This is a note to let you know that I've just added the patch titled
USB: serial: mos7840: fix non-atomic allocation in write path
to the 4.4-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:
usb-serial-mos7840-fix-non-atomic-allocation-in-write-path.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3b7c7e52efda0d4640060de747768360ba70a7c0 Mon Sep 17 00:00:00 2001
From: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>
Date: Fri, 12 Aug 2016 01:05:09 +0300
Subject: USB: serial: mos7840: fix non-atomic allocation in write path
From: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>
commit 3b7c7e52efda0d4640060de747768360ba70a7c0 upstream.
There is an allocation with GFP_KERNEL flag in mos7840_write(),
while it may be called from interrupt context.
Follow-up for commit 191252837626 ("USB: kobil_sct: fix non-atomic
allocation in write path")
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/serial/mos7840.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -1340,8 +1340,8 @@ static int mos7840_write(struct tty_stru
}
if (urb->transfer_buffer == NULL) {
- urb->transfer_buffer =
- kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
+ urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
+ GFP_ATOMIC);
if (!urb->transfer_buffer)
goto exit;
}
Patches currently in stable-queue which might be from khoroshilov@xxxxxxxxx are
queue-4.4/usb-serial-mos7840-fix-non-atomic-allocation-in-write-path.patch
queue-4.4/usb-serial-mos7720-fix-non-atomic-allocation-in-write-path.patch
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