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| author | Eric W. Biederman <ebiederm@xmission.com> | 2012-11-16 03:02:59 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-11-18 20:30:55 -0500 |
| commit | 464dc801c76aa0db88e16e8f5f47c6879858b9b2 (patch) | |
| tree | cfaf0f43f4ce50669f07031ec42062b4c9a7f985 /net/netfilter/nf_conntrack_timestamp.c | |
| parent | 73f7ef435934e952c1d70d83d69921ea5d1f6bd4 (diff) | |
| download | linux-464dc801c76aa0db88e16e8f5f47c6879858b9b2.tar.gz | |
net: Don't export sysctls to unprivileged users
In preparation for supporting the creation of network namespaces
by unprivileged users, modify all of the per net sysctl exports
and refuse to allow them to unprivileged users.
This makes it safe for unprivileged users in general to access
per net sysctls, and allows sysctls to be exported to unprivileged
users on an individual basis as they are deemed safe.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netfilter/nf_conntrack_timestamp.c')
| -rw-r--r-- | net/netfilter/nf_conntrack_timestamp.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/netfilter/nf_conntrack_timestamp.c b/net/netfilter/nf_conntrack_timestamp.c index dbb364f62d6f03..7ea8026f07c9c8 100644 --- a/net/netfilter/nf_conntrack_timestamp.c +++ b/net/netfilter/nf_conntrack_timestamp.c @@ -51,6 +51,10 @@ static int nf_conntrack_tstamp_init_sysctl(struct net *net) table[0].data = &net->ct.sysctl_tstamp; + /* Don't export sysctls to unprivileged users */ + if (net->user_ns != &init_user_ns) + table[0].procname = NULL; + net->ct.tstamp_sysctl_header = register_net_sysctl(net, "net/netfilter", table); if (!net->ct.tstamp_sysctl_header) { |