curl: Backport patch to fix buildtools issues

bitbake-selftest was failing on a github url on hosts using buildtools.
The issue was tracked down to the curl upgrade 8.6.0 -> 8.7.1. Whilst there
is a fix in upstream git to workaround the issue in this version, backport
the fix from curl upstream to ensure there are no other related issues to
the bug.

(From OE-Core rev: e956f1116deb93c0d77238a1ebde091b9f1cbc77)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 65 insertions, 0 deletions

diff --git a/meta/recipes-support/curl/curl/721941aadf4adf4f6aeb3f4c0ab489bb89610c36.patch b/meta/recipes-support/curl/curl/721941aadf4adf4f6aeb3f4c0ab489bb89610c36.patch
new file mode 100644
index 0000000000..98f7db93e8
--- /dev/null
+++ b/meta/recipes-support/curl/curl/721941aadf4adf4f6aeb3f4c0ab489bb89610c36.patch
@@ -0,0 +1,64 @@
+From 721941aadf4adf4f6aeb3f4c0ab489bb89610c36 Mon Sep 17 00:00:00 2001
+From: Stefan Eissing <stefan@eissing.org>
+Date: Mon, 1 Apr 2024 15:41:18 +0200
+Subject: [PATCH] http: with chunked POST forced, disable length check on read
+ callback
+
+- when an application forces HTTP/1.1 chunked transfer encoding
+  by setting the corresponding header and instructs curl to use
+  the CURLOPT_READFUNCTION, disregard any POST length information.
+- this establishes backward compatibility with previous curl versions
+
+Applications are encouraged to not force "chunked", but rather
+set length information for a POST. By setting -1, curl will
+auto-select chunked on HTTP/1.1 and work properly on other HTTP
+versions.
+
+Reported-by: Jeff King
+Fixes #13229
+Closes #13257
+Upstream-Status: Backport
+---
+ lib/http.c | 22 ++++++++++++++++++++--
+ 1 file changed, 20 insertions(+), 2 deletions(-)
+
+diff --git a/lib/http.c b/lib/http.c
+index 92c04e69cd8373..a764d3c4403c39 100644
+--- a/lib/http.c
++++ b/lib/http.c
+@@ -2046,8 +2046,19 @@ static CURLcode set_reader(struct Curl_easy *data, Curl_HttpReq httpreq)
+       else
+         result = Curl_creader_set_null(data);
+     }
+-    else { /* we read the bytes from the callback */
+-      result = Curl_creader_set_fread(data, postsize);
++    else {
++      /* we read the bytes from the callback. In case "chunked" encoding
++       * is forced by the application, we disregard `postsize`. This is
++       * a backward compatibility decision to earlier versions where
++       * chunking disregarded this. See issue #13229. */
++      bool chunked = FALSE;
++      char *ptr = Curl_checkheaders(data, STRCONST("Transfer-Encoding"));
++      if(ptr) {
++        /* Some kind of TE is requested, check if 'chunked' is chosen */
++        chunked = Curl_compareheader(ptr, STRCONST("Transfer-Encoding:"),
++                                     STRCONST("chunked"));
++      }
++      result = Curl_creader_set_fread(data, chunked? -1 : postsize);
+     }
+     return result;
+ 
+@@ -2115,6 +2126,13 @@ CURLcode Curl_http_req_set_reader(struct Curl_easy *data,
+     data->req.upload_chunky =
+       Curl_compareheader(ptr,
+                          STRCONST("Transfer-Encoding:"), STRCONST("chunked"));
++    if(data->req.upload_chunky &&
++       Curl_use_http_1_1plus(data, data->conn) &&
++       (data->conn->httpversion >= 20)) {
++       infof(data, "suppressing chunked transfer encoding on connection "
++             "using HTTP version 2 or higher");
++       data->req.upload_chunky = FALSE;
++    }
+   }
+   else {
+     curl_off_t req_clen = Curl_creader_total_length(data);
diff --git a/meta/recipes-support/curl/curl_8.7.1.bb b/meta/recipes-support/curl/curl_8.7.1.bb
index c6654bbad6..c74416d7e9 100644
--- a/meta/recipes-support/curl/curl_8.7.1.bb
+++ b/meta/recipes-support/curl/curl_8.7.1.bb
@@ -11,6 +11,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=eed2e5088e1ac619c9a1c747da291d75"
 
 SRC_URI = " \
     https://curl.se/download/${BP}.tar.xz \
+    file://721941aadf4adf4f6aeb3f4c0ab489bb89610c36.patch \
     file://run-ptest \
     file://disable-tests \
     file://no-test-timeout.patch \