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* [PATCH] edac: Fix reference count leak in edac_pci_main_kobj_setup.
@ 2020-05-28 20:22 wu000273
  2020-06-17 13:56 ` Borislav Petkov
  0 siblings, 1 reply; 2+ messages in thread
From: wu000273 @ 2020-05-28 20:22 UTC (permalink / raw)
  To: kjlu
  Cc: wu000273, Borislav Petkov, Mauro Carvalho Chehab, Tony Luck,
	James Morse, Robert Richter, Greg Kroah-Hartman, Doug Thompson,
	linux-edac, linux-kernel

From: Qiushi Wu <wu000273@umn.edu>

kobject_init_and_add() should be handled when it return an error,
because 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. Previous
commit "b8eb718348b8" fixed a similar problem. Thus replace calling
kfree() by calling kobject_put().

Fixes: b2ed215a3338 ("Kobject: change drivers/edac to use kobject_init_and_add")
Signed-off-by: Qiushi Wu <wu000273@umn.edu>
---
 drivers/edac/edac_pci_sysfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/edac/edac_pci_sysfs.c b/drivers/edac/edac_pci_sysfs.c
index 72c9eb9fdffb..53042af7262e 100644
--- a/drivers/edac/edac_pci_sysfs.c
+++ b/drivers/edac/edac_pci_sysfs.c
@@ -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);
-- 
2.17.1


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2020-05-28 20:22 [PATCH] edac: Fix reference count leak in edac_pci_main_kobj_setup wu000273
2020-06-17 13:56 ` Borislav Petkov

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