83b55578 RBX: ffff888051418830 RCX: 0000000000100000
RDX: ffffc9000e39b000 RSI: 0000000000001a4f RDI: 0000000000001a50
RBP: 0000000000000001 R08: ffffffff8f7cfb77 R09: 1ffffffff1ef9f6e
R10: dffffc0000000000 R11: fffffbfff1ef9f6f R12: 1ffff92001f7ed68
R13: dffffc0000000000 R14: ffff88804328d910 R15: ffff88804328d910
FS:  00007ff51b0b26c0(0000) GS:ffff88808d732000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000190c0 CR3: 0000000011add000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_extend_dir+0x1172/0x4870 fs/ocfs2/dir.c:3309
 ocfs2_prepare_dx_dir_for_insert fs/ocfs2/dir.c:4232 [inline]
 ocfs2_prepare_dir_for_insert+0x3d7b/0x5450 fs/ocfs2/dir.c:4288
 ocfs2_mknod+0x819/0x2050 fs/ocfs2/namei.c:297
 ocfs2_create+0x1a5/0x440 fs/ocfs2/namei.c:676
 vfs_create+0x24e/0x400 fs/namei.c:3493
 do_mknodat+0x3c6/0x4d0 fs/namei.c:4372
 __do_sys_mknod fs/namei.c:4405 [inline]
 __se_sys_mknod fs/namei.c:4403 [inline]
 __x64_sys_mknod+0x8c/0xa0 fs/namei.c:4403
 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: 0033:0x7ff51a18f6c9
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:00007ff51b0b2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007ff51a3e6090 RCX: 00007ff51a18f6c9
RDX: 0000000000000700 RSI: 0000000000000fff RDI: 00002000000190c0
RBP: 00007ff51a211f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff51a3e6128 R14: 00007ff51a3e6090 R15: 00007fff613feb28
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_set_new_buffer_uptodate+0x149/0x170 fs/ocfs2/uptodate.c:509
Code: 80 3c 20 00 74 08 4c 89 f7 e8 c3 ff 71 fe 4d 8b 1e 48 89 df 5b 41 5c 41 5d 41 5e 41 5f 5d 41 ff e3 cc cc cc e8 b8 c0 0a fe 90 <0f> 0b e8 b0 c0 0a fe 90 0f 0b e8 a8 c0 0a fe 90 0f 0b e8 a0 c0 0a
RSP: 0018:ffffc9000fbf69a8 EFLAGS: 00010287
RAX: ffffffff83b55578 RBX: ffff888051418830 RCX: 0000000000100000
RDX: ffffc9000e39b000 RSI: 0000000000001a4f RDI: 0000000000001a50
RBP: 0000000000000001 R08: ffffffff8f7cfb77 R09: 1ffffffff1ef9f6e
R10: dffffc0000000000 R11: fffffbfff1ef9f6f R12: 1ffff92001f7ed68
R13: dffffc0000000000 R14: ffff88804328d910 R15: ffff88804328d910
FS:  00007ff51b0b26c0(0000) GS:ffff88808d732000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7b52722fb3 CR3: 0000000011add000 CR4: 0000000000352ef0