From: Sabrina Dubroca <sd@queasysnail.net>
Date: Fri, 8 Sep 2017 08:26:19 +0000 (+0200)
Subject: ipv6: fix memory leak with multiple tables during netns destruction
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=commitdiff_plain;h=4faaefb9e038c5aa09ff5b33a91c2bf9b8b37e93;ds=sidebyside

ipv6: fix memory leak with multiple tables during netns destruction

commit ba1cc08d9488c94cb8d94f545305688b72a2a300 upstream.

fib6_net_exit only frees the main and local tables. If another table was
created with fib6_alloc_table, we leak it when the netns is destroyed.

Fix this in the same way ip_fib_net_exit cleans up tables, by walking
through the whole hashtable of fib6_table's. We can get rid of the
special cases for local and main, since they're also part of the
hashtable.

Reproducer:
    ip netns add x
    ip -net x -6 rule add from 6003:1::/64 table 100
    ip netns del x

Reported-by: Jianlin Shi <jishi@redhat.com>
Fixes: 58f09b78b730 ("[NETNS][IPV6] ip6_fib - make it per network namespace")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
[bwh: Backported to 3.2:
 - No need to call inetpeer_invalidate_tree()
 - Add the extra iterator variable needed by hlist_for_each_entry_safe()]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

Reading git-diff-tree failed