[PATCH 07/11] capsicum: convert callers to use sockfd_lookupr() etc

From: David Drysdale
Date: Mon Jun 30 2014 - 06:32:01 EST

Convert places that use sockfd_lookup() functions to use the
equivalent sockfd_lookupr() variant instead.

Annotate each such call with an indication of what operations will
be performed on the retrieved socket, to allow future policing
of rights associated with file descriptors.

Signed-off-by: David Drysdale <drysdale@xxxxxxxxxx>
---
drivers/block/nbd.c | 3 +-
drivers/scsi/iscsi_tcp.c | 2 +-
drivers/staging/usbip/stub_dev.c | 2 +-
drivers/staging/usbip/vhci_sysfs.c | 2 +-
drivers/vhost/net.c | 2 +-
fs/ncpfs/inode.c | 5 +-
net/bluetooth/bnep/sock.c | 2 +-
net/bluetooth/cmtp/sock.c | 2 +-
net/bluetooth/hidp/sock.c | 4 +-
net/compat.c | 4 +-
net/l2tp/l2tp_core.c | 11 ++--
net/l2tp/l2tp_core.h | 2 +
net/sched/sch_atm.c | 2 +-
net/socket.c | 115 +++++++++++++++++++++++--------------
net/sunrpc/svcsock.c | 4 +-
15 files changed, 98 insertions(+), 64 deletions(-)

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index d6f55e3052fb..8439bbd1ad17 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -646,7 +646,8 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
int err;
if (nbd->sock)
return -EBUSY;
- sock = sockfd_lookup(arg, &err);
+ sock = sockfd_lookupr(arg, &err,
+ CAP_READ, CAP_WRITE, CAP_SHUTDOWN);
if (sock) {
nbd->sock = sock;
if (max_part > 0)
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 11854845393b..9354b333887c 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -652,7 +652,7 @@ iscsi_sw_tcp_conn_bind(struct iscsi_cls_session *cls_session,
int err;

/* lookup for existing socket */
- sock = sockfd_lookup((int)transport_eph, &err);
+ sock = sockfd_lookupr((int)transport_eph, &err, CAP_SOCK_SERVER);
if (!sock) {
iscsi_conn_printk(KERN_ERR, conn,
"sockfd_lookup failed %d\n", err);
diff --git a/drivers/staging/usbip/stub_dev.c b/drivers/staging/usbip/stub_dev.c
index de692d7011a5..3ac80c595343 100644
--- a/drivers/staging/usbip/stub_dev.c
+++ b/drivers/staging/usbip/stub_dev.c
@@ -108,7 +108,7 @@ static ssize_t store_sockfd(struct device *dev, struct device_attribute *attr,
goto err;
}

- socket = sockfd_lookup(sockfd, &err);
+ socket = sockfd_lookupr(sockfd, &err, CAP_LIST_END);
if (!socket)
goto err;

diff --git a/drivers/staging/usbip/vhci_sysfs.c b/drivers/staging/usbip/vhci_sysfs.c
index 211f43f67ea2..efe9d7625433 100644
--- a/drivers/staging/usbip/vhci_sysfs.c
+++ b/drivers/staging/usbip/vhci_sysfs.c
@@ -195,7 +195,7 @@ static ssize_t store_attach(struct device *dev, struct device_attribute *attr,
return -EINVAL;

/* Extract socket from fd. */
- socket = sockfd_lookup(sockfd, &err);
+ socket = sockfd_lookupr(sockfd, &err, CAP_LIST_END);
if (!socket)
return -EINVAL;

diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 6fed594f12d3..f4db0caf817d 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -838,7 +838,7 @@ static struct socket *get_raw_socket(int fd)
char buf[MAX_ADDR_LEN];
} uaddr;
int uaddr_len = sizeof uaddr, r;
- struct socket *sock = sockfd_lookup(fd, &r);
+ struct socket *sock = sockfd_lookupr(fd, &r, CAP_READ, CAP_WRITE);

if (!sock)
return ERR_PTR(-ENOTSOCK);
diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c
index e31e589369a4..580024e60d20 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -539,7 +539,7 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
if (!uid_valid(data.mounted_uid) || !uid_valid(data.uid) ||
!gid_valid(data.gid))
goto out;
- sock = sockfd_lookup(data.ncp_fd, &error);
+ sock = sockfd_lookupr(data.ncp_fd, &error, CAP_WRITE, CAP_FSTAT);
if (!sock)
goto out;

