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svq3: use memmove to avoid overlap in memcpy.

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Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 4c8ce750ab)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2013-04-18 17:54:54 +02:00
parent ab38b39059
commit a92b73da99
1 changed files with 2 additions and 2 deletions
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4
libavcodec/svq3.c
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@@ -790,8 +790,8 @@ static int svq3_decode_slice_header(AVCodecContext *avctx)
header ^ s->watermark_key);
}
if (length > 0) {
memcpy((uint8_t *) &h->gb.buffer[get_bits_count(&h->gb) >> 3],
&h->gb.buffer[h->gb.size_in_bits >> 3], length - 1);
memmove((uint8_t *) &h->gb.buffer[get_bits_count(&h->gb) >> 3],
&h->gb.buffer[h->gb.size_in_bits >> 3], length - 1);
}
skip_bits_long(&h->gb, 0);
}