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/*
int sys_fork(struct pt_regs *regs)
*/
#include <sys/wait.h>
#include <stdlib.h>
#include <unistd.h>
#include "pids.h"
#include "sanitise.h"
#include "shm.h"
#include "trinity.h"
/*
* Because we don't want to forkbomb, we don't really do anything in the child process.
* We only actually do a fork at all on the off-chance that it might trigger some oddness
* in the VMAs we've created when we COW.
*
* TODO: Maybe do some dirty_mapping calls in the child ?
* TODO: Maybe we could enforce an upper limit on the child count before we fork,
* and keep track of them using handle_child ?
*/
static void post_fork(struct syscallrecord *rec)
{
pid_t pid;
pid = rec->retval;
if (pid == 0) {
// child
sleep(1);
_exit(EXIT_SUCCESS);
} else {
__unused__ int ret;
while (pid_alive(pid) == TRUE) {
int status;
ret = waitpid(pid, &status, WUNTRACED | WCONTINUED | WNOHANG);
}
}
}
struct syscallentry syscall_fork = {
.name = "fork",
.num_args = 0,
.flags = AVOID_SYSCALL, // No args to fuzz, confuses fuzzer
.post = post_fork,
};
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