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Merge git://git.infradead.org/users/eparis/audit

Browse source 
Pull audit update from Eric Paris:
 "Again we stayed pretty well contained inside the audit system.
  Venturing out was fixing a couple of function prototypes which were
  inconsistent (didn't hurt anything, but we used the same value as an
  int, uint, u32, and I think even a long in a couple of places).

  We also made a couple of minor changes to when a couple of LSMs called
  the audit system.  We hoped to add aarch64 audit support this go
  round, but it wasn't ready.

  I'm disappearing on vacation on Thursday.  I should have internet
  access, but it'll be spotty.  If anything goes wrong please be sure to
  cc rgb@redhat.com.  He'll make fixing things his top priority"

* git://git.infradead.org/users/eparis/audit: (50 commits)
  audit: whitespace fix in kernel-parameters.txt
  audit: fix location of __net_initdata for audit_net_ops
  audit: remove pr_info for every network namespace
  audit: Modify a set of system calls in audit class definitions
  audit: Convert int limit uses to u32
  audit: Use more current logging style
  audit: Use hex_byte_pack_upper
  audit: correct a type mismatch in audit_syscall_exit()
  audit: reorder AUDIT_TTY_SET arguments
  audit: rework AUDIT_TTY_SET to only grab spin_lock once
  audit: remove needless switch in AUDIT_SET
  audit: use define's for audit version
  audit: documentation of audit= kernel parameter
  audit: wait_for_auditd rework for readability
  audit: update MAINTAINERS
  audit: log task info on feature change
  audit: fix incorrect set of audit_sock
  audit: print error message when fail to create audit socket
  audit: fix dangling keywords in audit_log_set_loginuid() output
  audit: log on errors from filter user rules
  ...
This commit is contained in:
Linus Torvalds 2014-01-23 18:08:10 -08:00
commit 6dd9158ae8
20 changed files with 405 additions and 244 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
Documentation/kernel-parameters.txt
View file

@ -463,6 +463,22 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
atkbd.softrepeat= [HW]
Use software keyboard repeat
audit= [KNL] Enable the audit sub-system
Format: { "0" | "1" } (0 = disabled, 1 = enabled)
0 - kernel audit is disabled and can not be enabled
until the next reboot
unset - kernel audit is initialized but disabled and
will be fully enabled by the userspace auditd.
1 - kernel audit is initialized and partially enabled,
storing at most audit_backlog_limit messages in
RAM until it is fully enabled by the userspace
auditd.
Default: unset
audit_backlog_limit= [KNL] Set the audit queue size limit.
Format: <int> (must be >=0)
Default: 64
baycom_epp= [HW,AX25]
Format: <io>,<mode>

3
MAINTAINERS
View file

@ -1597,11 +1597,10 @@ S: Supported
F: drivers/scsi/esas2r
AUDIT SUBSYSTEM
M: Al Viro <viro@zeniv.linux.org.uk>
M: Eric Paris <eparis@redhat.com>
L: linux-audit@redhat.com (subscribers-only)
W: http://people.redhat.com/sgrubb/audit/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current.git
T: git git://git.infradead.org/users/eparis/audit.git
S: Maintained
F: include/linux/audit.h
F: include/uapi/linux/audit.h

2
drivers/tty/tty_audit.c
View file

@ -67,7 +67,7 @@ static void tty_audit_log(const char *description, int major, int minor,
struct task_struct *tsk = current;
uid_t uid = from_kuid(&init_user_ns, task_uid(tsk));
uid_t loginuid = from_kuid(&init_user_ns, audit_get_loginuid(tsk));
u32 sessionid = audit_get_sessionid(tsk);
unsigned int sessionid = audit_get_sessionid(tsk);
ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_TTY);
if (ab) {

4
include/asm-generic/audit_change_attr.h
View file

@ -4,9 +4,11 @@ __NR_chmod,
__NR_fchmod,
#ifdef __NR_chown
__NR_chown,
__NR_fchown,
__NR_lchown,
#endif
#ifdef __NR_fchown
__NR_fchown,
#endif
__NR_setxattr,
__NR_lsetxattr,
__NR_fsetxattr,

6
include/asm-generic/audit_write.h
View file

@ -10,6 +10,12 @@ __NR_truncate,
#ifdef __NR_truncate64
__NR_truncate64,
#endif
#ifdef __NR_ftruncate
__NR_ftruncate,
#endif
#ifdef __NR_ftruncate64
__NR_ftruncate64,
#endif
#ifdef __NR_bind
__NR_bind, /* bind can affect fs object only in one way... */
#endif

22
include/linux/audit.h
View file

@ -137,7 +137,7 @@ static inline void audit_syscall_exit(void *pt_regs)
{
if (unlikely(current->audit_context)) {
int success = is_syscall_success(pt_regs);
int return_code = regs_return_value(pt_regs);
long return_code = regs_return_value(pt_regs);
__audit_syscall_exit(success, return_code);
}
@ -202,7 +202,7 @@ static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
return tsk->loginuid;
}
static inline int audit_get_sessionid(struct task_struct *tsk)
static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
{
return tsk->sessionid;
}
@ -220,7 +220,7 @@ extern void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat);
extern int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
const struct cred *new,
const struct cred *old);
extern void __audit_log_capset(pid_t pid, const struct cred *new, const struct cred *old);
extern void __audit_log_capset(const struct cred *new, const struct cred *old);
extern void __audit_mmap_fd(int fd, int flags);
static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
@ -285,11 +285,11 @@ static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
return 0;
}
static inline void audit_log_capset(pid_t pid, const struct cred *new,
static inline void audit_log_capset(const struct cred *new,
const struct cred *old)
{
if (unlikely(!audit_dummy_context()))
__audit_log_capset(pid, new, old);
__audit_log_capset(new, old);
}
static inline void audit_mmap_fd(int fd, int flags)
@ -359,7 +359,7 @@ static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
{
return INVALID_UID;
}
static inline int audit_get_sessionid(struct task_struct *tsk)
static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
{
return -1;
}
@ -397,8 +397,8 @@ static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
{
return 0;
}
static inline void audit_log_capset(pid_t pid, const struct cred *new,
const struct cred *old)
static inline void audit_log_capset(const struct cred *new,
const struct cred *old)
{ }
static inline void audit_mmap_fd(int fd, int flags)
{ }
@ -461,9 +461,11 @@ extern int audit_update_lsm_rules(void);
/* Private API (for audit.c only) */
extern int audit_filter_user(int type);
extern int audit_filter_type(int type);
extern int audit_receive_filter(int type, int pid, int seq,
extern int audit_rule_change(int type, __u32 portid, int seq,
void *data, size_t datasz);
extern int audit_enabled;
extern int audit_list_rules_send(__u32 portid, int seq);
extern u32 audit_enabled;
#else /* CONFIG_AUDIT */
static inline __printf(4, 5)
void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,

