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audit: Don't pass pid or uid to audit_log_common_recv_msg 

The only place we use the uid and the pid that we calculate in
audit_receive_msg is in audit_log_common_recv_msg so move the
calculation of these values into the audit_log_common_recv_msg.

Simplify the calcuation of the current pid and uid by
reading them from current instead of reading them from
NETLINK_CREDS.

Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric Paris <eparis@redhat.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2012-09-11 00:24:49 -07:00
parent 017143fecb
commit 860c0aaff7
1 changed files with 14 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
kernel/audit.c
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@ -607,8 +607,7 @@ static int audit_netlink_ok(struct sk_buff *skb, u16 msg_type)
}
static int audit_log_common_recv_msg(struct audit_buffer **ab, u16 msg_type,
u32 pid, u32 uid, uid_t auid, u32 ses,
u32 sid)
uid_t auid, u32 ses, u32 sid)
{
int rc = 0;
char *ctx = NULL;
@ -621,7 +620,9 @@ static int audit_log_common_recv_msg(struct audit_buffer **ab, u16 msg_type,
*ab = audit_log_start(NULL, GFP_KERNEL, msg_type);
audit_log_format(*ab, "pid=%d uid=%u auid=%u ses=%u",
pid, uid, auid, ses);
task_tgid_vnr(current),
from_kuid(&init_user_ns, current_uid()),
auid, ses);
if (sid) {
rc = security_secid_to_secctx(sid, &ctx, &len);
if (rc)
@ -637,7 +638,7 @@ static int audit_log_common_recv_msg(struct audit_buffer **ab, u16 msg_type,
static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
{
u32 uid, pid, seq, sid;
u32 seq, sid;
void *data;
struct audit_status *status_get, status_set;
int err;
@ -663,8 +664,6 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
return err;
}
pid = NETLINK_CREDS(skb)->pid;
uid = NETLINK_CREDS(skb)->uid;
loginuid = audit_get_loginuid(current);
sessionid = audit_get_sessionid(current);
security_task_getsecid(current, &sid);
@ -735,7 +734,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
if (err)
break;
}
audit_log_common_recv_msg(&ab, msg_type, pid, uid,
audit_log_common_recv_msg(&ab, msg_type,
loginuid, sessionid, sid);
if (msg_type != AUDIT_USER_TTY)
@ -760,8 +759,8 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
if (nlmsg_len(nlh) < sizeof(struct audit_rule))
return -EINVAL;
if (audit_enabled == AUDIT_LOCKED) {
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE, pid,
uid, loginuid, sessionid, sid);
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE,
loginuid, sessionid, sid);
audit_log_format(ab, " audit_enabled=%d res=0",
audit_enabled);
@ -779,8 +778,8 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
if (nlmsg_len(nlh) < sizeof(struct audit_rule_data))
return -EINVAL;
if (audit_enabled == AUDIT_LOCKED) {
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE, pid,
uid, loginuid, sessionid, sid);
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE,
loginuid, sessionid, sid);
audit_log_format(ab, " audit_enabled=%d res=0",
audit_enabled);
@ -796,8 +795,8 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
case AUDIT_TRIM:
audit_trim_trees();
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE, pid,
uid, loginuid, sessionid, sid);
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE,
loginuid, sessionid, sid);
audit_log_format(ab, " op=trim res=1");
audit_log_end(ab);
@ -828,8 +827,8 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
/* OK, here comes... */
err = audit_tag_tree(old, new);
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE, pid,
uid, loginuid, sessionid, sid);
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE,
loginuid, sessionid, sid);
audit_log_format(ab, " op=make_equiv old=");
audit_log_untrustedstring(ab, old);