diff options
| author | Sabrina Dubroca <sd@queasysnail.net> | 2017-09-08 10:26:19 +0200 |
|---|---|---|
| committer | Willy Tarreau <w@1wt.eu> | 2017-11-02 10:46:00 +0100 |
| commit | 4e39d5e48bac267582da35d420bf67f985105fd7 (patch) | |
| tree | 6385d5fd5e9d827efa60671f88e1626ba05dceb1 | |
| parent | dd3e5010b97a24dd08dfefce517e06dc91fb01ad (diff) | |
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Willy Tarreau <w@1wt.eu>
| -rw-r--r-- | net/ipv6/ip6_fib.c | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c index 46458ee31939..8a023b5ea193 100644 --- a/net/ipv6/ip6_fib.c +++ b/net/ipv6/ip6_fib.c @@ -167,6 +167,12 @@ static __inline__ void rt6_release(struct rt6_info *rt) dst_free(&rt->dst); } +static void fib6_free_table(struct fib6_table *table) +{ + inetpeer_invalidate_tree(&table->tb6_peers); + kfree(table); +} + static void fib6_link_table(struct net *net, struct fib6_table *tb) { unsigned int h; @@ -1738,15 +1744,22 @@ out_timer: static void fib6_net_exit(struct net *net) { + unsigned int i; + rt6_ifdown(net, NULL); del_timer_sync(&net->ipv6.ip6_fib_timer); -#ifdef CONFIG_IPV6_MULTIPLE_TABLES - inetpeer_invalidate_tree(&net->ipv6.fib6_local_tbl->tb6_peers); - kfree(net->ipv6.fib6_local_tbl); -#endif - inetpeer_invalidate_tree(&net->ipv6.fib6_main_tbl->tb6_peers); - kfree(net->ipv6.fib6_main_tbl); + for (i = 0; i < FIB_TABLE_HASHSZ; i++) { + struct hlist_head *head = &net->ipv6.fib_table_hash[i]; + struct hlist_node *tmp; + struct fib6_table *tb; + + hlist_for_each_entry_safe(tb, tmp, head, tb6_hlist) { + hlist_del(&tb->tb6_hlist); + fib6_free_table(tb); + } + } + kfree(net->ipv6.fib_table_hash); kfree(net->ipv6.rt6_stats); } |