/*
 * UWB PAL support.
 *
 * Copyright (C) 2008 Cambridge Silicon Radio Ltd.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 as published by the Free Software Foundation.
 *
 * 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 <linux/kernel.h>
#include <linux/debugfs.h>
#include <linux/uwb.h>
#include <linux/export.h>

#include "uwb-internal.h"

/**
 * uwb_pal_init - initialize a UWB PAL
 * @pal: the PAL to initialize
 */
void uwb_pal_init(struct uwb_pal *pal)
{
	INIT_LIST_HEAD(&pal->node);
}
EXPORT_SYMBOL_GPL(uwb_pal_init);

/**
 * uwb_pal_register - register a UWB PAL
 * @pal: the PAL
 *
 * The PAL must be initialized with uwb_pal_init().
 */
int uwb_pal_register(struct uwb_pal *pal)
{
	struct uwb_rc *rc = pal->rc;
	int ret;

	if (pal->device) {
		/* create a link to the uwb_rc in the PAL device's directory. */
		ret = sysfs_create_link(&pal->device->kobj,
					&rc->uwb_dev.dev.kobj, "uwb_rc");
		if (ret < 0)
			return ret;
		/* create a link to the PAL in the UWB device's directory. */
		ret = sysfs_create_link(&rc->uwb_dev.dev.kobj,
					&pal->device->kobj, pal->name);
		if (ret < 0) {
			sysfs_remove_link(&pal->device->kobj, "uwb_rc");
			return ret;
		}
	}

	pal->debugfs_dir = uwb_dbg_create_pal_dir(pal);

	mutex_lock(&rc->uwb_dev.mutex);
	list_add(&pal->node, &rc->pals);
	mutex_unlock(&rc->uwb_dev.mutex);

	return 0;
}
EXPORT_SYMBOL_GPL(uwb_pal_register);

static int find_rc(struct device *dev, const void *data)
{
	const struct uwb_rc *target_rc = data;
	struct uwb_rc *rc = dev_get_drvdata(dev);

	if (rc == NULL) {
		WARN_ON(1);
		return 0;
	}
	if (rc == target_rc) {
		if (rc->ready == 0)
			return 0;
		else
			return 1;
	}
	return 0;
}

/**
 * Given a radio controller descriptor see if it is registered.
 *
 * @returns false if the rc does not exist or is quiescing; true otherwise.
 */
static bool uwb_rc_class_device_exists(struct uwb_rc *target_rc)
{
	struct device *dev;

	dev = class_find_device(&uwb_rc_class, NULL, target_rc,	find_rc);

	put_device(dev);

	return (dev != NULL);
}

/**
 * uwb_pal_unregister - unregister a UWB PAL
 * @pal: the PAL
 */
void uwb_pal_unregister(struct uwb_pal *pal)
{
	struct uwb_rc *rc = pal->rc;

	uwb_radio_stop(pal);

	mutex_lock(&rc->uwb_dev.mutex);
	list_del(&pal->node);
	mutex_unlock(&rc->uwb_dev.mutex);

	debugfs_remove(pal->debugfs_dir);

	if (pal->device) {
		/* remove link to the PAL in the UWB device's directory. */
		if (uwb_rc_class_device_exists(rc))
			sysfs_remove_link(&rc->uwb_dev.dev.kobj, pal->name);

		/* remove link to uwb_rc in the PAL device's directory. */
		sysfs_remove_link(&pal->device->kobj, "uwb_rc");
	}
}
EXPORT_SYMBOL_GPL(uwb_pal_unregister);