2
include/linux/init_task.h
View file

@ -97,7 +97,7 @@ extern struct group_info init_groups;
#ifdef CONFIG_AUDITSYSCALL
#define INIT_IDS \
.loginuid = INVALID_UID, \
.sessionid = -1,
.sessionid = (unsigned int)-1,
#else
#define INIT_IDS
#endif

2
include/net/netlabel.h
View file

@ -111,7 +111,7 @@ struct cipso_v4_doi;
struct netlbl_audit {
u32 secid;
kuid_t loginuid;
u32 sessionid;
unsigned int sessionid;
};
/*

20
include/net/xfrm.h
View file

@ -681,7 +681,7 @@ struct xfrm_spi_skb_cb {
struct xfrm_audit {
u32 secid;
kuid_t loginuid;
u32 sessionid;
unsigned int sessionid;
};
#ifdef CONFIG_AUDITSYSCALL
@ -699,7 +699,7 @@ static inline struct audit_buffer *xfrm_audit_start(const char *op)
return audit_buf;
}
static inline void xfrm_audit_helper_usrinfo(kuid_t auid, u32 ses, u32 secid,
static inline void xfrm_audit_helper_usrinfo(kuid_t auid, unsigned int ses, u32 secid,
struct audit_buffer *audit_buf)
{
char *secctx;
@ -716,13 +716,13 @@ static inline void xfrm_audit_helper_usrinfo(kuid_t auid, u32 ses, u32 secid,
}
void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, kuid_t auid,
u32 ses, u32 secid);
unsigned int ses, u32 secid);
void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, kuid_t auid,
u32 ses, u32 secid);
unsigned int ses, u32 secid);
void xfrm_audit_state_add(struct xfrm_state *x, int result, kuid_t auid,
u32 ses, u32 secid);
unsigned int ses, u32 secid);
void xfrm_audit_state_delete(struct xfrm_state *x, int result, kuid_t auid,
u32 ses, u32 secid);
unsigned int ses, u32 secid);
void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
struct sk_buff *skb);
void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
@ -735,22 +735,22 @@ void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
#else
static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
kuid_t auid, u32 ses, u32 secid)
kuid_t auid, unsigned int ses, u32 secid)
{
}
static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
kuid_t auid, u32 ses, u32 secid)
kuid_t auid, unsigned int ses, u32 secid)
{
}
static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
kuid_t auid, u32 ses, u32 secid)
kuid_t auid, unsigned int ses, u32 secid)
{
}
static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
kuid_t auid, u32 ses, u32 secid)
kuid_t auid, unsigned int ses, u32 secid)
{
}

8
include/uapi/linux/audit.h
View file

@ -319,6 +319,12 @@ enum {
#define AUDIT_STATUS_PID 0x0004
#define AUDIT_STATUS_RATE_LIMIT 0x0008
#define AUDIT_STATUS_BACKLOG_LIMIT 0x0010
#define AUDIT_STATUS_BACKLOG_WAIT_TIME 0x0020
#define AUDIT_VERSION_BACKLOG_LIMIT 1
#define AUDIT_VERSION_BACKLOG_WAIT_TIME 2
#define AUDIT_VERSION_LATEST AUDIT_VERSION_BACKLOG_WAIT_TIME
/* Failure-to-log actions */
#define AUDIT_FAIL_SILENT 0
#define AUDIT_FAIL_PRINTK 1
@ -375,6 +381,8 @@ struct audit_status {
__u32 backlog_limit; /* waiting messages limit */
__u32 lost; /* messages lost */
__u32 backlog; /* messages waiting in queue */
__u32 version; /* audit api version number */
__u32 backlog_wait_time;/* message queue wait timeout */
};
struct audit_features {

