=======================================================
ocfs2: Slot 0 on device (7,0) was already allocated to this node!
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
------------[ cut here ]------------
kernel BUG at fs/ocfs2/suballoc.c:1443!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5309 Comm: syz-executor391 Not tainted 6.15.0-rc7-syzkaller-00142-g4856ebd99715 #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_find_victim_chain fs/ocfs2/suballoc.c:1443 [inline]
RIP: 0010:ocfs2_claim_suballoc_bits+0x243c/0x2450 fs/ocfs2/suballoc.c:1996
Code: c2 fb ff ff e8 55 1e 1e fe 90 0f 0b e8 4d 1e 1e fe 90 0f 0b e8 45 1e 1e fe 90 0f 0b e8 3d 1e 1e fe 90 0f 0b e8 35 1e 1e fe 90 <0f> 0b e8 2d 1e 1e fe 90 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90
RSP: 0018:ffffc9000d0f6e80 EFLAGS: 00010293
RAX: ffffffff83a1d39b RBX: 0000000000000000 RCX: ffff88801e194880
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000d0f7110 R08: ffffc9000d0f71a0 R09: 0000000000000000
R10: ffffc9000d0f71a0 R11: fffff52001a1ee39 R12: ffff888035b6f308
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff11006b6de61
FS:  0000555578ca8380(0000) GS:ffff88808d6c2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005624ad7ec6d8 CR3: 000000004342d000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ocfs2_claim_new_inode+0x332/0x7a0 fs/ocfs2/suballoc.c:2292
 ocfs2_mknod_locked+0x100/0x250 fs/ocfs2/namei.c:634
 ocfs2_mknod+0x10c7/0x2050 fs/ocfs2/namei.c:381
 ocfs2_create+0x1a5/0x440 fs/ocfs2/namei.c:673
 lookup_open fs/namei.c:3701 [inline]
 open_last_lookups fs/namei.c:3800 [inline]
 path_openat+0x14f4/0x3830 fs/namei.c:4036
 do_filp_open+0x1fa/0x410 fs/namei.c:4066
 do_sys_openat2+0x121/0x1c0 fs/open.c:1429
 do_sys_open fs/open.c:1444 [inline]
 __do_sys_openat fs/open.c:1460 [inline]
 __se_sys_openat fs/open.c:1455 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1455
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f191c97cad9
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:00007ffc9ecc70a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f191c97cad9
RDX: 0000000000040242 RSI: 00002000000002c0 RDI: 00000000ffffff9c
RBP: 00007f191c9f45f0 R08: 0000000000004446 R09: 0000555578ca94c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc9ecc70d0
R13: 00007ffc9ecc72f8 R14: 431bde82d7b634db R15: 00007f191c9c503b
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1443 [inline]
RIP: 0010:ocfs2_claim_suballoc_bits+0x243c/0x2450 fs/ocfs2/suballoc.c:1996
Code: c2 fb ff ff e8 55 1e 1e fe 90 0f 0b e8 4d 1e 1e fe 90 0f 0b e8 45 1e 1e fe 90 0f 0b e8 3d 1e 1e fe 90 0f 0b e8 35 1e 1e fe 90 <0f> 0b e8 2d 1e 1e fe 90 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90
RSP: 0018:ffffc9000d0f6e80 EFLAGS: 00010293
RAX: ffffffff83a1d39b RBX: 0000000000000000 RCX: ffff88801e194880
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000d0f7110 R08: ffffc9000d0f71a0 R09: 0000000000000000
R10: ffffc9000d0f71a0 R11: fffff52001a1ee39 R12: ffff888035b6f308
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff11006b6de61
FS:  0000555578ca8380(0000) GS:ffff88808d6c2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005624ad7ec6d8 CR3: 000000004342d000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400