avcodec/wavpacl: Fix runtime error: left shift of negative value -1

Fixes: 607/clusterfuzz-testcase-5108792465293312 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
8 years ago · 12eebb845a
parent 3e1028c625
commit 12eebb845a
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/wavpack.c
+++ b/libavcodec/wavpack.c
@ -682,7 +682,7 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
    s->hybrid_bitrate =   s->frame_flags & WV_HYBRID_BITRATE;
    s->post_shift     = bpp * 8 - orig_bpp + ((s->frame_flags >> 13) & 0x1f);
    s->hybrid_maxclip =  ((1LL << (orig_bpp - 1)) - 1);
-    s->hybrid_minclip = ((-1LL << (orig_bpp - 1)));
+    s->hybrid_minclip = ((-1UL << (orig_bpp - 1)));
    s->CRC            = bytestream2_get_le32(&gb);

    // parse metadata blocks