------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:2892:37
index -28 is out of range for type 'dtslot [128]'
CPU: 0 PID: 5181 Comm: syz-executor168 Not tainted 6.9.0-rc3-syzkaller-00011-g20cb38a7af88 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:114
 ubsan_epilogue lib/ubsan.c:217 [inline]
 __ubsan_handle_out_of_bounds+0x110/0x150 lib/ubsan.c:415
 jfs_readdir+0x34a3/0x4310 fs/jfs/jfs_dtree.c:2892
 wrap_directory_iterator+0xa5/0xe0 fs/readdir.c:67
 iterate_dir+0x292/0x9e0 fs/readdir.c:110
 __do_sys_getdents64 fs/readdir.c:409 [inline]
 __se_sys_getdents64 fs/readdir.c:394 [inline]
 __x64_sys_getdents64+0x14f/0x2e0 fs/readdir.c:394
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x72/0x7a
RIP: 0033:0x7f8d1b6f46b9
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:00007fff310f8478 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007fff310f8648 RCX: 00007f8d1b6f46b9
RDX: 00000000000000c5 RSI: 0000000020000200 RDI: 0000000000000004
RBP: 00007f8d1b76d610 R08: 0000000000000000 R09: 00007fff310f8648
R10: 002c313532317063 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff310f8638 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
---[ end trace ]---