From: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Date: Tue, 23 Sep 2025 11:51:32 +0000 (+0000)
Subject: Fix root cause: validate codec parameters early in tvh_context_setup
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ef040d1818e3cc0aadc2da3e925d948be53bb606;p=thirdparty%2Ftvheadend.git

Fix root cause: validate codec parameters early in tvh_context_setup

Co-authored-by: Flole998 <9951871+Flole998@users.noreply.github.com>
---

diff --git a/src/transcoding/transcode/context.c b/src/transcoding/transcode/context.c
index 6d939e8f0..c2bc8a0e3 100644
--- a/src/transcoding/transcode/context.c
+++ b/src/transcoding/transcode/context.c
@@ -240,6 +240,12 @@ tvh_context_setup(TVHContext *self, const AVCodec *iavcodec, const AVCodec *oavc
     enum AVMediaType media_type = iavcodec->type;
     const char *media_type_name = av_get_media_type_string(media_type);
 
+    if (!iavcodec || !oavcodec) {
+        tvh_stream_log(self->stream, LOG_ERR,
+                       "invalid codec parameters: input=%p output=%p",
+                       iavcodec, oavcodec);
+        return -1;
+    }
     if (!(self->type = tvh_context_type_find(media_type))) {
         tvh_stream_log(self->stream, LOG_ERR,
                        "failed to find context type for '%s' media type",
diff --git a/src/transcoding/transcode/helpers.c b/src/transcoding/transcode/helpers.c
index e54e42066..025512f63 100644
--- a/src/transcoding/transcode/helpers.c
+++ b/src/transcoding/transcode/helpers.c
@@ -70,10 +70,6 @@ tvh_context_helper_find(struct TVHContextHelpers *list, const AVCodec *codec)
 {
     TVHContextHelper *helper = NULL;
 
-    if (!codec) {
-        return NULL;
-    }
-
     SLIST_FOREACH(helper, list, link) {
         if (helper->type == codec->type && helper->id == codec->id) {
             return helper;