From: Nathan Moinvaziri <nathan@solidstatenetworks.com>
Date: Mon, 28 Sep 2020 23:43:50 +0000 (-0700)
Subject: Fixed dereference of possibly null head variable in test_deflate_set_header.
X-Git-Tag: v2.0.0-RC1~44
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=982fc994018c00b323edb33c31ad666724523a20;p=thirdparty%2Fzlib-ng.git

Fixed dereference of possibly null head variable in test_deflate_set_header.

  example.c:920:16: warning: dereference of possibly-NULL ‘head’ [CWE-690] [-Wanalyzer-possible-null-dereference]

  920 |     head->text = 1;
      |     ~~~~~~~~~~~^~~
  ‘test_deflate_set_header’: event 1
    |
    |  906 |     PREFIX(gz_header) *head = calloc(1, sizeof(PREFIX(gz_header)));
    |      |                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    |      |                               |
    |      |                               (1) this call could return NULL
---

diff --git a/test/example.c b/test/example.c
index 4010c91d..97ca0029 100644
--- a/test/example.c
+++ b/test/example.c
@@ -909,6 +909,11 @@ void test_deflate_set_header(unsigned char *compr, size_t comprLen) {
     size_t len = strlen(hello)+1;
 
 
+    if (head == NULL) {
+        printf("out of memory\n");
+        exit(1);
+    }
+
     c_stream.zalloc = zalloc;
     c_stream.zfree = zfree;
     c_stream.opaque = (voidpf)0;