@@ -567,7 +567,8 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
server->ncp_sock = sock;

if (data.info_fd != -1) {
- struct socket *info_sock = sockfd_lookup(data.info_fd, &error);
+ struct socket *info_sock = sockfd_lookupr(data.info_fd, &error,
+ CAP_WRITE, CAP_FSTAT);
if (!info_sock)
goto out_bdi;
server->info_sock = info_sock;
diff --git a/net/bluetooth/bnep/sock.c b/net/bluetooth/bnep/sock.c
index 5f051290daba..1a69b6b05d2e 100644
--- a/net/bluetooth/bnep/sock.c
+++ b/net/bluetooth/bnep/sock.c
@@ -69,7 +69,7 @@ static int bnep_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long
if (copy_from_user(&ca, argp, sizeof(ca)))
return -EFAULT;

- nsock = sockfd_lookup(ca.sock, &err);
+ nsock = sockfd_lookupr(ca.sock, &err, CAP_READ, CAP_WRITE);
if (!nsock)
return err;

diff --git a/net/bluetooth/cmtp/sock.c b/net/bluetooth/cmtp/sock.c
index d82787d417bd..4033b771e6ca 100644
--- a/net/bluetooth/cmtp/sock.c
+++ b/net/bluetooth/cmtp/sock.c
@@ -83,7 +83,7 @@ static int cmtp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long
if (copy_from_user(&ca, argp, sizeof(ca)))
return -EFAULT;

- nsock = sockfd_lookup(ca.sock, &err);
+ nsock = sockfd_lookupr(ca.sock, &err, CAP_READ, CAP_WRITE);
if (!nsock)
return err;

diff --git a/net/bluetooth/hidp/sock.c b/net/bluetooth/hidp/sock.c
index cb3fdde1968a..85afd39595f3 100644
--- a/net/bluetooth/hidp/sock.c
+++ b/net/bluetooth/hidp/sock.c
@@ -67,11 +67,11 @@ static int hidp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long
if (copy_from_user(&ca, argp, sizeof(ca)))
return -EFAULT;

- csock = sockfd_lookup(ca.ctrl_sock, &err);
+ csock = sockfd_lookupr(ca.ctrl_sock, &err, CAP_READ, CAP_WRITE);
if (!csock)
return err;

- isock = sockfd_lookup(ca.intr_sock, &err);
+ isock = sockfd_lookupr(ca.intr_sock, &err, CAP_READ, CAP_WRITE);
if (!isock) {
sockfd_put(csock);
return err;
diff --git a/net/compat.c b/net/compat.c
index 9a76eaf63184..06655190173e 100644
--- a/net/compat.c
+++ b/net/compat.c
@@ -388,7 +388,7 @@ COMPAT_SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname,
char __user *, optval, unsigned int, optlen)
{
int err;
- struct socket *sock = sockfd_lookup(fd, &err);
+ struct socket *sock = sockfd_lookupr(fd, &err, CAP_SETSOCKOPT);

if (sock) {
err = security_socket_setsockopt(sock, level, optname);
@@ -508,7 +508,7 @@ COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname,
char __user *, optval, int __user *, optlen)
{
int err;
- struct socket *sock = sockfd_lookup(fd, &err);
+ struct socket *sock = sockfd_lookupr(fd, &err, CAP_GETSOCKOPT);

if (sock) {
err = security_socket_getsockopt(sock, level, optname);
diff --git a/net/l2tp/l2tp_core.c b/net/l2tp/l2tp_core.c
index a4e37d7158dc..64e6df42cfda 100644
--- a/net/l2tp/l2tp_core.c
+++ b/net/l2tp/l2tp_core.c
@@ -175,7 +175,8 @@ l2tp_session_id_hash_2(struct l2tp_net *pn, u32 session_id)
* owned by userspace. A struct sock returned from this function must be
* released using l2tp_tunnel_sock_put once you're done with it.
*/
-static struct sock *l2tp_tunnel_sock_lookup(struct l2tp_tunnel *tunnel)
+static struct sock *l2tp_tunnel_sock_lookup(struct l2tp_tunnel *tunnel,
+ struct capsicum_rights *rights)
{
int err = 0;
struct socket *sock = NULL;
@@ -189,7 +190,7 @@ static struct sock *l2tp_tunnel_sock_lookup(struct l2tp_tunnel *tunnel)
* of closing it. Look the socket up using the fd to ensure
* consistency.
*/
- sock = sockfd_lookup(tunnel->fd, &err);
+ sock = sockfd_lookup_rights(tunnel->fd, &err, rights);
if (sock)
sk = sock->sk;
} else {
@@ -1411,9 +1412,11 @@ static void l2tp_tunnel_del_work(struct work_struct *work)
struct l2tp_tunnel *tunnel = NULL;
struct socket *sock = NULL;
struct sock *sk = NULL;
+ struct capsicum_rights rights;

tunnel = container_of(work, struct l2tp_tunnel, del_work);
- sk = l2tp_tunnel_sock_lookup(tunnel);
+ sk = l2tp_tunnel_sock_lookup(tunnel,
+ cap_rights_init(&rights, CAP_SHUTDOWN));
if (!sk)
return;

