ffmpeg | branch: master | Michael Niedermayer <mich...@niedermayer.cc> | Wed May 10 00:56:45 2017 +0200| [ed3c9b5b0dd5abb545c48e930e1c32c187b0776a] | committer: Michael Niedermayer
avcodec/lagarith: Check scale_factor Fixes: 1425/clusterfuzz-testcase-minimized-6295712339853312 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ed3c9b5b0dd5abb545c48e930e1c32c187b0776a --- libavcodec/lagarith.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/libavcodec/lagarith.c b/libavcodec/lagarith.c index 044497720f..1f4afc5312 100644 --- a/libavcodec/lagarith.c +++ b/libavcodec/lagarith.c @@ -191,7 +191,9 @@ static int lag_read_prob_header(lag_rac *rac, GetBitContext *gb) } scale_factor++; - cumulative_target = 1 << scale_factor; + if (scale_factor >= 32U) + return AVERROR_INVALIDDATA; + cumulative_target = 1U << scale_factor; if (scaled_cumul_prob > cumulative_target) { av_log(rac->avctx, AV_LOG_ERROR, _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
