3 files changed, 5 insertions, 1 deletions

diff --git a/src/firejail/fs_whitelist.c b/src/firejail/fs_whitelist.c
index 59dff5517..43a9269ff 100644
--- a/src/firejail/fs_whitelist.c
+++ b/src/firejail/fs_whitelist.c
@@ -567,6 +567,10 @@ void fs_whitelist(void) {
                 free(fname);
                 entry = entry->next;
         }
+        
+        // release nowhitelist memory
+        assert(nowhitelist);
+        free(nowhitelist);
                 
         // /home/user
         if (home_dir) {
diff --git a/src/firejail/util.c b/src/firejail/util.c
index 88fa67183..901ea87db 100644
--- a/src/firejail/util.c
+++ b/src/firejail/util.c
@@ -421,7 +421,6 @@ char *split_comma(char *str) {
 
 void check_unsigned(const char *str, const char *msg) {
         EUID_ASSERT();
-        int rv = 0;
         const char *ptr = str;
         while (*ptr != ' ' && *ptr != '\t' && *ptr != '\0') {
                 if (!isdigit(*ptr)) {
diff --git a/src/firejail/x11.c b/src/firejail/x11.c
index b72b46f0d..da881f344 100644
--- a/src/firejail/x11.c
+++ b/src/firejail/x11.c
@@ -356,6 +356,7 @@ void x11_start_xvfb(int argc, char **argv) {
                 (void) rv;
         }
 
+        assert(display_str);
         setenv("DISPLAY", display_str, 1);
         // run attach command
         jail = fork();