lkml.org 
[lkml]   [2011]   [Mar]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: 2.6.38 containers bug: Infinite loop in /proc/sys/net/ipv6/neigh/neigh/neigh...
    On 03/30/2011 04:01 AM, David Miller wrote:
    > From: Rob Landley <rlandley@parallels.com>
    > Date: Wed, 30 Mar 2011 03:29:16 -0500
    >
    >> In the host context a find on /proc completes, but inside an lxc
    >> container a find on /proc never completes, due to the endless loop in
    >> the title. (It's not a symlink, it seems to be a cross linked directory.)
    >>
    >> This is vanilla 2.6.38, I can attach my .config if you think it'd help.
    >> (The container's the lxc debian sid template but that's probably not
    >> relevant.)
    >
    > Please CC: netdev@vger.kernel.org when a bug might be related to
    > networking, as is obviously the case here.
    >
    > This bug should be fixed by the following patch:
    >
    > --------------------
    > commit 9d2a8fa96a44ba242de3a6f56acaef7a40a97b97
    > Author: Eric W. Biederman <ebiederm@aristanetworks.com>
    > Date: Mon Mar 21 18:23:34 2011 -0700
    >
    > net ipv6: Fix duplicate /proc/sys/net/ipv6/neigh directory entries.
    >
    > When I was fixing issues with unregisgtering tables under /proc/sys/net/ipv6/neigh
    > by adding a mount point it appears I missed a critical ordering issue, in the
    > ipv6 initialization. I had not realized that ipv6_sysctl_register is called
    > at the very end of the ipv6 initialization and in particular after we call
    > neigh_sysctl_register from ndisc_init.
    >
    > "neigh" needs to be initialized in ipv6_static_sysctl_register which is
    > the first ipv6 table to initialized, and definitely before ndisc_init.
    > This removes the weirdness of duplicate tables while still providing a
    > "neigh" mount point which prevents races in sysctl unregistering.
    >
    > This was initially reported at https://bugzilla.kernel.org/show_bug.cgi?id=31232
    > Reported-by: sunkan@zappa.cx
    > Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com>
    > Signed-off-by: David S. Miller <davem@davemloft.net>


    Yes, that fixed it. Pinging the stable guys to make sure this goes in a
    dot release.

    Thanks,

    Rob


    \
     
     \ /
      Last update: 2011-03-30 12:19    [W:0.042 / U:59.880 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site