linux-kernel - [PATCH] rpmsg: glink: Add check for kstrdup

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Message-Id: <20230619030631.12361-1-jiasheng@iscas.ac.cn>
Date:   Mon, 19 Jun 2023 11:06:31 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     agross@...nel.org, andersson@...nel.org, konrad.dybcio@...aro.org,
        mathieu.poirier@...aro.org
Cc:     linux-arm-msm@...r.kernel.org, linux-remoteproc@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] rpmsg: glink: 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: b4f8e52b89f6 ("rpmsg: Introduce Qualcomm RPM glink driver")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 drivers/rpmsg/qcom_glink_native.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index 1beb40a1d3df..e4015db99899 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -221,6 +221,10 @@ static struct glink_channel *qcom_glink_alloc_channel(struct qcom_glink *glink,
 
 	channel->glink = glink;
 	channel->name = kstrdup(name, GFP_KERNEL);
+	if (!channel->name) {
+		kfree(channel);
+		return ERR_PTR(-ENOMEM);
+	}
 
 	init_completion(&channel->open_req);
 	init_completion(&channel->open_ack);
-- 
2.25.1