Assert that we successfully obtained a lock

We should never fail to obtain a lock, so assert that we are successful

Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
Reviewed-by: Paul Dale <ppzgs1@gmail.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/27408)

diff --git a/crypto/threads_pthread.c b/crypto/threads_pthread.c
index 750ef201210b7dd539564dd83ca4836013cc211b..44d6ebe0923114dc4b2e5a0091283311dbdaf018 100644 (file)
--- a/crypto/threads_pthread.c
+++ b/crypto/threads_pthread.c
@@ -624,7 +624,7 @@ CRYPTO_RWLOCK *CRYPTO_THREAD_lock_new(void)
 __owur int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock)
 {
 # ifdef USE_RWLOCK
-    if (pthread_rwlock_rdlock(lock) != 0)
+    if (!ossl_assert(pthread_rwlock_rdlock(lock) == 0))
         return 0;
 # else
     if (pthread_mutex_lock(lock) != 0) {
@@ -639,7 +639,7 @@ __owur int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock)
 __owur int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK *lock)
 {
 # ifdef USE_RWLOCK
-    if (pthread_rwlock_wrlock(lock) != 0)
+    if (!ossl_assert(pthread_rwlock_wrlock(lock) == 0))
         return 0;
 # else
     if (pthread_mutex_lock(lock) != 0) {