Commit 17ed808a authored by Qiushi Wu's avatar Qiushi Wu Committed by Borislav Petkov

EDAC: Fix reference count leaks

When kobject_init_and_add() returns an error, it should be handled
because kobject_init_and_add() takes a 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.

Therefore, replace calling kfree() and call kobject_put() and add a
missing kobject_put() in the edac_device_register_sysfs_main_kobj()
error path.

 [ bp: Massage and merge into a single patch. ]

Fixes: b2ed215a ("Kobject: change drivers/edac to use kobject_init_and_add")
Signed-off-by: default avatarQiushi Wu <wu000273@umn.edu>
Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200528202238.18078-1-wu000273@umn.edu
Link: https://lkml.kernel.org/r/20200528203526.20908-1-wu000273@umn.edu
parent 8807e155
...@@ -275,6 +275,7 @@ int edac_device_register_sysfs_main_kobj(struct edac_device_ctl_info *edac_dev) ...@@ -275,6 +275,7 @@ int edac_device_register_sysfs_main_kobj(struct edac_device_ctl_info *edac_dev)
/* Error exit stack */ /* Error exit stack */
err_kobj_reg: err_kobj_reg:
kobject_put(&edac_dev->kobj);
module_put(edac_dev->owner); module_put(edac_dev->owner);
err_out: err_out:
......
...@@ -386,7 +386,7 @@ static int edac_pci_main_kobj_setup(void) ...@@ -386,7 +386,7 @@ static int edac_pci_main_kobj_setup(void)
/* Error unwind statck */ /* Error unwind statck */
kobject_init_and_add_fail: kobject_init_and_add_fail:
kfree(edac_pci_top_main_kobj); kobject_put(edac_pci_top_main_kobj);
kzalloc_fail: kzalloc_fail:
module_put(THIS_MODULE); module_put(THIS_MODULE);
......
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