367
kernel/audit.c
View file

@ -41,6 +41,8 @@
* Example user-space utilities: http://people.redhat.com/sgrubb/audit/
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/init.h>
#include <asm/types.h>
#include <linux/atomic.h>
@ -63,6 +65,7 @@
#include <linux/freezer.h>
#include <linux/tty.h>
#include <linux/pid_namespace.h>
#include <net/netns/generic.h>
#include "audit.h"
@ -76,16 +79,16 @@ static int audit_initialized;
#define AUDIT_OFF 0
#define AUDIT_ON 1
#define AUDIT_LOCKED 2
int audit_enabled;
int audit_ever_enabled;
u32 audit_enabled;
u32 audit_ever_enabled;
EXPORT_SYMBOL_GPL(audit_enabled);
/* Default state when kernel boots without any parameters. */
static int audit_default;
static u32 audit_default;
/* If auditing cannot proceed, audit_failure selects what happens. */
static int audit_failure = AUDIT_FAIL_PRINTK;
static u32 audit_failure = AUDIT_FAIL_PRINTK;
/*
* If audit records are to be written to the netlink socket, audit_pid
@ -93,17 +96,19 @@ static int audit_failure = AUDIT_FAIL_PRINTK;
* the portid to use to send netlink messages to that process.
*/
int audit_pid;
static int audit_nlk_portid;
static __u32 audit_nlk_portid;
/* If audit_rate_limit is non-zero, limit the rate of sending audit records
* to that number per second. This prevents DoS attacks, but results in
* audit records being dropped. */
static int audit_rate_limit;
static u32 audit_rate_limit;
/* Number of outstanding audit_buffers allowed. */
static int audit_backlog_limit = 64;
static int audit_backlog_wait_time = 60 * HZ;
static int audit_backlog_wait_overflow = 0;
/* Number of outstanding audit_buffers allowed.
* When set to zero, this means unlimited. */
static u32 audit_backlog_limit = 64;
#define AUDIT_BACKLOG_WAIT_TIME (60 * HZ)
static u32 audit_backlog_wait_time = AUDIT_BACKLOG_WAIT_TIME;
static u32 audit_backlog_wait_overflow = 0;
/* The identity of the user shutting down the audit system. */
kuid_t audit_sig_uid = INVALID_UID;
@ -121,6 +126,7 @@ static atomic_t audit_lost = ATOMIC_INIT(0);
/* The netlink socket. */
static struct sock *audit_sock;
int audit_net_id;
/* Hash for inode-based rules */
struct list_head audit_inode_hash[AUDIT_INODE_BUCKETS];
@ -175,27 +181,27 @@ struct audit_buffer {
};
struct audit_reply {
int pid;
__u32 portid;
pid_t pid;
struct sk_buff *skb;
};
static void audit_set_pid(struct audit_buffer *ab, pid_t pid)
static void audit_set_portid(struct audit_buffer *ab, __u32 portid)
{
if (ab) {
struct nlmsghdr *nlh = nlmsg_hdr(ab->skb);
nlh->nlmsg_pid = pid;
nlh->nlmsg_pid = portid;
}
}
void audit_panic(const char *message)
{
switch (audit_failure)
{
switch (audit_failure) {
case AUDIT_FAIL_SILENT:
break;
case AUDIT_FAIL_PRINTK:
if (printk_ratelimit())
printk(KERN_ERR "audit: %s\n", message);
pr_err("%s\n", message);
break;
case AUDIT_FAIL_PANIC:
/* test audit_pid since printk is always losey, why bother? */
@ -266,9 +272,7 @@ void audit_log_lost(const char *message)
if (print) {
if (printk_ratelimit())
printk(KERN_WARNING
"audit: audit_lost=%d audit_rate_limit=%d "
"audit_backlog_limit=%d\n",
pr_warn("audit_lost=%u audit_rate_limit=%u audit_backlog_limit=%u\n",
atomic_read(&audit_lost),
audit_rate_limit,
audit_backlog_limit);
@ -276,7 +280,7 @@ void audit_log_lost(const char *message)
}
}
static int audit_log_config_change(char *function_name, int new, int old,
static int audit_log_config_change(char *function_name, u32 new, u32 old,
int allow_changes)
{
struct audit_buffer *ab;
@ -285,7 +289,7 @@ static int audit_log_config_change(char *function_name, int new, int old,
ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE);
if (unlikely(!ab))
return rc;
audit_log_format(ab, "%s=%d old=%d", function_name, new, old);
audit_log_format(ab, "%s=%u old=%u", function_name, new, old);
audit_log_session_info(ab);
rc = audit_log_task_context(ab);
if (rc)
@ -295,9 +299,10 @@ static int audit_log_config_change(char *function_name, int new, int old,
return rc;
}
static int audit_do_config_change(char *function_name, int *to_change, int new)
static int audit_do_config_change(char *function_name, u32 *to_change, u32 new)
{
int allow_changes, rc = 0, old = *to_change;
int allow_changes, rc = 0;
u32 old = *to_change;
/* check if we are locked */
if (audit_enabled == AUDIT_LOCKED)
@ -320,17 +325,23 @@ static int audit_do_config_change(char *function_name, int *to_change, int new)
return rc;
}
static int audit_set_rate_limit(int limit)
static int audit_set_rate_limit(u32 limit)
{
return audit_do_config_change("audit_rate_limit", &audit_rate_limit, limit);
}
static int audit_set_backlog_limit(int limit)
static int audit_set_backlog_limit(u32 limit)
{
return audit_do_config_change("audit_backlog_limit", &audit_backlog_limit, limit);
}
static int audit_set_enabled(int state)
static int audit_set_backlog_wait_time(u32 timeout)
{
return audit_do_config_change("audit_backlog_wait_time",
&audit_backlog_wait_time, timeout);
}
static int audit_set_enabled(u32 state)
{
int rc;
if (state < AUDIT_OFF || state > AUDIT_LOCKED)
@ -343,7 +354,7 @@ static int audit_set_enabled(int state)
return rc;
}
static int audit_set_failure(int state)
static int audit_set_failure(u32 state)
{
if (state != AUDIT_FAIL_SILENT
&& state != AUDIT_FAIL_PRINTK
@ -365,7 +376,8 @@ static int audit_set_failure(int state)
static void audit_hold_skb(struct sk_buff *skb)
{
if (audit_default &&
skb_queue_len(&audit_skb_hold_queue) < audit_backlog_limit)
(!audit_backlog_limit ||
skb_queue_len(&audit_skb_hold_queue) < audit_backlog_limit))
skb_queue_tail(&audit_skb_hold_queue, skb);
else
kfree_skb(skb);
@ -382,7 +394,7 @@ static void audit_printk_skb(struct sk_buff *skb)
if (nlh->nlmsg_type != AUDIT_EOE) {
if (printk_ratelimit())
printk(KERN_NOTICE "type=%d %s\n", nlh->nlmsg_type, data);
pr_notice("type=%d %s\n", nlh->nlmsg_type, data);
