From 365270aec5c2b9284230abc702b11168818f14cf Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Tue, 12 Feb 2013 01:09:03 +0100 Subject: [PATCH] sanm: add forgotten check for decoded_size in old_codec37() Fixes out of array accesses Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer --- libavcodec/sanm.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/libavcodec/sanm.c b/libavcodec/sanm.c index 101a843939..ec013511c8 100644 --- a/libavcodec/sanm.c +++ b/libavcodec/sanm.c @@ -417,6 +417,11 @@ static int old_codec37(SANMVideoContext *ctx, int top, flags = bytestream2_get_byte(&ctx->gb); bytestream2_skip(&ctx->gb, 3); + if (decoded_size > height * stride - left - top * stride) { + decoded_size = height * stride - left - top * stride; + av_log(ctx->avctx, AV_LOG_WARNING, "decoded size is too large\n"); + } + ctx->rotate_code = 0; if (((seq & 1) || !(flags & 1)) && (compr && compr != 2))