| Message ID | 20230723180303.8000-2-michael@niedermayer.cc |
|---|---|
| State | Accepted |
| Commit | d48476183fad230c8e457b2f314f8e136b973c4e |
| Headers | show |
| Series | [FFmpeg-devel,1/5] avcodec/vmixdec: Check for end of input in decode_dcac() | expand |
| Context | Check | Description |
|---|---|---|
| andriy/configure_x86 | warning | Failed to apply patch |
| yinshiyou/configure_loongarch64 | warning | Failed to apply patch |
diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c index 30aec5e529..b7fab5a4df 100644 --- a/libavcodec/mpeg4videodec.c +++ b/libavcodec/mpeg4videodec.c @@ -295,7 +295,7 @@ void ff_mpeg4_decode_studio(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb int hsub = i ? s->chroma_x_shift : 0; int lowres = s->avctx->lowres; int step = 1 << lowres; - dest_pcm[i] += (linesize[i] / 2) * ((16 >> vsub) - 1); + dest_pcm[i] += (linesize[i] / 2) * ((16 >> vsub + lowres) - 1); for (int h = (16 >> (vsub + lowres)) - 1; h >= 0; h--){ for (int w = (16 >> (hsub + lowres)) - 1, idx = 0; w >= 0; w--, idx += step) dest_pcm[i][w] = src[idx];
Fixes: out of array access Fixes: 59999/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPEG4_fuzzer-5767982157266944 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> --- libavcodec/mpeg4videodec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)