ocfs2: Slot 0 on device (7,2) was already allocated to this node!
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kernel BUG at fs/ocfs2/buffer_head_io.c:45!
Internal error: Oops - BUG: 00000000f2000800 [#1]  SMP
Modules linked in:
CPU: 1 UID: 0 PID: 6717 Comm: syz.2.12 Not tainted 6.16.0-rc4-syzkaller-g7482bb149b9f #0 PREEMPT 
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_write_block+0x5e8/0x6d8 fs/ocfs2/buffer_head_io.c:45
lr : ocfs2_write_block+0x5e8/0x6d8 fs/ocfs2/buffer_head_io.c:45
sp : ffff8000a29a6d00
x29: ffff8000a29a6da0 x28: 1fffe000182b42ce x27: dfff800000000000
x26: ffff8000a29a6d20 x25: ffff700014534da4 x24: ffff80008f66e768
x23: 0000000000000002 x22: 0000000000000000 x21: ffff0000d8390000
x20: ffff0000c15a1658 x19: ffff0000f3a232f0 x18: 1fffe000337d8876
x17: ffff80008f66e000 x16: ffff80008aefca08 x15: 0000000000000001
x14: 1fffe0001b072020 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000080000 x10: 000000000001c238 x9 : ffff8000a4866000
x8 : 000000000001c239 x7 : ffff800082162dfc x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80008052cc94
x2 : ffff0000f3a232f0 x1 : 0000000000000000 x0 : 0000000000000002
Call trace:
 ocfs2_write_block+0x5e8/0x6d8 fs/ocfs2/buffer_head_io.c:45 (P)
 ocfs2_update_disk_slot+0x4f0/0x780 fs/ocfs2/slot_map.c:197
 ocfs2_find_slot+0x5d4/0xb0c fs/ocfs2/slot_map.c:482
 ocfs2_mount_volume fs/ocfs2/super.c:1749 [inline]
 ocfs2_fill_super+0x2f54/0x5340 fs/ocfs2/super.c:1083
 get_tree_bdev_flags+0x360/0x414 fs/super.c:1681
 get_tree_bdev+0x2c/0x3c fs/super.c:1704
 ocfs2_get_tree+0x28/0x38 fs/ocfs2/super.c:1184
 vfs_get_tree+0x90/0x28c fs/super.c:1804
 do_new_mount+0x228/0x814 fs/namespace.c:3902
 path_mount+0x5b4/0xde0 fs/namespace.c:4226
 do_mount fs/namespace.c:4239 [inline]
 __do_sys_mount fs/namespace.c:4450 [inline]
 __se_sys_mount fs/namespace.c:4427 [inline]
 __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4427
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
Code: b40007d7 9799dcf3 17fffeb6 9799dcf1 (d4210000) 
---[ end trace 0000000000000000 ]---