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audit: simplify audit_enabled check in audit_watch_log_rule_change()

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Check the audit_enabled flag and bail immediately.  This does not change
the functionality, but brings the code format in line with similar
checks in audit_tree_log_remove_rule(), audit_mark_log_rule_change(),
and elsewhere in the audit code.

See: https://github.com/linux-audit/audit-kernel/issues/50

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
[PM: tweaked subject line]
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Richard Guy Briggs 2018-06-14 16:20:06 -04:00 committed by Paul Moore
parent 65a8766f5f
commit 4fa7f08699
1 changed files with 15 additions and 14 deletions
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29
kernel/audit_watch.c
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@ -238,20 +238,21 @@ out:
static void audit_watch_log_rule_change(struct audit_krule *r, struct audit_watch *w, char *op)
{
if (audit_enabled) {
struct audit_buffer *ab;
ab = audit_log_start(NULL, GFP_NOFS, AUDIT_CONFIG_CHANGE);
if (unlikely(!ab))
return;
audit_log_format(ab, "auid=%u ses=%u op=%s",
from_kuid(&init_user_ns, audit_get_loginuid(current)),
audit_get_sessionid(current), op);
audit_log_format(ab, " path=");
audit_log_untrustedstring(ab, w->path);
audit_log_key(ab, r->filterkey);
audit_log_format(ab, " list=%d res=1", r->listnr);
audit_log_end(ab);
}
struct audit_buffer *ab;
if (!audit_enabled)
return;
ab = audit_log_start(NULL, GFP_NOFS, AUDIT_CONFIG_CHANGE);
if (!ab)
return;
audit_log_format(ab, "auid=%u ses=%u op=%s",
from_kuid(&init_user_ns, audit_get_loginuid(current)),
audit_get_sessionid(current), op);
audit_log_format(ab, " path=");
audit_log_untrustedstring(ab, w->path);
audit_log_key(ab, r->filterkey);
audit_log_format(ab, " list=%d res=1", r->listnr);
audit_log_end(ab);
}
/* Update inode info in audit rules based on filesystem event. */