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[NETLINK]: Fix use-after-free in netlink_recvmsg 

The skb given to netlink_cmsg_recv_pktinfo is already freed, move it up
a few lines.

Coverity #948

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2006-03-12 20:34:27 -08:00 committed by David S. Miller
parent f8dc01f543
commit cc9a06cd8d
1 changed files with 3 additions and 2 deletions
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5
net/netlink/af_netlink.c
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@ -1194,6 +1194,9 @@ static int netlink_recvmsg(struct kiocb *kiocb, struct socket *sock,
msg->msg_namelen = sizeof(*addr); msg->msg_namelen = sizeof(*addr);
} }
if (nlk->flags & NETLINK_RECV_PKTINFO)
netlink_cmsg_recv_pktinfo(msg, skb);
if (NULL == siocb->scm) { if (NULL == siocb->scm) {
memset(&scm, 0, sizeof(scm)); memset(&scm, 0, sizeof(scm));
siocb->scm = &scm; siocb->scm = &scm;
@ -1205,8 +1208,6 @@ static int netlink_recvmsg(struct kiocb *kiocb, struct socket *sock,
netlink_dump(sk); netlink_dump(sk);
scm_recv(sock, msg, siocb->scm, flags); scm_recv(sock, msg, siocb->scm, flags);
if (nlk->flags & NETLINK_RECV_PKTINFO)
netlink_cmsg_recv_pktinfo(msg, skb);
out: out:
netlink_rcv_wake(sk); netlink_rcv_wake(sk);