#include <sys/sem.h>
+#include <limits.h>
+#include <errno.h>
#include "syscall.h"
#include "ipc.h"
int semget(key_t key, int n, int fl)
{
-#ifdef __NR_semget
- return syscall3(__NR_semget, key, n, fl);
+ /* The kernel uses the wrong type for the sem_nsems member
+ * of struct semid_ds, and thus might not check that the
+ * n fits in the correct (per POSIX) userspace type, so
+ * we have to check here. */
+ if (n > USHRT_MAX) return __syscall_ret(-EINVAL);
+#ifdef SYS_semget
+ return syscall(SYS_semget, key, n, fl);
#else
- return syscall4(__NR_ipc, IPCOP_semget, key, n, fl);
+ return syscall(SYS_ipc, IPCOP_semget, key, n, fl);
#endif
}