Linux 4.14.95

[thirdparty/kernel/stable-queue.git] / releases / 3.8.4 / selinux-use-gfp_atomic-under-spin_lock.patch

From 4502403dcf8f5c76abd4dbab8726c8e4ecb5cd34 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Sat, 16 Mar 2013 12:48:11 +0300
Subject: selinux: use GFP_ATOMIC under spin_lock

From: Dan Carpenter <dan.carpenter@oracle.com>

commit 4502403dcf8f5c76abd4dbab8726c8e4ecb5cd34 upstream.

The call tree here is:

sk_clone_lock()              <- takes bh_lock_sock(newsk);
xfrm_sk_clone_policy()
__xfrm_sk_clone_policy()
clone_policy()               <- uses GFP_ATOMIC for allocations
security_xfrm_policy_clone()
security_ops->xfrm_policy_clone_security()
selinux_xfrm_policy_clone()

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 security/selinux/xfrm.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/security/selinux/xfrm.c
+++ b/security/selinux/xfrm.c
@@ -310,7 +310,7 @@ int selinux_xfrm_policy_clone(struct xfr
 
 	if (old_ctx) {
 		new_ctx = kmalloc(sizeof(*old_ctx) + old_ctx->ctx_len,
-				  GFP_KERNEL);
+				  GFP_ATOMIC);
 		if (!new_ctx)
 			return -ENOMEM;