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Subject[PATCH] drm/amdkfd: Fix reference count leaks.
Date
From: Qiushi Wu <wu000273@umn.edu>

kobject_init_and_add() takes reference even when it fails.
If this function returns an error, kobject_put() must be called to
properly clean up the memory associated with the object.

Signed-off-by: Qiushi Wu <wu000273@umn.edu>
---
drivers/gpu/drm/amd/amdkfd/kfd_topology.c | 20 +++++++++++++++-----
1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
index bb77f7af2b6d..dc3c4149f860 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
@@ -632,8 +632,10 @@ static int kfd_build_sysfs_node_entry(struct kfd_topology_device *dev,

ret = kobject_init_and_add(dev->kobj_node, &node_type,
sys_props.kobj_nodes, "%d", id);
- if (ret < 0)
+ if (ret < 0) {
+ kobject_put(dev->kobj_node);
return ret;
+ }

dev->kobj_mem = kobject_create_and_add("mem_banks", dev->kobj_node);
if (!dev->kobj_mem)
@@ -680,8 +682,10 @@ static int kfd_build_sysfs_node_entry(struct kfd_topology_device *dev,
return -ENOMEM;
ret = kobject_init_and_add(mem->kobj, &mem_type,
dev->kobj_mem, "%d", i);
- if (ret < 0)
+ if (ret < 0) {
+ kobject_put(mem->kobj);
return ret;
+ }

mem->attr.name = "properties";
mem->attr.mode = KFD_SYSFS_FILE_MODE;
@@ -699,8 +703,10 @@ static int kfd_build_sysfs_node_entry(struct kfd_topology_device *dev,
return -ENOMEM;
ret = kobject_init_and_add(cache->kobj, &cache_type,
dev->kobj_cache, "%d", i);
- if (ret < 0)
+ if (ret < 0) {
+ kobject_put(cache->kobj);
return ret;
+ }

cache->attr.name = "properties";
cache->attr.mode = KFD_SYSFS_FILE_MODE;
@@ -718,8 +724,10 @@ static int kfd_build_sysfs_node_entry(struct kfd_topology_device *dev,
return -ENOMEM;
ret = kobject_init_and_add(iolink->kobj, &iolink_type,
dev->kobj_iolink, "%d", i);
- if (ret < 0)
+ if (ret < 0) {
+ kobject_put(iolink->kobj);
return ret;
+ }

iolink->attr.name = "properties";
iolink->attr.mode = KFD_SYSFS_FILE_MODE;
@@ -798,8 +806,10 @@ static int kfd_topology_update_sysfs(void)
ret = kobject_init_and_add(sys_props.kobj_topology,
&sysprops_type, &kfd_device->kobj,
"topology");
- if (ret < 0)
+ if (ret < 0) {
+ kobject_put(sys_props.kobj_topology);
return ret;
+ }

sys_props.kobj_nodes = kobject_create_and_add("nodes",
sys_props.kobj_topology);
--
2.17.1
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