diff options
| author | Sabrina Dubroca <sd@queasysnail.net> | 2017-09-08 08:26:19 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-09-20 06:19:56 (GMT) |
| commit | c9335db792c04be68e553c6d0537c9df8b20e557 (patch) | |
| tree | 74f2b760db283e1fe3d59a4f09dcdde6df43ccc8 /net/ipv6 | |
| parent | ca7d8a337bd3e3eda49ab1b4dfa09ac9b335a56b (diff) | |
| download | linux-c9335db792c04be68e553c6d0537c9df8b20e557.tar.xz | |
ipv6: fix memory leak with multiple tables during netns destruction
[ Upstream commit ba1cc08d9488c94cb8d94f545305688b72a2a300 ]
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>
Diffstat (limited to 'net/ipv6')
| -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 af74422..291ec5e 100644 --- a/net/ipv6/ip6_fib.c +++ b/net/ipv6/ip6_fib.c @@ -201,6 +201,12 @@ static void rt6_release(struct rt6_info *rt) } } +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; @@ -1893,15 +1899,22 @@ 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); } |