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Merge commit 'f935aca44c674d30e3ed940ef73bbad1228a5855'

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* commit 'f935aca44c674d30e3ed940ef73bbad1228a5855':
  av_memcpy_backptr: avoid an infinite loop for back = 0
  4xm: check the return value of read_huffman_tables().

Conflicts:
	libavcodec/4xm.c
	libavutil/mem.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-02-24 12:22:51 +01:00
commit 4ba35194a9
2 changed files with 8 additions and 3 deletions
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6
libavcodec/4xm.c
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@ -757,8 +757,10 @@ static int decode_i_frame(FourXContext *f, const uint8_t *buf, int length)
}
prestream = read_huffman_tables(f, prestream, buf + length - prestream);
if (!prestream)
return -1;
if (!prestream) {
av_log(f->avctx, AV_LOG_ERROR, "Error reading Huffman tables.\n");
return AVERROR_INVALIDDATA;
}
av_assert0(prestream <= buf + length);

5
libavutil/mem.c
View File

@ -323,7 +323,10 @@ static void fill32(uint8_t *dst, int len)
void av_memcpy_backptr(uint8_t *dst, int back, int cnt)
{
const uint8_t *src = &dst[-back];
if (back <= 1) {
if (!back)
return;
if (back == 1) {
memset(dst, *src, cnt);
} else if (back == 2) {
fill16(dst, cnt);