------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:2894:37
index -28 is out of range for type 'dtslot [128]'
CPU: 0 UID: 0 PID: 5520 Comm: syz-executor.0 Not tainted 6.11.0-rc4-syzkaller-00138-gb78b25f69a1d #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:119
 ubsan_epilogue lib/ubsan.c:231 [inline]
 __ubsan_handle_out_of_bounds+0x110/0x150 lib/ubsan.c:429
 jfs_readdir+0x34a3/0x4310 fs/jfs/jfs_dtree.c:2894
 wrap_directory_iterator+0xa5/0xe0 fs/readdir.c:65
 iterate_dir+0x53e/0xb60 fs/readdir.c:108
 __do_sys_getdents64 fs/readdir.c:407 [inline]
 __se_sys_getdents64 fs/readdir.c:392 [inline]
 __x64_sys_getdents64+0x14f/0x2e0 fs/readdir.c:392
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc19567de69
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:00007fc1964c50c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007fc1957abf80 RCX: 00007fc19567de69
RDX: 00000000000000c5 RSI: 0000000020000200 RDI: 0000000000000004
RBP: 00007fc1956ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fc1957abf80 R15: 00007ffdcdf59708
 </TASK>
---[ end trace ]---