ptrace+seccomp mkdirat path leakage

[w296488320]

I recently found a problem:
I am using ptrace + seccomp and only use these two modules and functions. But when intercepting svc for path redirection found mkdirat svc, occasionally missing resulting that the file not being created under the directory I need. If I hook the libc mkdirat can solve this problem, but I do not want the mkdirat function in hook libc. Do you know the specific reason for the problem?