USB completion handlers are called in atomic context and must specifically not allocate memory using GFP_KERNEL.

Fixes: 9f2d3eae88d2 ("can: ucan: add driver for Theobroma Systems UCAN devices") Cc: stable stable@vger.kernel.org # 4.19 Cc: Jakob Unterwurzacher jakob.unterwurzacher@theobroma-systems.com Cc: Martin Elshuber martin.elshuber@theobroma-systems.com Cc: Philipp Tomsich philipp.tomsich@theobroma-systems.com Signed-off-by: Johan Hovold johan@kernel.org --- drivers/net/can/usb/ucan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/can/usb/ucan.c b/drivers/net/can/usb/ucan.c index 04aac3bb54ef..81e942f713e6 100644 --- a/drivers/net/can/usb/ucan.c +++ b/drivers/net/can/usb/ucan.c @@ -792,7 +792,7 @@ static void ucan_read_bulk_callback(struct urb *urb) up);

usb_anchor_urb(urb, &up->rx_urbs); - ret = usb_submit_urb(urb, GFP_KERNEL); + ret = usb_submit_urb(urb, GFP_ATOMIC);

if (ret < 0) { netdev_err(up->netdev,