4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Kasin Li <donglil@xxxxxxxxxxxxxx>
commit 4a630fadbb29d9efaedb525f1a8f7449ad107641 upstream.
In function submit_create, if nr_cmds or nr_bos is assigned with
negative value, the allocated buffer may be small than intended.
Using this buffer will lead to buffer overflow issue.
Signed-off-by: Kasin Li <donglil@xxxxxxxxxxxxxx>
Signed-off-by: Jordan Crouse <jcrouse@xxxxxxxxxxxxxx>
Signed-off-by: Rob Clark <robdclark@xxxxxxxxx>
Cc: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/msm/msm_gem_submit.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
--- a/drivers/gpu/drm/msm/msm_gem_submit.c
+++ b/drivers/gpu/drm/msm/msm_gem_submit.c
@@ -31,11 +31,14 @@
#define BO_PINNED 0x2000
static struct msm_gem_submit *submit_create(struct drm_device *dev,
- struct msm_gpu *gpu, int nr_bos, int nr_cmds)
+ struct msm_gpu *gpu, uint32_t nr_bos, uint32_t nr_cmds)
{
struct msm_gem_submit *submit;
- int sz = sizeof(*submit) + (nr_bos * sizeof(submit->bos[0])) +
- (nr_cmds * sizeof(*submit->cmd));
+ uint64_t sz = sizeof(*submit) + (nr_bos * sizeof(submit->bos[0])) +
+ (nr_cmds * sizeof(submit->cmd[0]));
+
+ if (sz > SIZE_MAX)
+ return NULL;
submit = kmalloc(sz, GFP_TEMPORARY | __GFP_NOWARN | __GFP_NORETRY);
if (!submit)