linux-kernel - [GIT] SELinux xfrm kmalloc fix

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Date:	Tue, 19 Mar 2013 01:25:59 +1100 (EST)
From:	James Morris <jmorris@...ei.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
cc:	linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Dan Carpenter <dan.carpenter@...cle.com>,
	Eric Paris <eparis@...hat.com>
Subject: [GIT] SELinux xfrm kmalloc fix

Please apply.

The following changes since commit a937536b868b8369b98967929045f1df54234323:

  Linux 3.9-rc3 (2013-03-17 15:59:32 -0700)

are available in the git repository at:
  git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security.git for-linus

Dan Carpenter (1):
      selinux: use GFP_ATOMIC under spin_lock

 security/selinux/xfrm.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

commit 4502403dcf8f5c76abd4dbab8726c8e4ecb5cd34
Author: Dan Carpenter <dan.carpenter@...cle.com>
Date:   Sat Mar 16 12:48:11 2013 +0300

    selinux: use GFP_ATOMIC under spin_lock
    
    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@...cle.com>
    Cc: stable@...nel.org
    Signed-off-by: James Morris <james.l.morris@...cle.com>

diff --git a/security/selinux/xfrm.c b/security/selinux/xfrm.c
index 48665ec..8ab2951 100644
--- a/security/selinux/xfrm.c
+++ b/security/selinux/xfrm.c
@@ -310,7 +310,7 @@ int selinux_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
 
 	if (old_ctx) {
 		new_ctx = kmalloc(sizeof(*old_ctx) + old_ctx->ctx_len,
-				  GFP_KERNEL);
+				  GFP_ATOMIC);
 		if (!new_ctx)
 			return -ENOMEM;
 
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