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authorEric W. Biederman <ebiederm@xmission.com>2010-06-13 03:31:06 +0000
committerDavid S. Miller <davem@davemloft.net>2010-06-16 14:55:56 -0700
commitb47030c71dfd6c8cd5cb6e551b6f7f7cfc96f6a6 (patch)
treef9c1e24e6e3da8ae1de1bd50be3e7ef0d81269ae
parent109f6e39fa07c48f580125f531f46cb7c245b528 (diff)
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af_netlink: Add needed scm_destroy after scm_send.
scm_send occasionally allocates state in the scm_cookie, so I have modified netlink_sendmsg to guarantee that when scm_send succeeds scm_destory will be called to free that state. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@free.fr> Acked-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/netlink/af_netlink.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index a2eb965207d..7aeaa83193d 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1323,19 +1323,23 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock,
if (msg->msg_flags&MSG_OOB)
return -EOPNOTSUPP;
- if (NULL == siocb->scm)
+ if (NULL == siocb->scm) {
siocb->scm = &scm;
+ memset(&scm, 0, sizeof(scm));
+ }
err = scm_send(sock, msg, siocb->scm);
if (err < 0)
return err;
if (msg->msg_namelen) {
+ err = -EINVAL;
if (addr->nl_family != AF_NETLINK)
- return -EINVAL;
+ goto out;
dst_pid = addr->nl_pid;
dst_group = ffs(addr->nl_groups);
+ err = -EPERM;
if (dst_group && !netlink_capable(sock, NL_NONROOT_SEND))
- return -EPERM;
+ goto out;
} else {
dst_pid = nlk->dst_pid;
dst_group = nlk->dst_group;
@@ -1387,6 +1391,7 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock,
err = netlink_unicast(sk, skb, dst_pid, msg->msg_flags&MSG_DONTWAIT);
out:
+ scm_destroy(siocb->scm);
return err;
}