diff --git a/pjlib/src/pj/log.c b/pjlib/src/pj/log.c
index a2951d6dd..73b4d45b7 100644
--- a/pjlib/src/pj/log.c
+++ b/pjlib/src/pj/log.c
@@ -151,14 +151,17 @@ pj_status_t pj_log_init(void)
     if (thread_suspended_tls_id == -1) {
         pj_status_t status;
         status = pj_thread_local_alloc(&thread_suspended_tls_id);
-        if (status != PJ_SUCCESS)
+        if (status != PJ_SUCCESS) {
+            thread_suspended_tls_id = -1;
             return status;
+        }
 
 #  if PJ_LOG_ENABLE_INDENT
         status = pj_thread_local_alloc(&thread_indent_tls_id);
         if (status != PJ_SUCCESS) {
             pj_thread_local_free(thread_suspended_tls_id);
             thread_suspended_tls_id = -1;
+            thread_indent_tls_id = -1;
             return status;
         }
 #  endif
diff --git a/pjlib/src/pj/os_core_win32.c b/pjlib/src/pj/os_core_win32.c
index 99f9c320b..3c0db2e1c 100644
--- a/pjlib/src/pj/os_core_win32.c
+++ b/pjlib/src/pj/os_core_win32.c
@@ -918,6 +918,7 @@ PJ_DEF(pj_atomic_value_t) pj_atomic_add_and_get( pj_atomic_t *atomic_var,
  */
 PJ_DEF(pj_status_t) pj_thread_local_alloc(long *index)
 {
+    DWORD tls_index;
     PJ_ASSERT_RETURN(index != NULL, PJ_EINVAL);
 
     //Can't check stack because this function is called in the
@@ -925,15 +926,17 @@ PJ_DEF(pj_status_t) pj_thread_local_alloc(long *index)
     //PJ_CHECK_STACK();
 
 #if defined(PJ_WIN32_WINPHONE8) && PJ_WIN32_WINPHONE8
-    *index = TlsAllocRT();
+    tls_index = TlsAllocRT();
 #else
-    *index = TlsAlloc();
+    tls_index = TlsAlloc();
 #endif
 
-    if (*index == TLS_OUT_OF_INDEXES)
+    if (tls_index == TLS_OUT_OF_INDEXES)
         return PJ_RETURN_OS_ERROR(GetLastError());
-    else
+    else {
+        *index = (long)tls_index;
         return PJ_SUCCESS;
+    }
 }
 
 /*
diff --git a/pjlib/src/pj/pool_caching.c b/pjlib/src/pj/pool_caching.c
index 0e665a6b3..9d3abdf95 100644
--- a/pjlib/src/pj/pool_caching.c
+++ b/pjlib/src/pj/pool_caching.c
@@ -17,6 +17,7 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
  */
 #include <pj/pool.h>
+#include <pj/assert.h>
 #include <pj/log.h>
 #include <pj/string.h>
 #include <pj/assert.h>
@@ -55,6 +56,7 @@ PJ_DEF(void) pj_caching_pool_init( pj_caching_pool *cp,
 {
     int i;
     pj_pool_t *pool;
+    pj_status_t status;
 
     PJ_CHECK_STACK();
 
@@ -77,7 +79,10 @@ PJ_DEF(void) pj_caching_pool_init( pj_caching_pool *cp,
     cp->factory.on_block_free = &cpool_on_block_free;
 
     pool = pj_pool_create_on_buf("cachingpool", cp->pool_buf, sizeof(cp->pool_buf));
-    pj_lock_create_simple_mutex(pool, "cachingpool", &cp->lock);
+    status = pj_lock_create_simple_mutex(pool, "cachingpool", &cp->lock);
+    /* This mostly serves to silent coverity warning about unchecked 
+     * return value. There's not much we can do if it fails. */
+    PJ_ASSERT_ON_FAIL(status==PJ_SUCCESS, return);
 }
 
