avcodec/allcodecs: Dont play with NULLs

Fixes: member access within null pointer of type 'const FFCodec' (aka 'const struct FFCodec') Fixes: 45726/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-6554445419249664 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Andreas Rheinhardt <[email protected]> Signed-off-by: Michael Niedermayer <[email protected]>
wayveai · Mar 21, 2022 · dd1ce72 · dd1ce72
1 parent 4fdfe43
commit dd1ce72
Showing 1 changed file with 4 additions and 3 deletions.
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
@@ -882,10 +882,11 @@ const AVCodec *av_codec_iterate(void **opaque)
 
     ff_thread_once(&av_codec_static_init, av_codec_init_static);
 
-    if (c)
+    if (c) {
         *opaque = (void*)(i + 1);
-
-    return &c->p;
+        return &c->p;
+    }
+    return NULL;
 }
 
 static enum AVCodecID remap_deprecated_codec_id(enum AVCodecID id)