diff options
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/reassembly.c | 41 |
1 files changed, 38 insertions, 3 deletions
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c index 241b2cc49bf..0300dcbf1a7 100644 --- a/net/ipv6/reassembly.c +++ b/net/ipv6/reassembly.c @@ -670,17 +670,52 @@ static struct ctl_table ip6_frags_ctl_table[] = { static int ip6_frags_sysctl_register(struct net *net) { + struct ctl_table *table; struct ctl_table_header *hdr; - hdr = register_net_sysctl_table(net, net_ipv6_ctl_path, - ip6_frags_ctl_table); - return hdr == NULL ? -ENOMEM : 0; + table = ip6_frags_ctl_table; + if (net != &init_net) { + table = kmemdup(table, sizeof(ip6_frags_ctl_table), GFP_KERNEL); + if (table == NULL) + goto err_alloc; + + table[0].mode &= ~0222; + table[1].mode &= ~0222; + table[2].mode &= ~0222; + table[3].mode &= ~0222; + } + + hdr = register_net_sysctl_table(net, net_ipv6_ctl_path, table); + if (hdr == NULL) + goto err_reg; + + net->ipv6.sysctl.frags_hdr = hdr; + return 0; + +err_reg: + if (net != &init_net) + kfree(table); +err_alloc: + return -ENOMEM; +} + +static void ip6_frags_sysctl_unregister(struct net *net) +{ + struct ctl_table *table; + + table = net->ipv6.sysctl.frags_hdr->ctl_table_arg; + unregister_net_sysctl_table(net->ipv6.sysctl.frags_hdr); + kfree(table); } #else static inline int ip6_frags_sysctl_register(struct net *net) { return 0; } + +static inline void ip6_frags_sysctl_unregister(struct net *net) +{ +} #endif static int ipv6_frags_init_net(struct net *net) |