mss2: do not try to read too many palette entries

Reported by Michael Niedermayer <michaelni@gmx.at> Signed-off-by: Kostya Shishkov <kostya.shishkov@gmail.com>
12 years ago · 6ceef07b21
parent 59383d5740
commit 6ceef07b21
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/mss2.c
+++ b/libavcodec/mss2.c
@ -161,7 +161,7 @@ static int decode_pal_v2(MSS12Context *ctx, const uint8_t *buf, int buf_size)
        return 0;

    ncol = *buf++;
-    if (buf_size < 2 + ncol * 3)
+    if (ncol > ctx->free_colours || buf_size < 2 + ncol * 3)
        return -1;
    for (i = 0; i < ncol; i++)
        *pal++ = AV_RB24(buf + 3 * i);