selinux: use GFP_ATOMIC under spin_lock

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>

diff --git a/security/selinux/xfrm.c b/security/selinux/xfrm.c
index 48665ecd119715359cc4ffa624afee5c4332dd57..8ab2951545170e6e81fb71fc7ee1e8cad5c2dd72 100644 (file)
--- 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;