loop0: detected capacity change from 0 to 32768
------------[ cut here ]------------
kernel BUG at fs/ocfs2/buffer_head_io.c:45!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 4335 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
RIP: 0010:ocfs2_write_block+0x5be/0x620 fs/ocfs2/buffer_head_io.c:45
Code: 00 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 c9 9e 9e fe 48 8b 3b 4c 89 ee 48 8b 54 24 08 e8 b9 36 0f 00 eb 1d e8 32 80 59 fe <0f> 0b e8 2b 80 59 fe 0f 0b e8 24 80 59 fe e9 52 fb ff ff e8 1a 80
RSP: 0018:ffffc90002f2ee80 EFLAGS: 00010293
RAX: ffffffff831f726e RBX: ffff88806849a3b8 RCX: ffff88807bd75940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffc90002f2ef50 R08: ffffffff8d8aeaef R09: 1ffffffff1b15d5d
R10: dffffc0000000000 R11: fffffbfff1b15d5e R12: 0000000000000000
R13: 0000000000000000 R14: ffff88806849a3a0 R15: ffff88807a910000
FS:  000055557a2fc500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f103b39d000 CR3: 0000000073052000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ocfs2_update_disk_slot+0x535/0x750 fs/ocfs2/slot_map.c:197
 ocfs2_find_slot+0x4b1/0xa10 fs/ocfs2/slot_map.c:482
 ocfs2_mount_volume+0x19c/0x15a0 fs/ocfs2/super.c:1809
 ocfs2_fill_super+0x2eae/0x50c0 fs/ocfs2/super.c:1083
 mount_bdev+0x28a/0x3c0 fs/super.c:1400
 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x247/0xa40 fs/namespace.c:3034
 do_mount fs/namespace.c:3377 [inline]
 __do_sys_mount fs/namespace.c:3585 [inline]
 __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fd4341af10a
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe816dfd88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffe816dfe10 RCX: 00007fd4341af10a
RDX: 0000200000004440 RSI: 0000200000000040 RDI: 00007ffe816dfdd0
RBP: 0000200000004440 R08: 00007ffe816dfe10 R09: 0000000000000004
R10: 0000000000000004 R11: 0000000000000246 R12: 0000200000000040
R13: 00007ffe816dfdd0 R14: 000000000000445c R15: 0000200000000080
 </TASK>
Modules linked in:
---[ end trace fdf6b1d55b36b991 ]---
RIP: 0010:ocfs2_write_block+0x5be/0x620 fs/ocfs2/buffer_head_io.c:45
Code: 00 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 c9 9e 9e fe 48 8b 3b 4c 89 ee 48 8b 54 24 08 e8 b9 36 0f 00 eb 1d e8 32 80 59 fe <0f> 0b e8 2b 80 59 fe 0f 0b e8 24 80 59 fe e9 52 fb ff ff e8 1a 80
RSP: 0018:ffffc90002f2ee80 EFLAGS: 00010293
RAX: ffffffff831f726e RBX: ffff88806849a3b8 RCX: ffff88807bd75940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffc90002f2ef50 R08: ffffffff8d8aeaef R09: 1ffffffff1b15d5d
R10: dffffc0000000000 R11: fffffbfff1b15d5e R12: 0000000000000000
R13: 0000000000000000 R14: ffff88806849a3a0 R15: ffff88807a910000
FS:  000055557a2fc500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f103b39f000 CR3: 0000000073052000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400