Date: Thu, 3 Sep 2015 15:44:57 +0300 From: Eugene <e.yudin@...systems.com> To: musl@...ts.openwall.com Subject: Using PTHREAD_MUTEX_RECURSIVE and PTHREAD_MUTEX_ERRORCHECK leads to segmentation fault Hello, I have problem with mutexes of type PTHREAD_MUTEX_RECURSIVE and PTHREAD_MUTEX_ERRORCHECK. Using this mutexes sometimes leads to segmentation fault in functions __pthread_mutex_trylock_owner() and __pthread_mutex_unlock(). Problem is floating and very bad reproducible with library PJSIP. Broken places are following. __pthread_mutex_unlock(): 24 if (next != &self->robust_list.head) *(volatile void *volatile *) 25 ((char *)next - sizeof(void *)) = prev; __pthread_mutex_trylock_owner(): 37 if (next != &self->robust_list.head) *(volatile void *volatile *) 38 ((char *)next - sizeof(void *)) = &m->_m_next; GCC: 4.9.2 Version: 1.1.10 Architeture: MIPS (little endian) Best regards, Eugene
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