else
audit_log_lost("printk limit exceeded\n");
}
@ -398,9 +410,12 @@ static void kauditd_send_skb(struct sk_buff *skb)
err = netlink_unicast(audit_sock, skb, audit_nlk_portid, 0);
if (err < 0) {
BUG_ON(err != -ECONNREFUSED); /* Shouldn't happen */
printk(KERN_ERR "audit: *NO* daemon at audit_pid=%d\n", audit_pid);
audit_log_lost("auditd disappeared\n");
audit_pid = 0;
if (audit_pid) {
pr_err("*NO* daemon at audit_pid=%d\n", audit_pid);
audit_log_lost("auditd disappeared\n");
audit_pid = 0;
audit_sock = NULL;
}
/* we might get lucky and get this in the next auditd */
audit_hold_skb(skb);
} else
@ -457,8 +472,10 @@ static int kauditd_thread(void *dummy)
flush_hold_queue();
skb = skb_dequeue(&audit_skb_queue);
wake_up(&audit_backlog_wait);
if (skb) {
if (skb_queue_len(&audit_skb_queue) <= audit_backlog_limit)
wake_up(&audit_backlog_wait);
if (audit_pid)
kauditd_send_skb(skb);
else
@ -482,22 +499,23 @@ static int kauditd_thread(void *dummy)
int audit_send_list(void *_dest)
{
struct audit_netlink_list *dest = _dest;
int pid = dest->pid;
struct sk_buff *skb;
struct net *net = get_net_ns_by_pid(dest->pid);
struct audit_net *aunet = net_generic(net, audit_net_id);
/* wait for parent to finish and send an ACK */
mutex_lock(&audit_cmd_mutex);
mutex_unlock(&audit_cmd_mutex);
while ((skb = __skb_dequeue(&dest->q)) != NULL)
netlink_unicast(audit_sock, skb, pid, 0);
netlink_unicast(aunet->nlsk, skb, dest->portid, 0);
kfree(dest);
return 0;
}
struct sk_buff *audit_make_reply(int pid, int seq, int type, int done,
struct sk_buff *audit_make_reply(__u32 portid, int seq, int type, int done,
int multi, const void *payload, int size)
{
struct sk_buff *skb;
@ -510,7 +528,7 @@ struct sk_buff *audit_make_reply(int pid, int seq, int type, int done,
if (!skb)
return NULL;
nlh = nlmsg_put(skb, pid, seq, t, size, flags);
nlh = nlmsg_put(skb, portid, seq, t, size, flags);
if (!nlh)
goto out_kfree_skb;
data = nlmsg_data(nlh);
@ -525,19 +543,21 @@ struct sk_buff *audit_make_reply(int pid, int seq, int type, int done,
static int audit_send_reply_thread(void *arg)
{
struct audit_reply *reply = (struct audit_reply *)arg;
struct net *net = get_net_ns_by_pid(reply->pid);
struct audit_net *aunet = net_generic(net, audit_net_id);
mutex_lock(&audit_cmd_mutex);
mutex_unlock(&audit_cmd_mutex);
/* Ignore failure. It'll only happen if the sender goes away,
because our timeout is set to infinite. */
netlink_unicast(audit_sock, reply->skb, reply->pid, 0);
netlink_unicast(aunet->nlsk , reply->skb, reply->portid, 0);
kfree(reply);
return 0;
}
/**
* audit_send_reply - send an audit reply message via netlink
* @pid: process id to send reply to
* @portid: netlink port to which to send reply
* @seq: sequence number
* @type: audit message type
* @done: done (last) flag
@ -545,11 +565,11 @@ static int audit_send_reply_thread(void *arg)
* @payload: payload data
* @size: payload size
*
* Allocates an skb, builds the netlink message, and sends it to the pid.
* Allocates an skb, builds the netlink message, and sends it to the port id.
* No failure notifications.
*/
static void audit_send_reply(int pid, int seq, int type, int done, int multi,
const void *payload, int size)
static void audit_send_reply(__u32 portid, int seq, int type, int done,
int multi, const void *payload, int size)
{
struct sk_buff *skb;
struct task_struct *tsk;
@ -559,11 +579,12 @@ static void audit_send_reply(int pid, int seq, int type, int done, int multi,
if (!reply)
return;
skb = audit_make_reply(pid, seq, type, done, multi, payload, size);
skb = audit_make_reply(portid, seq, type, done, multi, payload, size);
if (!skb)
goto out;
reply->pid = pid;
reply->portid = portid;
reply->pid = task_pid_vnr(current);
reply->skb = skb;
tsk = kthread_run(audit_send_reply_thread, reply, "audit_send_reply");
@ -663,8 +684,12 @@ static void audit_log_feature_change(int which, u32 old_feature, u32 new_feature
{
struct audit_buffer *ab;
if (audit_enabled == AUDIT_OFF)
return;
ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_FEATURE_CHANGE);
audit_log_format(ab, "feature=%s new=%d old=%d old_lock=%d new_lock=%d res=%d",
audit_log_task_info(ab, current);
audit_log_format(ab, "feature=%s old=%u new=%u old_lock=%u new_lock=%u res=%d",
audit_feature_names[which], !!old_feature, !!new_feature,
!!old_lock, !!new_lock, res);
audit_log_end(ab);
@ -694,7 +719,7 @@ static int audit_set_feature(struct sk_buff *skb)
old_lock = af.lock & feature;
/* are we changing a locked feature? */
if ((af.lock & feature) && (new_feature != old_feature)) {
if (old_lock && (new_feature != old_feature)) {
audit_log_feature_change(i, old_feature, new_feature,
old_lock, new_lock, 0);
return -EPERM;
@ -732,7 +757,6 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
{
u32 seq;
void *data;
struct audit_status *status_get, status_set;
int err;
struct audit_buffer *ab;
u16 msg_type = nlh->nlmsg_type;
@ -758,48 +782,70 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
data = nlmsg_data(nlh);
switch (msg_type) {
case AUDIT_GET:
memset(&status_set, 0, sizeof(status_set));
status_set.enabled = audit_enabled;
status_set.failure = audit_failure;
status_set.pid = audit_pid;
status_set.rate_limit = audit_rate_limit;
status_set.backlog_limit = audit_backlog_limit;
status_set.lost = atomic_read(&audit_lost);
status_set.backlog = skb_queue_len(&audit_skb_queue);
case AUDIT_GET: {
struct audit_status s;
memset(&s, 0, sizeof(s));
s.enabled = audit_enabled;
s.failure = audit_failure;
s.pid = audit_pid;
s.rate_limit = audit_rate_limit;
s.backlog_limit = audit_backlog_limit;
s.lost = atomic_read(&audit_lost);
s.backlog = skb_queue_len(&audit_skb_queue);
s.version = AUDIT_VERSION_LATEST;
s.backlog_wait_time = audit_backlog_wait_time;
audit_send_reply(NETLINK_CB(skb).portid, seq, AUDIT_GET, 0, 0,
