linux-kernel - [PATCH] ipmi:ssif: Add check for kstrdup

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Message-Id: <20230619092802.35384-1-jiasheng@iscas.ac.cn>
Date:   Mon, 19 Jun 2023 17:28:02 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     minyard@....org, kamlakantp@...vell.com
Cc:     openipmi-developer@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] ipmi:ssif: Add check for kstrdup

Add check for the return value of kstrdup() and return the error
if it fails in order to avoid NULL pointer dereference.

Fixes: c4436c9149c5 ("ipmi_ssif: avoid registering duplicate ssif interface")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 drivers/char/ipmi/ipmi_ssif.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/char/ipmi/ipmi_ssif.c b/drivers/char/ipmi/ipmi_ssif.c
index 3b921c78ba08..3b87a2726e99 100644
--- a/drivers/char/ipmi/ipmi_ssif.c
+++ b/drivers/char/ipmi/ipmi_ssif.c
@@ -1600,6 +1600,11 @@ static int ssif_add_infos(struct i2c_client *client)
 	info->addr_src = SI_ACPI;
 	info->client = client;
 	info->adapter_name = kstrdup(client->adapter->name, GFP_KERNEL);
+	if (!info->adapter_name) {
+		kfree(info);
+		return -ENOMEM;
+	}
+
 	info->binfo.addr = client->addr;
 	list_add_tail(&info->link, &ssif_infos);
 	return 0;
-- 
2.25.1