[gnutls-devel] GnuTLS | Deadlock in _gnutls_epoch_get on mutex epoch_lock with msmtp and gnutls 3.6.7 (#758)

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jphppd commented:


I had a similar issue with a Yocto-based distribution (version dunfell, gnutls 3.6.14) on an arm i.MX6 target.
Apparently, the following modification

```diff
 static int gnutls_system_mutex_init(void **priv)
 {
-	pthread_mutex_t *lock = malloc(sizeof(pthread_mutex_t));
+	pthread_mutex_t *lock = calloc(1, sizeof(pthread_mutex_t));
	int ret;
```

in [threads.c](https://gitlab.com/gnutls/gnutls/-/blob/3.6.14/lib/system/threads.c#L92) fixes the issue (at least, in my use-case). The reason is not completely clear though, the following call to `pthread_mutex_init` should init the mutex properly.

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