From: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>
This patch has been added to the 3.12 stable tree. If you have any
objections, please let us know.
===============
commit 5a5a1d614287a647b36dff3f40c2b0ceabbc83ec upstream.
There is an allocation with GFP_KERNEL flag in mos7720_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: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/usb/serial/mos7720.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c
index 84657e07dc5d..d40e1dccb998 100644
--- a/drivers/usb/serial/mos7720.c
+++ b/drivers/usb/serial/mos7720.c
@@ -1249,7 +1249,7 @@ static int mos7720_write(struct tty_struct *tty, struct usb_serial_port *port,
if (urb->transfer_buffer == NULL) {
urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
- GFP_KERNEL);
+ GFP_ATOMIC);
if (urb->transfer_buffer == NULL) {
dev_err_console(port, "%s no more kernel memory...\n",
__func__);
--
2.10.0
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