option from the mount to silence this warning. ======================================================= ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. ------------[ cut here ]------------ kernel BUG at fs/ocfs2/aops.c:1179! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5093 Comm: syz-executor394 Not tainted 6.11.0-syzkaller-02520-gadfc3ded5c33 #0 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_write_cluster fs/ocfs2/aops.c:1179 [inline] RIP: 0010:ocfs2_write_cluster_by_desc+0x1fc7/0x1ff0 fs/ocfs2/aops.c:1240 Code: 03 48 8d bc 24 30 02 00 00 48 c7 c6 77 b1 0b 8e ba 7e 04 00 00 48 c7 c1 00 ef 48 8c e8 92 93 1d 00 90 0f 0b e8 5a f1 12 fe 90 <0f> 0b e8 52 f1 12 fe 90 0f 0b e8 4a f1 12 fe 90 0f 0b e8 42 f1 12 RSP: 0018:ffffc90002c0ee20 EFLAGS: 00010293 RAX: ffffffff8380b546 RBX: ffff888042afc1a0 RCX: ffff88801e3e2440 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90002c0f170 R08: ffffffff83809cae R09: 1ffff1100855f804 R10: dffffc0000000000 R11: ffffed100855f805 R12: 0000000000000000 R13: ffff888041224000 R14: ffff888042afc178 R15: 0000000000000000 FS: 000055555ae8d380(0000) GS:ffff88801fe00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020201000 CR3: 00000000378be000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ocfs2_write_begin_nolock+0x3a2f/0x4ec0 fs/ocfs2/aops.c:1816 ocfs2_write_begin+0x205/0x3a0 fs/ocfs2/aops.c:1903 generic_perform_write+0x37e/0x730 mm/filemap.c:4025 ocfs2_file_write_iter+0x17b1/0x1f50 fs/ocfs2/file.c:2456 new_sync_write fs/read_write.c:590 [inline] vfs_write+0xa6d/0xc90 fs/read_write.c:683 ksys_write+0x1a0/0x2c0 fs/read_write.c:736 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f459d01dad9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd75106768 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f459d01dad9 RDX: 000000000208e24b RSI: 0000000020000240 RDI: 0000000000000004 RBP: 00007f459d0955f0 R08: 000055555ae8e4c0 R09: 000055555ae8e4c0 R10: 0000000000004428 R11: 0000000000000246 R12: 00007ffd75106790 R13: 00007ffd751069b8 R14: 431bde82d7b634db R15: 00007f459d06603b Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ocfs2_write_cluster fs/ocfs2/aops.c:1179 [inline] RIP: 0010:ocfs2_write_cluster_by_desc+0x1fc7/0x1ff0 fs/ocfs2/aops.c:1240 Code: 03 48 8d bc 24 30 02 00 00 48 c7 c6 77 b1 0b 8e ba 7e 04 00 00 48 c7 c1 00 ef 48 8c e8 92 93 1d 00 90 0f 0b e8 5a f1 12 fe 90 <0f> 0b e8 52 f1 12 fe 90 0f 0b e8 4a f1 12 fe 90 0f 0b e8 42 f1 12 RSP: 0018:ffffc90002c0ee20 EFLAGS: 00010293 RAX: ffffffff8380b546 RBX: ffff888042afc1a0 RCX: ffff88801e3e2440 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90002c0f170 R08: ffffffff83809cae R09: 1ffff1100855f804 R10: dffffc0000000000 R11: ffffed100855f805 R12: 0000000000000000 R13: ffff888041224000 R14: ffff888042afc178 R15: 0000000000000000 FS: 000055555ae8d380(0000) GS:ffff88801fe00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020201000 CR3: 00000000378be000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400