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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Qiushi Wu <wu000273@umn.edu>, Ard Biesheuvel <ardb@kernel.org>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.7 109/265] efi/esrt: Fix reference count leak in esre_create_sysfs_entry.
Date:   Mon, 29 Jun 2020 11:15:42 -0400
Message-Id: <20200629151818.2493727-110-sashal@kernel.org>
In-Reply-To: <20200629151818.2493727-1-sashal@kernel.org>
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From: Qiushi Wu <wu000273@umn.edu>

[ Upstream commit 4ddf4739be6e375116c375f0a68bf3893ffcee21 ]

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.

Fixes: 0bb549052d33 ("efi: Add esrt support")
Signed-off-by: Qiushi Wu <wu000273@umn.edu>
Link: https://lore.kernel.org/r/20200528183804.4497-1-wu000273@umn.edu
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/firmware/efi/esrt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/firmware/efi/esrt.c b/drivers/firmware/efi/esrt.c
index e3d6926965834..d5915272141fd 100644
--- a/drivers/firmware/efi/esrt.c
+++ b/drivers/firmware/efi/esrt.c
@@ -181,7 +181,7 @@ static int esre_create_sysfs_entry(void *esre, int entry_num)
 		rc = kobject_init_and_add(&entry->kobj, &esre1_ktype, NULL,
 					  "entry%d", entry_num);
 		if (rc) {
-			kfree(entry);
+			kobject_put(&entry->kobj);
 			return rc;
 		}
 	}
-- 
2.25.1