overhaul implementation-internal signal protections

[musl] / src / signal / sigaddset.c

diff --git a/src/signal/sigaddset.c b/src/signal/sigaddset.c
index 23e655d..d632c6f 100644 (file)
--- a/src/signal/sigaddset.c
+++ b/src/signal/sigaddset.c
@@ -4,7 +4,7 @@
 int sigaddset(sigset_t *set, int sig)
 {
        unsigned s = sig-1;
-       if (s >= 8*sizeof(sigset_t)) {
+       if (s >= 8*sizeof(sigset_t) || s-32U<3) {
                errno = EINVAL;
                return -1;
        }