From: Leo Liu <leo.liu@xxxxxxx>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
commit 695daf1a8e731a4b5b89de89a61f32a4d7ad7094 upstream.
Signed-off-by: Leo Liu <leo.liu@xxxxxxx>
Signed-off-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/gpu/drm/radeon/radeon_uvd.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/radeon/radeon_uvd.c b/drivers/gpu/drm/radeon/radeon_uvd.c
index 83936473f8e4..a656b1a7e10a 100644
--- a/drivers/gpu/drm/radeon/radeon_uvd.c
+++ b/drivers/gpu/drm/radeon/radeon_uvd.c
@@ -464,6 +464,10 @@ 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]);
--
1.9.3
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