summaryrefslogtreecommitdiff
path: root/kernel/audit.c
diff options
context:
space:
mode:
authorRichard Guy Briggs <rgb@redhat.com>2013-12-02 11:33:01 -0500
committerEric Paris <eparis@redhat.com>2014-01-13 22:32:11 -0500
commit1b7b533f65db9b31f76972b2899ec7ec6433ae77 (patch)
tree8b06c5c5fd3a8844647c66a75f63d2bf2197cc6a /kernel/audit.c
parent4eb0f4abfb9441849530ea19389ae57cc62c8078 (diff)
downloadlinux-sh-1b7b533f65db9b31f76972b2899ec7ec6433ae77.tar.gz
audit: drop audit_cmd_lock in AUDIT_USER family of cases
We do not need to hold the audit_cmd_mutex for this family of cases. The possible exception to this is the call to audit_filter_user(), so drop the lock immediately after. To help in fixing the race we are trying to avoid, make sure that nothing called by audit_filter_user() calls audit_log_start(). In particular, watch out for *_audit_rule_match(). This fix will take care of systemd and anything USING audit. It still means that we could race with something configuring audit and auditd shutting down. Signed-off-by: Richard Guy Briggs <rgb@redhat.com> Reported-by: toshi.okajima@jp.fujitsu.com Tested-by: toshi.okajima@jp.fujitsu.com Signed-off-by: Eric Paris <eparis@redhat.com>
Diffstat (limited to 'kernel/audit.c')
-rw-r--r--kernel/audit.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/audit.c b/kernel/audit.c
index ce8514f9aa6c..c05b6027e874 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -876,6 +876,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
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'",
@@ -893,6 +894,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
}
audit_set_portid(ab, NETLINK_CB(skb).portid);
audit_log_end(ab);
+ mutex_lock(&audit_cmd_mutex);
}
break;
case AUDIT_ADD_RULE: