/*
 * Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
 *               2005-2007 Takahiro Hirofuchi
 * Copyright (C) 2015-2016 Samsung Electronics
 *               Igor Kotrasinski <i.kotrasinsk@samsung.com>
 *               Krzysztof Opasiak <k.opasiak@samsung.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include <unistd.h>
#include <libudev.h>

#include "usbip_host_common.h"
#include "usbip_host_driver.h"

#undef  PROGNAME
#define PROGNAME "libusbip"

static int is_my_device(struct udev_device *dev)
{
	const char *driver;

	driver = udev_device_get_driver(dev);
	return driver != NULL && !strcmp(driver, USBIP_HOST_DRV_NAME);
}

static int usbip_host_driver_open(struct usbip_host_driver *hdriver)
{
	int ret;

	hdriver->ndevs = 0;
	INIT_LIST_HEAD(&hdriver->edev_list);

	ret = usbip_generic_driver_open(hdriver);
	if (ret)
		err("please load " USBIP_CORE_MOD_NAME ".ko and "
		    USBIP_HOST_DRV_NAME ".ko!");
	return ret;
}

struct usbip_host_driver host_driver = {
	.edev_list = LIST_HEAD_INIT(host_driver.edev_list),
	.udev_subsystem = "usb",
	.ops = {
		.open = usbip_host_driver_open,
		.close = usbip_generic_driver_close,
		.refresh_device_list = usbip_generic_refresh_device_list,
		.get_device = usbip_generic_get_device,
		.read_device = read_usb_device,
		.read_interface = read_usb_interface,
		.is_my_device = is_my_device,
	},
};
c73714088a7252d276a57126d56c7d37e64'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/host/ehci-fsl.h?id=f1712c73714088a7252d276a57126d56c7d37e64'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/drivers/usb/host/ehci-fsl.h'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=f1712c73714088a7252d276a57126d56c7d37e64'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers?id=f1712c73714088a7252d276a57126d56c7d37e64'>drivers</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb?id=f1712c73714088a7252d276a57126d56c7d37e64'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/host?id=f1712c73714088a7252d276a57126d56c7d37e64'>host</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/host/ehci-fsl.h?id=f1712c73714088a7252d276a57126d56c7d37e64'>ehci-fsl.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='f1712c73714088a7252d276a57126d56c7d37e64'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Eric Dumazet &lt;edumazet@google.com&gt;</td><td class='right'>2017-01-27 08:11:44 -0800</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-01-29 18:30:56 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/host/ehci-fsl.h?id=f1712c73714088a7252d276a57126d56c7d37e64'>f1712c73714088a7252d276a57126d56c7d37e64</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/host/ehci-fsl.h?id=f1712c73714088a7252d276a57126d56c7d37e64'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=f1712c73714088a7252d276a57126d56c7d37e64'>962ee49daf8d1cba8403fcf03b315d4a142ec944</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/host/ehci-fsl.h?id=f1712c73714088a7252d276a57126d56c7d37e64'>drivers/usb/host/ehci-fsl.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/host/ehci-fsl.h?id=dc97a89e726c4e1830320d1db8215ef77ecebae0'>dc97a89e726c4e1830320d1db8215ef77ecebae0</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/host/ehci-fsl.h?id=f1712c73714088a7252d276a57126d56c7d37e64&amp;id2=dc97a89e726c4e1830320d1db8215ef77ecebae0'>diff</a>)</td></tr></table>
<div class='commit-subject'>can: Fix kernel panic at security_sock_rcv_skb</div><div class='commit-msg'>Zhang Yanmin reported crashes [1] and provided a patch adding a
synchronize_rcu() call in can_rx_unregister()

The main problem seems that the sockets themselves are not RCU
protected.

If CAN uses RCU for delivery, then sockets should be freed only after
one RCU grace period.

Recent kernels could use sock_set_flag(sk, SOCK_RCU_FREE), but let's
ease stable backports with the following fix instead.

[1]
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [&lt;ffffffff81495e25&gt;] selinux_socket_sock_rcv_skb+0x65/0x2a0

Call Trace:
 &lt;IRQ&gt;
 [&lt;ffffffff81485d8c&gt;] security_sock_rcv_skb+0x4c/0x60
 [&lt;ffffffff81d55771&gt;] sk_filter+0x41/0x210
 [&lt;ffffffff81d12913&gt;] sock_queue_rcv_skb+0x53/0x3a0
 [&lt;ffffffff81f0a2b3&gt;] raw_rcv+0x2a3/0x3c0
 [&lt;ffffffff81f06eab&gt;] can_rcv_filter+0x12b/0x370
 [&lt;ffffffff81f07af9&gt;] can_receive+0xd9/0x120
 [&lt;ffffffff81f07beb&gt;] can_rcv+0xab/0x100
 [&lt;ffffffff81d362ac&gt;] __netif_receive_skb_core+0xd8c/0x11f0
 [&lt;ffffffff81d36734&gt;] __netif_receive_skb+0x24/0xb0
 [&lt;ffffffff81d37f67&gt;] process_backlog+0x127/0x280
 [&lt;ffffffff81d36f7b&gt;] net_rx_action+0x33b/0x4f0
 [&lt;ffffffff810c88d4&gt;] __do_softirq+0x184/0x440
 [&lt;ffffffff81f9e86c&gt;] do_softirq_own_stack+0x1c/0x30
 &lt;EOI&gt;
 [&lt;ffffffff810c76fb&gt;] do_softirq.part.18+0x3b/0x40
 [&lt;ffffffff810c8bed&gt;] do_softirq+0x1d/0x20
 [&lt;ffffffff81d30085&gt;] netif_rx_ni+0xe5/0x110
 [&lt;ffffffff8199cc87&gt;] slcan_receive_buf+0x507/0x520
 [&lt;ffffffff8167ef7c&gt;] flush_to_ldisc+0x21c/0x230
 [&lt;ffffffff810e3baf&gt;] process_one_work+0x24f/0x670
 [&lt;ffffffff810e44ed&gt;] worker_thread+0x9d/0x6f0
 [&lt;ffffffff810e4450&gt;] ? rescuer_thread+0x480/0x480
 [&lt;ffffffff810ebafc&gt;] kthread+0x12c/0x150
 [&lt;ffffffff81f9ccef&gt;] ret_from_fork+0x3f/0x70

Reported-by: Zhang Yanmin &lt;yanmin.zhang@intel.com&gt;
Signed-off-by: Eric Dumazet &lt;edumazet@google.com&gt;
Acked-by: Oliver Hartkopp &lt;socketcan@hartkopp.net&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=f1712c73714088a7252d276a57126d56c7d37e64'>Diffstat</a> (limited to 'drivers/usb/host/ehci-fsl.h')</div><table summary='diffstat' class='diffstat'>