This is a note to let you know that I've just added the patch titled
USB: mos7720: fix DMA to stack
to the 3.0-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-mos7720-fix-dma-to-stack.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 72ea18a558ed7a63a50bb121ba60d73b5b38ae30 Mon Sep 17 00:00:00 2001
From: Johan Hovold <[email protected]>
Date: Mon, 27 May 2013 14:44:39 +0200
Subject: USB: mos7720: fix DMA to stack
From: Johan Hovold <[email protected]>
commit 72ea18a558ed7a63a50bb121ba60d73b5b38ae30 upstream.
The read_mos_reg function is called with stack-allocated buffers, which
must not be used for control messages.
Signed-off-by: Johan Hovold <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/usb/serial/mos7720.c | 17 ++++++++++++++---
1 file changed, 14 insertions(+), 3 deletions(-)
--- a/drivers/usb/serial/mos7720.c
+++ b/drivers/usb/serial/mos7720.c
@@ -234,11 +234,22 @@ static int read_mos_reg(struct usb_seria
__u8 requesttype = (__u8)0xc0;
__u16 index = get_reg_index(reg);
__u16 value = get_reg_value(reg, serial_portnum);
- int status = usb_control_msg(usbdev, pipe, request, requesttype, value,
- index, data, 1, MOS_WDR_TIMEOUT);
- if (status < 0)
+ u8 *buf;
+ int status;
+
+ buf = kmalloc(1, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ status = usb_control_msg(usbdev, pipe, request, requesttype, value,
+ index, buf, 1, MOS_WDR_TIMEOUT);
+ if (status == 1)
+ *data = *buf;
+ else if (status < 0)
dev_err(&usbdev->dev,
"mos7720: usb_control_msg() failed: %d", status);
+ kfree(buf);
+
return status;
}
Patches currently in stable-queue which might be from [email protected] are
queue-3.0/usb-serial-fix-treo-kyocera-interrrupt-in-urb-context.patch
queue-3.0/usb-mos7720-fix-dma-to-stack.patch
queue-3.0/usb-iuu_phoenix-fix-bulk-message-timeout.patch
queue-3.0/usb-whiteheat-fix-broken-port-configuration.patch
queue-3.0/usb-mos7720-fix-hardware-flow-control.patch
queue-3.0/usb-keyspan-fix-bogus-array-index.patch
queue-3.0/usb-ark3116-fix-control-message-timeout.patch
queue-3.0/usb-mos7720-fix-message-timeouts.patch
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