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| author |   Alexander Kuznetsov <wwfq@yandex-team.ru> | 2021-10-27 11:00:08 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2021-10-28 12:53:39 +0100 |
| commit | 06e6c88fba2413a8408f321b0b3a5b0954e76436 (patch) | |
| tree | 735093c91d980821829a18ec625a443519064f45 /net/ipv6/route.c | |
| parent | mpt fusion: use dev_addr_set() (diff) | |
| download | linux-dev-06e6c88fba2413a8408f321b0b3a5b0954e76436.tar.xz linux-dev-06e6c88fba2413a8408f321b0b3a5b0954e76436.zip | |
ipv6: enable net.ipv6.route.max_size sysctl in network namespace
We want to increase route cache size in network namespace
created with user namespace. Currently ipv6 route settings
are disabled for non-initial network namespaces.
We can allow this sysctl and it will be safe since
commit <6126891c6d4f> because route cache account to kmem,
that is why users from user namespace can not DOS system.
Signed-off-by: Alexander Kuznetsov <wwfq@yandex-team.ru>
Acked-by: Dmitry Yakunin <zeil@yandex-team.ru>
Acked-by: Dmitry Monakhov <dmtrmonakhov@yandex-team.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/route.c')
| -rw-r--r-- | net/ipv6/route.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 9b9ef09382ab..3ae25b8ffbd6 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -6306,11 +6306,11 @@ static int ipv6_sysctl_rtcache_flush(struct ctl_table *ctl, int write, static struct ctl_table ipv6_route_table_template[] = { { - .procname = "flush", - .data = &init_net.ipv6.sysctl.flush_delay, + .procname = "max_size", + .data = &init_net.ipv6.sysctl.ip6_rt_max_size, .maxlen = sizeof(int), - .mode = 0200, - .proc_handler = ipv6_sysctl_rtcache_flush + .mode = 0644, + .proc_handler = proc_dointvec, }, { .procname = "gc_thresh", @@ -6320,11 +6320,11 @@ static struct ctl_table ipv6_route_table_template[] = { .proc_handler = proc_dointvec, }, { - .procname = "max_size", - .data = &init_net.ipv6.sysctl.ip6_rt_max_size, + .procname = "flush", + .data = &init_net.ipv6.sysctl.flush_delay, .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = proc_dointvec, + .mode = 0200, + .proc_handler = ipv6_sysctl_rtcache_flush }, { .procname = "gc_min_interval", @@ -6396,10 +6396,10 @@ struct ctl_table * __net_init ipv6_route_sysctl_init(struct net *net) GFP_KERNEL); if (table) { - table[0].data = &net->ipv6.sysctl.flush_delay; - table[0].extra1 = net; + table[0].data = &net->ipv6.sysctl.ip6_rt_max_size; table[1].data = &net->ipv6.ip6_dst_ops.gc_thresh; - table[2].data = &net->ipv6.sysctl.ip6_rt_max_size; + table[2].data = &net->ipv6.sysctl.flush_delay; + table[2].extra1 = net; table[3].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval; table[4].data = &net->ipv6.sysctl.ip6_rt_gc_timeout; table[5].data = &net->ipv6.sysctl.ip6_rt_gc_interval; @@ -6411,7 +6411,7 @@ struct ctl_table * __net_init ipv6_route_sysctl_init(struct net *net) /* Don't export sysctls to unprivileged users */ if (net->user_ns != &init_user_ns) - table[0].procname = NULL; + table[1].procname = NULL; } return table; |