From: Casey Schaufler <casey@schaufler-ca.com>
To: casey.schaufler@intel.com, jmorris@namei.org,
linux-security-module@vger.kernel.org, selinux@vger.kernel.org
Cc: casey@schaufler-ca.com, keescook@chromium.org,
john.johansen@canonical.com, penguin-kernel@i-love.sakura.ne.jp,
paul@paul-moore.com, sds@tycho.nsa.gov
Subject: [PATCH v3 20/24] LSM: security_secid_to_secctx in netlink netfilter
Date: Fri, 21 Jun 2019 11:52:29 -0700 [thread overview]
Message-ID: <20190621185233.6766-21-casey@schaufler-ca.com> (raw)
In-Reply-To: <20190621185233.6766-1-casey@schaufler-ca.com>
Change netlink netfilter interfaces to use lsmcontext
pointers, and remove scaffolding.
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
---
net/netfilter/nfnetlink_queue.c | 32 +++++++++++++-------------------
1 file changed, 13 insertions(+), 19 deletions(-)
diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
index 6da00c7add5b..69efb688383f 100644
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -305,12 +305,10 @@ static int nfqnl_put_sk_uidgid(struct sk_buff *skb, struct sock *sk)
return -1;
}
-static u32 nfqnl_get_sk_secctx(struct sk_buff *skb, char **secdata)
+static u32 nfqnl_get_sk_secctx(struct sk_buff *skb, struct lsmcontext *context)
{
- u32 seclen = 0;
#if IS_ENABLED(CONFIG_NETWORK_SECMARK)
struct lsmblob blob;
- struct lsmcontext context;
if (!skb || !sk_fullsock(skb->sk))
return 0;
@@ -318,15 +316,16 @@ static u32 nfqnl_get_sk_secctx(struct sk_buff *skb, char **secdata)
read_lock_bh(&skb->sk->sk_callback_lock);
if (skb->secmark) {
+ /* Any LSM might be looking for the secmark */
lsmblob_init(&blob, skb->secmark);
- security_secid_to_secctx(&blob, &context);
- *secdata = context.context;
+ security_secid_to_secctx(&blob, context);
}
read_unlock_bh(&skb->sk->sk_callback_lock);
- seclen = context.len;
+ return context->len;
+#else
+ return 0;
#endif
- return seclen;
}
static u32 nfqnl_get_bridge_size(struct nf_queue_entry *entry)
@@ -402,8 +401,7 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
enum ip_conntrack_info uninitialized_var(ctinfo);
struct nfnl_ct_hook *nfnl_ct;
bool csum_verify;
- struct lsmcontext scaff; /* scaffolding */
- char *secdata = NULL;
+ struct lsmcontext context;
u32 seclen = 0;
size = nlmsg_total_size(sizeof(struct nfgenmsg))
@@ -470,7 +468,7 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
}
if ((queue->flags & NFQA_CFG_F_SECCTX) && entskb->sk) {
- seclen = nfqnl_get_sk_secctx(entskb, &secdata);
+ seclen = nfqnl_get_sk_secctx(entskb, &context);
if (seclen)
size += nla_total_size(seclen);
}
@@ -605,7 +603,7 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
nfqnl_put_sk_uidgid(skb, entskb->sk) < 0)
goto nla_put_failure;
- if (seclen && nla_put(skb, NFQA_SECCTX, seclen, secdata))
+ if (seclen && nla_put(skb, NFQA_SECCTX, context.len, context.context))
goto nla_put_failure;
if (ct && nfnl_ct->build(skb, ct, ctinfo, NFQA_CT, NFQA_CT_INFO) < 0)
@@ -633,10 +631,8 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
}
nlh->nlmsg_len = skb->len;
- if (seclen) {
- lsmcontext_init(&scaff, secdata, seclen, 0);
- security_release_secctx(&scaff);
- }
+ if (seclen)
+ security_release_secctx(&context);
return skb;
nla_put_failure:
@@ -644,10 +640,8 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
kfree_skb(skb);
net_err_ratelimited("nf_queue: error creating packet message\n");
nlmsg_failure:
- if (seclen) {
- lsmcontext_init(&scaff, secdata, seclen, 0);
- security_release_secctx(&scaff);
- }
+ if (seclen)
+ security_release_secctx(&context);
return NULL;
}
--
2.20.1
next prev parent reply other threads:[~2019-06-21 18:53 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-21 18:52 [PATCH v3 00/24] LSM: Module stacking for AppArmor Casey Schaufler
2019-06-21 18:52 ` [PATCH v3 01/24] LSM: Infrastructure management of the superblock Casey Schaufler
2019-06-24 18:31 ` John Johansen
2019-06-21 18:52 ` [PATCH v3 02/24] LSM: Infrastructure management of the sock security Casey Schaufler
