| From | Paul Gortmaker <> | Subject | [34-longterm 160/196] ipv6: Silence privacy extensions initialization | Date | Mon, 12 Mar 2012 20:21:13 -0400 |
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From: Romain Francoise <romain@orebokech.com>
------------------- This is a commit scheduled for the next v2.6.34 longterm release. If you see a problem with using this for longterm, please comment. -------------------
commit 2fdc1c8093255f9da877d7b9ce3f46c2098377dc upstream.
When a network namespace is created (via CLONE_NEWNET), the loopback interface is automatically added to the new namespace, triggering a printk in ipv6_add_dev() if CONFIG_IPV6_PRIVACY is set.
This is problematic for applications which use CLONE_NEWNET as part of a sandbox, like Chromium's suid sandbox or recent versions of vsftpd. On a busy machine, it can lead to thousands of useless "lo: Disabled Privacy Extensions" messages appearing in dmesg.
It's easy enough to check the status of privacy extensions via the use_tempaddr sysctl, so just removing the printk seems like the most sensible solution.
Signed-off-by: Romain Francoise <romain@orebokech.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> --- net/ipv6/addrconf.c | 3 --- 1 file changed, 3 deletions(-)
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 844ffc5..34ad669 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -408,9 +408,6 @@ static struct inet6_dev * ipv6_add_dev(struct net_device *dev) dev->type == ARPHRD_TUNNEL6 || dev->type == ARPHRD_SIT || dev->type == ARPHRD_NONE) { - printk(KERN_INFO - "%s: Disabled Privacy Extensions\n", - dev->name); ndev->cnf.use_tempaddr = -1; } else { in6_dev_hold(ndev); -- 1.7.9.3
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