&status_set, sizeof(status_set));
&s, sizeof(s));
break;
case AUDIT_SET:
if (nlmsg_len(nlh) < sizeof(struct audit_status))
return -EINVAL;
status_get = (struct audit_status *)data;
if (status_get->mask & AUDIT_STATUS_ENABLED) {
err = audit_set_enabled(status_get->enabled);
}
case AUDIT_SET: {
struct audit_status s;
memset(&s, 0, sizeof(s));
/* guard against past and future API changes */
memcpy(&s, data, min_t(size_t, sizeof(s), nlmsg_len(nlh)));
if (s.mask & AUDIT_STATUS_ENABLED) {
err = audit_set_enabled(s.enabled);
if (err < 0)
return err;
}
if (status_get->mask & AUDIT_STATUS_FAILURE) {
err = audit_set_failure(status_get->failure);
if (s.mask & AUDIT_STATUS_FAILURE) {
err = audit_set_failure(s.failure);
if (err < 0)
return err;
}
if (status_get->mask & AUDIT_STATUS_PID) {
int new_pid = status_get->pid;
if (s.mask & AUDIT_STATUS_PID) {
int new_pid = s.pid;
if ((!new_pid) && (task_tgid_vnr(current) != audit_pid))
return -EACCES;
if (audit_enabled != AUDIT_OFF)
audit_log_config_change("audit_pid", new_pid, audit_pid, 1);
audit_pid = new_pid;
audit_nlk_portid = NETLINK_CB(skb).portid;
audit_sock = skb->sk;
}
if (status_get->mask & AUDIT_STATUS_RATE_LIMIT) {
err = audit_set_rate_limit(status_get->rate_limit);
if (s.mask & AUDIT_STATUS_RATE_LIMIT) {
err = audit_set_rate_limit(s.rate_limit);
if (err < 0)
return err;
}
if (s.mask & AUDIT_STATUS_BACKLOG_LIMIT) {
err = audit_set_backlog_limit(s.backlog_limit);
if (err < 0)
return err;
}
if (s.mask & AUDIT_STATUS_BACKLOG_WAIT_TIME) {
if (sizeof(s) > (size_t)nlh->nlmsg_len)
return -EINVAL;
if (s.backlog_wait_time < 0 ||
s.backlog_wait_time > 10*AUDIT_BACKLOG_WAIT_TIME)
return -EINVAL;
err = audit_set_backlog_wait_time(s.backlog_wait_time);
if (err < 0)
return err;
}
if (status_get->mask & AUDIT_STATUS_BACKLOG_LIMIT)
err = audit_set_backlog_limit(status_get->backlog_limit);
break;
}
case AUDIT_GET_FEATURE:
err = audit_get_feature(skb);
if (err)
@ -817,13 +863,14 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
return 0;
err = audit_filter_user(msg_type);
if (err == 1) {
if (err == 1) { /* match or error */
err = 0;
if (msg_type == AUDIT_USER_TTY) {
err = tty_audit_push_current();
if (err)
break;
}
mutex_unlock(&audit_cmd_mutex);
audit_log_common_recv_msg(&ab, msg_type);
if (msg_type != AUDIT_USER_TTY)
audit_log_format(ab, " msg='%.*s'",
@ -839,8 +886,9 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
size--;
audit_log_n_untrustedstring(ab, data, size);
}
audit_set_pid(ab, NETLINK_CB(skb).portid);
audit_set_portid(ab, NETLINK_CB(skb).portid);
audit_log_end(ab);
mutex_lock(&audit_cmd_mutex);
}
break;
case AUDIT_ADD_RULE:
@ -853,11 +901,12 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
audit_log_end(ab);
return -EPERM;
}
/* fallthrough */
case AUDIT_LIST_RULES:
err = audit_receive_filter(msg_type, NETLINK_CB(skb).portid,
err = audit_rule_change(msg_type, NETLINK_CB(skb).portid,
seq, data, nlmsg_len(nlh));
break;
case AUDIT_LIST_RULES:
err = audit_list_rules_send(NETLINK_CB(skb).portid, seq);
break;
case AUDIT_TRIM:
audit_trim_trees();
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE);
@ -939,20 +988,33 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
break;
}
case AUDIT_TTY_SET: {
struct audit_tty_status s;
struct audit_tty_status s, old;
struct task_struct *tsk = current;
struct audit_buffer *ab;
memset(&s, 0, sizeof(s));
/* guard against past and future API changes */
memcpy(&s, data, min_t(size_t, sizeof(s), nlmsg_len(nlh)));
/* check if new data is valid */
if ((s.enabled != 0 && s.enabled != 1) ||
(s.log_passwd != 0 && s.log_passwd != 1))
return -EINVAL;
err = -EINVAL;
spin_lock(&tsk->sighand->siglock);
tsk->signal->audit_tty = s.enabled;
tsk->signal->audit_tty_log_passwd = s.log_passwd;
old.enabled = tsk->signal->audit_tty;
old.log_passwd = tsk->signal->audit_tty_log_passwd;
if (!err) {
tsk->signal->audit_tty = s.enabled;
tsk->signal->audit_tty_log_passwd = s.log_passwd;
}
spin_unlock(&tsk->sighand->siglock);
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE);
audit_log_format(ab, " op=tty_set old-enabled=%d new-enabled=%d"
" old-log_passwd=%d new-log_passwd=%d res=%d",
old.enabled, s.enabled, old.log_passwd,
s.log_passwd, !err);
audit_log_end(ab);
break;
}
default:
@ -998,24 +1060,55 @@ static void audit_receive(struct sk_buff *skb)
mutex_unlock(&audit_cmd_mutex);
}
/* Initialize audit support at boot time. */
static int __init audit_init(void)
static int __net_init audit_net_init(struct net *net)
{
int i;
struct netlink_kernel_cfg cfg = {
.input = audit_receive,
};
struct audit_net *aunet = net_generic(net, audit_net_id);
aunet->nlsk = netlink_kernel_create(net, NETLINK_AUDIT, &cfg);
if (aunet->nlsk == NULL) {
audit_panic("cannot initialize netlink socket in namespace");
return -ENOMEM;
}
aunet->nlsk->sk_sndtimeo = MAX_SCHEDULE_TIMEOUT;
return 0;
}
static void __net_exit audit_net_exit(struct net *net)
{
struct audit_net *aunet = net_generic(net, audit_net_id);
struct sock *sock = aunet->nlsk;
if (sock == audit_sock) {
audit_pid = 0;
audit_sock = NULL;
}
rcu_assign_pointer(aunet->nlsk, NULL);
synchronize_net();
netlink_kernel_release(sock);
}
static struct pernet_operations audit_net_ops __net_initdata = {
.init = audit_net_init,
.exit = audit_net_exit,
.id = &audit_net_id,
.size = sizeof(struct audit_net),
};
/* Initialize audit support at boot time. */
static int __init audit_init(void)
{
int i;
if (audit_initialized == AUDIT_DISABLED)
return 0;
printk(KERN_INFO "audit: initializing netlink socket (%s)\n",
audit_default ? "enabled" : "disabled");
audit_sock = netlink_kernel_create(&init_net, NETLINK_AUDIT, &cfg);
if (!audit_sock)
audit_panic("cannot initialize netlink socket");
else
audit_sock->sk_sndtimeo = MAX_SCHEDULE_TIMEOUT;
pr_info("initializing netlink subsys (%s)\n",
