disallow zero seconds timeout

1 files changed, 6 insertions, 1 deletions

diff --git a/src/firejail/util.c b/src/firejail/util.c
index 6b30ab5fe..f1c4f7059 100644
--- a/src/firejail/util.c
+++ b/src/firejail/util.c
@@ -1093,8 +1093,13 @@ unsigned extract_timeout(const char *str) {
                 fprintf(stderr, "Error: invalid timeout, please use a hh:mm:ss format\n");
                 exit(1);
         }
+        unsigned timeout = h * 3600 + m * 60 + s;
+        if (timeout == 0) {
+                fprintf(stderr, "Error: invalid timeout\n");
+                exit(1);
+        }
 
-        return h * 3600 + m * 60 + s;
+        return timeout;
 }
 
 void disable_file_or_dir(const char *fname) {