linux-kernel - [PATCH] HSI: ssi_protocol: fix potential resource leak in ssip_pn

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Message-Id: <20220905074801.46167-1-niejianglei2021@163.com>
Date:   Mon,  5 Sep 2022 15:48:01 +0800
From:   Jianglei Nie <niejianglei2021@....com>
To:     sre@...nel.org, kuba@...nel.org
Cc:     linux-kernel@...r.kernel.org,
        Jianglei Nie <niejianglei2021@....com>
Subject: [PATCH] HSI: ssi_protocol: fix potential resource leak in ssip_pn_open()

ssip_pn_open() claims the HSI client's port with hsi_claim_port(). When
hsi_register_port_event() gets some error and returns a negetive value,
the HSI client's port should be released with hsi_release_port().

Fix it by calling hsi_release_port() when hsi_register_port_event() fails.

Signed-off-by: Jianglei Nie <niejianglei2021@....com>
---
 drivers/hsi/clients/ssi_protocol.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/hsi/clients/ssi_protocol.c b/drivers/hsi/clients/ssi_protocol.c
index 21f11a5b965b..49ffd808d17f 100644
--- a/drivers/hsi/clients/ssi_protocol.c
+++ b/drivers/hsi/clients/ssi_protocol.c
@@ -931,6 +931,7 @@ static int ssip_pn_open(struct net_device *dev)
 	if (err < 0) {
 		dev_err(&cl->device, "Register HSI port event failed (%d)\n",
 			err);
+		hsi_release_port(cl);
 		return err;
 	}
 	dev_dbg(&cl->device, "Configuring SSI port\n");
-- 
2.25.1