diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2012-05-25 15:50:59 -0600 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2012-08-14 21:55:29 -0700 |
| commit | 8c6e2a941ae74d850a7bf0e5b3f4cd567e0f27dc (patch) | |
| tree | 4233dd4dbac8f2631ab792d521deb68ae3027c52 /net | |
| parent | a6c6796c7127de55cfa9bb0cfbb082ec0acd4eab (diff) | |
| download | linux-8c6e2a941ae74d850a7bf0e5b3f4cd567e0f27dc.tar.bz2 | |
userns: Convert xt_LOG to print socket kuids and kgids as uids and gids
xt_LOG always writes messages via sb_add via printk. Therefore when
xt_LOG logs the uid and gid of a socket a packet came from the
values should be converted to be in the initial user namespace.
Thus making xt_LOG as user namespace safe as possible.
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: Patrick McHardy <kaber@trash.net>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/xt_LOG.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/net/netfilter/xt_LOG.c b/net/netfilter/xt_LOG.c index ff5f75fddb15..02a2bf49dcbd 100644 --- a/net/netfilter/xt_LOG.c +++ b/net/netfilter/xt_LOG.c @@ -363,10 +363,12 @@ static void dump_ipv4_packet(struct sbuff *m, /* Max length: 15 "UID=4294967295 " */ if ((logflags & XT_LOG_UID) && !iphoff && skb->sk) { read_lock_bh(&skb->sk->sk_callback_lock); - if (skb->sk->sk_socket && skb->sk->sk_socket->file) + if (skb->sk->sk_socket && skb->sk->sk_socket->file) { + const struct cred *cred = skb->sk->sk_socket->file->f_cred; sb_add(m, "UID=%u GID=%u ", - skb->sk->sk_socket->file->f_cred->fsuid, - skb->sk->sk_socket->file->f_cred->fsgid); + from_kuid_munged(&init_user_ns, cred->fsuid), + from_kgid_munged(&init_user_ns, cred->fsgid)); + } read_unlock_bh(&skb->sk->sk_callback_lock); } @@ -719,10 +721,12 @@ static void dump_ipv6_packet(struct sbuff *m, /* Max length: 15 "UID=4294967295 " */ if ((logflags & XT_LOG_UID) && recurse && skb->sk) { read_lock_bh(&skb->sk->sk_callback_lock); - if (skb->sk->sk_socket && skb->sk->sk_socket->file) + if (skb->sk->sk_socket && skb->sk->sk_socket->file) { + const struct cred *cred = skb->sk->sk_socket->file->f_cred; sb_add(m, "UID=%u GID=%u ", - skb->sk->sk_socket->file->f_cred->fsuid, - skb->sk->sk_socket->file->f_cred->fsgid); + from_kuid_munged(&init_user_ns, cred->fsuid), + from_kgid_munged(&init_user_ns, cred->fsgid)); + } read_unlock_bh(&skb->sk->sk_callback_lock); } |