[PATCH AUTOSEL 5.1 019/141] drm/amdkfd: Fix a potential memory leak

Sasha Levin
2019-07-19T04:03:38Z

From: Oak Zeng <ozeng@amd.com>

[ Upstream commit e73390d181103a19e1111ec2f25559a0570e9fe0 ]

Free mqd_mem_obj it GTT buffer allocation for MQD+control stack fails.

Signed-off-by: Oak Zeng <ozeng@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c
index 9dbba609450e..8fe74b821b32 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c
@@ -76,6 +76,7 @@ static int init_mqd(struct mqd_manager *mm, void **mqd,
struct v9_mqd *m;
struct kfd_dev *kfd = mm->dev;

+ *mqd_mem_obj = NULL;
/* From V9, for CWSR, the control stack is located on the next page
* boundary after the mqd, we will use the gtt allocation function
* instead of sub-allocation function.
@@ -93,8 +94,10 @@ static int init_mqd(struct mqd_manager *mm, void **mqd,
} else
retval = kfd_gtt_sa_allocate(mm->dev, sizeof(struct v9_mqd),
mqd_mem_obj);
- if (retval != 0)
+ if (retval) {
+ kfree(*mqd_mem_obj);
return -ENOMEM;
+ }

m = (struct v9_mqd *) (*mqd_mem_obj)->cpu_ptr;
addr = (*mqd_mem_obj)->gpu_addr;
--
2.20.1