/*
 *  xenfs.c - a filesystem for passing info between the a domain and
 *  the hypervisor.
 *
 * 2008-10-07  Alex Zeffertt    Replaced /proc/xen/xenbus with xenfs filesystem
 *                              and /proc/xen compatibility mount point.
 *                              Turned xenfs into a loadable module.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/magic.h>

#include <xen/xen.h>

#include "xenfs.h"
#include "../privcmd.h"
#include "../xenbus/xenbus_comms.h"

#include <asm/xen/hypervisor.h>

MODULE_DESCRIPTION("Xen filesystem");
MODULE_LICENSE("GPL");

static ssize_t capabilities_read(struct file *file, char __user *buf,
				 size_t size, loff_t *off)
{
	char *tmp = "";

	if (xen_initial_domain())
		tmp = "control_d\n";

	return simple_read_from_buffer(buf, size, off, tmp, strlen(tmp));
}

static const struct file_operations capabilities_file_ops = {
	.read = capabilities_read,
	.llseek = default_llseek,
};

static int xenfs_fill_super(struct super_block *sb, void *data, int silent)
{
	static struct tree_descr xenfs_files[] = {
		[2] = { "xenbus", &xen_xenbus_fops, S_IRUSR|S_IWUSR },
		{ "capabilities", &capabilities_file_ops, S_IRUGO },
		{ "privcmd", &xen_privcmd_fops, S_IRUSR|S_IWUSR },
		{""},
	};

	static struct tree_descr xenfs_init_files[] = {
		[2] = { "xenbus", &xen_xenbus_fops, S_IRUSR|S_IWUSR },
		{ "capabilities", &capabilities_file_ops, S_IRUGO },
		{ "privcmd", &xen_privcmd_fops, S_IRUSR|S_IWUSR },
		{ "xsd_kva", &xsd_kva_file_ops, S_IRUSR|S_IWUSR},
		{ "xsd_port", &xsd_port_file_ops, S_IRUSR|S_IWUSR},
#ifdef CONFIG_XEN_SYMS
		{ "xensyms", &xensyms_ops, S_IRUSR},
#endif
		{""},
	};

	return simple_fill_super(sb, XENFS_SUPER_MAGIC,
			xen_initial_domain() ? xenfs_init_files : xenfs_files);
}

static struct dentry *xenfs_mount(struct file_system_type *fs_type,
				  int flags, const char *dev_name,
				  void *data)
{
	return mount_single(fs_type, flags, data, xenfs_fill_super);
}

static struct file_system_type xenfs_type = {
	.owner =	THIS_MODULE,
	.name =		"xenfs",
	.mount =	xenfs_mount,
	.kill_sb =	kill_litter_super,
};
MODULE_ALIAS_FS("xenfs");

static int __init xenfs_init(void)
{
	if (xen_domain())
		return register_filesystem(&xenfs_type);

	pr_info("not registering filesystem on non-xen platform\n");
	return 0;
}

static void __exit xenfs_exit(void)
{
	if (xen_domain())
		unregister_filesystem(&xenfs_type);
}

module_init(xenfs_init);
module_exit(xenfs_exit);

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<div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='c2b36129ce53a22b89dd2b88db33e7ffdefe0f41'/><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>Colin Ian King &lt;colin.king@canonical.com&gt;</td><td class='right'>2016-12-09 14:17:47 +0000</td></tr>
<tr><th>committer</th><td>Mark Brown &lt;broonie@kernel.org&gt;</td><td class='right'>2016-12-15 11:36:37 +0000</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=c2b36129ce53a22b89dd2b88db33e7ffdefe0f41'>c2b36129ce53a22b89dd2b88db33e7ffdefe0f41</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=c2b36129ce53a22b89dd2b88db33e7ffdefe0f41'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=c2b36129ce53a22b89dd2b88db33e7ffdefe0f41'>4e1d391586c745f556793f2b64a0bf9e041dba26</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=a5de5b74a50113564a1e0850e2da96c37c35e55d'>a5de5b74a50113564a1e0850e2da96c37c35e55d</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=c2b36129ce53a22b89dd2b88db33e7ffdefe0f41&amp;id2=a5de5b74a50113564a1e0850e2da96c37c35e55d'>diff</a>)</td></tr></table>
<div class='commit-subject'>ASoC: topology: kfree kcontrol-&gt;private_value before freeing kcontrol</div><div class='commit-msg'>kcontrol-&gt;private_value is being kfree'd after kcontrol has been freed
(in previous call to snd_ctl_remove).  Instead, fix this by kfreeing
the private_value before kcontrol.

CoverityScan CID#1388311 "Read from pointer after free"

Fixes: eea3dd4f1247a ("ASoC: topology: Only free TLV for volume mixers of a widget")
Signed-off-by: Colin Ian King &lt;colin.king@canonical.com&gt;
Signed-off-by: Mark Brown &lt;broonie@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=c2b36129ce53a22b89dd2b88db33e7ffdefe0f41'>Diffstat</a></div><table summary='diffstat' class='diffstat'>