1 files changed, 8 insertions, 1 deletions

diff --git a/src/solvers/h48/utils.h b/src/solvers/h48/utils.h
index 682eb1d..27fb2e5 100644
--- a/src/solvers/h48/utils.h
+++ b/src/solvers/h48/utils.h
@@ -12,7 +12,7 @@ parse_h48h(const char *buf, uint8_t h[static 1])
 {
         char format_error_msg[100];
         sprintf(format_error_msg, "[H48] Error parsing H48 solver: must be in "
-            "'h48h*' format, but got '%s'\n", buf);
+            "'h48hNN' format, but got '%s'\n", buf);
 
         buf += 3;
 
@@ -22,6 +22,13 @@ parse_h48h(const char *buf, uint8_t h[static 1])
         }
         buf++;
 
+        if (strlen(buf) > 2 ||
+            (strlen(buf) >= 1 && *buf < '1' && *buf > '9') ||
+            (strlen(buf) == 2 && *buf < '0' && *buf > '9')) {
+                LOG(format_error_msg);
+                goto parse_h48h_error;
+        }
+
         *h = atoi(buf);
         if (*h > H48_HMAX) {
                 LOG("[H48] Invalid value %" PRIu8 " for parameter h (must be "