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[125.194.6.184]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-269802df630sm97225825ad.81.2025.09.20.22.31.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 20 Sep 2025 22:31:24 -0700 (PDT) From: Masami Ichikawa To: jikos@kernel.org, bentiss@kernel.org Cc: minbell.kim@samsung.com, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, Masami Ichikawa Subject: [PATCH v2] HID: hid-ntrig: Prevent memory leak in ntrig_report_version() Date: Sun, 21 Sep 2025 14:31:02 +0900 Message-ID: <20250921053102.150182-1-masami256@gmail.com> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Use a scope-based cleanup helper for the buffer allocated with kmalloc() in ntrig_report_version() to simplify the cleanup logic and prevent memory leaks. Fixes: 185c926283da ("HID: hid-ntrig: fix unable to handle page fault in nt= rig_report_version()") Signed-off-by: Masami Ichikawa --- Changes from v1: - Rewrite patch title - Use scope-based cleanup to drop goto-based error path --- drivers/hid/hid-ntrig.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/drivers/hid/hid-ntrig.c b/drivers/hid/hid-ntrig.c index 0f76e241e0af..a7f10c45f62b 100644 --- a/drivers/hid/hid-ntrig.c +++ b/drivers/hid/hid-ntrig.c @@ -142,13 +142,13 @@ static void ntrig_report_version(struct hid_device *h= dev) int ret; char buf[20]; struct usb_device *usb_dev =3D hid_to_usb_dev(hdev); - unsigned char *data =3D kmalloc(8, GFP_KERNEL); + unsigned char *data __free(kfree) =3D kmalloc(8, GFP_KERNEL); =20 if (!hid_is_usb(hdev)) return; =20 if (!data) - goto err_free; + return; =20 ret =3D usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), USB_REQ_CLEAR_FEATURE, @@ -163,9 +163,6 @@ static void ntrig_report_version(struct hid_device *hde= v) hid_info(hdev, "Firmware version: %s (%02x%02x %02x%02x)\n", buf, data[2], data[3], data[4], data[5]); } - -err_free: - kfree(data); } =20 static ssize_t show_phys_width(struct device *dev, --=20 2.51.0