prevent shmget from allocating objects that overflow ptrdiff_t

[musl] / src / ipc / shmget.c

#include <sys/shm.h>
#include <stdint.h>
#include "syscall.h"
#include "ipc.h"

int shmget(key_t key, size_t size, int flag)
{
        if (size > PTRDIFF_MAX) size = SIZE_MAX;
#ifdef SYS_shmget
        return syscall(SYS_shmget, key, size, flag);
#else
        return syscall(SYS_ipc, IPCOP_shmget, key, size, flag);
#endif
}