@@ -1614,7 +1617,7 @@ int l2tp_tunnel_create(struct net *net, int fd, int version, u32 tunnel_id, u32
if (err < 0)
goto err;
} else {
- sock = sockfd_lookup(fd, &err);
+ sock = sockfd_lookupr(fd, &err, CAP_READ, CAP_WRITE);
if (!sock) {
pr_err("tunl %u: sockfd_lookup(fd=%d) returned %d\n",
tunnel_id, fd, err);
diff --git a/net/l2tp/l2tp_core.h b/net/l2tp/l2tp_core.h
index 3f93ccd6ba97..fd1e282d4e8a 100644
--- a/net/l2tp/l2tp_core.h
+++ b/net/l2tp/l2tp_core.h
@@ -11,6 +11,8 @@
#ifndef _L2TP_CORE_H_
#define _L2TP_CORE_H_

+#include <linux/capsicum.h>
+
/* Just some random numbers */
#define L2TP_TUNNEL_MAGIC 0x42114DDA
#define L2TP_SESSION_MAGIC 0x0C04EB7D
diff --git a/net/sched/sch_atm.c b/net/sched/sch_atm.c
index 8449b337f9e3..8131efa6d164 100644
--- a/net/sched/sch_atm.c
+++ b/net/sched/sch_atm.c
@@ -238,7 +238,7 @@ static int atm_tc_change(struct Qdisc *sch, u32 classid, u32 parent,
}
pr_debug("atm_tc_change: type %d, payload %d, hdr_len %d\n",
opt->nla_type, nla_len(opt), hdr_len);
- sock = sockfd_lookup(fd, &error);
+ sock = sockfd_lookupr(fd, &error, CAP_GETSOCKNAME);
if (!sock)
return error; /* f_count++ */
pr_debug("atm_tc_change: f_count %ld\n", file_count(sock->file));
diff --git a/net/socket.c b/net/socket.c
index f254e9bf9c4d..dbc00f0b992a 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -419,23 +419,6 @@ struct socket *sock_from_file(struct file *file, int *err)
}
EXPORT_SYMBOL(sock_from_file);

-static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed)
-{
- struct fd f = fdget(fd);
- struct socket *sock;
-
- *err = -EBADF;
- if (f.file) {
- sock = sock_from_file(f.file, err);
- if (likely(sock)) {
- *fput_needed = f.flags;
- return sock;
- }
- fdput(f);
- }
- return NULL;
-}
-
#ifdef CONFIG_SECURITY_CAPSICUM
struct socket *sockfd_lookup_rights(int fd, int *err,
struct capsicum_rights *rights)
@@ -506,6 +489,23 @@ struct socket *_sockfd_lookupr_light(int fd, int *err, int *fput_needed, ...)

#else

+static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed)
+{
+ struct fd f = fdget(fd);
+ struct socket *sock;
+
+ *err = -EBADF;
+ if (f.file) {
+ sock = sock_from_file(f.file, err);
+ if (likely(sock)) {
+ *fput_needed = f.flags;
+ return sock;
+ }
+ fdput(f);
+ }
+ return NULL;
+}
+
static inline struct socket *
sockfd_lookup_light_rights(int fd, int *err, int *fput_needed,
const struct capsicum_rights **actual_rights,
@@ -1608,7 +1608,7 @@ SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen)
struct sockaddr_storage address;
int err, fput_needed;

- sock = sockfd_lookup_light(fd, &err, &fput_needed);
+ sock = sockfd_lookupr_light(fd, &err, &fput_needed, CAP_BIND);
if (sock) {
err = move_addr_to_kernel(umyaddr, addrlen, &address);
if (err >= 0) {
@@ -1637,7 +1637,7 @@ SYSCALL_DEFINE2(listen, int, fd, int, backlog)
int err, fput_needed;
int somaxconn;

- sock = sockfd_lookup_light(fd, &err, &fput_needed);
+ sock = sockfd_lookupr_light(fd, &err, &fput_needed, CAP_LISTEN);
if (sock) {
somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn;
if ((unsigned int)backlog > somaxconn)
@@ -1671,6 +1671,8 @@ SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr,
struct file *newfile;
int err, len, newfd, fput_needed;
struct sockaddr_storage address;
+ struct capsicum_rights rights;
+ const struct capsicum_rights *listen_rights = NULL;

if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
return -EINVAL;
@@ -1678,7 +1680,9 @@ SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr,
if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK))
flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK;

