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[IPV6]: ipv6_fl_socklist is inadvertently shared.

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The ipv6_fl_socklist from listening socket is inadvertently shared
with new socket created for connection.  This leads to a variety of
interesting, but fatal, bugs. For example, removing one of the
sockets may lead to the other socket's encountering a page fault
when the now freed list is referenced.

The fix is to not share the flow label list with the new socket.

Signed-off-by: Masayuki Nakagawa <nakagawa.msy@ncos.nec.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Masayuki Nakagawa 2007-03-16 16:14:03 -07:00 committed by David S. Miller
parent 53cdcc04c1
commit d35690beda
1 changed files with 1 additions and 0 deletions
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net/ipv6/tcp_ipv6.c
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@ -1453,6 +1453,7 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
First: no IPv4 options.
*/
newinet->opt = NULL;
newnp->ipv6_fl_list = NULL;
/* Clone RX bits */
newnp->rxopt.all = np->rxopt.all;