Infinite loop

README.md

Environment

• OS: Ubuntu 16.04.3 LTS
• libc: 2.23-0ubuntu10

Ref

https://sourceware.org/bugzilla/show_bug.cgi?id=23151

Run

$ gcc main.c
$ ./a.out
aaaaaaaaa
aaaaaaaaa
aaaaaaaaa
aaaaaaaaa
aaaaaaaaa
aaaaaaaaa
aaaaaaaaa
aaaaaaaaa
...

main.c

#include <stdio.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <unistd.h>

int main(){
    FILE* fp = fopen("test.txt", "r");
    char s[10];

    while (fgets(s, 10, fp) != NULL) {
        pid_t pid = fork();
        int status;
        if (pid == 0) {
            exit(0);
        } else {
            waitpid(pid, &status, 0);
        }
        printf("%s\n", s);
    }
}

test.txt

aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa