linux-kernel - [PATCH] NFC: fix possible resource leak

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Date:   Thu, 21 Jan 2021 07:37:45 -0800
From:   Pan Bian <bianpan2016@....com>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Francis Laniel <laniel_francis@...vacyrequired.com>,
        Defang Bo <bodefang@....com>,
        Samuel Ortiz <sameo@...ux.intel.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Pan Bian <bianpan2016@....com>
Subject: [PATCH] NFC: fix possible resource leak

Put the device to avoid resource leak on path that the polling flag is
invalid.

Fixes: a831b9132065 ("NFC: Do not return EBUSY when stopping a poll that's already stopped")
Signed-off-by: Pan Bian <bianpan2016@....com>
---
 net/nfc/netlink.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 573b38ad2f8e..e161ef2d4720 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -852,6 +852,7 @@ static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
 
 	if (!dev->polling) {
 		device_unlock(&dev->dev);
+		nfc_put_device(dev);
 		return -EINVAL;
 	}
 
-- 
2.17.1