summaryrefslogtreecommitdiff
path: root/net/socket.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/socket.c')
-rw-r--r--net/socket.c68
1 files changed, 57 insertions, 11 deletions
diff --git a/net/socket.c b/net/socket.c
index 73dc69f9681e..985ef06792d6 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -90,7 +90,7 @@
#include <linux/slab.h>
#include <linux/xattr.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include <asm/unistd.h>
#include <net/compat.h>
@@ -287,7 +287,7 @@ static void init_once(void *foo)
inode_init_once(&ei->vfs_inode);
}
-static int init_inodecache(void)
+static void init_inodecache(void)
{
sock_inode_cachep = kmem_cache_create("sock_inode_cache",
sizeof(struct socket_alloc),
@@ -296,9 +296,7 @@ static int init_inodecache(void)
SLAB_RECLAIM_ACCOUNT |
SLAB_MEM_SPREAD | SLAB_ACCOUNT),
init_once);
- if (sock_inode_cachep == NULL)
- return -ENOMEM;
- return 0;
+ BUG_ON(sock_inode_cachep == NULL);
}
static const struct super_operations sockfs_ops = {
@@ -533,8 +531,22 @@ static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer,
return used;
}
+static int sockfs_setattr(struct dentry *dentry, struct iattr *iattr)
+{
+ int err = simple_setattr(dentry, iattr);
+
+ if (!err && (iattr->ia_valid & ATTR_UID)) {
+ struct socket *sock = SOCKET_I(d_inode(dentry));
+
+ sock->sk->sk_uid = iattr->ia_uid;
+ }
+
+ return err;
+}
+
static const struct inode_operations sockfs_inode_ops = {
.listxattr = sockfs_listxattr,
+ .setattr = sockfs_setattr,
};
/**
@@ -640,6 +652,16 @@ int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
}
EXPORT_SYMBOL(kernel_sendmsg);
+static bool skb_is_err_queue(const struct sk_buff *skb)
+{
+ /* pkt_type of skbs enqueued on the error queue are set to
+ * PACKET_OUTGOING in skb_set_err_queue(). This is only safe to do
+ * in recvmsg, since skbs received on a local socket will never
+ * have a pkt_type of PACKET_OUTGOING.
+ */
+ return skb->pkt_type == PACKET_OUTGOING;
+}
+
/*
* called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP)
*/
@@ -654,7 +676,7 @@ void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
/* Race occurred between timestamp enabling and packet
receiving. Fill in the current time for now. */
- if (need_software_tstamp && skb->tstamp.tv64 == 0)
+ if (need_software_tstamp && skb->tstamp == 0)
__net_timestamp(skb);
if (need_software_tstamp) {
@@ -679,9 +701,15 @@ void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
(sk->sk_tsflags & SOF_TIMESTAMPING_RAW_HARDWARE) &&
ktime_to_timespec_cond(shhwtstamps->hwtstamp, tss.ts + 2))
empty = 0;
- if (!empty)
+ if (!empty) {
put_cmsg(msg, SOL_SOCKET,
SCM_TIMESTAMPING, sizeof(tss), &tss);
+
+ if (skb_is_err_queue(skb) && skb->len &&
+ SKB_EXT_ERR(skb)->opt_stats)
+ put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPING_OPT_STATS,
+ skb->len, skb->data);
+ }
}
EXPORT_SYMBOL_GPL(__sock_recv_timestamp);
@@ -892,6 +920,11 @@ static long sock_do_ioctl(struct net *net, struct socket *sock,
* what to do with it - that's up to the protocol still.
*/
+static struct ns_common *get_net_ns(struct ns_common *ns)
+{
+ return &get_net(container_of(ns, struct net, ns))->ns;
+}
+
static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg)
{
struct socket *sock;
@@ -960,6 +993,13 @@ static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg)
err = dlci_ioctl_hook(cmd, argp);
mutex_unlock(&dlci_ioctl_mutex);
break;
+ case SIOCGSKNS:
+ err = -EPERM;
+ if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
+ break;
+
+ err = open_related_ns(&net->ns, get_net_ns);
+ break;
default:
err = sock_do_ioctl(net, sock, cmd, arg);
break;
@@ -1477,7 +1517,7 @@ SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr,
if (err)
goto out_fd;
- err = sock->ops->accept(sock, newsock, sock->file->f_flags);
+ err = sock->ops->accept(sock, newsock, sock->file->f_flags, false);
if (err < 0)
goto out_fd;
@@ -1702,6 +1742,7 @@ SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
/* We assume all kernel code knows the size of sockaddr_storage */
msg.msg_namelen = 0;
msg.msg_iocb = NULL;
+ msg.msg_flags = 0;
if (sock->file->f_flags & O_NONBLOCK)
flags |= MSG_DONTWAIT;
err = sock_recvmsg(sock, &msg, flags);
@@ -1887,7 +1928,7 @@ static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg,
struct sockaddr_storage address;
struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
unsigned char ctl[sizeof(struct cmsghdr) + 20]
- __attribute__ ((aligned(sizeof(__kernel_size_t))));
+ __aligned(sizeof(__kernel_size_t));
/* 20 is size of ipv6_pktinfo */
unsigned char *ctl_buf = ctl;
int ctl_len;
@@ -1917,6 +1958,8 @@ static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg,
ctl_buf = msg_sys->msg_control;
ctl_len = msg_sys->msg_controllen;
} else if (ctl_len) {
+ BUILD_BUG_ON(sizeof(struct cmsghdr) !=
+ CMSG_ALIGN(sizeof(struct cmsghdr)));
if (ctl_len > sizeof(ctl)) {
ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL);
if (ctl_buf == NULL)
@@ -2197,8 +2240,10 @@ int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
return err;
err = sock_error(sock->sk);
- if (err)
+ if (err) {
+ datagrams = err;
goto out_put;
+ }
entry = mmsg;
compat_entry = (struct compat_mmsghdr __user *)mmsg;
@@ -3110,6 +3155,7 @@ static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
case SIOCSIFVLAN:
case SIOCADDDLCI:
case SIOCDELDLCI:
+ case SIOCGSKNS:
return sock_ioctl(file, cmd, arg);
case SIOCGIFFLAGS:
@@ -3204,7 +3250,7 @@ int kernel_accept(struct socket *sock, struct socket **newsock, int flags)
if (err < 0)
goto done;
- err = sock->ops->accept(sock, *newsock, flags);
+ err = sock->ops->accept(sock, *newsock, flags, true);
if (err < 0) {
sock_release(*newsock);
*newsock = NULL;
generated by cgit v1.2.3 (git 2.0.4) at 2025-08-05 12:06:40 +0000