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don't fail pthread_sigmask/sigprocmask on invalid how when set is null
[musl]
/
src
/
thread
/
pthread_sigmask.c
diff --git
a/src/thread/pthread_sigmask.c
b/src/thread/pthread_sigmask.c
index
88c333f
..
f188782
100644
(file)
--- a/
src/thread/pthread_sigmask.c
+++ b/
src/thread/pthread_sigmask.c
@@
-5,7
+5,7
@@
int pthread_sigmask(int how, const sigset_t *restrict set, sigset_t *restrict old)
{
int ret;
int pthread_sigmask(int how, const sigset_t *restrict set, sigset_t *restrict old)
{
int ret;
- if ((unsigned)how - SIG_BLOCK > 2U) return EINVAL;
+ if (
set &&
(unsigned)how - SIG_BLOCK > 2U) return EINVAL;
ret = -__syscall(SYS_rt_sigprocmask, how, set, old, _NSIG/8);
if (!ret && old) {
if (sizeof old->__bits[0] == 8) {
ret = -__syscall(SYS_rt_sigprocmask, how, set, old, _NSIG/8);
if (!ret && old) {
if (sizeof old->__bits[0] == 8) {