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EDAC: Fix reference count leaks

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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: b2ed215a33 ("Kobject: change drivers/edac to use kobject_init_and_add")
Signed-off-by: Qiushi Wu <wu000273@umn.edu>
Signed-off-by: Borislav 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
This commit is contained in:
Qiushi Wu 2020-05-28 15:22:37 -05:00 committed by Borislav Petkov
parent 8807e15597
commit 17ed808ad2
2 changed files with 2 additions and 1 deletions
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1
drivers/edac/edac_device_sysfs.c
View File

@ -275,6 +275,7 @@ int edac_device_register_sysfs_main_kobj(struct edac_device_ctl_info *edac_dev)
/* Error exit stack */
err_kobj_reg:
kobject_put(&edac_dev->kobj);
module_put(edac_dev->owner);
err_out:

2
drivers/edac/edac_pci_sysfs.c
View File

@ -386,7 +386,7 @@ static int edac_pci_main_kobj_setup(void)
/* Error unwind statck */
kobject_init_and_add_fail:
kfree(edac_pci_top_main_kobj);
kobject_put(edac_pci_top_main_kobj);
kzalloc_fail:
module_put(THIS_MODULE);