avcodec/wavpack: Fix runtime error: shift exponent 32 is too large for 32-bit type...
authorMichael Niedermayer <michael@niedermayer.cc>
Thu, 1 Jun 2017 16:48:37 +0000 (18:48 +0200)
committerMichael Niedermayer <michael@niedermayer.cc>
Mon, 5 Jun 2017 21:16:54 +0000 (23:16 +0200)
Fixes: 1967/clusterfuzz-testcase-minimized-5757031199801344

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 8b3e580b7f436206e84dac89415e057fa9abdab8)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
libavcodec/wavpack.c

index 25dc4cd..ec8a9d9 100644 (file)
@@ -184,7 +184,7 @@ static int wv_get_value(WavpackFrameContext *ctx, GetBitContext *gb,
                     goto error;
                 t += t2;
             } else {
-                if (get_bits_left(gb) < t2 - 1)
+                if (t2 >= 32 || get_bits_left(gb) < t2 - 1)
                     goto error;
                 t += get_bits_long(gb, t2 - 1) | (1 << (t2 - 1));
             }