2019-06-24 18:33 ` John Johansen
2019-06-21 18:52 ` [PATCH v3 03/24] LSM: Infrastructure management of the key blob Casey Schaufler
2019-06-24 18:33 ` John Johansen
2019-06-21 18:52 ` [PATCH v3 04/24] LSM: Create and manage the lsmblob data structure Casey Schaufler
2019-06-22 22:42 ` Kees Cook
2019-06-24 18:38 ` John Johansen
2019-06-21 18:52 ` [PATCH v3 05/24] Use lsmblob in security_audit_rule_match Casey Schaufler
2019-06-22 22:43 ` Kees Cook
2019-06-24 18:39 ` John Johansen
2019-06-21 18:52 ` [PATCH v3 06/24] LSM: Use lsmblob in security_kernel_act_as Casey Schaufler
2019-06-22 22:43 ` Kees Cook
2019-06-24 18:38 ` John Johansen
2019-06-21 18:52 ` [PATCH v3 07/24] net: Prepare UDS for secuirty module stacking Casey Schaufler
2019-06-22 22:43 ` Kees Cook
2019-06-24 18:39 ` John Johansen
2019-06-21 18:52 ` [PATCH v3 08/24] LSM: Use lsmblob in security_secctx_to_secid Casey Schaufler
2019-06-22 22:44 ` Kees Cook
2019-06-24 18:38 ` John Johansen
2019-06-21 18:52 ` [PATCH v3 09/24] LSM: Use lsmblob in security_secid_to_secctx Casey Schaufler
2019-06-22 22:44 ` Kees Cook
2019-06-24 18:39 ` John Johansen
2019-06-21 18:52 ` [PATCH v3 10/24] Use lsmblob in security_ipc_getsecid Casey Schaufler
2019-06-22 22:48 ` Kees Cook
2019-06-24 16:39 ` Casey Schaufler
2019-06-24 17:20 ` Casey Schaufler
2019-06-24 21:09 ` Kees Cook
2019-06-24 18:39 ` John Johansen
2019-06-21 18:52 ` [PATCH v3 11/24] LSM: Use lsmblob in security_task_getsecid Casey Schaufler
2019-06-22 22:49 ` Kees Cook
2019-06-24 18:40 ` John Johansen
2019-06-21 18:52 ` [PATCH v3 12/24] LSM: Use lsmblob in security_inode_getsecid Casey Schaufler
2019-06-22 22:49 ` Kees Cook
2019-06-24 18:40 ` John Johansen
2019-06-21 18:52 ` [PATCH v3 13/24] LSM: Use lsmblob in security_cred_getsecid Casey Schaufler
2019-06-22 22:50 ` Kees Cook
2019-06-24 18:40 ` John Johansen
2019-06-21 18:52 ` [PATCH v3 14/24] IMA: Change internal interfaces to use lsmblobs Casey Schaufler
2019-06-22 22:51 ` Kees Cook
2019-06-24 18:40 ` John Johansen
2019-06-21 18:52 ` [PATCH v3 15/24] LSM: Specify which LSM to display Casey Schaufler
2019-06-22 22:51 ` Kees Cook
2019-06-24 18:48 ` John Johansen
2019-06-21 18:52 ` [PATCH v3 16/24] LSM: Ensure the correct LSM context releaser Casey Schaufler
2019-06-22 22:52 ` Kees Cook
2019-06-24 21:46 ` John Johansen
2019-06-21 18:52 ` [PATCH v3 17/24] LSM: Use lsmcontext in security_secid_to_secctx Casey Schaufler
2019-06-22 22:52 ` Kees Cook
2019-06-24 21:46 ` John Johansen
2019-06-21 18:52 ` [PATCH v3 18/24] LSM: Use lsmcontext in security_dentry_init_security Casey Schaufler
2019-06-22 22:54 ` Kees Cook
2019-06-24 21:46 ` John Johansen
2019-06-21 18:52 ` [PATCH v3 19/24] LSM: Use lsmcontext in security_inode_getsecctx Casey Schaufler
2019-06-22 22:56 ` Kees Cook
2019-06-24 21:46 ` John Johansen
2019-06-21 18:52 ` Casey Schaufler [this message]
2019-06-22 22:57 ` [PATCH v3 20/24] LSM: security_secid_to_secctx in netlink netfilter Kees Cook
2019-06-24 21:47 ` John Johansen
2019-06-21 18:52 ` [PATCH v3 21/24] Audit: Store LSM audit information in an lsmblob Casey Schaufler
2019-06-22 23:12 ` Kees Cook
2019-06-24 21:33 ` John Johansen
2019-06-25 1:01 ` Casey Schaufler
2019-06-25 1:46 ` Paul Moore
2019-06-25 2:14 ` John Johansen
2019-06-25 2:42 ` Paul Moore
2019-06-25 15:30 ` Casey Schaufler
2019-06-21 18:52 ` [PATCH v3 22/24] LSM: Return the lsmblob slot on initialization Casey Schaufler
2019-06-22 23:13 ` Kees Cook
2019-06-24 21:39 ` John Johansen
2019-06-24 21:50 ` Kees Cook
2019-06-24 21:53 ` Casey Schaufler
2019-06-24 21:47 ` John Johansen
2019-06-21 18:52 ` [PATCH v3 23/24] NET: Store LSM netlabel data in a lsmblob Casey Schaufler
2019-06-22 23:15 ` Kees Cook
2019-06-24 21:44 ` John Johansen
2019-06-21 18:52 ` [PATCH v3 24/24] AppArmor: Remove the exclusive flag Casey Schaufler
2019-06-22 23:15 ` Kees Cook
2019-06-24 21:45 ` John Johansen
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