avcodec/svq3: fix slice size check

Fixes out of array read Fixes: 09f46aa2175cade93e3e3932646a56a9/asan_heap-oob_4a5385_2995_498f6abfdc0248288cefe5f4b7ad316c.mov Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
8 years ago · 2624695484
parent 8b43ee4054
commit 2624695484
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/svq3.c
+++ b/libavcodec/svq3.c
@ -1040,7 +1040,7 @@ static int svq3_decode_slice_header(AVCodecContext *avctx)
        slice_bits   = slice_length * 8;
        slice_bytes  = slice_length + length - 1;

-        if (slice_bytes > get_bits_left(&s->gb)) {
+        if (8LL*slice_bytes > get_bits_left(&s->gb)) {
            av_log(avctx, AV_LOG_ERROR, "slice after bitstream end\n");
            return -1;
        }