5.15-stable review patch. If anyone has any objections, please let me know.

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From: Masami Ichikawa masami256@gmail.com

[ Upstream commit 53f731f5bba0cf03b751ccceb98b82fadc9ccd1e ]

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 (specifically the !hid_is_usb()-case one).

[jkosina@suse.com: elaborate on the actual existing leak] Fixes: 185c926283da ("HID: hid-ntrig: fix unable to handle page fault in ntrig_report_version()") Signed-off-by: Masami Ichikawa masami256@gmail.com Signed-off-by: Jiri Kosina jkosina@suse.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 a1128c5315fff..3c41f6841f775 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 *hdev) int ret; char buf[20]; struct usb_device *usb_dev = hid_to_usb_dev(hdev); - unsigned char *data = kmalloc(8, GFP_KERNEL); + unsigned char *data __free(kfree) = kmalloc(8, GFP_KERNEL);

if (!hid_is_usb(hdev)) return;

if (!data) - goto err_free; + return;

ret = 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 *hdev) hid_info(hdev, "Firmware version: %s (%02x%02x %02x%02x)\n", buf, data[2], data[3], data[4], data[5]); } - -err_free: - kfree(data); }

static ssize_t show_phys_width(struct device *dev,