------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in fs/nilfs2/dir.c:257:18
index 15 is out of range for type 'unsigned char[15]'
CPU: 0 PID: 5057 Comm: syz-executor165 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
ubsan_epilogue lib/ubsan.c:217 [inline]
__ubsan_handle_out_of_bounds+0x121/0x150 lib/ubsan.c:415
nilfs_set_de_type fs/nilfs2/dir.c:257 [inline]
nilfs_add_link+0xb39/0xb80 fs/nilfs2/dir.c:501
nilfs_link+0x136/0x220 fs/nilfs2/namei.c:192
vfs_link+0x4f5/0x690 fs/namei.c:4608
do_linkat+0x356/0x760 fs/namei.c:4679
__do_sys_linkat fs/namei.c:4707 [inline]
__se_sys_linkat fs/namei.c:4704 [inline]
__x64_sys_linkat+0xdd/0xf0 fs/namei.c:4704
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f0624efc679
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff6dc40a98 EFLAGS: 00000246 ORIG_RAX: 0000000000000109
RAX: ffffffffffffffda RBX: 00007fff6dc40c68 RCX: 00007f0624efc679
RDX: 0000000000000004 RSI: 0000000020000180 RDI: 0000000000000004
RBP: 00007f0624f70610 R08: 0000000000000000 R09: 00007fff6dc40c68
R10: 0000000020000640 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff6dc40c58 R14: 0000000000000001 R15: 0000000000000001
</TASK>
---[ end trace ]---