avcodec/flacdec: Fix signed integer overflow in decode_subframe_fixed()

Fixes undefined behavior Fixes: 640912-media Found-by: Matt Wolenetz <wolenetz@google.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
8 years ago · 83a75bf6c3
parent acc163c6ab
commit 83a75bf6c3
1 changed files with 2 additions and 1 deletions
--- a/libavcodec/flacdec.c
+++ b/libavcodec/flacdec.c
@ -268,7 +268,8 @@ static int decode_subframe_fixed(FLACContext *s, int32_t *decoded,
                                 int pred_order, int bps)
 {
    const int blocksize = s->blocksize;
-    int av_uninit(a), av_uninit(b), av_uninit(c), av_uninit(d), i;
+    unsigned av_uninit(a), av_uninit(b), av_uninit(c), av_uninit(d);
+    int i;
    int ret;

    /* warm up samples */