avcodec/get_bits: add assertion to limit ouptut value of get_bits

Should fix the following Coverity false positives:

Coverity CID #1415651.
Coverity CID #1420392.
Coverity CID #1420473.
Coverity CID #1433770.
Coverity CID #1435320.
Coverity CID #1439573.
Coverity CID #1439580.
Coverity CID #1439588.

Signed-off-by: Marton Balint <cus@passwd.hu>

diff --git a/libavcodec/get_bits.h b/libavcodec/get_bits.h
index 2e2adc29c26dc077c269a17485f5ec275e1c9a2b..c2f267186e3e8641388706d86b9b8c1369c608a2 100644 (file)
--- a/libavcodec/get_bits.h
+++ b/libavcodec/get_bits.h
@@ -403,6 +403,7 @@ static inline unsigned int get_bits(GetBitContext *s, int n)
     LAST_SKIP_BITS(re, s, n);
     CLOSE_READER(re, s);
 #endif
+    av_assert2(tmp < UINT64_C(1) << n);
     return tmp;
 }