Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(revision 103333)
+++ channels/chan_sip.c	(working copy)
@@ -2198,7 +2198,7 @@
 			if (req.socket.lock) 
 				ast_mutex_lock(req.socket.lock);
 			if (!fgets(buf, sizeof(buf), ser->f))
-				goto cleanup;
+				goto cleanupunlock;
 			if (req.socket.lock) 
 				ast_mutex_unlock(req.socket.lock);
 			if (me->stop) 
@@ -2212,7 +2212,7 @@
 				if (req.socket.lock) 
 					ast_mutex_lock(req.socket.lock);
 				if (!fread(buf, (cl < sizeof(buf)) ? cl : sizeof(buf), 1, ser->f))
-					goto cleanup;
+					goto cleanupunlock;
 				if (req.socket.lock) 
 					ast_mutex_unlock(req.socket.lock);
 				if (me->stop)
@@ -2226,6 +2226,9 @@
 		handle_request_do(&req, &ser->requestor);
 	}
 
+cleanupunlock:
+	if (req.socket.lock) 
+		ast_mutex_unlock(req.socket.lock);
 cleanup:
 	AST_LIST_LOCK(&threadl);
 	AST_LIST_REMOVE(&threadl, me, list);