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sanm: add forgotten check for decoded_size in old_codec37()

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Fixes out of array accesses

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 365270aec5)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-02-12 01:09:03 +01:00
parent f5955d9f6f
commit 1ea5bbc594
1 changed files with 5 additions and 0 deletions
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5
libavcodec/sanm.c
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@ -416,6 +416,11 @@ 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))