 PJ_DEF(void) pj_caching_pool_destroy( pj_caching_pool *cp )
diff --git a/pjlib/src/pj/string.c b/pjlib/src/pj/string.c
index d48823e7e..4d001f1a2 100644
--- a/pjlib/src/pj/string.c
+++ b/pjlib/src/pj/string.c
@@ -275,11 +275,10 @@ PJ_DEF(pj_status_t) pj_strtol2(const pj_str_t *str, long *value)
 
     PJ_CHECK_STACK();
 
-    PJ_ASSERT_RETURN(str->slen >= 0, PJ_EINVAL);
-
     if (!str || !value) {
         return PJ_EINVAL;
     }
+    PJ_ASSERT_RETURN(str->slen >= 0, PJ_EINVAL);
 
     s = *str;
     pj_strltrim(&s);
@@ -380,12 +379,11 @@ PJ_DEF(pj_status_t) pj_strtoul3(const pj_str_t *str, unsigned long *value,
 
     PJ_CHECK_STACK();
 
-    PJ_ASSERT_RETURN(str->slen >= 0, PJ_EINVAL);
-
     if (!str || !value) {
         return PJ_EINVAL;
     }
-
+    PJ_ASSERT_RETURN(str->slen >= 0, PJ_EINVAL);
+    
     s = *str;
     pj_strltrim(&s);
 
diff --git a/pjlib/src/pjlib-test/activesock.c b/pjlib/src/pjlib-test/activesock.c
index 54733fbb5..29f811766 100644
--- a/pjlib/src/pjlib-test/activesock.c
+++ b/pjlib/src/pjlib-test/activesock.c
@@ -98,7 +98,6 @@ static pj_status_t udp_echo_srv_create(pj_pool_t *pool,
                                        struct udp_echo_srv **p_srv)
 {
     struct udp_echo_srv *srv;
-    pj_sock_t sock_fd = PJ_INVALID_SOCKET;
     pj_sockaddr addr;
     pj_activesock_cb activesock_cb;
     pj_status_t status;
@@ -114,7 +113,6 @@ static pj_status_t udp_echo_srv_create(pj_pool_t *pool,
     status = pj_activesock_create_udp(pool, &addr, NULL, ioqueue, &activesock_cb, 
                                       srv, &srv->asock, &addr);
     if (status != PJ_SUCCESS) {
-        pj_sock_close(sock_fd);
         udp_echo_err("pj_activesock_create()", status);
         return status;
     }
diff --git a/pjlib/src/pjlib-test/ioq_stress_test.c b/pjlib/src/pjlib-test/ioq_stress_test.c
index 6a0778fd9..0eae04b25 100644
--- a/pjlib/src/pjlib-test/ioq_stress_test.c
+++ b/pjlib/src/pjlib-test/ioq_stress_test.c
@@ -728,8 +728,10 @@ static int perform_test(test_desc *test)
 on_return:
     if (test->state.ioq)
         pj_ioqueue_destroy(test->state.ioq);
-    pj_grp_lock_dec_ref(test->state.grp_lock);
-    test->state.grp_lock = NULL;
+    if (test->state.grp_lock) {
+        pj_grp_lock_dec_ref(test->state.grp_lock);
+        test->state.grp_lock = NULL;
+    }
     if (test->state.pool)
         pj_pool_release(test->state.pool);
 
diff --git a/pjlib/src/pjlib-test/ioq_udp.c b/pjlib/src/pjlib-test/ioq_udp.c
index bf1432510..ec5248ad0 100644
--- a/pjlib/src/pjlib-test/ioq_udp.c
+++ b/pjlib/src/pjlib-test/ioq_udp.c
@@ -1153,9 +1153,9 @@ static int bench_test(const pj_ioqueue_cfg *cfg, int bufsize,
 on_error:
     PJ_LOG(1,(THIS_FILE, "...ERROR: %s", 
               pj_strerror(pj_get_netos_error(), errbuf, sizeof(errbuf))));
-    if (ssock)
+    if (ssock > 0)
         pj_sock_close(ssock);
-    if (csock)
+    if (csock > 0)
         pj_sock_close(csock);
     for (i=0; i<inactive_sock_count && inactive_sock && 
               inactive_sock[i]!=PJ_INVALID_SOCKET; ++i) 
diff --git a/pjlib/src/pjlib-test/sleep.c b/pjlib/src/pjlib-test/sleep.c
index f5d617882..792e06bbe 100644
--- a/pjlib/src/pjlib-test/sleep.c
+++ b/pjlib/src/pjlib-test/sleep.c
@@ -122,6 +122,10 @@ static int sleep_duration_test(void)
 
