cregit-Linux how code gets into the kernel

Release 4.10 security/selinux/netlink.c

Directory: security/selinux
/*
 * Netlink event notifications for SELinux.
 *
 * Author: James Morris <jmorris@redhat.com>
 *
 * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
 *
 * 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.
 */
#include <linux/init.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/skbuff.h>
#include <linux/selinux_netlink.h>
#include <net/net_namespace.h>
#include <net/netlink.h>

#include "security.h"


static struct sock *selnl;


static int selnl_msglen(int msgtype) { int ret = 0; switch (msgtype) { case SELNL_MSG_SETENFORCE: ret = sizeof(struct selnl_msg_setenforce); break; case SELNL_MSG_POLICYLOAD: ret = sizeof(struct selnl_msg_policyload); break; default: BUG(); } return ret; }

Contributors

PersonTokensPropCommitsCommitProp
david s. millerdavid s. miller51100.00%1100.00%
Total51100.00%1100.00%


static void selnl_add_payload(struct nlmsghdr *nlh, int len, int msgtype, void *data) { switch (msgtype) { case SELNL_MSG_SETENFORCE: { struct selnl_msg_setenforce *msg = nlmsg_data(nlh); memset(msg, 0, len); msg->val = *((int *)data); break; } case SELNL_MSG_POLICYLOAD: { struct selnl_msg_policyload *msg = nlmsg_data(nlh); memset(msg, 0, len); msg->seqno = *((u32 *)data); break; } default: BUG(); } }

Contributors

PersonTokensPropCommitsCommitProp
david s. millerdavid s. miller107100.00%2100.00%
Total107100.00%2100.00%


static void selnl_notify(int msgtype, void *data) { int len; sk_buff_data_t tmp; struct sk_buff *skb; struct nlmsghdr *nlh; len = selnl_msglen(msgtype); skb = nlmsg_new(len, GFP_USER); if (!skb) goto oom; tmp = skb->tail; nlh = nlmsg_put(skb, 0, 0, msgtype, len, 0); if (!nlh) goto out_kfree_skb; selnl_add_payload(nlh, len, msgtype, data); nlh->nlmsg_len = skb->tail - tmp; NETLINK_CB(skb).dst_group = SELNLGRP_AVC; netlink_broadcast(selnl, skb, 0, SELNLGRP_AVC, GFP_USER); out: return; out_kfree_skb: kfree_skb(skb); oom: printk(KERN_ERR "SELinux: OOM in %s\n", __func__); goto out; }

Contributors

PersonTokensPropCommitsCommitProp
david s. millerdavid s. miller13791.33%228.57%
patrick mchardypatrick mchardy106.67%228.57%
harvey harrisonharvey harrison10.67%114.29%
arnaldo carvalho de meloarnaldo carvalho de melo10.67%114.29%
hong zhi guohong zhi guo10.67%114.29%
Total150100.00%7100.00%


void selnl_notify_setenforce(int val) { selnl_notify(SELNL_MSG_SETENFORCE, &val); }

Contributors

PersonTokensPropCommitsCommitProp
david s. millerdavid s. miller16100.00%1100.00%
Total16100.00%1100.00%


void selnl_notify_policyload(u32 seqno) { selnl_notify(SELNL_MSG_POLICYLOAD, &seqno); }

Contributors

PersonTokensPropCommitsCommitProp
david s. millerdavid s. miller16100.00%1100.00%
Total16100.00%1100.00%


static int __init selnl_init(void) { struct netlink_kernel_cfg cfg = { .groups = SELNLGRP_MAX, .flags = NL_CFG_F_NONROOT_RECV, }; selnl = netlink_kernel_create(&init_net, NETLINK_SELINUX, &cfg); if (selnl == NULL) panic("SELinux: Cannot create netlink socket."); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
david s. millerdavid s. miller3159.62%125.00%
pablo neira ayusopablo neira ayuso1834.62%250.00%
eric w. biedermaneric w. biederman35.77%125.00%
Total52100.00%4100.00%

__initcall(selnl_init);

Overall Contributors

PersonTokensPropCommitsCommitProp
david s. millerdavid s. miller39389.93%215.38%
pablo neira ayusopablo neira ayuso184.12%215.38%
patrick mchardypatrick mchardy102.29%215.38%
eric w. biedermaneric w. biederman61.37%17.69%
paul gortmakerpaul gortmaker30.69%17.69%
james morrisjames morris30.69%17.69%
hong zhi guohong zhi guo10.23%17.69%
harvey harrisonharvey harrison10.23%17.69%
arnaldo carvalho de meloarnaldo carvalho de melo10.23%17.69%
tejun heotejun heo10.23%17.69%
Total437100.00%13100.00%
Directory: security/selinux
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