linux-kernel - [PATCH 4.4 084/149] cxl: Fix kobject memleak

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Date:   Thu, 20 Aug 2020 11:22:41 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hulk Robot <hulkci@...wei.com>,
        Wang Hai <wanghai38@...wei.com>,
        Andrew Donnellan <ajd@...ux.ibm.com>,
        Frederic Barrat <fbarrat@...ux.ibm.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.4 084/149] cxl: Fix kobject memleak

From: Wang Hai <wanghai38@...wei.com>

[ Upstream commit 85c5cbeba8f4fb28e6b9bfb3e467718385f78f76 ]

Currently the error return path from kobject_init_and_add() is not
followed by a call to kobject_put() - which means we are leaking
the kobject.

Fix it by adding a call to kobject_put() in the error path of
kobject_init_and_add().

Fixes: b087e6190ddc ("cxl: Export optional AFU configuration record in sysfs")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Wang Hai <wanghai38@...wei.com>
Acked-by: Andrew Donnellan <ajd@...ux.ibm.com>
Acked-by: Frederic Barrat <fbarrat@...ux.ibm.com>
Link: https://lore.kernel.org/r/20200602120733.5943-1-wanghai38@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/misc/cxl/sysfs.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

--- a/drivers/misc/cxl/sysfs.c
+++ b/drivers/misc/cxl/sysfs.c
@@ -539,7 +539,7 @@ static struct afu_config_record *cxl_sys
 	rc = kobject_init_and_add(&cr->kobj, &afu_config_record_type,
 				  &afu->dev.kobj, "cr%i", cr->cr);
 	if (rc)
-		goto err;
+		goto err1;
 
 	rc = sysfs_create_bin_file(&cr->kobj, &cr->config_attr);
 	if (rc)
@@ -555,9 +555,6 @@ err2:
 err1:
 	kobject_put(&cr->kobj);
 	return ERR_PTR(rc);
-err:
-	kfree(cr);
-	return ERR_PTR(rc);
 }
 
 void cxl_sysfs_afu_remove(struct cxl_afu *afu)