From 7b6a51f59c467ab9f4b73122dc269206fb517425 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 6 May 2017 18:28:09 +0200 Subject: [PATCH] avcodec/shorten: Check k in get_uint() Fixes: undefined shift Fixes: 1371/clusterfuzz-testcase-minimized-5770822591447040 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/shorten.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/libavcodec/shorten.c b/libavcodec/shorten.c index 90569bdb1f..2d3540a229 100644 --- a/libavcodec/shorten.c +++ b/libavcodec/shorten.c @@ -160,8 +160,11 @@ static int allocate_buffers(ShortenContext *s) static inline unsigned int get_uint(ShortenContext *s, int k) { - if (s->version != 0) + if (s->version != 0) { k = get_ur_golomb_shorten(&s->gb, ULONGSIZE); + if (k > 31U) + return AVERROR_INVALIDDATA; + } return get_ur_golomb_shorten(&s->gb, k); }