syzbot

 ... Log Wrap ... Log Wrap ... Log Wrap ...
find_entry called with index >= next_index
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:1997:37
index -128 is out of range for type 'struct dtslot[128]'
CPU: 1 UID: 0 PID: 5842 Comm: syz-executor268 Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 ubsan_epilogue lib/ubsan.c:231 [inline]
 __ubsan_handle_out_of_bounds+0x121/0x150 lib/ubsan.c:429
 dtSplitRoot+0xc9c/0x1930 fs/jfs/jfs_dtree.c:1997
 dtSplitUp fs/jfs/jfs_dtree.c:992 [inline]
 dtInsert+0x12cd/0x6c10 fs/jfs/jfs_dtree.c:870
 jfs_symlink+0x827/0x10f0 fs/jfs/namei.c:1020
 vfs_symlink+0x137/0x2e0 fs/namei.c:4669
 do_symlinkat+0x222/0x3a0 fs/namei.c:4695
 __do_sys_symlink fs/namei.c:4716 [inline]
 __se_sys_symlink fs/namei.c:4714 [inline]
 __x64_sys_symlink+0x7a/0x90 fs/namei.c:4714
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb144f8c6f9
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:00007ffc1536c068 EFLAGS: 00000246 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 00007ffc1536c248 RCX: 00007fb144f8c6f9
RDX: 00007fb144f8b791 RSI: 0000000020000180 RDI: 0000000020000700
RBP: 00007fb145005610 R08: 000000000000620d R09: 0000000000000000
R10: 00007ffc1536bf30 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc1536c238 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
---[ end trace ]---