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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-07-24 22:55:15 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-07-27 01:43:00 +0200 |
| commit | 47b6ca0b022a413e392707464f2423795aa89bfb (patch) | |
| tree | f4239b91c099116e8bed3f4733eceed172b7cd03 /libavcodec | |
| parent | 38b6c48c4300343f4703019a90a332773e64e11b (diff) | |
| download | ffmpeg-47b6ca0b022a413e392707464f2423795aa89bfb.tar.gz | |
avcodec/assdec: undefined use of memcpy()
Fixes: null pointer passed as argument 2, which is declared to never be null
Fixes: 16008/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SSA_fuzzer-5650582821404672 (this is a separate issue found in this testcase)
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/assdec.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libavcodec/assdec.c b/libavcodec/assdec.c index 3178f2953c..f0b1069cd2 100644 --- a/libavcodec/assdec.c +++ b/libavcodec/assdec.c @@ -31,7 +31,8 @@ static av_cold int ass_decode_init(AVCodecContext *avctx) avctx->subtitle_header = av_malloc(avctx->extradata_size + 1); if (!avctx->subtitle_header) return AVERROR(ENOMEM); - memcpy(avctx->subtitle_header, avctx->extradata, avctx->extradata_size); + if (avctx->extradata_size) + memcpy(avctx->subtitle_header, avctx->extradata, avctx->extradata_size); avctx->subtitle_header[avctx->extradata_size] = 0; avctx->subtitle_header_size = avctx->extradata_size; return 0; |