syzbot

         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/aops.c:1180!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5930 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:ocfs2_write_cluster fs/ocfs2/aops.c:1180 [inline]
RIP: 0010:ocfs2_write_cluster_by_desc+0x1c75/0x1ca0 fs/ocfs2/aops.c:1241
Code: 4c 8b 03 48 8d bc 24 10 02 00 00 48 c7 c6 7e 53 62 8c ba 7f 04 00 00 48 c7 c1 00 90 e9 8a e8 92 3b 1a 00 0f 0b e8 2b 20 39 fe <0f> 0b e8 24 20 39 fe 0f 0b e8 1d 20 39 fe 0f 0b e8 16 20 39 fe 0f
RSP: 0018:ffffc9000433eec0 EFLAGS: 00010293
RAX: ffffffff834c7095 RBX: ffff888027efa014 RCX: ffff888027bfbc00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000433f1f0 R08: ffff8880601d8723 R09: 1ffff1100c03b0e4
R10: dffffc0000000000 R11: ffffed100c03b0e5 R12: ffff88807ba38000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888027efa014
FS:  000055558b0e1500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6bf47bd000 CR3: 000000007773c000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 ocfs2_write_begin_nolock+0x2fcb/0x4190 fs/ocfs2/aops.c:1817
 ocfs2_write_begin+0x1bc/0x310 fs/ocfs2/aops.c:1904
 generic_perform_write+0x2fb/0x5b0 mm/filemap.c:4031
 ocfs2_file_write_iter+0x1582/0x1d00 fs/ocfs2/file.c:2468
 call_write_iter include/linux/fs.h:2018 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x43b/0x940 fs/read_write.c:584
 ksys_write+0x147/0x250 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f6e90b8f749
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:00007ffd42d60ba8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6e90de5fa0 RCX: 00007f6e90b8f749
RDX: 000000000208e24b RSI: 0000200000000000 RDI: 0000000000000004
RBP: 00007f6e90c13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6e90de5fa0 R14: 00007f6e90de5fa0 R15: 0000000000000003
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_write_cluster fs/ocfs2/aops.c:1180 [inline]
RIP: 0010:ocfs2_write_cluster_by_desc+0x1c75/0x1ca0 fs/ocfs2/aops.c:1241
Code: 4c 8b 03 48 8d bc 24 10 02 00 00 48 c7 c6 7e 53 62 8c ba 7f 04 00 00 48 c7 c1 00 90 e9 8a e8 92 3b 1a 00 0f 0b e8 2b 20 39 fe <0f> 0b e8 24 20 39 fe 0f 0b e8 1d 20 39 fe 0f 0b e8 16 20 39 fe 0f
RSP: 0018:ffffc9000433eec0 EFLAGS: 00010293
RAX: ffffffff834c7095 RBX: ffff888027efa014 RCX: ffff888027bfbc00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000433f1f0 R08: ffff8880601d8723 R09: 1ffff1100c03b0e4
R10: dffffc0000000000 R11: ffffed100c03b0e5 R12: ffff88807ba38000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888027efa014
FS:  000055558b0e1500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6bf47bd000 CR3: 000000007773c000 CR4: 00000000003506e0