From: Arnd Bergmann <arnd@arndb.de>
To: John Johansen <john.johansen@canonical.com>,
James Morris <jmorris@namei.org>,
"Serge E. Hallyn" <serge@hallyn.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
David Howells <dhowells@redhat.com>, Jann Horn <jannh@google.com>,
Matthew Garrett <mjg59@google.com>,
linux-security-module@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] apparmor: add #ifdef checks for secmark filtering
Date: Fri, 5 Oct 2018 18:11:47 +0200 [thread overview]
Message-ID: <20181005161206.727098-1-arnd@arndb.de> (raw)
The newly added code fails to build when either SECMARK or
NETFILTER are disabled:
security/apparmor/lsm.c: In function 'apparmor_socket_sock_rcv_skb':
security/apparmor/lsm.c:1138:12: error: 'struct sk_buff' has no member named 'secmark'; did you mean 'mark'?
security/apparmor/lsm.c:1671:21: error: 'struct nf_hook_state' declared inside parameter list will not be visible outside of this definition or declaration [-Werror]
Add a set of #ifdef checks around it to only enable the code that
we can compile and that makes sense in that configuration.
Fixes: ab9f2115081a ("apparmor: Allow filtering based on secmark policy")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
security/apparmor/lsm.c | 10 ++++++++++
security/apparmor/net.c | 2 ++
2 files changed, 12 insertions(+)
diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c
index 53201013c40e..b74b724d3e84 100644
--- a/security/apparmor/lsm.c
+++ b/security/apparmor/lsm.c
@@ -1123,6 +1123,7 @@ static int apparmor_socket_shutdown(struct socket *sock, int how)
return aa_sock_perm(OP_SHUTDOWN, AA_MAY_SHUTDOWN, sock);
}
+#ifdef CONFIG_NETWORK_SECMARK
/**
* apparmor_socket_sock_recv_skb - check perms before associating skb to sk
*
@@ -1141,6 +1142,7 @@ static int apparmor_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
return apparmor_secmark_check(ctx->label, OP_RECVMSG, AA_MAY_RECEIVE,
skb->secmark, sk);
}
+#endif
static struct aa_label *sk_peer_label(struct sock *sk)
@@ -1235,6 +1237,7 @@ static void apparmor_sock_graft(struct sock *sk, struct socket *parent)
ctx->label = aa_get_current_label();
}
+#ifdef CONFIG_NETWORK_SECMARK
static int apparmor_inet_conn_request(struct sock *sk, struct sk_buff *skb,
struct request_sock *req)
{
@@ -1246,6 +1249,7 @@ static int apparmor_inet_conn_request(struct sock *sk, struct sk_buff *skb,
return apparmor_secmark_check(ctx->label, OP_CONNECT, AA_MAY_CONNECT,
skb->secmark, sk);
}
+#endif
static struct security_hook_list apparmor_hooks[] __lsm_ro_after_init = {
LSM_HOOK_INIT(ptrace_access_check, apparmor_ptrace_access_check),
@@ -1304,13 +1308,17 @@ static struct security_hook_list apparmor_hooks[] __lsm_ro_after_init = {
LSM_HOOK_INIT(socket_getsockopt, apparmor_socket_getsockopt),
LSM_HOOK_INIT(socket_setsockopt, apparmor_socket_setsockopt),
LSM_HOOK_INIT(socket_shutdown, apparmor_socket_shutdown),
+#ifdef CONFIG_NETWORK_SECMARK
LSM_HOOK_INIT(socket_sock_rcv_skb, apparmor_socket_sock_rcv_skb),
+#endif
LSM_HOOK_INIT(socket_getpeersec_stream,
apparmor_socket_getpeersec_stream),
LSM_HOOK_INIT(socket_getpeersec_dgram,
apparmor_socket_getpeersec_dgram),
LSM_HOOK_INIT(sock_graft, apparmor_sock_graft),
+#ifdef CONFIG_NETWORK_SECMARK
LSM_HOOK_INIT(inet_conn_request, apparmor_inet_conn_request),
+#endif
LSM_HOOK_INIT(cred_alloc_blank, apparmor_cred_alloc_blank),
LSM_HOOK_INIT(cred_free, apparmor_cred_free),
@@ -1666,6 +1674,7 @@ static inline int apparmor_init_sysctl(void)
}
#endif /* CONFIG_SYSCTL */
+#if defined(CONFIG_NETFILTER) && defined(CONFIG_NETWORK_SECMARK)
static unsigned int apparmor_ip_postroute(void *priv,
struct sk_buff *skb,
const struct nf_hook_state *state)
@@ -1754,6 +1763,7 @@ static int __init apparmor_nf_ip_init(void)
return 0;
}
__initcall(apparmor_nf_ip_init);
+#endif
static int __init apparmor_init(void)
{
diff --git a/security/apparmor/net.c b/security/apparmor/net.c
index f9a678ce994f..c07fde444792 100644
--- a/security/apparmor/net.c
+++ b/security/apparmor/net.c
@@ -190,6 +190,7 @@ int aa_sock_file_perm(struct aa_label *label, const char *op, u32 request,
return aa_label_sk_perm(label, op, request, sock->sk);
}
+#ifdef CONFIG_NETWORK_SECMARK
static int apparmor_secmark_init(struct aa_secmark *secmark)
{
struct aa_label *label;
@@ -254,3 +255,4 @@ int apparmor_secmark_check(struct aa_label *label, char *op, u32 request,
aa_secmark_perm(profile, request, secid,
&sa, sk));
}
+#endif
--
2.18.0
next reply other threads:[~2018-10-05 16:12 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-05 16:11 Arnd Bergmann [this message]
2018-10-05 21:56 ` [PATCH] apparmor: add #ifdef checks for secmark filtering John Johansen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20181005161206.727098-1-arnd@arndb.de \
--to=arnd@arndb.de \
--cc=dhowells@redhat.com \
--cc=jannh@google.com \
--cc=jmorris@namei.org \
--cc=john.johansen@canonical.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-security-module@vger.kernel.org \
--cc=mjg59@google.com \
--cc=serge@hallyn.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).