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UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:1600:11
index 26 is out of range for type 'struct lv[20]'
CPU: 1 PID: 9651 Comm: syz.2.1236 Tainted: G        W          6.1.122-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 ubsan_epilogue lib/ubsan.c:151 [inline]
 __ubsan_handle_out_of_bounds+0x118/0x140 lib/ubsan.c:282
 dtSplitPage+0x3e56/0x3ec0 fs/jfs/jfs_dtree.c:1600
 dtSplitUp fs/jfs/jfs_dtree.c:1091 [inline]
 dtInsert+0x14b9/0x6c00 fs/jfs/jfs_dtree.c:870
 jfs_rename+0xafa/0x1cb0 fs/jfs/namei.c:1224
 vfs_rename+0xd32/0x10f0 fs/namei.c:4874
 do_renameat2+0xde0/0x1440 fs/namei.c:5027
 __do_sys_rename fs/namei.c:5073 [inline]
 __se_sys_rename fs/namei.c:5071 [inline]
 __x64_sys_rename+0x82/0x90 fs/namei.c:5071
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f6eb1385d29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6eb2177038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f6eb1575fa0 RCX: 00007f6eb1385d29
RDX: 0000000000000000 RSI: 0000000020000f40 RDI: 0000000020000100
RBP: 00007f6eb1401b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6eb1575fa0 R15: 00007ffdff9e33a8
 </TASK>
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