This is a note to let you know that I've just added the patch titled
can: ucan: fix non-atomic allocation in completion handler
to the 5.3-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
can-ucan-fix-non-atomic-allocation-in-completion-handler.patch
and it can be found in the queue-5.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 870db5d1015c8bd63e93b579e857223c96249ff7 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@xxxxxxxxxx>
Date: Thu, 28 Nov 2019 19:26:03 +0100
Subject: can: ucan: fix non-atomic allocation in completion handler
From: Johan Hovold <johan@xxxxxxxxxx>
commit 870db5d1015c8bd63e93b579e857223c96249ff7 upstream.
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@xxxxxxxxxxxxxxx> # 4.19
Cc: Jakob Unterwurzacher <jakob.unterwurzacher@xxxxxxxxxxxxxxxxxxxxx>
Cc: Martin Elshuber <martin.elshuber@xxxxxxxxxxxxxxxxxxxxx>
Cc: Philipp Tomsich <philipp.tomsich@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/can/usb/ucan.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/can/usb/ucan.c
+++ b/drivers/net/can/usb/ucan.c
@@ -792,7 +792,7 @@ resubmit:
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,
Patches currently in stable-queue which might be from johan@xxxxxxxxxx are
queue-5.3/drm-msm-fix-memleak-on-release.patch
queue-5.3/can-ucan-fix-non-atomic-allocation-in-completion-handler.patch
