From: Jeremy Cline <jcl...@redhat.com>
Date: Thu, 6 Jun 2019 13:07:29 -0400
> Hi,
>
> On Sat, May 04, 2019 at 12:41:00AM -0400, David Miller wrote:
>> From: David Ahern <dsah...@kernel.org>
>> Date: Wed, 1 May 2019 18:08:34 -0700
>>
>> > From: David Ahern <dsah...@gmail.com>
>> >
>> > Ian and Alan both reported seeing overflows after upgrades to 5.x kernels:
>> > neighbour: arp_cache: neighbor table overflow!
>> >
>> > Alan's mpls script helped get to the bottom of this bug. When a new entry
>> > is created the gc_entries counter is bumped in neigh_alloc to check if a
>> > new one is allowed to be created. ___neigh_create then searches for an
>> > existing entry before inserting the just allocated one. If an entry
>> > already exists, the new one is dropped in favor of the existing one. In
>> > this case the cleanup path needs to drop the gc_entries counter. There
>> > is no memory leak, only a counter leak.
>> >
>> > Fixes: 58956317c8d ("neighbor: Improve garbage collection")
>> > Reported-by: Ian Kumlien <ian.kuml...@gmail.com>
>> > Reported-by: Alan Maguire <alan.magu...@oracle.com>
>> > Signed-off-by: David Ahern <dsah...@gmail.com>
>>
>> Applied and queued up for -stable.
>
> Did this get lost in the shuffle? I see it in mainline, but I don't see
> it in stable. Folks are encountering it with recent 5.1 kernels in
> Fedora: https://bugzilla.redhat.com/show_bug.cgi?id=1708717.
It's there in the -stable queue:
https://patchwork.ozlabs.org/bundle/davem/stable/?series=&submitter=&state=*&q=&archive=
So it will (eventually) get sent.
