UFO tlock:0xffffc900034f2318
UFO tlock:0xffffc900034f24c8
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:784:21
index -1 is out of range for type 'struct dtslot[128]'
CPU: 0 UID: 0 PID: 11820 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 ubsan_epilogue+0xa/0x30 lib/ubsan.c:233
 __ubsan_handle_out_of_bounds+0xe8/0xf0 lib/ubsan.c:455
 dtSearch+0x1a66/0x21b0 fs/jfs/jfs_dtree.c:784
 dtDelete+0x127/0x2d60 fs/jfs/jfs_dtree.c:2102
 jfs_unlink+0x29e/0x9f0 fs/jfs/namei.c:503
 vfs_unlink+0x272/0x6d0 fs/namei.c:5470
 filename_unlinkat+0x3d3/0x610 fs/namei.c:5540
 __do_sys_unlink fs/namei.c:5575 [inline]
 __se_sys_unlink+0x2e/0x140 fs/namei.c:5572
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8c9e9ab887
Code: 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fffe9db4b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8c9e9ab887
RDX: 00007fffe9db4b70 RSI: 00007fffe9db4c00 RDI: 00007fffe9db4c00
RBP: 00007fffe9db4c00 R08: 00007fffe9db5c00 R09: 00000000ffffffff
R10: 0000000000000100 R11: 0000000000000206 R12: 00007fffe9db5cf0
R13: 00007f8c9ea42050 R14: 0000000000095f5b R15: 00007fffe9db6dc0
 </TASK>
---[ end trace ]---