audit_default ? "enabled" : "disabled");
register_pernet_subsys(&audit_net_ops);
skb_queue_head_init(&audit_skb_queue);
skb_queue_head_init(&audit_skb_hold_queue);
@ -1039,23 +1132,33 @@ static int __init audit_enable(char *str)
if (!audit_default)
audit_initialized = AUDIT_DISABLED;
printk(KERN_INFO "audit: %s", audit_default ? "enabled" : "disabled");
if (audit_initialized == AUDIT_INITIALIZED) {
audit_enabled = audit_default;
audit_ever_enabled |= !!audit_default;
} else if (audit_initialized == AUDIT_UNINITIALIZED) {
printk(" (after initialization)");
} else {
printk(" (until reboot)");
}
printk("\n");
pr_info("%s\n", audit_default ?
"enabled (after initialization)" : "disabled (until reboot)");
return 1;
}
__setup("audit=", audit_enable);
/* Process kernel command-line parameter at boot time.
* audit_backlog_limit=<n> */
static int __init audit_backlog_limit_set(char *str)
{
u32 audit_backlog_limit_arg;
pr_info("audit_backlog_limit: ");
if (kstrtouint(str, 0, &audit_backlog_limit_arg)) {
pr_cont("using default of %u, unable to parse %s\n",
audit_backlog_limit, str);
return 1;
}
audit_backlog_limit = audit_backlog_limit_arg;
pr_cont("%d\n", audit_backlog_limit);
return 1;
}
__setup("audit_backlog_limit=", audit_backlog_limit_set);
static void audit_buffer_free(struct audit_buffer *ab)
{
unsigned long flags;
@ -1165,18 +1268,20 @@ static inline void audit_get_stamp(struct audit_context *ctx,
/*
* Wait for auditd to drain the queue a little
*/
static void wait_for_auditd(unsigned long sleep_time)
static long wait_for_auditd(long sleep_time)
{
DECLARE_WAITQUEUE(wait, current);
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&audit_backlog_wait, &wait);
add_wait_queue_exclusive(&audit_backlog_wait, &wait);
if (audit_backlog_limit &&
skb_queue_len(&audit_skb_queue) > audit_backlog_limit)
schedule_timeout(sleep_time);
sleep_time = schedule_timeout(sleep_time);
__set_current_state(TASK_RUNNING);
remove_wait_queue(&audit_backlog_wait, &wait);
return sleep_time;
}
/**
@ -1200,7 +1305,8 @@ struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask,
struct audit_buffer *ab = NULL;
struct timespec t;
unsigned int uninitialized_var(serial);
int reserve;
int reserve = 5; /* Allow atomic callers to go up to five
entries over the normal backlog limit */
unsigned long timeout_start = jiffies;
if (audit_initialized != AUDIT_INITIALIZED)
@ -1209,36 +1315,37 @@ struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask,
if (unlikely(audit_filter_type(type)))
return NULL;
if (gfp_mask & __GFP_WAIT)
reserve = 0;
else
reserve = 5; /* Allow atomic callers to go up to five
entries over the normal backlog limit */
if (gfp_mask & __GFP_WAIT) {
if (audit_pid && audit_pid == current->pid)
gfp_mask &= ~__GFP_WAIT;
else
reserve = 0;
}
while (audit_backlog_limit
&& skb_queue_len(&audit_skb_queue) > audit_backlog_limit + reserve) {
if (gfp_mask & __GFP_WAIT && audit_backlog_wait_time) {
unsigned long sleep_time;
long sleep_time;
sleep_time = timeout_start + audit_backlog_wait_time -
jiffies;
if ((long)sleep_time > 0) {
wait_for_auditd(sleep_time);
continue;
sleep_time = timeout_start + audit_backlog_wait_time - jiffies;
if (sleep_time > 0) {
sleep_time = wait_for_auditd(sleep_time);
if (sleep_time > 0)
continue;
}
}
if (audit_rate_check() && printk_ratelimit())
printk(KERN_WARNING
"audit: audit_backlog=%d > "
"audit_backlog_limit=%d\n",
skb_queue_len(&audit_skb_queue),
audit_backlog_limit);
pr_warn("audit_backlog=%d > audit_backlog_limit=%d\n",
skb_queue_len(&audit_skb_queue),
audit_backlog_limit);
audit_log_lost("backlog limit exceeded");
audit_backlog_wait_time = audit_backlog_wait_overflow;
wake_up(&audit_backlog_wait);
return NULL;
}
audit_backlog_wait_time = AUDIT_BACKLOG_WAIT_TIME;
ab = audit_buffer_alloc(ctx, gfp_mask, type);
if (!ab) {
audit_log_lost("out of memory in audit_log_start");
@ -1356,7 +1463,6 @@ void audit_log_n_hex(struct audit_buffer *ab, const unsigned char *buf,
int i, avail, new_len;
unsigned char *ptr;
struct sk_buff *skb;
static const unsigned char *hex = "0123456789ABCDEF";
if (!ab)
return;
@ -1374,10 +1480,8 @@ void audit_log_n_hex(struct audit_buffer *ab, const unsigned char *buf,
}
ptr = skb_tail_pointer(skb);
for (i=0; i<len; i++) {
*ptr++ = hex[(buf[i] & 0xF0)>>4]; /* Upper nibble */
*ptr++ = hex[buf[i] & 0x0F]; /* Lower nibble */
}
for (i = 0; i < len; i++)
ptr = hex_byte_pack_upper(ptr, buf[i]);
*ptr = 0;
skb_put(skb, len << 1); /* new string is twice the old string */
}
@ -1491,7 +1595,7 @@ void audit_log_d_path(struct audit_buffer *ab, const char *prefix,
void audit_log_session_info(struct audit_buffer *ab)
{
u32 sessionid = audit_get_sessionid(current);
unsigned int sessionid = audit_get_sessionid(current);
uid_t auid = from_kuid(&init_user_ns, audit_get_loginuid(current));
audit_log_format(ab, " auid=%u ses=%u", auid, sessionid);
@ -1716,7 +1820,7 @@ void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk)
audit_log_format(ab,
" ppid=%ld pid=%d auid=%u uid=%u gid=%u"
" euid=%u suid=%u fsuid=%u"
" egid=%u sgid=%u fsgid=%u ses=%u tty=%s",
" egid=%u sgid=%u fsgid=%u tty=%s ses=%u",
sys_getppid(),
tsk->pid,
from_kuid(&init_user_ns, audit_get_loginuid(tsk)),
@ -1728,7 +1832,7 @@ void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk)
from_kgid(&init_user_ns, cred->egid),
from_kgid(&init_user_ns, cred->sgid),
from_kgid(&init_user_ns, cred->fsgid),
audit_get_sessionid(tsk), tty);
tty, audit_get_sessionid(tsk));
get_task_comm(name, tsk);
audit_log_format(ab, " comm=");
@ -1739,7 +1843,8 @@ void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk)
if (mm->exe_file)
audit_log_d_path(ab, " exe=", &mm->exe_file->f_path);
up_read(&mm->mmap_sem);
}
} else
audit_log_format(ab, " exe=(null)");
audit_log_task_context(ab);
}
EXPORT_SYMBOL(audit_log_task_info);

