2 files changed, 6 insertions, 4 deletions

diff --git a/src/firejail/restrict_users.c b/src/firejail/restrict_users.c
index 741e908ed..e258f6204 100644
--- a/src/firejail/restrict_users.c
+++ b/src/firejail/restrict_users.c
@@ -210,9 +210,9 @@ static void sanitize_passwd(void) {
                         goto errout;
 
                 // process uid
-                int uid;
+                int uid = -1;
                 int rv = sscanf(ptr, "%d:", &uid);
-                if (rv == 0 || uid < 0)
+                if (rv != 1 || uid < 0)
                         goto errout;
                 assert(uid_min);
                 if (uid < uid_min || uid == 65534) { // on Debian platforms user nobody is 65534
@@ -349,9 +349,9 @@ static void sanitize_group(void) {
                         goto errout;
 
                 // process uid
-                int gid;
+                int gid = -1;
                 int rv = sscanf(ptr, "%d:", &gid);
-                if (rv == 0 || gid < 0)
+                if (rv != 1 || gid < 0)
                         goto errout;
                 assert(gid_min);
                 if (gid < gid_min || gid == 65534) { // on Debian platforms 65534 is group nogroup
diff --git a/src/fnettrace/Makefile b/src/fnettrace/Makefile
index 2ad296d1d..93ce9334d 100644
--- a/src/fnettrace/Makefile
+++ b/src/fnettrace/Makefile
@@ -7,6 +7,8 @@ MOD_DIR = $(ROOT)/src/$(MOD)
 PROG = $(MOD_DIR)/$(MOD)
 TARGET = $(PROG)
 
+CLEANFILES += static-ip-map
+
 include $(ROOT)/src/prog.mk
 
 all: $(TARGET) static-ip-map