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Message-Id: <20220615152623.311223-7-cgzones@googlemail.com>
Date: Wed, 15 Jun 2022 17:26:22 +0200
From: Christian Göttsche <cgzones@...glemail.com>
To: selinux@...r.kernel.org
Cc: Serge Hallyn <serge@...lyn.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Alexander Aring <alex.aring@...il.com>,
Stefan Schmidt <stefan@...enfreihafen.org>,
Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
David Ahern <dsahern@...nel.org>,
Nikolay Aleksandrov <nikolay@...dia.com>,
Stefano Garzarella <sgarzare@...hat.com>,
Oliver Hartkopp <socketcan@...tkopp.net>,
Ziyang Xuan <william.xuanziyang@...wei.com>,
Pavel Begunkov <asml.silence@...il.com>,
Wei Wang <weiwan@...gle.com>, Yangbo Lu <yangbo.lu@....com>,
Menglong Dong <imagedong@...cent.com>,
Thomas Gleixner <tglx@...utronix.de>,
Richard Palethorpe <rpalethorpe@...e.com>,
linux-security-module@...r.kernel.org,
linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
linux-wpan@...r.kernel.org
Subject: [PATCH v3 8/8] net: use new capable_any functionality
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@...glemail.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
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