From 08382c9f6efe08b8bb30645c2744480cbd8f161a Mon Sep 17 00:00:00 2001 From: jooseong lee Date: Thu, 3 Nov 2016 11:54:39 +0100 Subject: Smack: Assign smack_known_web label for kernel thread's Assign smack_known_web label for kernel thread's socket Creating struct sock by sk_alloc function in various kernel subsystems like bluetooth doesn't call smack_socket_post_create(). In such case, received sock label is the floor('_') label and makes access deny. Signed-off-by: jooseong lee Acked-by: Casey Schaufler --- security/smack/smack_lsm.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) (limited to 'security') diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index 1cb060293505..e73460d5acc6 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -2337,8 +2337,16 @@ static int smack_sk_alloc_security(struct sock *sk, int family, gfp_t gfp_flags) if (ssp == NULL) return -ENOMEM; - ssp->smk_in = skp; - ssp->smk_out = skp; + /* + * Sockets created by kernel threads receive web label. + */ + if (unlikely(current->flags & PF_KTHREAD)) { + ssp->smk_in = &smack_known_web; + ssp->smk_out = &smack_known_web; + } else { + ssp->smk_in = skp; + ssp->smk_out = skp; + } ssp->smk_packet = NULL; sk->sk_security = ssp; -- cgit v1.2.3-59-g8ed1b