/**
 * uwb_rc_pal_init - initialize the PAL related parts of a radio controller
 * @rc: the radio controller
 */
void uwb_rc_pal_init(struct uwb_rc *rc)
{
	INIT_LIST_HEAD(&rc->pals);
}
net-next.git/commit/security/keys/encrypted-keys/encrypted.c?id=02608e02fbec04fccf2eb0cc8d8082f65c0a4286'>encrypted.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='02608e02fbec04fccf2eb0cc8d8082f65c0a4286'/><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>Laura Abbott &lt;labbott@redhat.com&gt;</td><td class='right'>2016-12-21 12:32:54 -0800</td></tr>
<tr><th>committer</th><td>Herbert Xu &lt;herbert@gondor.apana.org.au&gt;</td><td class='right'>2016-12-27 17:32:11 +0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/security/keys/encrypted-keys/encrypted.c?id=02608e02fbec04fccf2eb0cc8d8082f65c0a4286'>02608e02fbec04fccf2eb0cc8d8082f65c0a4286</a> (<a href='/cgit.cgi/linux/net-next.git/patch/security/keys/encrypted-keys/encrypted.c?id=02608e02fbec04fccf2eb0cc8d8082f65c0a4286'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=02608e02fbec04fccf2eb0cc8d8082f65c0a4286'>37ff0410d130cfe77185f591b07cd6403f207f0c</a> /<a href='/cgit.cgi/linux/net-next.git/tree/security/keys/encrypted-keys/encrypted.c?id=02608e02fbec04fccf2eb0cc8d8082f65c0a4286'>security/keys/encrypted-keys/encrypted.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/security/keys/encrypted-keys/encrypted.c?id=7ce7d89f48834cefece7804d38fc5d85382edf77'>7ce7d89f48834cefece7804d38fc5d85382edf77</a> (<a href='/cgit.cgi/linux/net-next.git/diff/security/keys/encrypted-keys/encrypted.c?id=02608e02fbec04fccf2eb0cc8d8082f65c0a4286&amp;id2=7ce7d89f48834cefece7804d38fc5d85382edf77'>diff</a>)</td></tr></table>
<div class='commit-subject'>crypto: testmgr - Use heap buffer for acomp test input</div><div class='commit-msg'>Christopher Covington reported a crash on aarch64 on recent Fedora
kernels:

kernel BUG at ./include/linux/scatterlist.h:140!
Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
Modules linked in:
CPU: 2 PID: 752 Comm: cryptomgr_test Not tainted 4.9.0-11815-ge93b1cc #162
Hardware name: linux,dummy-virt (DT)
task: ffff80007c650080 task.stack: ffff800008910000
PC is at sg_init_one+0xa0/0xb8
LR is at sg_init_one+0x24/0xb8
...
[&lt;ffff000008398db8&gt;] sg_init_one+0xa0/0xb8
[&lt;ffff000008350a44&gt;] test_acomp+0x10c/0x438
[&lt;ffff000008350e20&gt;] alg_test_comp+0xb0/0x118
[&lt;ffff00000834f28c&gt;] alg_test+0x17c/0x2f0
[&lt;ffff00000834c6a4&gt;] cryptomgr_test+0x44/0x50
[&lt;ffff0000080dac70&gt;] kthread+0xf8/0x128
[&lt;ffff000008082ec0&gt;] ret_from_fork+0x10/0x50

The test vectors used for input are part of the kernel image. These
inputs are passed as a buffer to sg_init_one which eventually blows up
with BUG_ON(!virt_addr_valid(buf)). On arm64, virt_addr_valid returns
false for the kernel image since virt_to_page will not return the
correct page. Fix this by copying the input vectors to heap buffer
before setting up the scatterlist.

Reported-by: Christopher Covington &lt;cov@codeaurora.org&gt;
Fixes: d7db7a882deb ("crypto: acomp - update testmgr with support for acomp")
Signed-off-by: Laura Abbott &lt;labbott@redhat.com&gt;
Signed-off-by: Herbert Xu &lt;herbert@gondor.apana.org.au&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=02608e02fbec04fccf2eb0cc8d8082f65c0a4286'>Diffstat</a> (limited to 'security/keys/encrypted-keys/encrypted.c')</div><table summary='diffstat' class='diffstat'>