overhaul implementation-internal signal protections

[musl] / src / signal / sigismember.c

diff --git a/src/signal/sigismember.c b/src/signal/sigismember.c
index afd29e5..d3de6ef 100644 (file)
--- a/src/signal/sigismember.c
+++ b/src/signal/sigismember.c
@@ -4,7 +4,7 @@
 int sigismember(const 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;
        }