loop1: detected capacity change from 0 to 32768
================================================================================
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:1601:11
index 27 is out of range for type 'struct lv[20]'
CPU: 1 PID: 6819 Comm: syz.1.299 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
 ubsan_epilogue+0xa/0x30 lib/ubsan.c:217
 __ubsan_handle_out_of_bounds+0xe3/0xf0 lib/ubsan.c:348
 dtSplitPage+0x37bf/0x3a10 fs/jfs/jfs_dtree.c:1601
 dtSplitUp fs/jfs/jfs_dtree.c:1092 [inline]
 dtInsert+0x1051/0x5bd0 fs/jfs/jfs_dtree.c:871
 jfs_create+0x72d/0xac0 fs/jfs/namei.c:137
 lookup_open fs/namei.c:3539 [inline]
 open_last_lookups fs/namei.c:3607 [inline]
 path_openat+0x1705/0x3270 fs/namei.c:3841
 do_filp_open+0x1f2/0x430 fs/namei.c:3871
 do_sys_openat2+0x134/0x1d0 fs/open.c:1422
 do_sys_open fs/open.c:1437 [inline]
 __do_sys_creat fs/open.c:1515 [inline]
 __se_sys_creat fs/open.c:1509 [inline]
 __x64_sys_creat+0x90/0xb0 fs/open.c:1509
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f848799e0d9
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:00007f848885e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f8487c25fa0 RCX: 00007f848799e0d9
RDX: 0000000000000000 RSI: 0000000000000044 RDI: 00002000000009c0
RBP: 00007f8487a35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8487c26038 R14: 00007f8487c25fa0 R15: 00007ffc082c3d18
 </TASK>
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