loop0: detected capacity change from 0 to 32768 ================================================================================ UBSAN: array-index-out-of-bounds in fs/jfs/jfs_imap.c:751:5 index 255 is out of range for type 'struct dtslot[128]' CPU: 0 PID: 5414 Comm: syz-executor.0 Not tainted 6.6.0-rc4-syzkaller-00029-gcbf3a2cb156a-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b5/0x2a0 lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:217 [inline] __ubsan_handle_out_of_bounds+0xf0/0x120 lib/ubsan.c:348 diWrite+0x1241/0x1ee0 fs/jfs/jfs_imap.c:751 txCommit+0xa00/0x6b40 fs/jfs/jfs_txnmgr.c:1255 jfs_mkdir+0x8eb/0xae0 fs/jfs/namei.c:290 vfs_mkdir+0x29d/0x450 fs/namei.c:4120 do_mkdirat+0x21e/0x480 fs/namei.c:4143 __do_sys_mkdirat fs/namei.c:4158 [inline] __se_sys_mkdirat fs/namei.c:4156 [inline] __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4156 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f668b07ad39 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f668c1480c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f668b19bf80 RCX: 00007f668b07ad39 RDX: 00000000000001ff RSI: 00000000200000c0 RDI: ffffffffffffff9c RBP: 00007f668b0d7567 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f668b19bf80 R15: 00007ffc1b28c078 ================================================================================