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| author |   Pablo Neira Ayuso <pablo@netfilter.org> | 2017-04-28 16:22:11 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2017-04-28 16:22:11 +0200 |
| commit | 1a41dbce0dedc2dbf136060f686e0c43d903b612 (patch) | |
| tree | 932c82dd8b74fe5f63214ade6610fec5aadc0633 /net/netfilter | |
| parent | netfilter: x_tables: unlock on error in xt_find_table_lock() (diff) | |
| parent | ipvs: explicitly forbid ipv6 service/dest creation if ipv6 mod is disabled (diff) | |
| download | linux-dev-1a41dbce0dedc2dbf136060f686e0c43d903b612.tar.xz linux-dev-1a41dbce0dedc2dbf136060f686e0c43d903b612.zip | |
Merge tag 'ipvs-fixes-for-v4.11' of http://git.kernel.org/pub/scm/linux/kernel/git/horms/ipvs
Simon Horman says:
====================
IPVS Fixes for v4.11
I would also like it considered for stable.
* Explicitly forbid ipv6 service/dest creation if ipv6 mod is disabled
to avoid oops caused by IPVS accesing IPv6 routing code in such
circumstances.
====================
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter')
| -rw-r--r-- | net/netfilter/ipvs/ip_vs_ctl.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c index 5aeb0dde6ccc..4d753beaac32 100644 --- a/net/netfilter/ipvs/ip_vs_ctl.c +++ b/net/netfilter/ipvs/ip_vs_ctl.c @@ -3078,6 +3078,17 @@ nla_put_failure: return skb->len; } +static bool ip_vs_is_af_valid(int af) +{ + if (af == AF_INET) + return true; +#ifdef CONFIG_IP_VS_IPV6 + if (af == AF_INET6 && ipv6_mod_enabled()) + return true; +#endif + return false; +} + static int ip_vs_genl_parse_service(struct netns_ipvs *ipvs, struct ip_vs_service_user_kern *usvc, struct nlattr *nla, int full_entry, @@ -3104,11 +3115,7 @@ static int ip_vs_genl_parse_service(struct netns_ipvs *ipvs, memset(usvc, 0, sizeof(*usvc)); usvc->af = nla_get_u16(nla_af); -#ifdef CONFIG_IP_VS_IPV6 - if (usvc->af != AF_INET && usvc->af != AF_INET6) -#else - if (usvc->af != AF_INET) -#endif + if (!ip_vs_is_af_valid(usvc->af)) return -EAFNOSUPPORT; if (nla_fwmark) { @@ -3610,6 +3617,11 @@ static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info) if (udest.af == 0) udest.af = svc->af; + if (!ip_vs_is_af_valid(udest.af)) { + ret = -EAFNOSUPPORT; + goto out; + } + if (udest.af != svc->af && cmd != IPVS_CMD_DEL_DEST) { /* The synchronization protocol is incompatible * with mixed family services |