- sock = sockfd_lookup_light(fd, &err, &fput_needed);
+ sock = sockfd_lookup_light_rights(fd, &err, &fput_needed,
+ &listen_rights,
+ cap_rights_init(&rights, CAP_ACCEPT));
if (!sock)
goto out;

@@ -1770,7 +1774,7 @@ SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr,
struct sockaddr_storage address;
int err, fput_needed;

- sock = sockfd_lookup_light(fd, &err, &fput_needed);
+ sock = sockfd_lookupr_light(fd, &err, &fput_needed, CAP_CONNECT);
if (!sock)
goto out;
err = move_addr_to_kernel(uservaddr, addrlen, &address);
@@ -1802,7 +1806,7 @@ SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr,
struct sockaddr_storage address;
int len, err, fput_needed;

- sock = sockfd_lookup_light(fd, &err, &fput_needed);
+ sock = sockfd_lookupr_light(fd, &err, &fput_needed, CAP_GETSOCKNAME);
if (!sock)
goto out;

@@ -1833,7 +1837,7 @@ SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr,
struct sockaddr_storage address;
int len, err, fput_needed;

- sock = sockfd_lookup_light(fd, &err, &fput_needed);
+ sock = sockfd_lookupr_light(fd, &err, &fput_needed, CAP_GETPEERNAME);
if (sock != NULL) {
err = security_socket_getpeername(sock);
if (err) {
@@ -1871,7 +1875,8 @@ SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len,

if (len > INT_MAX)
len = INT_MAX;
- sock = sockfd_lookup_light(fd, &err, &fput_needed);
+ sock = sockfd_lookupr_light(fd, &err, &fput_needed,
+ CAP_WRITE, addr ? CAP_CONNECT : 0ULL);
if (!sock)
goto out;

@@ -1930,7 +1935,7 @@ SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,

if (size > INT_MAX)
size = INT_MAX;
- sock = sockfd_lookup_light(fd, &err, &fput_needed);
+ sock = sockfd_lookupr_light(fd, &err, &fput_needed, CAP_READ);
if (!sock)
goto out;

@@ -1984,7 +1989,7 @@ SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname,
if (optlen < 0)
return -EINVAL;

- sock = sockfd_lookup_light(fd, &err, &fput_needed);
+ sock = sockfd_lookupr_light(fd, &err, &fput_needed, CAP_SETSOCKOPT);
if (sock != NULL) {
err = security_socket_setsockopt(sock, level, optname);
if (err)
@@ -2015,7 +2020,10 @@ SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname,
int err, fput_needed;
struct socket *sock;

- sock = sockfd_lookup_light(fd, &err, &fput_needed);
+ sock = sockfd_lookupr_light(fd, &err, &fput_needed, CAP_GETSOCKOPT,
+ (level == SOL_SCTP &&
+ optname == SCTP_SOCKOPT_PEELOFF)
+ ? CAP_PEELOFF : 0ULL);
if (sock != NULL) {
err = security_socket_getsockopt(sock, level, optname);
if (err)
@@ -2044,7 +2052,7 @@ SYSCALL_DEFINE2(shutdown, int, fd, int, how)
int err, fput_needed;
struct socket *sock;

- sock = sockfd_lookup_light(fd, &err, &fput_needed);
+ sock = sockfd_lookupr_light(fd, &err, &fput_needed, CAP_SHUTDOWN);
if (sock != NULL) {
err = security_socket_shutdown(sock, how);
if (!err)
@@ -2080,10 +2088,12 @@ static int copy_msghdr_from_user(struct msghdr *kmsg,
return 0;
}

-static int ___sys_sendmsg(struct socket *sock, struct msghdr __user *msg,
+static int ___sys_sendmsg(struct socket *sock_noaddr, struct socket *sock_addr,
+ struct msghdr __user *msg,
struct msghdr *msg_sys, unsigned int flags,
struct used_address *used_address)
{
+ struct socket *sock;
struct compat_msghdr __user *msg_compat =
(struct compat_msghdr __user *)msg;
struct sockaddr_storage address;
@@ -2103,6 +2113,9 @@ static int ___sys_sendmsg(struct socket *sock, struct msghdr __user *msg,
if (err)
return err;
}
+ sock = (msg_sys->msg_name ? sock_addr : sock_noaddr);
+ if (!sock)
+ return -EBADF;

