Add the check for the return value of kmalloc in order to avoid NULL pointer dereference in copy_from_user.

Fixes: 20224d715a88 ("drm/msm/submit: Move copy_from_user ahead of locking bos") Signed-off-by: Jiasheng Jiang jiasheng@iscas.ac.cn --- drivers/gpu/drm/msm/msm_gem_submit.c | 4 ++++ 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c index 45a3e5cadc7d..7c2cc1262c05 100644 --- a/drivers/gpu/drm/msm/msm_gem_submit.c +++ b/drivers/gpu/drm/msm/msm_gem_submit.c @@ -209,6 +209,10 @@ static int submit_lookup_cmds(struct msm_gem_submit *submit, goto out; } submit->cmd[i].relocs = kmalloc(sz, GFP_KERNEL); + if (!submit->cmd[i].relocs) { + ret = -ENOMEM; + goto out; + } ret = copy_from_user(submit->cmd[i].relocs, userptr, sz); if (ret) { ret = -EFAULT;