ffmpeg | branch: master | Michael Niedermayer <mich...@niedermayer.cc> | Thu Mar 17 22:52:52 2022 +0100| [b59ea948cdcb8422964595c32076312756550f17] | committer: Michael Niedermayer
avcodec/dfpwmdec: Check packet size more completely Fixes: out of array access Fixes: 45497/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DFPWM_fuzzer-5239786212818944.fuzz Fixes: 45510/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DFPWM_fuzzer-4947856883056640 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Paul B Mahol <one...@gmail.com> Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b59ea948cdcb8422964595c32076312756550f17 --- libavcodec/dfpwmdec.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/libavcodec/dfpwmdec.c b/libavcodec/dfpwmdec.c index 27b60a4ea4..e11f393ee4 100644 --- a/libavcodec/dfpwmdec.c +++ b/libavcodec/dfpwmdec.c @@ -106,7 +106,10 @@ static int dfpwm_dec_frame(struct AVCodecContext *ctx, void *data, AVFrame *frame = data; int ret; - frame->nb_samples = packet->size * 8 / ctx->ch_layout.nb_channels; + if (packet->size * 8LL % ctx->ch_layout.nb_channels) + return AVERROR_PATCHWELCOME; + + frame->nb_samples = packet->size * 8LL / ctx->ch_layout.nb_channels; if (frame->nb_samples <= 0) { av_log(ctx, AV_LOG_ERROR, "invalid number of samples in packet\n"); return AVERROR_INVALIDDATA; _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
