linux-kernel - [PATCH AUTOSEL 6.4 5/7] NTB: EPF: fix possible memory leak in pci_vntb

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Message-Id: <20230803130321.641516-5-sashal@kernel.org>
Date:   Thu,  3 Aug 2023 09:03:18 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     ruanjinjie <ruanjinjie@...wei.com>, Jon Mason <jdmason@...zu.us>,
        Sasha Levin <sashal@...nel.org>, dave.jiang@...el.com,
        allenbh@...il.com, lpieralisi@...nel.org, kw@...ux.com,
        bhelgaas@...gle.com, ntb@...ts.linux.dev, linux-pci@...r.kernel.org
Subject: [PATCH AUTOSEL 6.4 5/7] NTB: EPF: fix possible memory leak in pci_vntb_probe()

From: ruanjinjie <ruanjinjie@...wei.com>

[ Upstream commit 956578e3d397e00d6254dc7b5194d28587f98518 ]

As ntb_register_device() don't handle error of device_register(),
if ntb_register_device() returns error in pci_vntb_probe(), name of kobject
which is allocated in dev_set_name() called in device_add() is leaked.

As comment of device_add() says, it should call put_device() to drop the
reference count that was set in device_initialize()
when it fails, so the name can be freed in kobject_cleanup().

Signed-off-by: ruanjinjie <ruanjinjie@...wei.com>
Signed-off-by: Jon Mason <jdmason@...zu.us>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/pci/endpoint/functions/pci-epf-vntb.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pci/endpoint/functions/pci-epf-vntb.c b/drivers/pci/endpoint/functions/pci-epf-vntb.c
index b7c7a8af99f4f..77306983ac456 100644
--- a/drivers/pci/endpoint/functions/pci-epf-vntb.c
+++ b/drivers/pci/endpoint/functions/pci-epf-vntb.c
@@ -1285,6 +1285,7 @@ static int pci_vntb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	return 0;
 
 err_register_dev:
+	put_device(&ndev->ntb.dev);
 	return -EINVAL;
 }
 
-- 
2.40.1