1 files changed, 8 insertions, 1 deletions
diff --git a/contrib/tools/pngfix.c b/contrib/tools/pngfix.c
index 9afe09831..54a467daf 100644
--- a/contrib/tools/pngfix.c
+++ b/contrib/tools/pngfix.c
@@ -3961,6 +3961,14 @@ main(int argc, const char **argv)
       {
          size_t outlen = strlen(*argv);
 
+         if (outlen > FILENAME_MAX)
+         {
+            fprintf(stderr, "%s: output file name too long: %s%s%s\n",
+               prog, prefix, *argv, suffix ? suffix : "");
+            global.status_code |= WRITE_ERROR;
+            continue;
+         }
+
          if (outfile == NULL) /* else this takes precedence */
          {
             /* Consider the prefix/suffix options */
@@ -4046,4 +4054,3 @@ main(void)
    return 77;
 }
 #endif /* PNG_SETJMP_SUPPORTED */
-