Patch "ipv6: ip6_make_skb() needs to clear cork.base.dst" has been added to the 4.4-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    ipv6: ip6_make_skb() needs to clear cork.base.dst

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     ipv6-ip6_make_skb-needs-to-clear-cork.base.dst.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Mon Jan 29 10:14:57 CET 2018
From: Eric Dumazet <edumazet@google.com>
Date: Thu, 11 Jan 2018 22:31:18 -0800
Subject: ipv6: ip6_make_skb() needs to clear cork.base.dst

From: Eric Dumazet <edumazet@google.com>


[ Upstream commit 95ef498d977bf44ac094778fd448b98af158a3e6 ]

In my last patch, I missed fact that cork.base.dst was not initialized
in ip6_make_skb() :

If ip6_setup_cork() returns an error, we might attempt a dst_release()
on some random pointer.

Fixes: 862c03ee1deb ("ipv6: fix possible mem leaks in ipv6_make_skb()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/ipv6/ip6_output.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -1785,6 +1785,7 @@ struct sk_buff *ip6_make_skb(struct sock
 	cork.base.flags = 0;
 	cork.base.addr = 0;
 	cork.base.opt = NULL;
+	cork.base.dst = NULL;
 	v6_cork.opt = NULL;
 	err = ip6_setup_cork(sk, &cork, &v6_cork, hlimit, tclass, opt, rt, fl6);
 	if (err) {


Patches currently in stable-queue which might be from edumazet@google.com are

queue-4.4/ipv6-fix-udpv6-sendmsg-crash-caused-by-too-small-mtu.patch
queue-4.4/flow_dissector-properly-cap-thoff-field.patch
queue-4.4/ipv6-ip6_make_skb-needs-to-clear-cork.base.dst.patch
queue-4.4/dccp-don-t-restart-ccid2_hc_tx_rto_expire-if-sk-in-closed-state.patch
queue-4.4/netfilter-restart-search-if-moved-to-other-chain.patch
queue-4.4/net-qdisc_pkt_len_init-should-be-more-robust.patch