1 files changed, 96 insertions, 0 deletions
diff --git a/backport-CVE-2024-2398.patch b/backport-CVE-2024-2398.patch
new file mode 100644
index 0000000..c3128b1
--- /dev/null
+++ b/backport-CVE-2024-2398.patch
@@ -0,0 +1,96 @@
+From deca8039991886a559b67bcd6701db800a5cf764 Mon Sep 17 00:00:00 2001
+From: Stefan Eissing <stefan@eissing.org>
+Date: Wed, 6 Mar 2024 09:36:08 +0100
+Subject: [PATCH] http2: push headers better cleanup
+
+- provide common cleanup method for push headers
+
+Closes #13054
+
+Conflict:struct h2_stream_ctx *stream => struct stream_ctx *stream
+Context adapt
+Reference:https://github.com/curl/curl/commit/deca8039991886a559b67bcd6701db800a5cf764
+---
+ lib/http2.c | 34 +++++++++++++++-------------------
+ 1 file changed, 15 insertions(+), 19 deletions(-)
+
+diff --git a/lib/http2.c b/lib/http2.c
+index c63ecd383..96868728a 100644
+--- a/lib/http2.c
++++ b/lib/http2.c
+@@ -271,6 +271,15 @@ static CURLcode http2_data_setup(struct Curl_cfilter *cf,
+   return CURLE_OK;
+ }
+ 
++static void free_push_headers(struct stream_ctx *stream)
++{
++  size_t i;
++  for(i = 0; i<stream->push_headers_used; i++)
++    free(stream->push_headers[i]);
++  Curl_safefree(stream->push_headers);
++  stream->push_headers_used = 0;
++}
++
+ static void http2_data_done(struct Curl_cfilter *cf,
+                             struct Curl_easy *data, bool premature)
+ {
+@@ -306,15 +315,7 @@ static void http2_data_done(struct Curl_cfilter *cf,
+   Curl_bufq_free(&stream->recvbuf);
+   Curl_h1_req_parse_free(&stream->h1);
+   Curl_dynhds_free(&stream->resp_trailers);
+-  if(stream->push_headers) {
+-    /* if they weren't used and then freed before */
+-    for(; stream->push_headers_used > 0; --stream->push_headers_used) {
+-      free(stream->push_headers[stream->push_headers_used - 1]);
+-    }
+-    free(stream->push_headers);
+-    stream->push_headers = NULL;
+-  }
+-
++  free_push_headers(stream);
+   free(stream);
+   H2_STREAM_LCTX(data) = NULL;
+ }
+@@ -860,7 +861,6 @@ static int push_promise(struct Curl_cfilter *cf,
+     struct curl_pushheaders heads;
+     CURLMcode rc;
+     CURLcode result;
+-    size_t i;
+     /* clone the parent */
+     struct Curl_easy *newhandle = h2_duphandle(cf, data);
+     if(!newhandle) {
+@@ -905,11 +905,7 @@ static int push_promise(struct Curl_cfilter *cf,
+     Curl_set_in_callback(data, false);
+ 
+     /* free the headers again */
+-    for(i = 0; i<stream->push_headers_used; i++)
+-      free(stream->push_headers[i]);
+-    free(stream->push_headers);
+-    stream->push_headers = NULL;
+-    stream->push_headers_used = 0;
++    free_push_headers(stream);
+ 
+     if(rv) {
+       DEBUGASSERT((rv > CURL_PUSH_OK) && (rv <= CURL_PUSH_ERROROUT));
+@@ -1430,14 +1426,14 @@ static int on_header(nghttp2_session *session, const nghttp2_frame *frame,
+       if(stream->push_headers_alloc > 1000) {
+         /* this is beyond crazy many headers, bail out */
+         failf(data_s, "Too many PUSH_PROMISE headers");
+-        Curl_safefree(stream->push_headers);
++        free_push_headers(stream);
+         return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
+       }
+       stream->push_headers_alloc *= 2;
+-      headp = Curl_saferealloc(stream->push_headers,
+-                               stream->push_headers_alloc * sizeof(char *));
++      headp = realloc(stream->push_headers,
++                      stream->push_headers_alloc * sizeof(char *));
+       if(!headp) {
+-        stream->push_headers = NULL;
++        free_push_headers(stream);
+         return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
+       }
+       stream->push_headers = headp;
+-- 
+2.33.0
+