X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fsignal%2Fsigprocmask.c;h=96d084783787fb6bc76d525c66ddc5fa4090cb38;hb=685e40bb09f5f24a2af54ea09c97328808f76990;hp=db27f12a8ff58782c388a5f4528d5e906cfaa2dc;hpb=a49c119276742d7d212fb88f83a8f559ca549e72;p=musl

diff --git a/src/signal/sigprocmask.c b/src/signal/sigprocmask.c
index db27f12a..96d08478 100644
--- a/src/signal/sigprocmask.c
+++ b/src/signal/sigprocmask.c
@@ -1,4 +1,5 @@
 #include <signal.h>
+#include <errno.h>
 #include "syscall.h"
 #include "libc.h"
 #include "pthread_impl.h"
@@ -11,8 +12,12 @@ int __libc_sigprocmask(int how, const sigset_t *set, sigset_t *old)
 int __sigprocmask(int how, const sigset_t *set, sigset_t *old)
 {
 	sigset_t tmp;
+	if (how > 2U) {
+		errno = EINVAL;
+		return -1;
+	}
 	/* Disallow blocking thread control signals */
-	if (how != SIG_UNBLOCK) {
+	if (set && how != SIG_UNBLOCK) {
 		tmp = *set;
 		set = &tmp;
 		sigdelset(&tmp, SIGCANCEL);
@@ -22,4 +27,3 @@ int __sigprocmask(int how, const sigset_t *set, sigset_t *old)
 }
 
 weak_alias(__sigprocmask, sigprocmask);
-weak_alias(__sigprocmask, pthread_sigmask);