curl: Fix CVE-2022-42915

HTTP proxy double-free

Link: https://security-tracker.debian.org/tracker/CVE-2022-42915

(From OE-Core rev: 4754f33d7ec96f72351853463540c8b1a3f4bc0c)

Signed-off-by: Bhabu Bindu <bhabu.bindu@kpit.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-support/curl/curl/CVE-2022-42915.patch

@@ -0,0 +1,53 @@
+From 55e1875729f9d9fc7315cec611bffbd2c817ad89 Mon Sep 17 00:00:00 2001
+From: Daniel Stenberg <daniel@haxx.se>
+Date: Thu, 6 Oct 2022 14:13:36 +0200
+Subject: [PATCH] http_proxy: restore the protocol pointer on error
+
+Reported-by: Trail of Bits
+
+Closes #9790
+
+CVE: CVE-2022-42915
+Upstream-Status: Backport [https://github.com/curl/curl/commit/55e1875729f9d9fc7315cec611bffbd2c817ad89]
+Signed-off-by: Bhabu Bindu <bhabu.bindu@kpit.com>
+---
+ lib/http_proxy.c | 6 ++----
+ lib/url.c        | 9 ---------
+ 2 files changed, 2 insertions(+), 13 deletions(-)
+
+diff --git a/lib/http_proxy.c b/lib/http_proxy.c
+index 1f87f6c62aa40..cc20b3a801941 100644
+--- a/lib/http_proxy.c
++++ b/lib/http_proxy.c
+@@ -212,10 +212,8 @@ void Curl_connect_done(struct Curl_easy *data)
+     Curl_dyn_free(&s->rcvbuf);
+     Curl_dyn_free(&s->req);
+ 
+-    /* restore the protocol pointer, if not already done */
+-    if(s->prot_save)
+-      data->req.p.http = s->prot_save;
+-    s->prot_save = NULL;
++    /* restore the protocol pointer */
++    data->req.p.http = s->prot_save;
+     data->info.httpcode = 0; /* clear it as it might've been used for the
+                                 proxy */
+     data->req.ignorebody = FALSE;
+diff --git a/lib/url.c b/lib/url.c
+index 690c53c81a3c1..be5ffca2d8b20 100644
+--- a/lib/url.c
++++ b/lib/url.c
+@@ -751,15 +751,6 @@ static void conn_shutdown(struct Curl_easy *data, struct connectdata *conn)
+   DEBUGASSERT(data);
+   infof(data, "Closing connection %ld", conn->connection_id);
+ 
+-#ifndef USE_HYPER
+-  if(conn->connect_state && conn->connect_state->prot_save) {
+-    /* If this was closed with a CONNECT in progress, cleanup this temporary
+-       struct arrangement */
+-    data->req.p.http = NULL;
+-    Curl_safefree(conn->connect_state->prot_save);
+-  }
+-#endif
+-
+   /* possible left-overs from the async name resolvers */
+   Curl_resolver_cancel(data);

meta/recipes-support/curl/curl_7.82.0.bb

@@ -31,6 +31,7 @@ SRC_URI = "https://curl.se/download/${BP}.tar.xz \
            file://CVE-2022-35252.patch \
            file://CVE-2022-32221.patch \
            file://CVE-2022-42916.patch \
+           file://CVE-2022-42915.patch \
            "
 SRC_URI[sha256sum] = "0aaa12d7bd04b0966254f2703ce80dd5c38dbbd76af0297d3d690cdce58a583c"