From aa79f996eb41e95aed85a1bd7f56bcd6a3842008 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Mon, 9 Mar 2026 08:50:16 +0100 Subject: i2c: cp2615: fix serial string NULL-deref at probe MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The cp2615 driver uses the USB device serial string as the i2c adapter name but does not make sure that the string exists. Verify that the device has a serial number before accessing it to avoid triggering a NULL-pointer dereference (e.g. with malicious devices). Fixes: 4a7695429ead ("i2c: cp2615: add i2c driver for Silicon Labs' CP2615 Digital Audio Bridge") Cc: stable@vger.kernel.org # 5.13 Cc: Bence Csókás Signed-off-by: Johan Hovold Reviewed-by: Bence Csókás Signed-off-by: Andi Shyti Link: https://lore.kernel.org/r/20260309075016.25612-1-johan@kernel.org --- drivers/i2c/busses/i2c-cp2615.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers') diff --git a/drivers/i2c/busses/i2c-cp2615.c b/drivers/i2c/busses/i2c-cp2615.c index e2d7cd2390fc..8212875700e1 100644 --- a/drivers/i2c/busses/i2c-cp2615.c +++ b/drivers/i2c/busses/i2c-cp2615.c @@ -298,6 +298,9 @@ cp2615_i2c_probe(struct usb_interface *usbif, const struct usb_device_id *id) if (!adap) return -ENOMEM; + if (!usbdev->serial) + return -EINVAL; + strscpy(adap->name, usbdev->serial, sizeof(adap->name)); adap->owner = THIS_MODULE; adap->dev.parent = &usbif->dev; -- cgit v1.2.3