loop4: detected capacity change from 0 to 32768
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:1598:11
index 26 is out of range for type 'struct lv[20]'
CPU: 1 UID: 0 PID: 6352 Comm: syz.4.122 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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
 dtSplitPage+0x34bc/0x36a0 fs/jfs/jfs_dtree.c:1598
 dtSplitUp fs/jfs/jfs_dtree.c:1089 [inline]
 dtInsert+0x1080/0x5cb0 fs/jfs/jfs_dtree.c:868
 jfs_create+0x730/0xae0 fs/jfs/namei.c:138
 vfs_create_no_perm fs/namei.c:4194 [inline]
 lookup_open+0xb5e/0x1380 fs/namei.c:4643
 open_last_lookups fs/namei.c:4835 [inline]
 path_openat+0x696/0x1e40 fs/namei.c:5075
 do_file_open+0x23e/0x4a0 fs/namei.c:5107
 do_sys_openat2+0x115/0x200 fs/open.c:1452
 do_sys_open fs/open.c:1458 [inline]
 __do_sys_creat fs/open.c:1536 [inline]
 __se_sys_creat fs/open.c:1530 [inline]
 __x64_sys_creat+0x8f/0xc0 fs/open.c:1530
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb80639e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb8072f8028 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007fb806625fa0 RCX: 00007fb80639e159
RDX: 0000000000000000 RSI: 0000000000000071 RDI: 0000200000000580
RBP: 00007fb806435024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb806626038 R14: 00007fb806625fa0 R15: 00007ffee16a9628
 </TASK>
---[ end trace ]---