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| author | Michael Niedermayer <michael@niedermayer.cc> | 2025-07-23 21:25:37 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2025-07-28 17:41:38 +0200 |
| commit | a45755e302baf56461bd7d8cf0c3a88c0ee5e83f (patch) | |
| tree | b47e602bf49fa42ec147e81b81fbcaf64d2575ca | |
| parent | 909229b880d5f2c2277ab10915954b18d5162322 (diff) | |
| download | ffmpeg-a45755e302baf56461bd7d8cf0c3a88c0ee5e83f.tar.gz | |
avcodec/dxvenc: Clear width to linesize not linesize to linesize
Fixes: use of uninitialized memory
Fixes: 422217206/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DXV_fuzzer-4786889444098048
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/dxvenc.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libavcodec/dxvenc.c b/libavcodec/dxvenc.c index f5cef4f2e1..0a2dd8077b 100644 --- a/libavcodec/dxvenc.c +++ b/libavcodec/dxvenc.c @@ -197,8 +197,9 @@ static int dxv_encode(AVCodecContext *avctx, AVPacket *pkt, avctx->height); if (avctx->width != DXV_ALIGN(avctx->width)) { + av_assert0(frame->format == AV_PIX_FMT_RGBA); for (int y = 0; y < avctx->height; y++) { - memset(safe_data[0] + y * safe_linesize[0] + frame->linesize[0], 0, safe_linesize[0] - frame->linesize[0]); + memset(safe_data[0] + y * safe_linesize[0] + 4*avctx->width, 0, safe_linesize[0] - 4*avctx->width); } } if (avctx->height != DXV_ALIGN(avctx->height)) { |