avcodec/bmvvideo: Fix runtime error: left shift of 137 by 24 places cannot be represented in type 'int'

Fixes: 1411/clusterfuzz-testcase-minimized-5776085184675840

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

1 files changed, 1 insertions, 1 deletions

diff --git a/libavcodec/bmvvideo.c b/libavcodec/bmvvideo.c
index 78a0945b7a..679b14208a 100644
--- a/libavcodec/bmvvideo.c
+++ b/libavcodec/bmvvideo.c
@@ -107,7 +107,7 @@ static int decode_bmv_frame(const uint8_t *source, int src_len, uint8_t *frame,
                     if (src < source || src >= source_end)
                         return AVERROR_INVALIDDATA;
                     shift += 2;
-                    val |= *src << shift;
+                    val |= (unsigned)*src << shift;
                     if (*src & 0xC)
                         break;
                 }