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Diffstat (limited to 'net/socket.c')
-rw-r--r--net/socket.c132
1 files changed, 81 insertions, 51 deletions
diff --git a/net/socket.c b/net/socket.c
index 5061c5d2730c..6a9ab7a8b1d2 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* NET An implementation of the SOCKET network access protocol.
*
@@ -45,13 +46,6 @@
* Tigran Aivazian : Made listen(2) backlog sanity checks
* protocol-independent
*
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- *
* This module is effectively the top level interface to the BSD socket
* paradigm.
*
@@ -110,13 +104,6 @@
#include <net/busy_poll.h>
#include <linux/errqueue.h>
-/* proto_ops for ipv4 and ipv6 use the same {recv,send}msg function */
-#if IS_ENABLED(CONFIG_INET)
-#define INDIRECT_CALL_INET4(f, f1, ...) INDIRECT_CALL_1(f, f1, __VA_ARGS__)
-#else
-#define INDIRECT_CALL_INET4(f, f1, ...) f(__VA_ARGS__)
-#endif
-
#ifdef CONFIG_NET_RX_BUSY_POLL
unsigned int sysctl_net_busy_read __read_mostly;
unsigned int sysctl_net_busy_poll __read_mostly;
@@ -248,20 +235,13 @@ static struct kmem_cache *sock_inode_cachep __ro_after_init;
static struct inode *sock_alloc_inode(struct super_block *sb)
{
struct socket_alloc *ei;
- struct socket_wq *wq;
ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL);
if (!ei)
return NULL;
- wq = kmalloc(sizeof(*wq), GFP_KERNEL);
- if (!wq) {
- kmem_cache_free(sock_inode_cachep, ei);
- return NULL;
- }
- init_waitqueue_head(&wq->wait);
- wq->fasync_list = NULL;
- wq->flags = 0;
- ei->socket.wq = wq;
+ init_waitqueue_head(&ei->socket.wq.wait);
+ ei->socket.wq.fasync_list = NULL;
+ ei->socket.wq.flags = 0;
ei->socket.state = SS_UNCONNECTED;
ei->socket.flags = 0;
@@ -272,12 +252,11 @@ static struct inode *sock_alloc_inode(struct super_block *sb)
return &ei->vfs_inode;
}
-static void sock_destroy_inode(struct inode *inode)
+static void sock_free_inode(struct inode *inode)
{
struct socket_alloc *ei;
ei = container_of(inode, struct socket_alloc, vfs_inode);
- kfree_rcu(ei->socket.wq, rcu);
kmem_cache_free(sock_inode_cachep, ei);
}
@@ -302,7 +281,7 @@ static void init_inodecache(void)
static const struct super_operations sockfs_ops = {
.alloc_inode = sock_alloc_inode,
- .destroy_inode = sock_destroy_inode,
+ .free_inode = sock_free_inode,
.statfs = simple_statfs,
};
@@ -439,7 +418,7 @@ static int sock_map_fd(struct socket *sock, int flags)
}
newfile = sock_alloc_file(sock, flags, NULL);
- if (likely(!IS_ERR(newfile))) {
+ if (!IS_ERR(newfile)) {
fd_install(fd, newfile);
return fd;
}
@@ -616,7 +595,7 @@ static void __sock_release(struct socket *sock, struct inode *inode)
module_put(owner);
}
- if (sock->wq->fasync_list)
+ if (sock->wq.fasync_list)
pr_err("%s: fasync list not empty!\n", __func__);
if (!sock->file) {
@@ -649,24 +628,27 @@ void __sock_tx_timestamp(__u16 tsflags, __u8 *tx_flags)
}
EXPORT_SYMBOL(__sock_tx_timestamp);
-/**
- * sock_sendmsg - send a message through @sock
- * @sock: socket
- * @msg: message to send
- *
- * Sends @msg through @sock, passing through LSM.
- * Returns the number of bytes sent, or an error code.
- */
INDIRECT_CALLABLE_DECLARE(int inet_sendmsg(struct socket *, struct msghdr *,
size_t));
+INDIRECT_CALLABLE_DECLARE(int inet6_sendmsg(struct socket *, struct msghdr *,
+ size_t));
static inline int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg)
{
- int ret = INDIRECT_CALL_INET4(sock->ops->sendmsg, inet_sendmsg, sock,
- msg, msg_data_left(msg));
+ int ret = INDIRECT_CALL_INET(sock->ops->sendmsg, inet6_sendmsg,
+ inet_sendmsg, sock, msg,
+ msg_data_left(msg));
BUG_ON(ret == -EIOCBQUEUED);
return ret;
}
+/**
+ * sock_sendmsg - send a message through @sock
+ * @sock: socket
+ * @msg: message to send
+ *
+ * Sends @msg through @sock, passing through LSM.
+ * Returns the number of bytes sent, or an error code.