15
kernel/audit.h
View file

@ -209,7 +209,7 @@ struct audit_context {
#endif
};
extern int audit_ever_enabled;
extern u32 audit_ever_enabled;
extern void audit_copy_inode(struct audit_names *name,
const struct dentry *dentry,
@ -240,18 +240,23 @@ extern int audit_uid_comparator(kuid_t left, u32 op, kuid_t right);
extern int audit_gid_comparator(kgid_t left, u32 op, kgid_t right);
extern int parent_len(const char *path);
extern int audit_compare_dname_path(const char *dname, const char *path, int plen);
extern struct sk_buff * audit_make_reply(int pid, int seq, int type,
int done, int multi,
const void *payload, int size);
extern struct sk_buff *audit_make_reply(__u32 portid, int seq, int type,
int done, int multi,
const void *payload, int size);
extern void audit_panic(const char *message);
struct audit_netlink_list {
int pid;
__u32 portid;
pid_t pid;
struct sk_buff_head q;
};
int audit_send_list(void *);
struct audit_net {
struct sock *nlsk;
};
extern int selinux_audit_rule_update(void);
extern struct mutex audit_filter_mutex;

93
kernel/auditfilter.c
View file

@ -972,7 +972,7 @@ static inline int audit_del_rule(struct audit_entry *entry)
}
/* List rules using struct audit_rule_data. */
static void audit_list_rules(int pid, int seq, struct sk_buff_head *q)
static void audit_list_rules(__u32 portid, int seq, struct sk_buff_head *q)
{
struct sk_buff *skb;
struct audit_krule *r;
@ -987,14 +987,15 @@ static void audit_list_rules(int pid, int seq, struct sk_buff_head *q)
data = audit_krule_to_data(r);
if (unlikely(!data))
break;
skb = audit_make_reply(pid, seq, AUDIT_LIST_RULES, 0, 1,
data, sizeof(*data) + data->buflen);
skb = audit_make_reply(portid, seq, AUDIT_LIST_RULES,
0, 1, data,
sizeof(*data) + data->buflen);
if (skb)
skb_queue_tail(q, skb);
kfree(data);
}
}
skb = audit_make_reply(pid, seq, AUDIT_LIST_RULES, 1, 1, NULL, 0);
skb = audit_make_reply(portid, seq, AUDIT_LIST_RULES, 1, 1, NULL, 0);
if (skb)
skb_queue_tail(q, skb);
}
@ -1004,7 +1005,7 @@ static void audit_log_rule_change(char *action, struct audit_krule *rule, int re
{
struct audit_buffer *ab;
uid_t loginuid = from_kuid(&init_user_ns, audit_get_loginuid(current));
u32 sessionid = audit_get_sessionid(current);
unsigned int sessionid = audit_get_sessionid(current);
if (!audit_enabled)
return;
@ -1022,45 +1023,20 @@ static void audit_log_rule_change(char *action, struct audit_krule *rule, int re
}
/**
* audit_receive_filter - apply all rules to the specified message type
* audit_rule_change - apply all rules to the specified message type
* @type: audit message type
* @pid: target pid for netlink audit messages
* @portid: target port id for netlink audit messages
* @seq: netlink audit message sequence (serial) number
* @data: payload data
* @datasz: size of payload data
*/
int audit_receive_filter(int type, int pid, int seq, void *data, size_t datasz)
int audit_rule_change(int type, __u32 portid, int seq, void *data,
size_t datasz)
{
struct task_struct *tsk;
struct audit_netlink_list *dest;
int err = 0;
struct audit_entry *entry;
switch (type) {
case AUDIT_LIST_RULES:
/* We can't just spew out the rules here because we might fill
* the available socket buffer space and deadlock waiting for
* auditctl to read from it... which isn't ever going to
* happen if we're actually running in the context of auditctl
* trying to _send_ the stuff */
dest = kmalloc(sizeof(struct audit_netlink_list), GFP_KERNEL);
if (!dest)
return -ENOMEM;
dest->pid = pid;
skb_queue_head_init(&dest->q);
mutex_lock(&audit_filter_mutex);
audit_list_rules(pid, seq, &dest->q);
mutex_unlock(&audit_filter_mutex);
tsk = kthread_run(audit_send_list, dest, "audit_send_list");
if (IS_ERR(tsk)) {
skb_queue_purge(&dest->q);
kfree(dest);
err = PTR_ERR(tsk);
}
break;
case AUDIT_ADD_RULE:
entry = audit_data_to_entry(data, datasz);
if (IS_ERR(entry))
@ -1087,6 +1063,44 @@ int audit_receive_filter(int type, int pid, int seq, void *data, size_t datasz)
return err;
}
/**
* audit_list_rules_send - list the audit rules
* @portid: target portid for netlink audit messages
* @seq: netlink audit message sequence (serial) number
*/
int audit_list_rules_send(__u32 portid, int seq)
{
struct task_struct *tsk;
struct audit_netlink_list *dest;
int err = 0;
/* We can't just spew out the rules here because we might fill
* the available socket buffer space and deadlock waiting for
* auditctl to read from it... which isn't ever going to
* happen if we're actually running in the context of auditctl
* trying to _send_ the stuff */
dest = kmalloc(sizeof(struct audit_netlink_list), GFP_KERNEL);
if (!dest)
return -ENOMEM;
dest->portid = portid;
dest->pid = task_pid_vnr(current);
skb_queue_head_init(&dest->q);
mutex_lock(&audit_filter_mutex);
audit_list_rules(portid, seq, &dest->q);
mutex_unlock(&audit_filter_mutex);
tsk = kthread_run(audit_send_list, dest, "audit_send_list");
if (IS_ERR(tsk)) {
skb_queue_purge(&dest->q);
kfree(dest);
err = PTR_ERR(tsk);
}
return err;
}
int audit_comparator(u32 left, u32 op, u32 right)
{
switch (op) {
@ -1276,19 +1290,22 @@ int audit_filter_user(int type)
{
enum audit_state state = AUDIT_DISABLED;
struct audit_entry *e;
int ret = 1;
int rc, ret;
ret = 1; /* Audit by default */
rcu_read_lock();
list_for_each_entry_rcu(e, &audit_filter_list[AUDIT_FILTER_USER], list) {
if (audit_filter_user_rules(&e->rule, type, &state)) {
if (state == AUDIT_DISABLED)
rc = audit_filter_user_rules(&e->rule, type, &state);
if (rc) {
if (rc > 0 && state == AUDIT_DISABLED)
ret = 0;
break;
}
}
rcu_read_unlock();
return ret; /* Audit by default */
return ret;
}
int audit_filter_type(int type)

44
kernel/auditsc.c
View file

@ -1969,18 +1969,24 @@ static void audit_log_set_loginuid(kuid_t koldloginuid, kuid_t kloginuid,
int rc)
{
struct audit_buffer *ab;
uid_t uid, ologinuid, nloginuid;
uid_t uid, oldloginuid, loginuid;
if (!audit_enabled)
return;
uid = from_kuid(&init_user_ns, task_uid(current));
ologinuid = from_kuid(&init_user_ns, koldloginuid);
nloginuid = from_kuid(&init_user_ns, kloginuid),
oldloginuid = from_kuid(&init_user_ns, koldloginuid);
loginuid = from_kuid(&init_user_ns, kloginuid),
ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_LOGIN);
if (!ab)
return;
audit_log_format(ab, "pid=%d uid=%u old auid=%u new auid=%u old "
"ses=%u new ses=%u res=%d", current->pid, uid, ologinuid,
nloginuid, oldsessionid, sessionid, !rc);
audit_log_format(ab, "pid=%d uid=%u"
" old-auid=%u new-auid=%u old-ses=%u new-ses=%u"
" res=%d",
current->pid, uid,
oldloginuid, loginuid, oldsessionid, sessionid,
!rc);
audit_log_end(ab);
}
@ -2008,7 +2014,7 @@ int audit_set_loginuid(kuid_t loginuid)
/* are we setting or clearing? */
if (uid_valid(loginuid))
sessionid = atomic_inc_return(&session_id);
sessionid = (unsigned int)atomic_inc_return(&session_id);
task->sessionid = sessionid;
task->loginuid = loginuid;
@ -2321,18 +2327,16 @@ int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
/**
* __audit_log_capset - store information about the arguments to the capset syscall
* @pid: target pid of the capset call
* @new: the new credentials
* @old: the old (current) credentials
*
* Record the aguments userspace sent to sys_capset for later printing by the
* audit system if applicable
*/
void __audit_log_capset(pid_t pid,
const struct cred *new, const struct cred *old)
void __audit_log_capset(const struct cred *new, const struct cred *old)
{
struct audit_context *context = current->audit_context;
context->capset.pid = pid;
context->capset.pid = task_pid_nr(current);
context->capset.cap.effective = new->cap_effective;
context->capset.cap.inheritable = new->cap_effective;
context->capset.cap.permitted = new->cap_permitted;
@ -2352,6 +2356,7 @@ static void audit_log_task(struct audit_buffer *ab)
kuid_t auid, uid;
kgid_t gid;
unsigned int sessionid;
struct mm_struct *mm = current->mm;
auid = audit_get_loginuid(current);
sessionid = audit_get_sessionid(current);
@ -2365,15 +2370,15 @@ static void audit_log_task(struct audit_buffer *ab)
audit_log_task_context(ab);
audit_log_format(ab, " pid=%d comm=", current->pid);
audit_log_untrustedstring(ab, current->comm);
if (mm) {
down_read(&mm->mmap_sem);
if (mm->exe_file)
audit_log_d_path(ab, " exe=", &mm->exe_file->f_path);
up_read(&mm->mmap_sem);
} else
audit_log_format(ab, " exe=(null)");
}
static void audit_log_abend(struct audit_buffer *ab, char *reason, long signr)
{
audit_log_task(ab);
audit_log_format(ab, " reason=");
audit_log_string(ab, reason);
audit_log_format(ab, " sig=%ld", signr);
}
/**
* audit_core_dumps - record information about processes that end abnormally
* @signr: signal value
@ -2394,7 +2399,8 @@ void audit_core_dumps(long signr)
ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_ANOM_ABEND);
if (unlikely(!ab))
return;
audit_log_abend(ab, "memory violation", signr);
audit_log_task(ab);
audit_log_format(ab, " sig=%ld", signr);
audit_log_end(ab);
}