if (msg_sys->msg_iovlen > UIO_FASTIOV) {
err = -EMSGSIZE;
@@ -2202,15 +2215,22 @@ long __sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags)
{
int fput_needed, err;
struct msghdr msg_sys;
- struct socket *sock;
-
- sock = sockfd_lookup_light(fd, &err, &fput_needed);
- if (!sock)
+ struct socket *sock_addr;
+ struct socket *sock_noaddr;
+
+ sock_addr = sockfd_lookupr_light(fd, &err, &fput_needed,
+ CAP_WRITE, CAP_CONNECT);
+ sock_noaddr = sock_addr;
+ if (!sock_noaddr)
+ sock_noaddr = sockfd_lookupr_light(fd, &err, &fput_needed,
+ CAP_WRITE);
+ if (!sock_noaddr)
goto out;

- err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL);
+ err = ___sys_sendmsg(sock_noaddr, sock_addr, msg, &msg_sys, flags,
+ NULL);

- fput_light(sock->file, fput_needed);
+ fput_light(sock_noaddr->file, fput_needed);
out:
return err;
}
@@ -2230,7 +2250,8 @@ int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
unsigned int flags)
{
int fput_needed, err, datagrams;
- struct socket *sock;
+ struct socket *sock_addr;
+ struct socket *sock_noaddr;
struct mmsghdr __user *entry;
struct compat_mmsghdr __user *compat_entry;
struct msghdr msg_sys;
@@ -2241,8 +2262,13 @@ int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,

datagrams = 0;

- sock = sockfd_lookup_light(fd, &err, &fput_needed);
- if (!sock)
+ sock_addr = sockfd_lookupr_light(fd, &err, &fput_needed,
+ CAP_WRITE, CAP_CONNECT);
+ sock_noaddr = sock_addr;
+ if (!sock_noaddr)
+ sock_noaddr = sockfd_lookupr_light(fd, &err, &fput_needed,
+ CAP_WRITE);
+ if (!sock_noaddr)
return err;

used_address.name_len = UINT_MAX;
@@ -2252,14 +2278,15 @@ int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,

while (datagrams < vlen) {
if (MSG_CMSG_COMPAT & flags) {
- err = ___sys_sendmsg(sock, (struct msghdr __user *)compat_entry,
- &msg_sys, flags, &used_address);
+ err = ___sys_sendmsg(sock_noaddr, sock_addr,
+ (struct msghdr __user *)compat_entry,
+ &msg_sys, flags, &used_address);
if (err < 0)
break;
err = __put_user(err, &compat_entry->msg_len);
++compat_entry;
} else {
- err = ___sys_sendmsg(sock,
+ err = ___sys_sendmsg(sock_noaddr, sock_addr,
(struct msghdr __user *)entry,
&msg_sys, flags, &used_address);
if (err < 0)
@@ -2273,7 +2300,7 @@ int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
++datagrams;
}

- fput_light(sock->file, fput_needed);
+ fput_light(sock_noaddr->file, fput_needed);

/* We only return an error if no datagrams were able to be sent */
if (datagrams != 0)
@@ -2392,7 +2419,7 @@ long __sys_recvmsg(int fd, struct msghdr __user *msg, unsigned flags)
struct msghdr msg_sys;
struct socket *sock;

- sock = sockfd_lookup_light(fd, &err, &fput_needed);
+ sock = sockfd_lookupr_light(fd, &err, &fput_needed, CAP_READ);
if (!sock)
goto out;

@@ -2432,7 +2459,7 @@ int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,

datagrams = 0;

- sock = sockfd_lookup_light(fd, &err, &fput_needed);
+ sock = sockfd_lookupr_light(fd, &err, &fput_needed, CAP_READ);
if (!sock)
return err;

diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 43bcb4699d69..9568b63b8aef 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -1400,7 +1400,7 @@ static struct svc_sock *svc_setup_socket(struct svc_serv *serv,
bool svc_alien_sock(struct net *net, int fd)
{
int err;
- struct socket *sock = sockfd_lookup(fd, &err);
+ struct socket *sock = sockfd_lookupr(fd, &err, CAP_LIST_END);
bool ret = false;

if (!sock)
@@ -1428,7 +1428,7 @@ int svc_addsock(struct svc_serv *serv, const int fd, char *name_return,
const size_t len)
{
int err = 0;
- struct socket *so = sockfd_lookup(fd, &err);
+ struct socket *so = sockfd_lookupr(fd, &err, CAP_LISTEN);
struct svc_sock *svsk = NULL;
struct sockaddr_storage addr;
struct sockaddr *sin = (struct sockaddr *)&addr;
--
2.0.0.526.g5318336

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