avcodec/mpc8: Fix 32bit mask/enum
authorMichael Niedermayer <michael@niedermayer.cc>
Sat, 10 Aug 2019 21:09:42 +0000 (23:09 +0200)
committerMichael Niedermayer <michael@niedermayer.cc>
Sun, 11 Aug 2019 17:13:21 +0000 (19:13 +0200)
Fixes: left shift of 1 by 31 places cannot be represented in type 'int'
Fixes: 15817/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPC8_fuzzer-5636626409062400

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
libavcodec/mpc8.c

index d7baac2..03838a9 100644 (file)
@@ -62,7 +62,7 @@ static inline int mpc8_dec_enum(GetBitContext *gb, int k, int n)
     do {
         n--;
         if (code >= C[n]) {
-            bits |= 1 << n;
+            bits |= 1U << n;
             code -= C[n];
             C -= 32;
             k--;