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authorTyler Hicks <tyhicks@canonical.com>2016-10-01 01:24:31 +0300
committerDavid S. Miller <davem@davemloft.net>2016-10-01 10:24:28 +0300
commitd6169b0206db1c8c8d0e4c6b79fdf4b2fc6455f1 (patch)
tree66afc6f21934251d8a661176cf4c33c5743f903b /net
parent803783849fed11e38a30f31932c02c815520da70 (diff)
downloadlinux-d6169b0206db1c8c8d0e4c6b79fdf4b2fc6455f1.tar.xz
net: Use ns_capable_noaudit() when determining net sysctl permissions
The capability check should not be audited since it is only being used to determine the inode permissions. A failed check does not indicate a violation of security policy but, when an LSM is enabled, a denial audit message was being generated. The denial audit message caused confusion for some application authors because root-running Go applications always triggered the denial. To prevent this confusion, the capability check in net_ctl_permissions() is switched to the noaudit variant. BugLink: https://launchpad.net/bugs/1465724 Signed-off-by: Tyler Hicks <tyhicks@canonical.com> Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com> Signed-off-by: James Morris <james.l.morris@oracle.com> [dtor: reapplied after e79c6a4fc923 ("net: make net namespace sysctls belong to container's owner") accidentally reverted the change.] Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/sysctl_net.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sysctl_net.c b/net/sysctl_net.c
index 5bc1a3d57401..e0c71bd8f7cf 100644
--- a/net/sysctl_net.c
+++ b/net/sysctl_net.c
@@ -44,7 +44,7 @@ static int net_ctl_permissions(struct ctl_table_header *head,
struct net *net = container_of(head->set, struct net, sysctls);
/* Allow network administrator to have same access as root. */
- if (ns_capable(net->user_ns, CAP_NET_ADMIN)) {
+ if (ns_capable_noaudit(net->user_ns, CAP_NET_ADMIN)) {
int mode = (table->mode >> 6) & 7;
return (mode << 6) | (mode << 3) | mode;
}