ffmpeg | branch: master | Michael Niedermayer <mich...@niedermayer.cc> | Tue Jan 28 20:12:25 2020 +0100| [fb3855342b9e4c577c63b38a7a5a574830a21934] | committer: Michael Niedermayer
avcodec/lagarith: Sanity check scale A value of 24 and above can collaps the range to 0 which would not work. Fixes: Timeout (75sec -> 21sec) Fixes: 18707/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_LAGARITH_fuzzer-5708950892969984 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fb3855342b9e4c577c63b38a7a5a574830a21934 --- libavcodec/lagarith.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/lagarith.c b/libavcodec/lagarith.c index 59169be5de..0a45812bc1 100644 --- a/libavcodec/lagarith.c +++ b/libavcodec/lagarith.c @@ -226,6 +226,9 @@ static int lag_read_prob_header(lag_rac *rac, GetBitContext *gb) } } + if (scale_factor > 23) + return AVERROR_INVALIDDATA; + rac->scale = scale_factor; /* Fill probability array with cumulative probability for each symbol. */ _______________________________________________ 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".
