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authorMichael Niedermayer <michael@niedermayer.cc>2017-12-15 17:50:12 +0100
committerMichael Niedermayer <michael@niedermayer.cc>2017-12-30 21:11:32 +0100
commitbdba0f6786d57356c2ead515338fb44754aa91c4 (patch)
tree7fb63acc976086b8692c945277368682e889688e
parentbadca11741ea9bd0b4aa1b3af69f38754d4c69e0 (diff)
downloadffmpeg-bdba0f6786d57356c2ead515338fb44754aa91c4.tar.gz
avcodec/hevc_sei: Fix integer overflows in decode_nal_sei_message()
Fixes: signed integer overflow: 2147483520 + 255 cannot be represented in type 'int' Fixes: 4554/clusterfuzz-testcase-minimized-4843714515042304 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> (cherry picked from commit 991ef6e5b9a6a9d95e274ff6bff52db1c82b3808) Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
-rw-r--r--libavcodec/hevc_sei.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/libavcodec/hevc_sei.c b/libavcodec/hevc_sei.c
index d4a82fd456..31813aae2c 100644
--- a/libavcodec/hevc_sei.c
+++ b/libavcodec/hevc_sei.c
@@ -344,11 +344,15 @@ static int decode_nal_sei_message(HEVCContext *s)
av_log(s->avctx, AV_LOG_DEBUG, "Decoding SEI\n");
while (byte == 0xFF) {
+ if (get_bits_left(gb) < 16 || payload_type > INT_MAX - 255)
+ return AVERROR_INVALIDDATA;
byte = get_bits(gb, 8);
payload_type += byte;
}
byte = 0xFF;
while (byte == 0xFF) {
+ if (get_bits_left(gb) < 8 + 8LL*payload_size)
+ return AVERROR_INVALIDDATA;
byte = get_bits(gb, 8);
payload_size += byte;
}