syzbot

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kernel BUG at fs/ocfs2/alloc.c:6012!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5881 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__ocfs2_flush_truncate_log+0xf7e/0x10b0 fs/ocfs2/alloc.c:6012
Code: ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 28 fc ff ff 48 89 df e8 d3 36 93 fe e9 1b fc ff ff e8 59 c8 3b fe 0f 0b e8 52 c8 3b fe <0f> 0b f3 0f 1e fa 65 44 8b 35 50 ed b9 7c bf 07 00 00 00 44 89 f6
RSP: 0018:ffffc900033d79c0 EFLAGS: 00010293
RAX: ffffffff8349c86e RBX: ffff88802597c000 RCX: ffff888021520000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900033d7bd8 R08: ffffc900033d7947 R09: 1ffff9200067af28
R10: dffffc0000000000 R11: fffff5200067af29 R12: 0000000000000001
R13: ffff8880624924f8 R14: ffff88805fd21a00 R15: ffff8880604b1400
FS:  000055558aea0500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff8ff3fe000 CR3: 000000001b771000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 ocfs2_flush_truncate_log+0x4f/0x60 fs/ocfs2/alloc.c:6077
 ocfs2_sync_fs+0x117/0x310 fs/ocfs2/super.c:402
 sync_filesystem+0x1c2/0x220 fs/sync.c:66
 generic_shutdown_super+0x6f/0x2b0 fs/super.c:666
 kill_block_super+0x44/0x90 fs/super.c:1660
 deactivate_locked_super+0x97/0x100 fs/super.c:481
 cleanup_mnt+0x429/0x4c0 fs/namespace.c:1259
 task_work_run+0x1ce/0x250 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xf6/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f14fd390a77
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fff2ce8eb78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f14fd413d7d RCX: 00007f14fd390a77
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff2ce8ec30
RBP: 00007fff2ce8ec30 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff2ce8fcc0
R13: 00007f14fd413d7d R14: 00000000000199ec R15: 00007fff2ce8fd00
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__ocfs2_flush_truncate_log+0xf7e/0x10b0 fs/ocfs2/alloc.c:6012
Code: ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 28 fc ff ff 48 89 df e8 d3 36 93 fe e9 1b fc ff ff e8 59 c8 3b fe 0f 0b e8 52 c8 3b fe <0f> 0b f3 0f 1e fa 65 44 8b 35 50 ed b9 7c bf 07 00 00 00 44 89 f6
RSP: 0018:ffffc900033d79c0 EFLAGS: 00010293
RAX: ffffffff8349c86e RBX: ffff88802597c000 RCX: ffff888021520000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900033d7bd8 R08: ffffc900033d7947 R09: 1ffff9200067af28
R10: dffffc0000000000 R11: fffff5200067af29 R12: 0000000000000001
R13: ffff8880624924f8 R14: ffff88805fd21a00 R15: ffff8880604b1400
FS:  000055558aea0500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff8ff3fe000 CR3: 000000001b771000 CR4: 00000000003506e0