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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/ipv6/route.c | |
| parent | 73f7ef435934e952c1d70d83d69921ea5d1f6bd4 (diff) | |
| download | linux-stable-464dc801c76aa0db88e16e8f5f47c6879858b9b2.tar.gz linux-stable-464dc801c76aa0db88e16e8f5f47c6879858b9b2.tar.bz2 linux-stable-464dc801c76aa0db88e16e8f5f47c6879858b9b2.zip | |
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/ipv6/route.c')
| -rw-r--r-- | net/ipv6/route.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 11249d211ea9..021a48e8a5e2 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -2989,6 +2989,10 @@ struct ctl_table * __net_init ipv6_route_sysctl_init(struct net *net) table[7].data = &net->ipv6.sysctl.ip6_rt_mtu_expires; table[8].data = &net->ipv6.sysctl.ip6_rt_min_advmss; table[9].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval; + + /* Don't export sysctls to unprivileged users */ + if (net->user_ns != &init_user_ns) + table[0].procname = NULL; } return table; |