Patch "geneve: lock RCU on TX path" has been added to the 4.10-stable tree

Patch "geneve: lock RCU on TX path" has been added to the 4.10-stable tree

[gregkh]

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

    geneve: lock RCU on TX path

to the 4.10-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:
     geneve-lock-rcu-on-tx-path.patch
and it can be found in the queue-4.10 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 Sat Mar 18 22:03:53 CST 2017
From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Fri, 24 Feb 2017 11:43:37 -0800
Subject: geneve: lock RCU on TX path

From: Jakub Kicinski <jakub.kicinski@netronome.com>


[ Upstream commit a717e3f740803cc88bd5c9a70c93504f6a368663 ]

There is no guarantees that callers of the TX path will hold
the RCU lock.  Grab it explicitly.

Fixes: fceb9c3e3825 ("geneve: avoid using stale geneve socket.")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/geneve.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/net/geneve.c
+++ b/drivers/net/geneve.c
@@ -881,12 +881,14 @@ static netdev_tx_t geneve_xmit(struct sk
 		info = &geneve->info;
 	}
 
+	rcu_read_lock();
 #if IS_ENABLED(CONFIG_IPV6)
 	if (info->mode & IP_TUNNEL_INFO_IPV6)
 		err = geneve6_xmit_skb(skb, dev, geneve, info);
 	else
 #endif
 		err = geneve_xmit_skb(skb, dev, geneve, info);
+	rcu_read_unlock();
 
 	if (likely(!err))
 		return NETDEV_TX_OK;


Patches currently in stable-queue which might be from jakub.kicinski@netronome.com are

queue-4.10/vxlan-lock-rcu-on-tx-path.patch
queue-4.10/geneve-lock-rcu-on-tx-path.patch