【ASAN 】【Bug】【MemLeak】【12.1 and earlier gcc versions】There is a MemLeak problem in __interceptor__pthread_create function

[langewin]

In my demo code, Receive a user input parameter time microsecond, create an infinite loop, create a thread inside the loop, print the current time in the thread, and sleep the user input parameter time.

#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <sys/time.h>
#include <unistd.h>

void *print_time(void *arg) {
    struct timeval tv;
    gettimeofday(&tv, NULL);
    printf("Current time: %ld.%06ld", tv.tv_sec, tv.tv_usec);
    return NULL;
}

int main(int argc, char **argv) {
    if (argc != 2) {
        printf("Usage: %s <time in microseconds>", argv[0]);
        return -1;
    }
    long time_micro = atol(argv[1]);
    while (1) {
        pthread_t tid;
        pthread_create(&tid, NULL, print_time, NULL);
        usleep(time_micro);
    }
    return 0;
}

No matter how long I set the sleep interval, such as 200 microseconds, 1 second, 10 seconds, etc., the RssAnno physical memory of the program has a regular memory leak.
For the first time, 56 KB of physical memory is added to the AsanThread::Create application. Then, the memory is released in AsanThread::Destroy. An additional 60 KB memory is applied for the second time, but AsanThread::Destroy releases only 56 KB memory each time. As a result, 4 KB physical memory is leaked each time a thread is created twice.
This problem occurs in libasan.so of gcc10.3 and gcc12.1 of arm64 version.
Do you have a description and fix?