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 <tyhi...@canonical.com> --- net/sysctl_net.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/sysctl_net.c b/net/sysctl_net.c index ed98c1f..46a71c7 100644 --- a/net/sysctl_net.c +++ b/net/sysctl_net.c @@ -46,7 +46,7 @@ static int net_ctl_permissions(struct ctl_table_header *head, kgid_t root_gid = make_kgid(net->user_ns, 0); /* 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) || uid_eq(root_uid, current_euid())) { int mode = (table->mode >> 6) & 7; return (mode << 6) | (mode << 3) | mode; -- 2.7.4
