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Code Issues Releases Activity

avcodec/g2meet: Fix framebuf size

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Currently the code can in some cases draw tiles that hang outside the
allocated buffer. This patch increases the buffer size to avoid out
of array accesses. An alternative would be to fail if such tiles are
encountered.
I do not know if any valid files use such hanging tiles.

Fixes Ticket2971
Found-by: ami_stuff
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-09-21 23:34:11 +02:00
parent 5dca837ac3
commit e07ac727c1
1 changed files with 2 additions and 2 deletions
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4
libavcodec/g2meet.c
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@ -443,8 +443,8 @@ static int g2m_init_buffers(G2MContext *c)
int aligned_height;
if (!c->framebuf || c->old_width < c->width || c->old_height < c->height) {
c->framebuf_stride = FFALIGN(c->width * 3, 16);
aligned_height = FFALIGN(c->height, 16);
c->framebuf_stride = FFALIGN(c->width + 15, 16) * 3;
aligned_height = c->height + 15;
av_free(c->framebuf);
c->framebuf = av_mallocz(c->framebuf_stride * aligned_height);
if (!c->framebuf)