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Fix potential pointer arithmetic overflows in rle_unpack() of vmd video decoder. 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 35cb6854bb)
This commit is contained in:
Laurent Aimar 2011-09-25 00:08:51 +02:00 committed by Michael Niedermayer
parent 02bdeff1ef
commit 1b26a734b2
1 changed files with 2 additions and 2 deletions
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4
libavcodec/vmdav.c
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@ -179,13 +179,13 @@ static int rle_unpack(const unsigned char *src, int src_len, int src_count,
l = *ps++;
if (l & 0x80) {
l = (l & 0x7F) * 2;
if (pd + l > dest_end || ps_end - ps < l)
if (dest_end - pd < l || ps_end - ps < l)
return ps - src;
memcpy(pd, ps, l);
ps += l;
pd += l;
} else {
if (pd + i > dest_end || ps_end - ps < 2)
if (dest_end - pd < i || ps_end - ps < 2)
return ps - src;
for (i = 0; i < l; i++) {
*pd++ = ps[0];