/*
 * netsniff-ng - the packet sniffing beast
 * Copyright 2012 Markus Amend <markus@netsniff-ng.org>, Deutsche Flugsicherung GmbH
 * Subject to the GPL, version 2.
 *
 * IPv6 Fragmentation Header described in RFC2460
 */

#include <stdio.h>
#include <stdint.h>
#include <netinet/in.h>    /* for ntohs() */

#include "proto.h"
#include "protos.h"
#include "dissector_eth.h"
#include "built_in.h"
#include "pkt_buff.h"

struct fragmhdr {
	uint8_t h_fragm_next_header;
	uint8_t h_fragm_reserved;
	uint16_t h_fragm_off_res_M;	
	uint32_t h_fragm_identification;
} __packed;

static void fragm(struct pkt_buff *pkt)
{
	uint16_t off_res_M;
	struct fragmhdr *fragm_ops;

	fragm_ops = (struct fragmhdr *) pkt_pull(pkt, sizeof(*fragm_ops));
	if (fragm_ops == NULL)
		return;

	off_res_M = ntohs(fragm_ops->h_fragm_off_res_M);
	
	tprintf("\t [ Fragment ");
	tprintf("NextHdr (%u), ", fragm_ops->h_fragm_next_header);
	tprintf("Reserved (%u), ", fragm_ops->h_fragm_reserved);
	tprintf("Offset (%u), ", off_res_M >> 3);
	tprintf("Res (%u), ", (off_res_M >> 1) & 0x3);
	tprintf("M flag (%u), ", off_res_M & 0x1);
	tprintf("Identification (%u)",
		ntohl(fragm_ops->h_fragm_identification));
	tprintf(" ]\n");

	pkt_set_proto(pkt, &eth_lay3, fragm_ops->h_fragm_next_header);
}

static void fragm_less(struct pkt_buff *pkt)
{
	uint16_t off_res_M;
	struct fragmhdr *fragm_ops;

	fragm_ops = (struct fragmhdr *) pkt_pull(pkt, sizeof(*fragm_ops));
	if (fragm_ops == NULL)
		return;

	off_res_M = ntohs(fragm_ops->h_fragm_off_res_M);

	tprintf(" FragmOffs %u", off_res_M >> 3);

	pkt_set_proto(pkt, &eth_lay3, fragm_ops->h_fragm_next_header);
}

struct protocol ipv6_fragm_ops = {
	.key = 0x2C,
	.print_full = fragm,
	.print_less = fragm_less,
};
xt.git/log/net/ceph/pagelist.c'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/net/ceph/pagelist.c?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/net/ceph/pagelist.c?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/net/ceph/pagelist.c?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/net/ceph/pagelist.c'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/ceph?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>ceph</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/ceph/pagelist.c?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>pagelist.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='07cd12945551b63ecb1a349d50a6d69d1d6feb4a'/><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>Tejun Heo &lt;tj@kernel.org&gt;</td><td class='right'>2017-01-26 16:47:28 -0500</td></tr>
<tr><th>committer</th><td>Tejun Heo &lt;tj@kernel.org&gt;</td><td class='right'>2017-01-26 16:47:28 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/ceph/pagelist.c?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>07cd12945551b63ecb1a349d50a6d69d1d6feb4a</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/ceph/pagelist.c?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>75f65eba7eac9277971082a2d5a4cf1370562c0c</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/ceph/pagelist.c?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>net/ceph/pagelist.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/ceph/pagelist.c?id=7ce7d89f48834cefece7804d38fc5d85382edf77'>7ce7d89f48834cefece7804d38fc5d85382edf77</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/ceph/pagelist.c?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a&amp;id2=7ce7d89f48834cefece7804d38fc5d85382edf77'>diff</a>)</td></tr></table>
<div class='commit-subject'>cgroup: don't online subsystems before cgroup_name/path() are operational</div><div class='commit-msg'>While refactoring cgroup creation, a5bca2152036 ("cgroup: factor out
cgroup_create() out of cgroup_mkdir()") incorrectly onlined subsystems
before the new cgroup is associated with it kernfs_node.  This is fine
for cgroup proper but cgroup_name/path() depend on the associated
kernfs_node and if a subsystem makes the new cgroup_subsys_state
visible, which they're allowed to after onlining, it can lead to NULL
dereference.

The current code performs cgroup creation and subsystem onlining in
cgroup_create() and cgroup_mkdir() makes the cgroup and subsystems
visible afterwards.  There's no reason to online the subsystems early
and we can simply drop cgroup_apply_control_enable() call from
cgroup_create() so that the subsystems are onlined and made visible at
the same time.

Signed-off-by: Tejun Heo &lt;tj@kernel.org&gt;
Reported-by: Konstantin Khlebnikov &lt;khlebnikov@yandex-team.ru&gt;
Fixes: a5bca2152036 ("cgroup: factor out cgroup_create() out of cgroup_mkdir()") 
Cc: stable@vger.kernel.org # v4.6+
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>Diffstat</a> (limited to 'net/ceph/pagelist.c')</div><table summary='diffstat' class='diffstat'>