         /* Mark end of test. */
         rc = pj_gettimeofday(&stop);
+        if (rc != PJ_SUCCESS) {
+            app_perror("...error: pj_gettimeofday()", rc);
+            return -22;
+        }
 
         /* Calculate duration (store in stop). */
         PJ_TIME_VAL_SUB(stop, start);
diff --git a/pjlib/src/pjlib-test/sock.c b/pjlib/src/pjlib-test/sock.c
index 88308073a..9a8f7b6e4 100644
--- a/pjlib/src/pjlib-test/sock.c
+++ b/pjlib/src/pjlib-test/sock.c
@@ -512,8 +512,10 @@ static int send_recv_test(int sock_type,
             return -151;
         if (pj_sockaddr_cmp(&addr, srcaddr) != 0) {
             char srcaddr_str[32], addr_str[32];
-            strcpy(srcaddr_str, pj_inet_ntoa(srcaddr->sin_addr));
-            strcpy(addr_str, pj_inet_ntoa(addr.sin_addr));
+            pj_ansi_strncpy(srcaddr_str, pj_inet_ntoa(srcaddr->sin_addr), 
+                            sizeof(srcaddr_str));
+            pj_ansi_strncpy(addr_str, pj_inet_ntoa(addr.sin_addr),
+                            sizeof(addr_str));
             PJ_LOG(3,("test", "...error: src address mismatch (original=%s, "
                               "recvfrom addr=%s)", 
                               srcaddr_str, addr_str));
diff --git a/pjlib/src/pjlib-test/timer.c b/pjlib/src/pjlib-test/timer.c
index 94725afad..e307ca1fc 100644
--- a/pjlib/src/pjlib-test/timer.c
+++ b/pjlib/src/pjlib-test/timer.c
@@ -436,6 +436,7 @@ static int poll_worker(void *arg)
     return 0;
 }
 
+#if ST_CANCEL_THREAD_COUNT
 /* Cancel worker thread function. */
 static int cancel_worker(void *arg)
 {
@@ -466,6 +467,7 @@ static int cancel_worker(void *arg)
 
     return 0;
 }
+#endif
 
 static int timer_stress_test(void)
 {
@@ -627,11 +629,11 @@ static int timer_stress_test(void)
     }
 
     /* Start cancel worker threads */
-    if (ST_CANCEL_THREAD_COUNT) {
-        cancel_threads = (pj_thread_t**)
-                          pj_pool_calloc(pool, ST_CANCEL_THREAD_COUNT,
-                                         sizeof(pj_thread_t*));
-    }
+#if ST_CANCEL_THREAD_COUNT
+    cancel_threads = (pj_thread_t**)
+                        pj_pool_calloc(pool, ST_CANCEL_THREAD_COUNT,
+                                        sizeof(pj_thread_t*));
+
     for (i=0; i<ST_CANCEL_THREAD_COUNT; ++i) {
         status = pj_thread_create( pool, "cancel", &cancel_worker, &tparam,
                                    0, 0, &cancel_threads[i]);
@@ -641,6 +643,7 @@ static int timer_stress_test(void)
             goto on_return;
         }
     }
+#endif
 
 #if SIMULATE_CRASH
     tmp_pool = pj_pool_create( mem, NULL, 4096, 128, NULL);
@@ -668,7 +671,7 @@ on_return:
     tparam.stopping = PJ_TRUE;
     
     for (i=0; i<ST_STRESS_THREAD_COUNT; ++i) {
-        if (!stress_threads[i])
+        if (!stress_threads || !stress_threads[i])
             continue;
         pj_thread_join(stress_threads[i]);
         pj_thread_destroy(stress_threads[i]);