2
kernel/capability.c
View file

@ -277,7 +277,7 @@ SYSCALL_DEFINE2(capset, cap_user_header_t, header, const cap_user_data_t, data)
if (ret < 0)
goto error;
audit_log_capset(pid, new, current_cred());
audit_log_capset(new, current_cred());
return commit_creds(new);

8
net/xfrm/xfrm_policy.c
View file

@ -2906,12 +2906,12 @@ static void xfrm_policy_fini(struct net *net)
flush_work(&net->xfrm.policy_hash_work);
#ifdef CONFIG_XFRM_SUB_POLICY
audit_info.loginuid = INVALID_UID;
audit_info.sessionid = -1;
audit_info.sessionid = (unsigned int)-1;
audit_info.secid = 0;
xfrm_policy_flush(net, XFRM_POLICY_TYPE_SUB, &audit_info);
#endif
audit_info.loginuid = INVALID_UID;
audit_info.sessionid = -1;
audit_info.sessionid = (unsigned int)-1;
audit_info.secid = 0;
xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info);
@ -3017,7 +3017,7 @@ static void xfrm_audit_common_policyinfo(struct xfrm_policy *xp,
}
void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
kuid_t auid, u32 sessionid, u32 secid)
kuid_t auid, unsigned int sessionid, u32 secid)
{
struct audit_buffer *audit_buf;
@ -3032,7 +3032,7 @@ void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
EXPORT_SYMBOL_GPL(xfrm_audit_policy_add);
void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
kuid_t auid, u32 sessionid, u32 secid)
kuid_t auid, unsigned int sessionid, u32 secid)
{
struct audit_buffer *audit_buf;

6
net/xfrm/xfrm_state.c
View file

@ -2043,7 +2043,7 @@ void xfrm_state_fini(struct net *net)
flush_work(&net->xfrm.state_hash_work);
audit_info.loginuid = INVALID_UID;
audit_info.sessionid = -1;
audit_info.sessionid = (unsigned int)-1;
audit_info.secid = 0;
xfrm_state_flush(net, IPSEC_PROTO_ANY, &audit_info);
flush_work(&net->xfrm.state_gc_work);
@ -2109,7 +2109,7 @@ static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
}
void xfrm_audit_state_add(struct xfrm_state *x, int result,
kuid_t auid, u32 sessionid, u32 secid)
kuid_t auid, unsigned int sessionid, u32 secid)
{
struct audit_buffer *audit_buf;
@ -2124,7 +2124,7 @@ void xfrm_audit_state_add(struct xfrm_state *x, int result,
EXPORT_SYMBOL_GPL(xfrm_audit_state_add);
void xfrm_audit_state_delete(struct xfrm_state *x, int result,
kuid_t auid, u32 sessionid, u32 secid)
kuid_t auid, unsigned int sessionid, u32 secid)
{
struct audit_buffer *audit_buf;

12
net/xfrm/xfrm_user.c
View file

@ -600,7 +600,7 @@ static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
int err;
struct km_event c;
kuid_t loginuid = audit_get_loginuid(current);
u32 sessionid = audit_get_sessionid(current);
unsigned int sessionid = audit_get_sessionid(current);
u32 sid;
err = verify_newsa_info(p, attrs);
@ -679,7 +679,7 @@ static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
struct km_event c;
struct xfrm_usersa_id *p = nlmsg_data(nlh);
kuid_t loginuid = audit_get_loginuid(current);
u32 sessionid = audit_get_sessionid(current);
unsigned int sessionid = audit_get_sessionid(current);
u32 sid;
x = xfrm_user_state_lookup(net, p, attrs, &err);
@ -1405,7 +1405,7 @@ static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
int err;
int excl;
kuid_t loginuid = audit_get_loginuid(current);
u32 sessionid = audit_get_sessionid(current);
unsigned int sessionid = audit_get_sessionid(current);
u32 sid;
err = verify_newpolicy_info(p);
@ -1663,7 +1663,7 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
}
} else {
kuid_t loginuid = audit_get_loginuid(current);
u32 sessionid = audit_get_sessionid(current);
unsigned int sessionid = audit_get_sessionid(current);
u32 sid;
security_task_getsecid(current, &sid);
@ -1959,7 +1959,7 @@ static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
err = 0;
if (up->hard) {
kuid_t loginuid = audit_get_loginuid(current);
u32 sessionid = audit_get_sessionid(current);
unsigned int sessionid = audit_get_sessionid(current);
u32 sid;
security_task_getsecid(current, &sid);
@ -2002,7 +2002,7 @@ static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
if (ue->hard) {
kuid_t loginuid = audit_get_loginuid(current);
u32 sessionid = audit_get_sessionid(current);
unsigned int sessionid = audit_get_sessionid(current);
u32 sid;
security_task_getsecid(current, &sid);

12
security/selinux/ss/services.c
View file

@ -2948,25 +2948,21 @@ int selinux_audit_rule_match(u32 sid, u32 field, u32 op, void *vrule,
struct selinux_audit_rule *rule = vrule;
int match = 0;
if (!rule) {
audit_log(actx, GFP_ATOMIC, AUDIT_SELINUX_ERR,
"selinux_audit_rule_match: missing rule\n");
if (unlikely(!rule)) {
WARN_ONCE(1, "selinux_audit_rule_match: missing rule\n");
return -ENOENT;
}
read_lock(&policy_rwlock);
if (rule->au_seqno < latest_granting) {
audit_log(actx, GFP_ATOMIC, AUDIT_SELINUX_ERR,
"selinux_audit_rule_match: stale rule\n");
match = -ESTALE;
goto out;
}
ctxt = sidtab_search(&sidtab, sid);
if (!ctxt) {
audit_log(actx, GFP_ATOMIC, AUDIT_SELINUX_ERR,
"selinux_audit_rule_match: unrecognized SID %d\n",
if (unlikely(!ctxt)) {
WARN_ONCE(1, "selinux_audit_rule_match: unrecognized SID %d\n",
sid);
match = -ENOENT;
goto out;

5
security/smack/smack_lsm.c
View file

@ -3616,9 +3616,8 @@ static int smack_audit_rule_match(u32 secid, u32 field, u32 op, void *vrule,
struct smack_known *skp;
char *rule = vrule;
if (!rule) {
audit_log(actx, GFP_ATOMIC, AUDIT_SELINUX_ERR,
"Smack: missing rule\n");
if (unlikely(!rule)) {
WARN_ONCE(1, "Smack: missing rule\n");
return -ENOENT;
}