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kernel-aes67/include/linux/audit.h
Steve Grubb 5bdb988680 [PATCH] promiscuous mode 
Hi,

When a network interface goes into promiscuous mode, its an important security
issue. The attached patch is intended to capture that action and send an
event to the audit system.

The patch carves out a new block of numbers for kernel detected anomalies.
These are events that may indicate suspicious activity. Other examples of
potential kernel anomalies would be: exceeding disk quota, rlimit violations,
changes to syscall entry table.

Signed-off-by: Steve Grubb <sgrubb@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-03-20 14:08:55 -05:00

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/* audit.h -- Auditing support
*
* Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
* All Rights Reserved.
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Written by Rickard E. (Rik) Faith <faith@redhat.com>
*
*/
#ifndef _LINUX_AUDIT_H_
#define _LINUX_AUDIT_H_
#include <linux/sched.h>
#include <linux/elf.h>
/* The netlink messages for the audit system is divided into blocks:
* 1000 - 1099 are for commanding the audit system
* 1100 - 1199 user space trusted application messages
* 1200 - 1299 messages internal to the audit daemon
* 1300 - 1399 audit event messages
* 1400 - 1499 SE Linux use
* 1500 - 1599 kernel LSPP events
* 1600 - 1699 kernel crypto events
* 1700 - 1799 kernel anomaly records
* 1800 - 1999 future kernel use (maybe integrity labels and related events)
* 2000 is for otherwise unclassified kernel audit messages (legacy)
* 2001 - 2099 unused (kernel)
* 2100 - 2199 user space anomaly records
* 2200 - 2299 user space actions taken in response to anomalies
* 2300 - 2399 user space generated LSPP events
* 2400 - 2499 user space crypto events
* 2500 - 2999 future user space (maybe integrity labels and related events)
*
* Messages from 1000-1199 are bi-directional. 1200-1299 & 2100 - 2999 are
* exclusively user space. 1300-2099 is kernel --> user space
* communication.
*/
#define AUDIT_GET 1000 /* Get status */
#define AUDIT_SET 1001 /* Set status (enable/disable/auditd) */
#define AUDIT_LIST 1002 /* List syscall rules -- deprecated */
#define AUDIT_ADD 1003 /* Add syscall rule -- deprecated */
#define AUDIT_DEL 1004 /* Delete syscall rule -- deprecated */
#define AUDIT_USER 1005 /* Message from userspace -- deprecated */
#define AUDIT_LOGIN 1006 /* Define the login id and information */
#define AUDIT_WATCH_INS 1007 /* Insert file/dir watch entry */
#define AUDIT_WATCH_REM 1008 /* Remove file/dir watch entry */
#define AUDIT_WATCH_LIST 1009 /* List all file/dir watches */
#define AUDIT_SIGNAL_INFO 1010 /* Get info about sender of signal to auditd */
#define AUDIT_ADD_RULE 1011 /* Add syscall filtering rule */
#define AUDIT_DEL_RULE 1012 /* Delete syscall filtering rule */
#define AUDIT_LIST_RULES 1013 /* List syscall filtering rules */
#define AUDIT_FIRST_USER_MSG 1100 /* Userspace messages mostly uninteresting to kernel */
#define AUDIT_USER_AVC 1107 /* We filter this differently */
#define AUDIT_LAST_USER_MSG 1199
#define AUDIT_FIRST_USER_MSG2 2100 /* More user space messages */
#define AUDIT_LAST_USER_MSG2 2999
#define AUDIT_DAEMON_START 1200 /* Daemon startup record */
#define AUDIT_DAEMON_END 1201 /* Daemon normal stop record */
