path: root/net/key
diff options
authorNikolay Aleksandrov <nikolay@redhat.com>2014-03-07 12:44:19 +0100
committerSteffen Klassert <steffen.klassert@secunet.com>2014-03-10 08:30:02 +0100
commit52a4c6404f91f2d2c5592ee6365a8418c4565f53 (patch)
treec88320060de9b18fbe345a46dc9d91eecb92dde9 /net/key
parent87536a81e1f52409b45333ce8cac415a1218163c (diff)
selinux: add gfp argument to security_xfrm_policy_alloc and fix callers
security_xfrm_policy_alloc can be called in atomic context so the allocation should be done with GFP_ATOMIC. Add an argument to let the callers choose the appropriate way. In order to do so a gfp argument needs to be added to the method xfrm_policy_alloc_security in struct security_operations and to the internal function selinux_xfrm_alloc_user. After that switch to GFP_ATOMIC in the atomic callers and leave GFP_KERNEL as before for the rest. The path that needed the gfp argument addition is: security_xfrm_policy_alloc -> security_ops.xfrm_policy_alloc_security -> all users of xfrm_policy_alloc_security (e.g. selinux_xfrm_policy_alloc) -> selinux_xfrm_alloc_user (here the allocation used to be GFP_KERNEL only) Now adding a gfp argument to selinux_xfrm_alloc_user requires us to also add it to security_context_to_sid which is used inside and prior to this patch did only GFP_KERNEL allocation. So add gfp argument to security_context_to_sid and adjust all of its callers as well. CC: Paul Moore <paul@paul-moore.com> CC: Dave Jones <davej@redhat.com> CC: Steffen Klassert <steffen.klassert@secunet.com> CC: Fan Du <fan.du@windriver.com> CC: David S. Miller <davem@davemloft.net> CC: LSM list <linux-security-module@vger.kernel.org> CC: SELinux list <selinux@tycho.nsa.gov> Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com> Acked-by: Paul Moore <paul@paul-moore.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/key')
1 files changed, 3 insertions, 3 deletions
diff --git a/net/key/af_key.c b/net/key/af_key.c
index 1526023f99ed..79326978517a 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -2239,7 +2239,7 @@ static int pfkey_spdadd(struct sock *sk, struct sk_buff *skb, const struct sadb_
goto out;
- err = security_xfrm_policy_alloc(&xp->security, uctx);
+ err = security_xfrm_policy_alloc(&xp->security, uctx, GFP_KERNEL);
if (err)
@@ -2341,7 +2341,7 @@ static int pfkey_spddelete(struct sock *sk, struct sk_buff *skb, const struct sa
if (!uctx)
return -ENOMEM;
- err = security_xfrm_policy_alloc(&pol_ctx, uctx);
+ err = security_xfrm_policy_alloc(&pol_ctx, uctx, GFP_KERNEL);
if (err)
return err;
@@ -3241,7 +3241,7 @@ static struct xfrm_policy *pfkey_compile_policy(struct sock *sk, int opt,
if ((*dir = verify_sec_ctx_len(p)))
goto out;
uctx = pfkey_sadb2xfrm_user_sec_ctx(sec_ctx, GFP_ATOMIC);
- *dir = security_xfrm_policy_alloc(&xp->security, uctx);
+ *dir = security_xfrm_policy_alloc(&xp->security, uctx, GFP_ATOMIC);
if (*dir)

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