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dd8dbf2e68
For SELinux to do better filtering in userspace we send the name of the
module along with the AVC denial when a program is denied module_request.
Example output:
type=SYSCALL msg=audit(11/03/2009 10:59:43.510:9) : arch=x86_64 syscall=write success=yes exit=2 a0=3 a1=7fc28c0d56c0 a2=2 a3=7fffca0d7440 items=0 ppid=1727 pid=1729 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=rpc.nfsd exe=/usr/sbin/rpc.nfsd subj=system_u:system_r:nfsd_t:s0 key=(null)
type=AVC msg=audit(11/03/2009 10:59:43.510:9) : avc: denied { module_request } for pid=1729 comm=rpc.nfsd kmod="net-pf-10" scontext=system_u:system_r:nfsd_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=system
Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
120 lines
2.6 KiB
C
120 lines
2.6 KiB
C
/*
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* Common LSM logging functions
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* Heavily borrowed from selinux/avc.h
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*
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* Author : Etienne BASSET <etienne.basset@ensta.org>
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*
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* All credits to : Stephen Smalley, <sds@epoch.ncsc.mil>
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* All BUGS to : Etienne BASSET <etienne.basset@ensta.org>
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*/
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#ifndef _LSM_COMMON_LOGGING_
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#define _LSM_COMMON_LOGGING_
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#include <linux/stddef.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/kdev_t.h>
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#include <linux/spinlock.h>
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#include <linux/init.h>
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#include <linux/audit.h>
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#include <linux/in6.h>
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#include <linux/path.h>
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#include <linux/key.h>
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#include <linux/skbuff.h>
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#include <asm/system.h>
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/* Auxiliary data to use in generating the audit record. */
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struct common_audit_data {
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char type;
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#define LSM_AUDIT_DATA_FS 1
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#define LSM_AUDIT_DATA_NET 2
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#define LSM_AUDIT_DATA_CAP 3
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#define LSM_AUDIT_DATA_IPC 4
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#define LSM_AUDIT_DATA_TASK 5
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#define LSM_AUDIT_DATA_KEY 6
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#define LSM_AUDIT_NO_AUDIT 7
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#define LSM_AUDIT_DATA_KMOD 8
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struct task_struct *tsk;
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union {
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struct {
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struct path path;
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struct inode *inode;
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} fs;
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struct {
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int netif;
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struct sock *sk;
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u16 family;
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__be16 dport;
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__be16 sport;
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union {
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struct {
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__be32 daddr;
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__be32 saddr;
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} v4;
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struct {
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struct in6_addr daddr;
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struct in6_addr saddr;
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} v6;
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} fam;
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} net;
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int cap;
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int ipc_id;
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struct task_struct *tsk;
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#ifdef CONFIG_KEYS
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struct {
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key_serial_t key;
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char *key_desc;
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} key_struct;
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#endif
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char *kmod_name;
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} u;
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/* this union contains LSM specific data */
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union {
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#ifdef CONFIG_SECURITY_SMACK
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/* SMACK data */
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struct smack_audit_data {
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const char *function;
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char *subject;
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char *object;
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char *request;
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int result;
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} smack_audit_data;
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#endif
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#ifdef CONFIG_SECURITY_SELINUX
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/* SELinux data */
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struct {
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u32 ssid;
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u32 tsid;
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u16 tclass;
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u32 requested;
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u32 audited;
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u32 denied;
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struct av_decision *avd;
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int result;
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} selinux_audit_data;
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#endif
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};
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/* these callback will be implemented by a specific LSM */
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void (*lsm_pre_audit)(struct audit_buffer *, void *);
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void (*lsm_post_audit)(struct audit_buffer *, void *);
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};
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#define v4info fam.v4
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#define v6info fam.v6
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int ipv4_skb_to_auditdata(struct sk_buff *skb,
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struct common_audit_data *ad, u8 *proto);
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int ipv6_skb_to_auditdata(struct sk_buff *skb,
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struct common_audit_data *ad, u8 *proto);
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/* Initialize an LSM audit data structure. */
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#define COMMON_AUDIT_DATA_INIT(_d, _t) \
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{ memset((_d), 0, sizeof(struct common_audit_data)); \
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(_d)->type = LSM_AUDIT_DATA_##_t; }
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void common_lsm_audit(struct common_audit_data *a);
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#endif
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