/*
 * Copyright (C) 2008 IBM Corporation
 * Author: Mimi Zohar <zohar@us.ibm.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, version 2 of the License.
 *
 * File: integrity_audit.c
 *	Audit calls for the integrity subsystem
 */

#include <linux/fs.h>
#include <linux/gfp.h>
#include <linux/audit.h>
#include "integrity.h"

static int integrity_audit_info;

/* ima_audit_setup - enable informational auditing messages */
static int __init integrity_audit_setup(char *str)
{
	unsigned long audit;

	if (!kstrtoul(str, 0, &audit))
		integrity_audit_info = audit ? 1 : 0;
	return 1;
}
__setup("integrity_audit=", integrity_audit_setup);

void integrity_audit_msg(int audit_msgno, struct inode *inode,
			 const unsigned char *fname, const char *op,
			 const char *cause, int result, int audit_info)
{
	struct audit_buffer *ab;
	char name[TASK_COMM_LEN];

	if (!integrity_audit_info && audit_info == 1)	/* Skip info messages */
		return;

	ab = audit_log_start(current->audit_context, GFP_KERNEL, audit_msgno);
	audit_log_format(ab, "pid=%d uid=%u auid=%u ses=%u",
			 task_pid_nr(current),
			 from_kuid(&init_user_ns, current_cred()->uid),
			 from_kuid(&init_user_ns, audit_get_loginuid(current)),
			 audit_get_sessionid(current));
	audit_log_task_context(ab);
	audit_log_format(ab, " op=");
	audit_log_string(ab, op);
	audit_log_format(ab, " cause=");
	audit_log_string(ab, cause);
	audit_log_format(ab, " comm=");
	audit_log_untrustedstring(ab, get_task_comm(name, current));
	if (fname) {
		audit_log_format(ab, " name=");
		audit_log_untrustedstring(ab, fname);
	}
	if (inode) {
		audit_log_format(ab, " dev=");
		audit_log_untrustedstring(ab, inode->i_sb->s_id);
		audit_log_format(ab, " ino=%lu", inode->i_ino);
	}
	audit_log_format(ab, " res=%d", !result);
	audit_log_end(ab);
}
x/net-next.git/commit/sound/soc/codecs/wm8900.c?id=433e19cf33d34bb6751c874a9c00980552fe508c'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/sound/soc/codecs/wm8900.c?id=433e19cf33d34bb6751c874a9c00980552fe508c'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/sound/soc/codecs/wm8900.c'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=433e19cf33d34bb6751c874a9c00980552fe508c'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound?id=433e19cf33d34bb6751c874a9c00980552fe508c'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/soc?id=433e19cf33d34bb6751c874a9c00980552fe508c'>soc</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/codecs?id=433e19cf33d34bb6751c874a9c00980552fe508c'>codecs</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/codecs/wm8900.c?id=433e19cf33d34bb6751c874a9c00980552fe508c'>wm8900.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='433e19cf33d34bb6751c874a9c00980552fe508c'/><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>Dexuan Cui &lt;decui@microsoft.com&gt;</td><td class='right'>2017-01-28 11:46:02 -0700</td></tr>
<tr><th>committer</th><td>Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;</td><td class='right'>2017-01-31 10:59:48 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/codecs/wm8900.c?id=433e19cf33d34bb6751c874a9c00980552fe508c'>433e19cf33d34bb6751c874a9c00980552fe508c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/soc/codecs/wm8900.c?id=433e19cf33d34bb6751c874a9c00980552fe508c'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=433e19cf33d34bb6751c874a9c00980552fe508c'>ce6547ef2987fbb289fa28f03536328a42781651</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/soc/codecs/wm8900.c?id=433e19cf33d34bb6751c874a9c00980552fe508c'>sound/soc/codecs/wm8900.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/codecs/wm8900.c?id=191e885a2e130e639bb0c8ee350d7047294f2ce6'>191e885a2e130e639bb0c8ee350d7047294f2ce6</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/soc/codecs/wm8900.c?id=433e19cf33d34bb6751c874a9c00980552fe508c&amp;id2=191e885a2e130e639bb0c8ee350d7047294f2ce6'>diff</a>)</td></tr></table>
<div class='commit-subject'>Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()</div><div class='commit-msg'>Commit a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in
hv_need_to_signal_on_read()")
added the proper mb(), but removed the test "prev_write_sz &lt; pending_sz"
when making the signal decision.

As a result, the guest can signal the host unnecessarily,
and then the host can throttle the guest because the host
thinks the guest is buggy or malicious; finally the user
running stress test can perceive intermittent freeze of
the guest.

This patch brings back the test, and properly handles the
in-place consumption APIs used by NetVSC (see get_next_pkt_raw(),
put_pkt_raw() and commit_rd_index()).

Fixes: a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in
hv_need_to_signal_on_read()")

Signed-off-by: Dexuan Cui &lt;decui@microsoft.com&gt;
Reported-by: Rolf Neugebauer &lt;rolf.neugebauer@docker.com&gt;
Tested-by: Rolf Neugebauer &lt;rolf.neugebauer@docker.com&gt;
Cc: "K. Y. Srinivasan" &lt;kys@microsoft.com&gt;
Cc: Haiyang Zhang &lt;haiyangz@microsoft.com&gt;
Cc: Stephen Hemminger &lt;sthemmin@microsoft.com&gt;
Cc: &lt;stable@vger.kernel.org&gt;
Signed-off-by: K. Y. Srinivasan &lt;kys@microsoft.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=433e19cf33d34bb6751c874a9c00980552fe508c'>Diffstat</a> (limited to 'sound/soc/codecs/wm8900.c')</div><table summary='diffstat' class='diffstat'>