diff options
| author | Kasin Li <donglil@codeaurora.org> | 2017-06-19 15:36:53 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-08 10:06:28 +0100 |
| commit | 031b02bc16aeeb34c8038026cbbca1e6430c9d75 (patch) | |
| tree | 9502599d6c42b4f219d79581c4b6cb55b5e56943 | |
| parent | 6e6eba5ba14579f1fede964d189a7153444fb3b6 (diff) | |
drm/msm: Fix potential buffer overflow issue
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@codeaurora.org>
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
Cc: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/msm/msm_gem_submit.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c index fed44d4e5b72..34edb4a4ccd4 100644 --- a/drivers/gpu/drm/msm/msm_gem_submit.c +++ b/drivers/gpu/drm/msm/msm_gem_submit.c @@ -34,10 +34,13 @@ static inline void __user *to_user_ptr(u64 address) } static struct msm_gem_submit *submit_create(struct drm_device *dev, - struct msm_gpu *gpu, int nr) + struct msm_gpu *gpu, uint32_t nr) { struct msm_gem_submit *submit; - int sz = sizeof(*submit) + (nr * sizeof(submit->bos[0])); + uint64_t sz = sizeof(*submit) + (nr * sizeof(submit->bos[0])); + + if (sz > SIZE_MAX) + return NULL; submit = kmalloc(sz, GFP_TEMPORARY | __GFP_NOWARN | __GFP_NORETRY); if (submit) { |