commit cc8b433532d9997081f1b9e7590ce8c90996e5be

Author: Micha? Janiszewski <janisozaur+signed@gmail.com> Date: Fri Sep 28 20:52:21 2018 +0200 PNM: Improve checks when loading a file
libsdl-org · Sep 29, 2018 · b8a008d · b8a008d
1 parent 0596ee9
commit b8a008d
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/IMG_pnm.c b/IMG_pnm.c
@@ -86,7 +86,14 @@ static int ReadNumber(SDL_RWops *src)
     } while ( SDL_isspace(ch) );
 
     /* Add up the number */
+    if (!SDL_isdigit(ch)) {
+        return -1;
+    }
     do {
+        /* Protect from possible overflow */
+        if (number >= INT32_MAX / 10) {
+            return -1;
+        }
         number *= 10;
         number += ch-'0';