#define AUDIT_DAEMON_ABORT 1202 /* Daemon error stop record */
#define AUDIT_DAEMON_CONFIG 1203 /* Daemon config change */
#define AUDIT_SYSCALL 1300 /* Syscall event */
#define AUDIT_FS_WATCH 1301 /* Filesystem watch event */
#define AUDIT_PATH 1302 /* Filename path information */
#define AUDIT_IPC 1303 /* IPC record */
#define AUDIT_SOCKETCALL 1304 /* sys_socketcall arguments */
#define AUDIT_CONFIG_CHANGE 1305 /* Audit system configuration change */
#define AUDIT_SOCKADDR 1306 /* sockaddr copied as syscall arg */
#define AUDIT_CWD 1307 /* Current working directory */
#define AUDIT_AVC 1400 /* SE Linux avc denial or grant */
#define AUDIT_SELINUX_ERR 1401 /* Internal SE Linux Errors */
#define AUDIT_AVC_PATH 1402 /* dentry, vfsmount pair from avc */
#define AUDIT_MAC_POLICY_LOAD 1403 /* Policy file load */
#define AUDIT_MAC_STATUS 1404 /* Changed enforcing,permissive,off */
#define AUDIT_MAC_CONFIG_CHANGE 1405 /* Changes to booleans */
#define AUDIT_FIRST_KERN_ANOM_MSG 1700
#define AUDIT_LAST_KERN_ANOM_MSG 1799
#define AUDIT_ANOM_PROMISCUOUS 1700 /* Device changed promiscuous mode */
#define AUDIT_KERNEL 2000 /* Asynchronous audit record. NOT A REQUEST. */
/* Rule flags */
#define AUDIT_FILTER_USER 0x00 /* Apply rule to user-generated messages */
#define AUDIT_FILTER_TASK 0x01 /* Apply rule at task creation (not syscall) */
#define AUDIT_FILTER_ENTRY 0x02 /* Apply rule at syscall entry */
#define AUDIT_FILTER_WATCH 0x03 /* Apply rule to file system watches */
#define AUDIT_FILTER_EXIT 0x04 /* Apply rule at syscall exit */
#define AUDIT_FILTER_TYPE 0x05 /* Apply rule at audit_log_start */
#define AUDIT_NR_FILTERS 6
#define AUDIT_FILTER_PREPEND 0x10 /* Prepend to front of list */
/* Rule actions */
#define AUDIT_NEVER 0 /* Do not build context if rule matches */
#define AUDIT_POSSIBLE 1 /* Build context if rule matches */
#define AUDIT_ALWAYS 2 /* Generate audit record if rule matches */
/* Rule structure sizes -- if these change, different AUDIT_ADD and
* AUDIT_LIST commands must be implemented. */
#define AUDIT_MAX_FIELDS 64
#define AUDIT_BITMASK_SIZE 64
#define AUDIT_WORD(nr) ((__u32)((nr)/32))
#define AUDIT_BIT(nr) (1 << ((nr) - AUDIT_WORD(nr)*32))
/* This bitmask is used to validate user input. It represents all bits that
* are currently used in an audit field constant understood by the kernel.
* If you are adding a new #define AUDIT_<whatever>, please ensure that
* AUDIT_UNUSED_BITS is updated if need be. */
#define AUDIT_UNUSED_BITS 0x0FFFFC00
/* Rule fields */
/* These are useful when checking the
* task structure at task creation time
* (AUDIT_PER_TASK). */
#define AUDIT_PID 0
#define AUDIT_UID 1
#define AUDIT_EUID 2
#define AUDIT_SUID 3
#define AUDIT_FSUID 4
#define AUDIT_GID 5
#define AUDIT_EGID 6
#define AUDIT_SGID 7
#define AUDIT_FSGID 8
#define AUDIT_LOGINUID 9
#define AUDIT_PERS 10
#define AUDIT_ARCH 11
#define AUDIT_MSGTYPE 12
/* These are ONLY useful when checking
* at syscall exit time (AUDIT_AT_EXIT). */
#define AUDIT_DEVMAJOR 100
#define AUDIT_DEVMINOR 101
#define AUDIT_INODE 102
#define AUDIT_EXIT 103
#define AUDIT_SUCCESS 104 /* exit >= 0; value ignored */
#define AUDIT_ARG0 200
#define AUDIT_ARG1 (AUDIT_ARG0+1)
#define AUDIT_ARG2 (AUDIT_ARG0+2)
#define AUDIT_ARG3 (AUDIT_ARG0+3)
#define AUDIT_NEGATE 0x80000000
/* These are the supported operators.
