================================================================================
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:2887:37
index -28 is out of range for type 'dtslot [128]'
CPU: 1 PID: 5484 Comm: syz-executor.0 Not tainted 6.7.0-rc5-syzkaller-00014-g26aff849438c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x125/0x1b0 lib/dump_stack.c:106
 ubsan_epilogue lib/ubsan.c:217 [inline]
 __ubsan_handle_out_of_bounds+0x111/0x150 lib/ubsan.c:348
 jfs_readdir+0x37a2/0x4320 fs/jfs/jfs_dtree.c:2887
 wrap_directory_iterator+0xa5/0xe0 fs/readdir.c:67
 iterate_dir+0x1e5/0x5b0 fs/readdir.c:106
 __do_sys_getdents64 fs/readdir.c:405 [inline]
 __se_sys_getdents64 fs/readdir.c:390 [inline]
 __x64_sys_getdents64+0x14f/0x2e0 fs/readdir.c:390
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f604027cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f60410530c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f604039bf80 RCX: 00007f604027cae9
RDX: 00000000000000c5 RSI: 0000000020000200 RDI: 0000000000000004
RBP: 00007f60402c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f604039bf80 R15: 00007ffce87e3718
 </TASK>
================================================================================