Commit 08382c9f authored Nov 03, 2016 by jooseong lee Committed by Casey Schaufler Nov 04, 2016

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 <jooseong.lee@samsung.com>
Acked-by: Casey Schaufler <casey@schaufler-ca.com>

parent 07d9a380

security/smack/smack_lsm.c

+10 −2

Original line number	Diff line number	Diff line
		@@ -2337,8 +2337,16 @@ static int smack_sk_alloc_security(struct sock *sk, int family, gfp_t gfp_flags)
		if (ssp == NULL)
		return -ENOMEM;

		/*
		* 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;

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