* 4 2 1
* = > <
* -------
* 0 0 0 0 nonsense
* 0 0 1 1 <
* 0 1 0 2 >
* 0 1 1 3 !=
* 1 0 0 4 =
* 1 0 1 5 <=
* 1 1 0 6 >=
* 1 1 1 7 all operators
*/
#define AUDIT_LESS_THAN 0x10000000
#define AUDIT_GREATER_THAN 0x20000000
#define AUDIT_NOT_EQUAL 0x30000000
#define AUDIT_EQUAL 0x40000000
#define AUDIT_LESS_THAN_OR_EQUAL (AUDIT_LESS_THAN|AUDIT_EQUAL)
#define AUDIT_GREATER_THAN_OR_EQUAL (AUDIT_GREATER_THAN|AUDIT_EQUAL)
#define AUDIT_OPERATORS (AUDIT_EQUAL|AUDIT_NOT_EQUAL)
/* Status symbols */
/* Mask values */
#define AUDIT_STATUS_ENABLED 0x0001
#define AUDIT_STATUS_FAILURE 0x0002
#define AUDIT_STATUS_PID 0x0004
#define AUDIT_STATUS_RATE_LIMIT 0x0008
#define AUDIT_STATUS_BACKLOG_LIMIT 0x0010
/* Failure-to-log actions */
#define AUDIT_FAIL_SILENT 0
#define AUDIT_FAIL_PRINTK 1
#define AUDIT_FAIL_PANIC 2
/* distinguish syscall tables */
#define __AUDIT_ARCH_64BIT 0x80000000
#define __AUDIT_ARCH_LE 0x40000000
#define AUDIT_ARCH_ALPHA (EM_ALPHA|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_ARM (EM_ARM|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_ARMEB (EM_ARM)
#define AUDIT_ARCH_CRIS (EM_CRIS|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_FRV (EM_FRV)
#define AUDIT_ARCH_H8300 (EM_H8_300)
#define AUDIT_ARCH_I386 (EM_386|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_IA64 (EM_IA_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_M32R (EM_M32R)
#define AUDIT_ARCH_M68K (EM_68K)
#define AUDIT_ARCH_MIPS (EM_MIPS)
#define AUDIT_ARCH_MIPSEL (EM_MIPS|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_MIPS64 (EM_MIPS|__AUDIT_ARCH_64BIT)
#define AUDIT_ARCH_MIPSEL64 (EM_MIPS|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_PARISC (EM_PARISC)
#define AUDIT_ARCH_PARISC64 (EM_PARISC|__AUDIT_ARCH_64BIT)
#define AUDIT_ARCH_PPC (EM_PPC)
#define AUDIT_ARCH_PPC64 (EM_PPC64|__AUDIT_ARCH_64BIT)
#define AUDIT_ARCH_S390 (EM_S390)
#define AUDIT_ARCH_S390X (EM_S390|__AUDIT_ARCH_64BIT)
#define AUDIT_ARCH_SH (EM_SH)
#define AUDIT_ARCH_SHEL (EM_SH|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_SH64 (EM_SH|__AUDIT_ARCH_64BIT)
#define AUDIT_ARCH_SHEL64 (EM_SH|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_SPARC (EM_SPARC)
#define AUDIT_ARCH_SPARC64 (EM_SPARCV9|__AUDIT_ARCH_64BIT)
#define AUDIT_ARCH_V850 (EM_V850|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_X86_64 (EM_X86_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
struct audit_status {
__u32 mask; /* Bit mask for valid entries */
__u32 enabled; /* 1 = enabled, 0 = disabled */
__u32 failure; /* Failure-to-log action */
__u32 pid; /* pid of auditd process */
__u32 rate_limit; /* messages rate limit (per second) */
__u32 backlog_limit; /* waiting messages limit */
__u32 lost; /* messages lost */
__u32 backlog; /* messages waiting in queue */
};
/* audit_rule_data supports filter rules with both integer and string
* fields. It corresponds with AUDIT_ADD_RULE, AUDIT_DEL_RULE and
* AUDIT_LIST_RULES requests.
*/
struct audit_rule_data {
__u32 flags; /* AUDIT_PER_{TASK,CALL}, AUDIT_PREPEND */
__u32 action; /* AUDIT_NEVER, AUDIT_POSSIBLE, AUDIT_ALWAYS */
__u32 field_count;
__u32 mask[AUDIT_BITMASK_SIZE]; /* syscall(s) affected */
__u32 fields[AUDIT_MAX_FIELDS];
__u32 values[AUDIT_MAX_FIELDS];
__u32 fieldflags[AUDIT_MAX_FIELDS];
__u32 buflen; /* total length of string fields */
char buf[0]; /* string fields buffer */
};
/* audit_rule is supported to maintain backward compatibility with
* userspace. It supports integer fields only and corresponds to
* AUDIT_ADD, AUDIT_DEL and AUDIT_LIST requests.
