ffmpeg | branch: master | Michael Niedermayer <[email protected]> | Sun Jul 23 19:01:37 2023 +0200| [d48476183fad230c8e457b2f314f8e136b973c4e] | committer: Michael Niedermayer
avcodec/mpeg4videodec: consider lowres in dest_pcm[] 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 <[email protected]> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d48476183fad230c8e457b2f314f8e136b973c4e --- libavcodec/mpeg4videodec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c index 72bf9eb115..256215cb81 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]; _______________________________________________ ffmpeg-cvslog mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
