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catc: Use heap buffer for memory size test

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commit 2d6a0e9de03ee658a9adc3bfb2f0ca55dff1e478 upstream.

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>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: Brad Spengler <spender@grsecurity.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ben Hutchings 2017-02-04 16:57:04 +00:00 committed by Greg Kroah-Hartman
parent 40531b26ba
commit 65596042c3
1 changed files with 18 additions and 7 deletions
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25
drivers/net/usb/catc.c
View File

@ -777,7 +777,7 @@ static int catc_probe(struct usb_interface *intf, const struct usb_device_id *id
struct net_device *netdev;
struct catc *catc;
u8 broadcast[ETH_ALEN];
int i, pktsz, ret;
int pktsz, ret;
if (usb_set_interface(usbdev,
intf->altsetting->desc.bInterfaceNumber, 1)) {
@ -841,15 +841,24 @@ static int catc_probe(struct usb_interface *intf, const struct usb_device_id *id
catc->irq_buf, 2, catc_irq_done, catc, 1);
if (!catc->is_f5u011) {
u32 *buf;
int i;
dev_dbg(dev, "Checking memory size\n");
i = 0x12345678;
catc_write_mem(catc, 0x7a80, &i, 4);
i = 0x87654321;
catc_write_mem(catc, 0xfa80, &i, 4);
catc_read_mem(catc, 0x7a80, &i, 4);
buf = kmalloc(4, GFP_KERNEL);
if (!buf) {
ret = -ENOMEM;
goto fail_free;
}
*buf = 0x12345678;
catc_write_mem(catc, 0x7a80, buf, 4);
*buf = 0x87654321;
catc_write_mem(catc, 0xfa80, buf, 4);
catc_read_mem(catc, 0x7a80, buf, 4);
switch (i) {
switch (*buf) {
case 0x12345678:
catc_set_reg(catc, TxBufCount, 8);
catc_set_reg(catc, RxBufCount, 32);
@ -864,6 +873,8 @@ static int catc_probe(struct usb_interface *intf, const struct usb_device_id *id
dev_dbg(dev, "32k Memory\n");
break;
}
kfree(buf);
dev_dbg(dev, "Getting MAC from SEEROM.\n");