diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-12-03 23:41:10 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-09 13:53:29 +0200 |
| commit | 62dd7e3dc06d12364b820317ce301b9c6684595c (patch) | |
| tree | 2f71e156fca5225237fcab76c6243509b1874f2e | |
| parent | f8940d51047c1adce67c30a2f274dd9d08272664 (diff) | |
| download | ffmpeg-62dd7e3dc06d12364b820317ce301b9c6684595c.tar.gz | |
avcodec/rasc: Check frame before clearing
Fixes: null pointer dereference
Fixes: 27737/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RASC_fuzzer-5769028685266944
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 380a3a0adfae7aa898d2ec8a5b0d5cd949a11111)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/rasc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/rasc.c b/libavcodec/rasc.c index 21fc43f325..598bb395b4 100644 --- a/libavcodec/rasc.c +++ b/libavcodec/rasc.c @@ -70,6 +70,9 @@ static void clear_plane(AVCodecContext *avctx, AVFrame *frame) RASCContext *s = avctx->priv_data; uint8_t *dst = frame->data[0]; + if (!dst) + return; + for (int y = 0; y < avctx->height; y++) { memset(dst, 0, avctx->width * s->bpp); dst += frame->linesize[0]; |