ffmpeg | branch: master | Michael Niedermayer <mich...@niedermayer.cc> | Sat Sep 26 21:58:37 2020 +0200| [7265b7d904f86ec1c681222310c739f92ba55e5e] | committer: Michael Niedermayer
avcodec/exr: Fix overflow with many blocks Fixes: signed integer overflow: 1073741827 * 8 cannot be represented in type 'int' Fixes: 25621/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EXR_fuzzer-6304841641754624 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=7265b7d904f86ec1c681222310c739f92ba55e5e --- libavcodec/exr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/exr.c b/libavcodec/exr.c index 162b3bb252..80117deb8a 100644 --- a/libavcodec/exr.c +++ b/libavcodec/exr.c @@ -1789,7 +1789,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) return ret; - if (bytestream2_get_bytes_left(&s->gb) < nb_blocks * 8) + if (bytestream2_get_bytes_left(&s->gb)/8 < nb_blocks) return AVERROR_INVALIDDATA; // check offset table and recreate it if need _______________________________________________ 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".
