diff options
| author | Guillaume Nault <gnault@redhat.com> | 2022-10-13 16:37:47 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2022-10-19 08:46:48 +0200 |
| commit | 1fcc064b305a1aadeff0d4bff961094d27660acd (patch) | |
| tree | 8dcb7515e4d412cc7787785dcdcb1339f0f2d7c7 /net/ipv6/netfilter/ip6t_rpfilter.c | |
| parent | 1ca695207ed2271ecbf8ee6c641970f621c157cc (diff) | |
netfilter: rpfilter/fib: Set ->flowic_uid correctly for user namespaces.
Currently netfilter's rpfilter and fib modules implicitely initialise
->flowic_uid with 0. This is normally the root UID. However, this isn't
the case in user namespaces, where user ID 0 is mapped to a different
kernel UID. By initialising ->flowic_uid with sock_net_uid(), we get
the root UID of the user namespace, thus keeping the same behaviour
whether or not we're running in a user namepspace.
Note, this is similar to commit 8bcfd0925ef1 ("ipv4: add missing
initialization for flowi4_uid"), which fixed the rp_filter sysctl.
Fixes: 622ec2c9d524 ("net: core: add UID to flows, rules, and routes")
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/ipv6/netfilter/ip6t_rpfilter.c')
| -rw-r--r-- | net/ipv6/netfilter/ip6t_rpfilter.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv6/netfilter/ip6t_rpfilter.c b/net/ipv6/netfilter/ip6t_rpfilter.c index 69d86b040a6a..a01d9b842bd0 100644 --- a/net/ipv6/netfilter/ip6t_rpfilter.c +++ b/net/ipv6/netfilter/ip6t_rpfilter.c @@ -40,6 +40,7 @@ static bool rpfilter_lookup_reverse6(struct net *net, const struct sk_buff *skb, .flowi6_l3mdev = l3mdev_master_ifindex_rcu(dev), .flowlabel = (* (__be32 *) iph) & IPV6_FLOWINFO_MASK, .flowi6_proto = iph->nexthdr, + .flowi6_uid = sock_net_uid(net, NULL), .daddr = iph->saddr, }; int lookup_flags; |