=======================================================
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:1387!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4021 Comm: syz-executor261 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1387 [inline]
pc : ocfs2_claim_suballoc_bits+0x19f0/0x1b74 fs/ocfs2/suballoc.c:1927
lr : ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1387 [inline]
lr : ocfs2_claim_suballoc_bits+0x19f0/0x1b74 fs/ocfs2/suballoc.c:1927
sp : ffff80001f106c80
x29: ffff80001f106ec0 x28: 1fffe000183a5e61 x27: 1fffe000183a5e66
x26: ffff80001f106d40 x25: 0000000000000000 x24: dfff800000000000
x23: ffff700003e20da8 x22: 0000000000000100 x21: ffff0000c1d2f330
x20: ffff0000e2a7be00 x19: ffff0000e2a7bec6 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000111a97c4 x15: 00000000fffffffc
x14: 0000000000ff0100 x13: ffffffffffffffff x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : ffff800009ce1da4
x8 : ffff0000da990000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff80001f1071f0 x4 : ffff80001f106f80 x3 : 0000000000000100
x2 : 0000000000000100 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1387 [inline]
 ocfs2_claim_suballoc_bits+0x19f0/0x1b74 fs/ocfs2/suballoc.c:1927
 __ocfs2_claim_clusters+0x26c/0x7e0 fs/ocfs2/suballoc.c:2338
 ocfs2_claim_clusters+0x8c/0xd4 fs/ocfs2/suballoc.c:2375
 ocfs2_local_alloc_new_window fs/ocfs2/localalloc.c:1170 [inline]
 ocfs2_local_alloc_slide_window fs/ocfs2/localalloc.c:1299 [inline]
 ocfs2_reserve_local_alloc_bits+0x1188/0x260c fs/ocfs2/localalloc.c:668
 ocfs2_reserve_clusters_with_limit+0x198/0x9e0 fs/ocfs2/suballoc.c:1162
 ocfs2_reserve_clusters+0x3c/0x50 fs/ocfs2/suballoc.c:1223
 ocfs2_mknod+0xc10/0x1e88 fs/ocfs2/namei.c:354
 ocfs2_mkdir+0x180/0x468 fs/ocfs2/namei.c:657
 vfs_mkdir+0x314/0x4d4 fs/namei.c:4065
 do_mkdirat+0x1bc/0x508 fs/namei.c:4090
 __do_sys_mkdirat fs/namei.c:4105 [inline]
 __se_sys_mkdirat fs/namei.c:4103 [inline]
 __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4103
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: d4210000 979e5b21 d4210000 979e5b1f (d4210000) 
---[ end trace a2e2fa493bc74c67 ]---