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avcodec/golomb: Assert that k is in the supported range for get_ur/sr_golomb() 

Found by code review related to CID1604563 Overflowed return value

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-07-05 02:21:46 +02:00
parent 7cf5b83f6f
commit b2aaeb81f6
1 changed files with 1 additions and 0 deletions
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libavcodec/golomb.h
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@ -402,6 +402,7 @@ static inline int get_ur_golomb(GetBitContext *gb, int k, int limit,
log = av_log2(buf); log = av_log2(buf);
if (log > 31 - limit) { if (log > 31 - limit) {
av_assert2(log >= k);
buf >>= log - k; buf >>= log - k;
buf += (30U - log) << k; buf += (30U - log) << k;
LAST_SKIP_BITS(re, gb, 32 + k - log); LAST_SKIP_BITS(re, gb, 32 + k - log);