+ */
int sock_sendmsg(struct socket *sock, struct msghdr *msg)
{
int err = security_socket_sendmsg(sock, msg,
@@ -879,6 +861,18 @@ void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
}
EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops);
+INDIRECT_CALLABLE_DECLARE(int inet_recvmsg(struct socket *, struct msghdr *,
+ size_t, int));
+INDIRECT_CALLABLE_DECLARE(int inet6_recvmsg(struct socket *, struct msghdr *,
+ size_t, int));
+static inline int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg,
+ int flags)
+{
+ return INDIRECT_CALL_INET(sock->ops->recvmsg, inet6_recvmsg,
+ inet_recvmsg, sock, msg, msg_data_left(msg),
+ flags);
+}
+
/**
* sock_recvmsg - receive a message from @sock
* @sock: socket
@@ -888,15 +882,6 @@ EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops);
* Receives @msg from @sock, passing through LSM. Returns the total number
* of bytes received, or an error.
*/
-INDIRECT_CALLABLE_DECLARE(int inet_recvmsg(struct socket *, struct msghdr *,
- size_t , int ));
-static inline int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg,
- int flags)
-{
- return INDIRECT_CALL_INET4(sock->ops->recvmsg, inet_recvmsg, sock, msg,
- msg_data_left(msg), flags);
-}
-
int sock_recvmsg(struct socket *sock, struct msghdr *msg, int flags)
{
int err = security_socket_recvmsg(sock, msg, msg_data_left(msg), flags);
@@ -1299,13 +1284,12 @@ static int sock_fasync(int fd, struct file *filp, int on)
{
struct socket *sock = filp->private_data;
struct sock *sk = sock->sk;
- struct socket_wq *wq;
+ struct socket_wq *wq = &sock->wq;
if (sk == NULL)
return -EINVAL;
lock_sock(sk);
- wq = sock->wq;
fasync_helper(fd, filp, on, &wq->fasync_list);
if (!wq->fasync_list)
@@ -2061,6 +2045,8 @@ SYSCALL_DEFINE4(recv, int, fd, void __user *, ubuf, size_t, size,
static int __sys_setsockopt(int fd, int level, int optname,
char __user *optval, int optlen)
{
+ mm_segment_t oldfs = get_fs();
+ char *kernel_optval = NULL;
int err, fput_needed;
struct socket *sock;
@@ -2073,6 +2059,22 @@ static int __sys_setsockopt(int fd, int level, int optname,
if (err)
goto out_put;
+ err = BPF_CGROUP_RUN_PROG_SETSOCKOPT(sock->sk, &level,
+ &optname, optval, &optlen,
+ &kernel_optval);
+
+ if (err < 0) {
+ goto out_put;
+ } else if (err > 0) {
+ err = 0;
+ goto out_put;
+ }
+
+ if (kernel_optval) {
+ set_fs(KERNEL_DS);
+ optval = (char __user __force *)kernel_optval;
+ }
+
if (level == SOL_SOCKET)
err =
sock_setsockopt(sock, level, optname, optval,
@@ -2081,6 +2083,11 @@ static int __sys_setsockopt(int fd, int level, int optname,
err =
sock->ops->setsockopt(sock, level, optname, optval,
optlen);
+
+ if (kernel_optval) {
+ set_fs(oldfs);
+ kfree(kernel_optval);
+ }
out_put:
fput_light(sock->file, fput_needed);
}
@@ -2103,6 +2110,7 @@ static int __sys_getsockopt(int fd, int level, int optname,
{
int err, fput_needed;
struct socket *sock;
+ int max_optlen;
sock = sockfd_lookup_light(fd, &err, &fput_needed);
if (sock != NULL) {
@@ -2110,6 +2118,8 @@ static int __sys_getsockopt(int fd, int level, int optname,
if (err)
goto out_put;
+ max_optlen = BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN(optlen);
+
if (level == SOL_SOCKET)
err =
sock_getsockopt(sock, level, optname, optval,
@@ -2118,6 +2128,10 @@ static int __sys_getsockopt(int fd, int level, int optname,
err =
sock->ops->getsockopt(sock, level, optname, optval,
optlen);
+
+ err = BPF_CGROUP_RUN_PROG_GETSOCKOPT(sock->sk, level, optname,
+ optval, optlen,
+ max_optlen, err);
out_put:
fput_light(sock->file, fput_needed);
}
@@ -2212,9 +2226,10 @@ static int copy_msghdr_from_user(struct msghdr *kmsg,
kmsg->msg_iocb = NULL;
- return import_iovec(save_addr ? READ : WRITE,
+ err = import_iovec(save_addr ? READ : WRITE,
msg.msg_iov, msg.msg_iovlen,
UIO_FASTIOV, iov, &kmsg->msg_iter);
+ return err < 0 ? err : 0;
}
static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg,
@@ -2316,6 +2331,13 @@ out_freeiov:
/*
* BSD sendmsg interface
*/
+long __sys_sendmsg_sock(struct socket *sock, struct user_msghdr __user *msg,
+ unsigned int flags)
+{
+ struct msghdr msg_sys;
+
+ return ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL, 0);
+}
long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned int flags,
bool forbid_cmsg_compat)
@@ -2490,6 +2512,14 @@ out_freeiov:
* BSD recvmsg interface
*/
+long __sys_recvmsg_sock(struct socket *sock, struct user_msghdr __user *msg,
+ unsigned int flags)
+{
+ struct msghdr msg_sys;
+
+ return ___sys_recvmsg(sock, msg, &msg_sys, flags, 0);
+}
+
long __sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned int flags,
bool forbid_cmsg_compat)
{
generated by cgit (git 2.34.1) at 2025-04-30 09:53:40 +0000