*/
struct audit_rule { /* for AUDIT_LIST, AUDIT_ADD, and AUDIT_DEL */
__u32 flags; /* AUDIT_PER_{TASK,CALL}, AUDIT_PREPEND */
__u32 action; /* AUDIT_NEVER, AUDIT_POSSIBLE, AUDIT_ALWAYS */
__u32 field_count;
__u32 mask[AUDIT_BITMASK_SIZE];
__u32 fields[AUDIT_MAX_FIELDS];
__u32 values[AUDIT_MAX_FIELDS];
};
#ifdef __KERNEL__
struct audit_sig_info {
uid_t uid;
pid_t pid;
};
struct audit_buffer;
struct audit_context;
struct inode;
struct netlink_skb_parms;
#define AUDITSC_INVALID 0
#define AUDITSC_SUCCESS 1
#define AUDITSC_FAILURE 2
#define AUDITSC_RESULT(x) ( ((long)(x))<0?AUDITSC_FAILURE:AUDITSC_SUCCESS )
#ifdef CONFIG_AUDITSYSCALL
/* These are defined in auditsc.c */
/* Public API */
extern int audit_alloc(struct task_struct *task);
extern void audit_free(struct task_struct *task);
extern void audit_syscall_entry(struct task_struct *task, int arch,
int major, unsigned long a0, unsigned long a1,
unsigned long a2, unsigned long a3);
extern void audit_syscall_exit(struct task_struct *task, int failed, long return_code);
extern void audit_getname(const char *name);
extern void audit_putname(const char *name);
extern void __audit_inode(const char *name, const struct inode *inode, unsigned flags);
extern void __audit_inode_child(const char *dname, const struct inode *inode,
unsigned long pino);
static inline void audit_inode(const char *name, const struct inode *inode,
unsigned flags) {
if (unlikely(current->audit_context))
__audit_inode(name, inode, flags);
}
static inline void audit_inode_child(const char *dname,
const struct inode *inode,
unsigned long pino) {
if (unlikely(current->audit_context))
__audit_inode_child(dname, inode, pino);
}
/* Private API (for audit.c only) */
extern unsigned int audit_serial(void);
extern void auditsc_get_stamp(struct audit_context *ctx,
struct timespec *t, unsigned int *serial);
extern int audit_set_loginuid(struct task_struct *task, uid_t loginuid);
extern uid_t audit_get_loginuid(struct audit_context *ctx);
extern int audit_ipc_perms(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode, struct kern_ipc_perm *ipcp);
extern int audit_socketcall(int nargs, unsigned long *args);
extern int audit_sockaddr(int len, void *addr);
extern int audit_avc_path(struct dentry *dentry, struct vfsmount *mnt);
extern void audit_signal_info(int sig, struct task_struct *t);
extern int audit_set_macxattr(const char *name);
#else
#define audit_alloc(t) ({ 0; })
#define audit_free(t) do { ; } while (0)
#define audit_syscall_entry(t,ta,a,b,c,d,e) do { ; } while (0)
#define audit_syscall_exit(t,f,r) do { ; } while (0)
#define audit_getname(n) do { ; } while (0)
#define audit_putname(n) do { ; } while (0)
#define __audit_inode(n,i,f) do { ; } while (0)
#define __audit_inode_child(d,i,p) do { ; } while (0)
#define audit_inode(n,i,f) do { ; } while (0)
#define audit_inode_child(d,i,p) do { ; } while (0)
#define auditsc_get_stamp(c,t,s) do { BUG(); } while (0)
#define audit_get_loginuid(c) ({ -1; })
#define audit_ipc_perms(q,u,g,m,i) ({ 0; })
#define audit_socketcall(n,a) ({ 0; })
#define audit_sockaddr(len, addr) ({ 0; })
#define audit_avc_path(dentry, mnt) ({ 0; })
#define audit_signal_info(s,t) do { ; } while (0)
#define audit_set_macxattr(n) do { ; } while (0)
#endif
#ifdef CONFIG_AUDIT
/* These are defined in audit.c */
/* Public API */
extern void audit_log(struct audit_context *ctx, gfp_t gfp_mask,
int type, const char *fmt, ...)
__attribute__((format(printf,4,5)));
extern struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type);
extern void audit_log_format(struct audit_buffer *ab,
const char *fmt, ...)
__attribute__((format(printf,2,3)));
extern void audit_log_end(struct audit_buffer *ab);
extern void audit_log_hex(struct audit_buffer *ab,
const unsigned char *buf,
size_t len);
extern void audit_log_untrustedstring(struct audit_buffer *ab,
const char *string);
extern void audit_log_d_path(struct audit_buffer *ab,
const char *prefix,
struct dentry *dentry,
struct vfsmount *vfsmnt);
/* Private API (for audit.c only) */
extern int audit_filter_user(struct netlink_skb_parms *cb, int type);
extern int audit_filter_type(int type);
extern int audit_receive_filter(int type, int pid, int uid, int seq,
void *data, size_t datasz, uid_t loginuid);
#else
#define audit_log(c,g,t,f,...) do { ; } while (0)
#define audit_log_start(c,g,t) ({ NULL; })
#define audit_log_vformat(b,f,a) do { ; } while (0)
#define audit_log_format(b,f,...) do { ; } while (0)
#define audit_log_end(b) do { ; } while (0)
#define audit_log_hex(a,b,l) do { ; } while (0)
#define audit_log_untrustedstring(a,s) do { ; } while (0)
#define audit_log_d_path(b,p,d,v) do { ; } while (0)
#define audit_panic(m) do { ; } while (0)
#endif
#endif
#endif
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