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 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
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-4.9 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 Sun Jan 28 17:37:09 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 @@ -1800,6 +1800,7 @@ 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, ipc6, rt, fl6); if (err) {
Patches currently in stable-queue which might be from edumazet@google.com are
queue-4.9/ipv6-fix-udpv6-sendmsg-crash-caused-by-too-small-mtu.patch queue-4.9/flow_dissector-properly-cap-thoff-field.patch queue-4.9/ipv6-ip6_make_skb-needs-to-clear-cork.base.dst.patch queue-4.9/dccp-don-t-restart-ccid2_hc_tx_rto_expire-if-sk-in-closed-state.patch queue-4.9/net-qdisc_pkt_len_init-should-be-more-robust.patch