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: Mounting device (7,0) on (node local, slot 0) with writeback data mode.
------------[ cut here ]------------
kernel BUG at fs/ocfs2/uptodate.c:509!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5354 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 13 01 75 fe 4d 8b 1e 48 89 df 5b 41 5c 41 5d 41 5e 41 5f 5d 2e e9 e9 5f 50 1c e8 58 16 10 fe 90 <0f> 0b e8 50 16 10 fe 90 0f 0b e8 48 16 10 fe 90 0f 0b e8 40 16 10
RSP: 0018:ffffc9000d30ebc8 EFLAGS: 00010283
RAX: ffffffff83afa4d8 RBX: ffff888043730830 RCX: 0000000000100000
RDX: ffffc9000ddfa000 RSI: 0000000000001dd2 RDI: 0000000000001dd3
RBP: 0000000000000001 R08: ffffffff8fa3a737 R09: 1ffffffff1f474e6
R10: dffffc0000000000 R11: fffffbfff1f474e7 R12: 1ffff92001a61dac
R13: dffffc0000000000 R14: ffff8880437c2bc8 R15: ffff8880437c2bc8
FS:  00007f51b83e86c0(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f51ac7bd000 CR3: 0000000043d63000 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_link+0x95a/0x18a0 fs/ocfs2/namei.c:760
 vfs_link+0x4ea/0x6e0 fs/namei.c:4854
 do_linkat+0x272/0x560 fs/namei.c:4924
 __do_sys_link fs/namei.c:4958 [inline]
 __se_sys_link fs/namei.c:4956 [inline]
 __x64_sys_link+0x82/0x90 fs/namei.c:4956
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f51b758ebe9
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:00007f51b83e8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007f51b77b5fa0 RCX: 00007f51b758ebe9
RDX: 0000000000000000 RSI: 0000200000000bc0 RDI: 0000200000001240
RBP: 00007f51b7611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f51b77b6038 R14: 00007f51b77b5fa0 R15: 00007ffe91d3c348
 </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 13 01 75 fe 4d 8b 1e 48 89 df 5b 41 5c 41 5d 41 5e 41 5f 5d 2e e9 e9 5f 50 1c e8 58 16 10 fe 90 <0f> 0b e8 50 16 10 fe 90 0f 0b e8 48 16 10 fe 90 0f 0b e8 40 16 10
RSP: 0018:ffffc9000d30ebc8 EFLAGS: 00010283
RAX: ffffffff83afa4d8 RBX: ffff888043730830 RCX: 0000000000100000
RDX: ffffc9000ddfa000 RSI: 0000000000001dd2 RDI: 0000000000001dd3
RBP: 0000000000000001 R08: ffffffff8fa3a737 R09: 1ffffffff1f474e6
R10: dffffc0000000000 R11: fffffbfff1f474e7 R12: 1ffff92001a61dac
R13: dffffc0000000000 R14: ffff8880437c2bc8 R15: ffff8880437c2bc8
FS:  00007f51b83e86c0(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f51b83c6fc8 CR3: 0000000043d63000 CR4: 0000000000352ef0