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To:     selinux@vger.kernel.org
Cc:     Serge Hallyn <serge@hallyn.com>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
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        David Ahern <dsahern@kernel.org>,
        Nikolay Aleksandrov <nikolay@nvidia.com>,
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        Oliver Hartkopp <socketcan@hartkopp.net>,
        Ziyang Xuan <william.xuanziyang@huawei.com>,
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        Menglong Dong <imagedong@tencent.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Richard Palethorpe <rpalethorpe@suse.com>,
        linux-security-module@vger.kernel.org,
        linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
        linux-wpan@vger.kernel.org
Subject: [PATCH v3 8/8] net: use new capable_any functionality
Date:   Wed, 15 Jun 2022 17:26:22 +0200
Message-Id: <20220615152623.311223-7-cgzones@googlemail.com>
In-Reply-To: <20220615152623.311223-1-cgzones@googlemail.com>
References: <20220502160030.131168-8-cgzones@googlemail.com>
 <20220615152623.311223-1-cgzones@googlemail.com>
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Use the new added capable_any function in appropriate cases, where a
task is required to have any of two capabilities.

Reorder CAP_SYS_ADMIN last.

Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
---
v3:
  - rename to capable_any()
  - make use of ns_capable_any
---
 net/caif/caif_socket.c   |  2 +-
 net/core/sock.c          | 12 ++++--------
 net/ieee802154/socket.c  |  6 ++----
 net/ipv4/ip_sockglue.c   |  3 +--
 net/ipv6/ipv6_sockglue.c |  3 +--
 net/unix/scm.c           |  2 +-
 6 files changed, 10 insertions(+), 18 deletions(-)

diff --git a/net/caif/caif_socket.c b/net/caif/caif_socket.c
index 251e666ba9a2..2d3df7658e04 100644
--- a/net/caif/caif_socket.c
+++ b/net/caif/caif_socket.c
@@ -1036,7 +1036,7 @@ static int caif_create(struct net *net, struct socket *sock, int protocol,
 		.usersize = sizeof_field(struct caifsock, conn_req.param)
 	};
 
-	if (!capable(CAP_SYS_ADMIN) && !capable(CAP_NET_ADMIN))
+	if (!capable_any(CAP_NET_ADMIN, CAP_SYS_ADMIN))
 		return -EPERM;
 	/*
 	 * The sock->type specifies the socket type to use.
diff --git a/net/core/sock.c b/net/core/sock.c
index 2ff40dd0a7a6..6b04301982d8 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1163,8 +1163,7 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
 
 	case SO_PRIORITY:
 		if ((val >= 0 && val <= 6) ||
-		    ns_capable(sock_net(sk)->user_ns, CAP_NET_RAW) ||
-		    ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
+		    ns_capable_any(sock_net(sk)->user_ns, CAP_NET_RAW, CAP_NET_ADMIN))
 			sk->sk_priority = val;
 		else
 			ret = -EPERM;
@@ -1309,8 +1308,7 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
 			clear_bit(SOCK_PASSSEC, &sock->flags);
 		break;
 	case SO_MARK:
-		if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_RAW) &&
-		    !ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) {
+		if (!ns_capable_any(sock_net(sk)->user_ns, CAP_NET_RAW, CAP_NET_ADMIN)) {
 			ret = -EPERM;
 			break;
 		}
@@ -1318,8 +1316,7 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
 		__sock_set_mark(sk, val);
 		break;
 	case SO_RCVMARK:
-		if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_RAW) &&
-		    !ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) {
+		if (!ns_capable_any(sock_net(sk)->user_ns, CAP_NET_RAW, CAP_NET_ADMIN)) {
 			ret = -EPERM;
 			break;
 		}
@@ -2680,8 +2677,7 @@ int __sock_cmsg_send(struct sock *sk, struct msghdr *msg, struct cmsghdr *cmsg,
 
 	switch (cmsg->cmsg_type) {
 	case SO_MARK:
-		if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_RAW) &&
-		    !ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
+		if (!ns_capable_any(sock_net(sk)->user_ns, CAP_NET_RAW, CAP_NET_ADMIN))
 			return -EPERM;
 		if (cmsg->cmsg_len != CMSG_LEN(sizeof(u32)))
 			return -EINVAL;
diff --git a/net/ieee802154/socket.c b/net/ieee802154/socket.c
index 718fb77bb372..882483602c27 100644
--- a/net/ieee802154/socket.c
+++ b/net/ieee802154/socket.c
@@ -894,8 +894,7 @@ static int dgram_setsockopt(struct sock *sk, int level, int optname,
 		ro->want_lqi = !!val;
 		break;
 	case WPAN_SECURITY:
-		if (!ns_capable(net->user_ns, CAP_NET_ADMIN) &&
-		    !ns_capable(net->user_ns, CAP_NET_RAW)) {
+		if (!ns_capable_any(net->user_ns, CAP_NET_RAW, CAP_NET_ADMIN)) {
 			err = -EPERM;
 			break;
 		}
@@ -918,8 +917,7 @@ static int dgram_setsockopt(struct sock *sk, int level, int optname,
 		}
 		break;
 	case WPAN_SECURITY_LEVEL:
-		if (!ns_capable(net->user_ns, CAP_NET_ADMIN) &&
-		    !ns_capable(net->user_ns, CAP_NET_RAW)) {
+		if (!ns_capable_any(net->user_ns, CAP_NET_RAW, CAP_NET_ADMIN)) {
 			err = -EPERM;
 			break;
 		}
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 445a9ecaefa1..2da0a450edf6 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -1339,8 +1339,7 @@ static int do_ip_setsockopt(struct sock *sk, int level, int optname,
 		break;
 
 	case IP_TRANSPARENT:
-		if (!!val && !ns_capable(sock_net(sk)->user_ns, CAP_NET_RAW) &&
-		    !ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) {
+		if (!!val && !ns_capable_any(sock_net(sk)->user_ns, CAP_NET_RAW, CAP_NET_ADMIN)) {
 			err = -EPERM;
 			break;
 		}
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 222f6bf220ba..25babd7ce844 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -634,8 +634,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 		break;
 
 	case IPV6_TRANSPARENT:
-		if (valbool && !ns_capable(net->user_ns, CAP_NET_RAW) &&
-		    !ns_capable(net->user_ns, CAP_NET_ADMIN)) {
+		if (valbool && !ns_capable_any(net->user_ns, CAP_NET_RAW, CAP_NET_ADMIN)) {
 			retv = -EPERM;
 			break;
 		}
diff --git a/net/unix/scm.c b/net/unix/scm.c
index aa27a02478dc..6c47baf04d7d 100644
--- a/net/unix/scm.c
+++ b/net/unix/scm.c
@@ -99,7 +99,7 @@ static inline bool too_many_unix_fds(struct task_struct *p)
 	struct user_struct *user = current_user();
 
 	if (unlikely(user->unix_inflight > task_rlimit(p, RLIMIT_NOFILE)))
-		return !capable(CAP_SYS_RESOURCE) && !capable(CAP_SYS_ADMIN);
+		return !capable_any(CAP_SYS_RESOURCE, CAP_SYS_ADMIN);
 	return false;
 }
 
-- 
2.36.1