From c991e5472ef23db6b02abb2f54f53235f9b5ecbe Mon Sep 17 00:00:00 2001 From: Diederik de Groot Date: Thu, 21 Apr 2016 15:26:47 +0200 Subject: lock.c: Check *lt before dereferencing it *lt is NULL if t->tracking == 0 ASTERISK-25948 #close Change-Id: I4a81af28f9c82a74aa82413d772a7dc8fa6f45ba --- main/lock.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) (limited to 'main') diff --git a/main/lock.c b/main/lock.c index 13b8fb388..2b2a80984 100644 --- a/main/lock.c +++ b/main/lock.c @@ -286,17 +286,19 @@ int __ast_pthread_mutex_lock(const char *filename, int lineno, const char *func, if (wait_time > reported_wait && (wait_time % 5) == 0) { __ast_mutex_logger("%s line %d (%s): Deadlock? waited %d sec for mutex '%s'?\n", filename, lineno, func, (int) wait_time, mutex_name); - ast_reentrancy_lock(lt); + if (lt) { + ast_reentrancy_lock(lt); #ifdef HAVE_BKTR - __dump_backtrace(<->backtrace[lt->reentrancy], canlog); + __dump_backtrace(<->backtrace[lt->reentrancy], canlog); #endif - __ast_mutex_logger("%s line %d (%s): '%s' was locked here.\n", - lt->file[ROFFSET], lt->lineno[ROFFSET], - lt->func[ROFFSET], mutex_name); + __ast_mutex_logger("%s line %d (%s): '%s' was locked here.\n", + lt->file[ROFFSET], lt->lineno[ROFFSET], + lt->func[ROFFSET], mutex_name); #ifdef HAVE_BKTR - __dump_backtrace(<->backtrace[ROFFSET], canlog); + __dump_backtrace(<->backtrace[ROFFSET], canlog); #endif - ast_reentrancy_unlock(lt); + ast_reentrancy_unlock(lt); + } reported_wait = wait_time; } usleep(200); -- cgit v1.2.3