[FFmpeg-cvslog] tools/target_dec_fuzzer: Check that FFv1 doesnt leave uninitialized memory in its buffers

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Mon Aug 12 15:23:56 2024 +0200| [e40b23c52abe3356effa552549b2e989708a6e70] | committer: Michael Niedermayer

tools/target_dec_fuzzer: Check that FFv1 doesnt leave uninitialized memory in its buffers

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e40b23c52abe3356effa552549b2e989708a6e70
---

 tools/target_dec_fuzzer.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/tools/target_dec_fuzzer.c b/tools/target_dec_fuzzer.c
index 794b5b92cc..5fccf2ab8f 100644
--- a/tools/target_dec_fuzzer.c
+++ b/tools/target_dec_fuzzer.c
@@ -129,7 +129,14 @@ static int fuzz_video_get_buffer(AVCodecContext *ctx, AVFrame *frame)
 
     frame->extended_data = frame->data;
     for (i = 0; i < 4 && size[i]; i++) {
-        frame->buf[i] = av_buffer_allocz(size[i]);
+        switch(ctx->codec_id) {
+        case AV_CODEC_ID_FFV1:
+            frame->buf[i] = av_buffer_alloc(size[i]);
+        break;
+        default:
+            frame->buf[i] = av_buffer_allocz(size[i]);
+        }
+
         if (!frame->buf[i])
             goto fail;
         frame->data[i] = frame->buf[i]->data;