================================================================================ UBSAN: array-index-out-of-bounds in fs/jfs/jfs_imap.c:749:4 index 255 is out of range for type 'struct dtslot [128]' CPU: 1 PID: 3606 Comm: syz-executor322 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:151 [inline] __ubsan_handle_out_of_bounds+0xdb/0x130 lib/ubsan.c:283 diWrite+0x1311/0x1f80 fs/jfs/jfs_imap.c:749 txCommit+0xa2e/0x6d40 fs/jfs/jfs_txnmgr.c:1250 jfs_mkdir+0x911/0xb00 fs/jfs/namei.c:290 vfs_mkdir+0x3b3/0x590 fs/namei.c:4013 do_mkdirat+0x279/0x550 fs/namei.c:4038 __do_sys_mkdirat fs/namei.c:4053 [inline] __se_sys_mkdirat fs/namei.c:4051 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4051 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f1a977dfe49 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd8f230c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1a977dfe49 RDX: 00000000000001ff RSI: 00000000200000c0 RDI: ffffffffffffff9c RBP: 00007f1a9779f610 R08: 0000000000000000 R09: 0000000000000000 R10: 00005555566302c0 R11: 0000000000000246 R12: 00000000f8008000 R13: 0000000000000000 R14: 00083878000000fc R15: 0000000000000000 ================================================================================