ffmpeg | branch: release/2.8 | Michael Niedermayer <mich...@niedermayer.cc> | Sun Jan 19 21:51:11 2020 +0100| [0a8e5bab374441ac61376c532fa667f09bf88992] | committer: Michael Niedermayer
avcodec/snappy: Sanity check bytestream2_get_levarint() Fixes: left shift of 79 by 28 places cannot be represented in type 'int' Fixes: 20202/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HAP_fuzzer-5719004081815552 Fixes: 20219/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HAP_fuzzer-5641738677125120 Fixes: 20389/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HAP_fuzzer-5680721517871104 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> (cherry picked from commit be54da2117a6f58c14283f2511e71fda8d3bfe9d) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=0a8e5bab374441ac61376c532fa667f09bf88992 --- libavcodec/snappy.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/snappy.c b/libavcodec/snappy.c index 7900b0f978..f5c4c6578b 100644 --- a/libavcodec/snappy.c +++ b/libavcodec/snappy.c @@ -39,6 +39,8 @@ static int64_t bytestream2_get_levarint(GetByteContext *gb) do { tmp = bytestream2_get_byte(gb); + if (shift > 31 || ((tmp & 127LL) << shift) > INT_MAX) + return AVERROR_INVALIDDATA; val |= (tmp & 127) << shift; shift += 7; } while (tmp & 128); _______________________________________________ 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".
