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Check for invalid VLC value in smacker decoder.

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Signed-off-by: Martin Storsjö <martin@martin.st>
(cherry picked from commit 6489455495fc5bfbebcfe3f57e5d4fdd6a781091)

Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Laurent Aimar 2011-09-12 23:49:36 +02:00 committed by Reinhard Tartler
parent 5b1f79b092
commit 0d93b03e68
1 changed files with 2 additions and 0 deletions
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2
libavcodec/smacker.c
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@ -139,6 +139,8 @@ static int smacker_decode_bigtree(GetBitContext *gb, HuffContext *hc, DBCtx *ctx
b2 = get_bits_count(gb);
i2 = ctx->v2->table ? get_vlc2(gb, ctx->v2->table, SMKTREE_BITS, 3) : 0;
b2 = get_bits_count(gb) - b2;
if (i1 < 0 || i2 < 0)
return -1;
val = ctx->recode1[i1] | (ctx->recode2[i2] << 8);
if(val == ctx->escapes[0]) {
ctx->last[0] = hc->current;