diff options
| author | David Woodhouse <dwmw2@shinybook.infradead.org> | 2005-06-19 19:35:50 +0100 |
|---|---|---|
| committer | David Woodhouse <dwmw2@shinybook.infradead.org> | 2005-06-19 19:35:50 +0100 |
| commit | 0f45aa18e65cf3d768082d7d86054a0d2a20bb18 (patch) | |
| tree | 6e94dfcd813061f5a710b5621e1b2f5a01a95533 /kernel/audit.c | |
| parent | 0107b3cf3225aed6ddde4fa8dbcd4ed643b34f4d (diff) | |
| download | lwn-0f45aa18e65cf3d768082d7d86054a0d2a20bb18.tar.gz lwn-0f45aa18e65cf3d768082d7d86054a0d2a20bb18.zip | |
AUDIT: Allow filtering of user messages
Turn the field from a bitmask to an enumeration and add a list to allow
filtering of messages generated by userspace. We also define a list for
file system watches in anticipation of that feature.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'kernel/audit.c')
| -rw-r--r-- | kernel/audit.c | 36 |
1 files changed, 20 insertions, 16 deletions
diff --git a/kernel/audit.c b/kernel/audit.c index ef35166fdc29..f0bbfe073136 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -107,13 +107,6 @@ static struct sk_buff_head audit_skb_queue; static struct task_struct *kauditd_task; static DECLARE_WAIT_QUEUE_HEAD(kauditd_wait); -/* There are three lists of rules -- one to search at task creation - * time, one to search at syscall entry time, and another to search at - * syscall exit time. */ -static LIST_HEAD(audit_tsklist); -static LIST_HEAD(audit_entlist); -static LIST_HEAD(audit_extlist); - /* The netlink socket is only to be read by 1 CPU, which lets us assume * that list additions and deletions never happen simultaneously in * auditsc.c */ @@ -376,6 +369,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh) u16 msg_type = nlh->nlmsg_type; uid_t loginuid; /* loginuid of sender */ struct audit_sig_info sig_data; + struct task_struct *tsk; err = audit_netlink_ok(NETLINK_CB(skb).eff_cap, msg_type); if (err) @@ -435,15 +429,25 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh) break; case AUDIT_USER: case AUDIT_FIRST_USER_MSG...AUDIT_LAST_USER_MSG: - ab = audit_log_start(NULL, msg_type); - if (!ab) - break; /* audit_panic has been called */ - audit_log_format(ab, - "user pid=%d uid=%u auid=%u" - " msg='%.1024s'", - pid, uid, loginuid, (char *)data); - audit_set_pid(ab, pid); - audit_log_end(ab); + read_lock(&tasklist_lock); + tsk = find_task_by_pid(pid); + if (tsk) + get_task_struct(tsk); + read_unlock(&tasklist_lock); + if (!tsk) + return -ESRCH; + + if (audit_filter_user(tsk, msg_type)) { + ab = audit_log_start(NULL, msg_type); + if (ab) { + audit_log_format(ab, + "user pid=%d uid=%u auid=%u msg='%.1024s'", + pid, uid, loginuid, (char *)data); + audit_set_pid(ab, pid); + audit_log_end(ab); + } + } + put_task_struct(tsk); break; case AUDIT_ADD: case AUDIT_DEL: |