fix stale locks left behind when pthread_create fails

[musl] / src / thread / pthread_sigmask.c

diff --git a/src/thread/pthread_sigmask.c b/src/thread/pthread_sigmask.c
index 60a440b..f6102ad 100644 (file)
--- a/src/thread/pthread_sigmask.c
+++ b/src/thread/pthread_sigmask.c
@@ -3,8 +3,18 @@
 #include <pthread.h>
 #include "syscall.h"
 
-int pthread_sigmask(int how, const sigset_t *set, sigset_t *old)
+int pthread_sigmask(int how, const sigset_t *restrict set, sigset_t *restrict old)
 {
-       if (how > 2U) return EINVAL;
-       return -__syscall(SYS_rt_sigprocmask, how, set, old, 8);
+       int ret;
+       if ((unsigned)how - SIG_BLOCK > 2U) return EINVAL;
+       ret = -__syscall(SYS_rt_sigprocmask, how, set, old, __SYSCALL_SSLEN);
+       if (!ret && old) {
+               if (sizeof old->__bits[0] == 8) {
+                       old->__bits[0] &= ~0x380000000ULL;
+               } else {
+                       old->__bits[0] &= ~0x80000000UL;
+                       old->__bits[1] &= ~0x3UL;
+               }
+       }
+       return ret;
 }