[PATCH v3] drm/rocket: Check allocations before use

[Triet Hoang]

Check the result of kvmalloc_array() in rocket_job_push() and
kmalloc_objs() in rocket_job_open() before using
the allocated buffer.

Signed-off-by: Triet Hoang <triet.hoang.dev@xxxxxxxxx>
---
Changes in v2:
- Free scheds when drm_sched_entity_init() fails.
- Initialize ret to 0.

Changes in v3:
- Move patch version descriptions below the '---' marker.

 drivers/accel/rocket/rocket_job.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/accel/rocket/rocket_job.c b/drivers/accel/rocket/rocket_job.c
index ac51bff39833..24e1a61f71e7 100644
--- a/drivers/accel/rocket/rocket_job.c
+++ b/drivers/accel/rocket/rocket_job.c
@@ -192,6 +192,9 @@ static int rocket_job_push(struct rocket_job *job)
 
 	bos = kvmalloc_array(job->in_bo_count + job->out_bo_count, sizeof(void *),
 			     GFP_KERNEL);
+	if (!bos)
+		return -ENOMEM;
+
 	memcpy(bos, job->in_bos, job->in_bo_count * sizeof(void *));
 	memcpy(&bos[job->in_bo_count], job->out_bos, job->out_bo_count * sizeof(void *));
 
@@ -499,7 +502,10 @@ int rocket_job_open(struct rocket_file_priv *rocket_priv)
 	struct drm_gpu_scheduler **scheds = kmalloc_objs(*scheds,
 							 rdev->num_cores);
 	unsigned int core;
-	int ret;
+	int ret = 0;
+
+	if (!scheds)
+		return -ENOMEM;
 
 	for (core = 0; core < rdev->num_cores; core++)
 		scheds[core] = &rdev->cores[core].sched;
@@ -509,9 +515,9 @@ int rocket_job_open(struct rocket_file_priv *rocket_priv)
 				    scheds,
 				    rdev->num_cores, NULL);
 	if (WARN_ON(ret))
-		return ret;
+		kfree(scheds);
 
-	return 0;
+	return ret;
 }
 
 void rocket_job_close(struct rocket_file_priv *rocket_priv)
-- 
2.53.0