lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-Id: <20190522190743.15583-1-dsahern@kernel.org> Date: Wed, 22 May 2019 12:07:43 -0700 From: David Ahern <dsahern@...nel.org> To: davem@...emloft.net Cc: netdev@...r.kernel.org, David Ahern <dsahern@...il.com> Subject: [PATCH net-next] net: Set strict_start_type for routes and rules From: David Ahern <dsahern@...il.com> New userspace on an older kernel can send unknown and unsupported attributes resulting in an incompelete config which is almost always wrong for routing (few exceptions are passthrough settings like the protocol that installed the route). Set strict_start_type in the policies for IPv4 and IPv6 routes and rules to detect new, unsupported attributes and fail the route add. Signed-off-by: David Ahern <dsahern@...il.com> --- include/net/fib_rules.h | 1 + net/ipv4/fib_frontend.c | 1 + net/ipv6/route.c | 1 + 3 files changed, 3 insertions(+) diff --git a/include/net/fib_rules.h b/include/net/fib_rules.h index b473df5b9512..eba8465e1d86 100644 --- a/include/net/fib_rules.h +++ b/include/net/fib_rules.h @@ -103,6 +103,7 @@ struct fib_rule_notifier_info { }; #define FRA_GENERIC_POLICY \ + [FRA_UNSPEC] = { .strict_start_type = FRA_DPORT_RANGE + 1 }, \ [FRA_IIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \ [FRA_OIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \ [FRA_PRIORITY] = { .type = NLA_U32 }, \ diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c index b298255f6fdb..7325c0265c5b 100644 --- a/net/ipv4/fib_frontend.c +++ b/net/ipv4/fib_frontend.c @@ -645,6 +645,7 @@ int ip_rt_ioctl(struct net *net, unsigned int cmd, struct rtentry *rt) } const struct nla_policy rtm_ipv4_policy[RTA_MAX + 1] = { + [RTA_UNSPEC] = { .strict_start_type = RTA_DPORT + 1 }, [RTA_DST] = { .type = NLA_U32 }, [RTA_SRC] = { .type = NLA_U32 }, [RTA_IIF] = { .type = NLA_U32 }, diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 7a014ca877ed..c302a3832582 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -4221,6 +4221,7 @@ void rt6_mtu_change(struct net_device *dev, unsigned int mtu) } static const struct nla_policy rtm_ipv6_policy[RTA_MAX+1] = { + [RTA_UNSPEC] = { .strict_start_type = RTA_DPORT + 1 }, [RTA_GATEWAY] = { .len = sizeof(struct in6_addr) }, [RTA_PREFSRC] = { .len = sizeof(struct in6_addr) }, [RTA_OIF] = { .type = NLA_U32 }, -- 2.11.0
Powered by blists - more mailing lists