AUDIT: Fix reported length of audit messages.

We were setting nlmsg_len to skb->len, but we should be subtracting
the size of the header.

From: Steve Grubb <sgrubb@redhat.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

diff --git a/kernel/audit.c b/kernel/audit.c
index b86007d..2ddd1a2 100644 (file)
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -488,7 +488,7 @@ static inline int audit_log_drain(struct audit_buffer *ab)
 
                if (audit_pid) {
                        struct nlmsghdr *nlh = (struct nlmsghdr *)skb->data;
-                       nlh->nlmsg_len = skb->len;
+                       nlh->nlmsg_len = skb->len - sizeof(*nlh);
                        skb_get(skb); /* because netlink_* frees */
                        retval = netlink_unicast(audit_sock, skb, audit_pid,
                                                 MSG_DONTWAIT);