gstreamer1.0-plugins-base: fix CVE-2025-47807

Upstream-Status: Backport from https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/9e2238adc1cad1fba5aad23bc8c2a6c2a65794d2

(From OE-Core rev: 19eca5d7373667dbacd02a2c1dd8c9de8101cd34)

Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/recipes-multimedia/gstreamer/gstreamer1.0-plugins-base/CVE-2025-47807.patch

@@ -0,0 +1,49 @@
+From 9e2238adc1cad1fba5aad23bc8c2a6c2a65794d2 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
+Date: Thu, 8 May 2025 09:14:15 +0300
+Subject: [PATCH] subparse: Check for valid UTF-8 before cleaning up lines and
+ check for regex replace errors
+
+Fixes https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/4418
+Fixes CVE-2025-47807
+
+Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/9132>
+
+CVE: CVE-2025-47807
+Upstream-Status: Backport [https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/9e2238adc1cad1fba5aad23bc8c2a6c2a65794d2]
+Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com>
+---
+ gst/subparse/gstsubparse.c | 10 ++++++++++
+ 1 file changed, 10 insertions(+)
+
+diff --git a/gst/subparse/gstsubparse.c b/gst/subparse/gstsubparse.c
+index 035068d..72bf104 100644
+--- a/gst/subparse/gstsubparse.c
++++ b/gst/subparse/gstsubparse.c
+@@ -666,6 +666,12 @@ subrip_unescape_formatting (gchar * txt, gconstpointer allowed_tags_ptr,
+   res = g_regex_replace (tag_regex, txt, strlen (txt), 0,
+       replace_pattern, 0, NULL);
+ 
++  /* Replacing can fail. Return an empty string in that case. */
++  if (!res) {
++    strcpy (txt, "");
++    return;
++  }
++
+   /* res will always be shorter than the input or identical, so this
+    * copy is OK */
+   strcpy (txt, res);
+@@ -1046,6 +1052,10 @@ parse_subrip (ParserState * state, const gchar * line)
+         g_string_append_c (state->buf, '\n');
+       g_string_append (state->buf, line);
+       if (strlen (line) == 0) {
++        if (!g_utf8_validate (state->buf->str, state->buf->len, NULL)) {
++          g_string_truncate (state->buf, 0);
++          return NULL;
++        }
+         ret = g_markup_escape_text (state->buf->str, state->buf->len);
+         g_string_truncate (state->buf, 0);
+         state->state = 0;
+-- 
+2.50.1
+

meta/recipes-multimedia/gstreamer/gstreamer1.0-plugins-base_1.22.12.bb

@@ -21,6 +21,7 @@ SRC_URI = "https://gstreamer.freedesktop.org/src/gst-plugins-base/gst-plugins-ba
            file://0012-subparse-Check-for-NULL-return-of-strchr-when-parsin.patch \
            file://CVE-2025-47808.patch \
            file://CVE-2025-47806.patch \
+           file://CVE-2025-47807.patch \
            "
 SRC_URI[sha256sum] = "73cfadc3a6ffe77ed974cfd6fb391c605e4531f48db21dd6b9f42b8cb69bd8c1"