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drm/radeon: check buffer relocation offset
author
Leo Liu
<leo.liu@amd.com>
Mon, 28 Apr 2014 13:40:22 +0000
(09:40 -0400)
committer
Christian König
<christian.koenig@amd.com>
Thu, 1 May 2014 10:28:06 +0000
(12:28 +0200)
Signed-off-by: Leo Liu <leo.liu@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Cc: stable@vger.kernel.org
drivers/gpu/drm/radeon/radeon_uvd.c
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diff --git
a/drivers/gpu/drm/radeon/radeon_uvd.c
b/drivers/gpu/drm/radeon/radeon_uvd.c
index
5748bda
..
0f96c47
100644
(file)
--- a/
drivers/gpu/drm/radeon/radeon_uvd.c
+++ b/
drivers/gpu/drm/radeon/radeon_uvd.c
@@
-465,6
+465,10
@@
static int radeon_uvd_cs_reloc(struct radeon_cs_parser *p,
cmd = radeon_get_ib_value(p, p->idx) >> 1;
if (cmd < 0x4) {
+ if (end <= start) {
+ DRM_ERROR("invalid reloc offset %X!\n", offset);
+ return -EINVAL;
+ }
if ((end - start) < buf_sizes[cmd]) {
DRM_ERROR("buffer (%d) to small (%d / %d)!\n", cmd,
(unsigned)(end - start), buf_sizes[cmd]);