[PATCH AUTOSEL for 4.9 180/281] drm/amdkfd: NULL dereference involving create_process()

[Sasha Levin]

From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

[ Upstream commit b312b2b25b6ac9e2eb03f4ca651b33108752de3a ]

We accidentally return ERR_PTR(0) which is NULL.  The caller is not
expecting that and it leads to an Oops.

Fixes: dd59239a9862 ("amdkfd: init aperture once per process")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Reviewed-by: Felix Kuehling <felix.kuehling@xxxxxxx>
Signed-off-by: Oded Gabbay <oded.gabbay@xxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
---
 drivers/gpu/drm/amd/amdkfd/kfd_process.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index ef7c8de7060e..171480bb95d0 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -317,7 +317,8 @@ static struct kfd_process *create_process(const struct task_struct *thread)
 
 	/* init process apertures*/
 	process->is_32bit_user_mode = in_compat_syscall();
-	if (kfd_init_apertures(process) != 0)
+	err = kfd_init_apertures(process);
+	if (err != 0)
 		goto err_init_apretures;
 
 	return process;
-- 
2.14.1