[PATCH 4.4 097/113] USB: serial: mos7720: fix non-atomic allocation in write path
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2016-09-05 16:56:27
Also in:
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4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Alexey Khoroshilov <redacted>
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 <redacted>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/serial/mos7720.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/usb/serial/mos7720.c
+++ b/drivers/usb/serial/mos7720.c@@ -1252,7 +1252,7 @@ static int mos7720_write(struct tty_stru if (urb->transfer_buffer == NULL) { urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, - GFP_KERNEL); + GFP_ATOMIC); if (!urb->transfer_buffer) goto exit; }