From: Ben Hutchings <ben@decadent•org.uk>
To: netdev@vger•kernel.org
Cc: linux-usb@vger•kernel.org, Petko Manolov <petkan@nucleusys•com>
Subject: [PATCH net 2/4] rtl8150: Use heap buffers for all register access
Date: Sat, 4 Feb 2017 16:56:32 +0000 [thread overview]
Message-ID: <20170204165631.GW3442@decadent.org.uk> (raw)
In-Reply-To: <20170204165451.GU3442@decadent.org.uk>
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Allocating USB buffers on the stack is not portable, and no longer
works on x86_64 (with VMAP_STACK enabled as per default).
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Ben Hutchings <ben@decadent•org.uk>
---
drivers/net/usb/rtl8150.c | 34 +++++++++++++++++++++++++++-------
1 file changed, 27 insertions(+), 7 deletions(-)
diff --git a/drivers/net/usb/rtl8150.c b/drivers/net/usb/rtl8150.c
index 95b7bd0d7abc..c81c79110cef 100644
--- a/drivers/net/usb/rtl8150.c
+++ b/drivers/net/usb/rtl8150.c
@@ -155,16 +155,36 @@ static const char driver_name [] = "rtl8150";
*/
static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
{
- return usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
- RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
- indx, 0, data, size, 500);
+ void *buf;
+ int ret;
+
+ buf = kmalloc(size, GFP_NOIO);
+ if (!buf)
+ return -ENOMEM;
+
+ ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
+ RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
+ indx, 0, buf, size, 500);
+ if (ret > 0 && ret <= size)
+ memcpy(data, buf, ret);
+ kfree(buf);
+ return ret;
}
-static int set_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
+static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data)
{
- return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
- RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
- indx, 0, data, size, 500);
+ void *buf;
+ int ret;
+
+ buf = kmemdup(data, size, GFP_NOIO);
+ if (!buf)
+ return -ENOMEM;
+
+ ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
+ RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
+ indx, 0, buf, size, 500);
+ kfree(buf);
+ return ret;
}
static void async_set_reg_cb(struct urb *urb)
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next prev parent reply other threads:[~2017-02-04 16:56 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-04 16:54 [PATCH net 0/4] Fix on-stack USB buffers Ben Hutchings
2017-02-04 16:56 ` [PATCH net 1/4] pegasus: Use heap buffers for all register access Ben Hutchings
2017-02-05 0:30 ` Greg KH
2017-02-06 8:14 ` Petko Manolov
2017-02-06 8:28 ` Greg KH
2017-02-06 12:51 ` Petko Manolov
2017-02-06 13:21 ` Johan Hovold
2017-02-06 13:32 ` Johan Hovold
2017-02-06 13:46 ` Johan Hovold
2017-02-07 10:24 ` Petko Manolov
2017-02-07 10:45 ` Greg KH
[not found] ` <20170207104506.GB32583-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2017-02-07 12:50 ` Petko Manolov
2017-02-06 13:30 ` David Laight
2017-02-07 18:32 ` Steve Calfee
2017-02-08 7:57 ` Petko Manolov
2017-02-04 16:56 ` Ben Hutchings [this message]
2017-02-06 8:10 ` [PATCH net 2/4] rtl8150: " Petko Manolov
[not found] ` <20170204165631.GW3442-/+tVBieCtBitmTQ+vhA3Yw@public.gmane.org>
2017-02-06 16:09 ` David Laight
2017-02-06 16:25 ` Ben Hutchings
2017-02-07 10:34 ` Petko Manolov
2017-02-07 10:51 ` Greg KH
2017-02-07 11:56 ` David Laight
[not found] ` <063D6719AE5E284EB5DD2968C1650D6DB027DB75-VkEWCZq2GCInGFn1LkZF6NBPR1lH4CV8@public.gmane.org>
2017-02-07 12:42 ` 'Greg KH'
2017-02-07 12:53 ` Petko Manolov
2017-02-07 13:01 ` Greg KH
2017-02-07 13:20 ` Petko Manolov
2017-02-07 14:14 ` David Laight
2017-02-07 14:52 ` Petko Manolov
[not found] ` <20170204165451.GU3442-/+tVBieCtBitmTQ+vhA3Yw@public.gmane.org>
2017-02-04 16:56 ` [PATCH net 3/4] catc: Combine failure cleanup code in catc_probe() Ben Hutchings
2017-02-04 16:57 ` [PATCH net 4/4] catc: Use heap buffer for memory size test Ben Hutchings
2017-02-07 15:07 ` [PATCH net 0/4] Fix on-stack USB buffers David Miller
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