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/suballoc.c:1441! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5098 Comm: syz-executor186 Not tainted 6.11.0-rc4-syzkaller-00033-g872cf28b8df9 #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_find_victim_chain fs/ocfs2/suballoc.c:1441 [inline] RIP: 0010:ocfs2_claim_suballoc_bits+0x240c/0x2570 fs/ocfs2/suballoc.c:1982 Code: 0a 12 05 fe 90 0f 0b e8 02 12 05 fe 90 0f 0b e8 fa 11 05 fe 90 0f 0b e8 f2 11 05 fe 90 0f 0b e8 4a 40 28 08 e8 e5 11 05 fe 90 <0f> 0b e8 dd 11 05 fe 90 0f 0b f3 0f 1e fa 65 8b 1d 9b 5d 75 7c bf RSP: 0018:ffffc9000afaeda0 EFLAGS: 00010293 RAX: ffffffff838e795b RBX: 0000000000000000 RCX: ffff88801b6a4880 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000afaf050 R08: ffffffff838e6445 R09: 0000000000000000 R10: ffffc9000afaf0e0 R11: fffff520015f5e21 R12: dffffc0000000000 R13: ffff888036a5a188 R14: ffff888037e2d400 R15: 0000000000000002 FS: 00005555802a3380(0000) GS:ffff888020800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000037be4000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ocfs2_claim_new_inode+0x338/0x870 fs/ocfs2/suballoc.c:2267 ocfs2_mknod_locked+0x17a/0x3b0 fs/ocfs2/namei.c:633 ocfs2_mknod+0x17d4/0x2b40 fs/ocfs2/namei.c:379 ocfs2_create+0x1ab/0x480 fs/ocfs2/namei.c:672 lookup_open fs/namei.c:3578 [inline] open_last_lookups fs/namei.c:3647 [inline] path_openat+0x1a9a/0x3470 fs/namei.c:3883 do_filp_open+0x235/0x490 fs/namei.c:3913 do_sys_openat2+0x13e/0x1d0 fs/open.c:1416 do_sys_open fs/open.c:1431 [inline] __do_sys_openat fs/open.c:1447 [inline] __se_sys_openat fs/open.c:1442 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1442 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: 0033:0x7f4728506c59 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:00007ffe134bc668 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4728506c59 RDX: 0000000000040942 RSI: 0000000020000200 RDI: 00000000ffffff9c RBP: 00007f472857e5f0 R08: 00005555802a44c0 R09: 00005555802a44c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe134bc690 R13: 00007ffe134bc8b8 R14: 431bde82d7b634db R15: 00007f472854f03b Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1441 [inline] RIP: 0010:ocfs2_claim_suballoc_bits+0x240c/0x2570 fs/ocfs2/suballoc.c:1982 Code: 0a 12 05 fe 90 0f 0b e8 02 12 05 fe 90 0f 0b e8 fa 11 05 fe 90 0f 0b e8 f2 11 05 fe 90 0f 0b e8 4a 40 28 08 e8 e5 11 05 fe 90 <0f> 0b e8 dd 11 05 fe 90 0f 0b f3 0f 1e fa 65 8b 1d 9b 5d 75 7c bf RSP: 0018:ffffc9000afaeda0 EFLAGS: 00010293 RAX: ffffffff838e795b RBX: 0000000000000000 RCX: ffff88801b6a4880 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000afaf050 R08: ffffffff838e6445 R09: 0000000000000000 R10: ffffc9000afaf0e0 R11: fffff520015f5e21 R12: dffffc0000000000 R13: ffff888036a5a188 R14: ffff888037e2d400 R15: 0000000000000002 FS: 00005555802a3380(0000) GS:ffff888020800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000037be4000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400