From 23aae62c2cb4504a09ceb8cd0cabc1c8b260f521 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 7 Apr 2012 17:25:47 +0200 Subject: alsdec: Check k used for rice decoder. Values that fail this check will cause failure of decode_rice() Signed-off-by: Michael Niedermayer Signed-off-by: Justin Ruggles --- libavcodec/alsdec.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'libavcodec/alsdec.c') diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c index 56d7f2faca..ef12253271 100644 --- a/libavcodec/alsdec.c +++ b/libavcodec/alsdec.c @@ -651,6 +651,11 @@ static int read_var_block_data(ALSDecContext *ctx, ALSBlockData *bd) for (k = 1; k < sub_blocks; k++) s[k] = s[k - 1] + decode_rice(gb, 0); } + for (k = 1; k < sub_blocks; k++) + if (s[k] > 32) { + av_log(avctx, AV_LOG_ERROR, "k invalid for rice code.\n"); + return AVERROR_INVALIDDATA; + } if (get_bits1(gb)) *bd->shift_lsbs = get_bits(gb, 4) + 1; -- cgit v1.2.3