http_aws_sigv4: skip the op if the query pair is zero bytes

Follow-up to fc76a24 Spotted by OSS-Fuzz Bug: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=62175 Closes #11823
curl · Sep 8, 2023 · 16bdc09 · 16bdc09
1 parent 4600bd3
commit 16bdc09
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/lib/http_aws_sigv4.c b/lib/http_aws_sigv4.c
@@ -422,6 +422,8 @@ static CURLcode canon_query(struct Curl_easy *data,
   for(i = 0; !result && (i < entry); i++, ap++) {
     size_t len;
     const char *q = ap->p;
+    if(!ap->len)
+      continue;
     for(len = ap->len; len && !result; q++, len--) {
       if(ISALNUM(*q))
         result = Curl_dyn_addn(dq, q, 1);