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authorMichael Niedermayer <michael@niedermayer.cc>2021-06-09 21:25:58 +0200
committerMichael Niedermayer <michael@niedermayer.cc>2021-06-12 14:22:42 +0200
commitff56c139e07a4de2803b974b6595f6b71fbf53bd (patch)
tree092204d44beacae2b3131b8d2d07f86d0022659c /libavcodec/faxcompr.c
parent7d8421e3d5bc1300687a65384baccbcb3874b7ac (diff)
downloadffmpeg-ff56c139e07a4de2803b974b6595f6b71fbf53bd.tar.gz
avcodec/faxcompr: Check available bits in decode_uncompressed()
Fixes: Timeout Fixes: 34950/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-5686764151898112 Fixes: 34966/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-4587409334468608 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/faxcompr.c')
-rw-r--r--libavcodec/faxcompr.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/faxcompr.c b/libavcodec/faxcompr.c
index 45e0c482d7..44c1f6f6b9 100644
--- a/libavcodec/faxcompr.c
+++ b/libavcodec/faxcompr.c
@@ -144,6 +144,8 @@ static int decode_uncompressed(AVCodecContext *avctx, GetBitContext *gb,
return AVERROR_INVALIDDATA;
}
cwi = 10 - av_log2(cwi);
+ if (get_bits_left(gb) < cwi + 1)
+ return AVERROR_INVALIDDATA;
skip_bits(gb, cwi + 1);
if (cwi > 5) {
newmode = get_bits1(gb);