diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2015-03-21 19:12:32 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2015-04-09 00:02:21 -0400 |
| commit | 602bd0e90e14c0b50246b361290dbbbe551ada98 (patch) | |
| tree | bf8444fd9daa75c35c71a4dc118f7270c3f618f6 /net/socket.c | |
| parent | fe3cce2e01ef7a2796c9674b1ec3a28a85f53547 (diff) | |
| download | lwn-602bd0e90e14c0b50246b361290dbbbe551ada98.tar.gz lwn-602bd0e90e14c0b50246b361290dbbbe551ada98.zip | |
net: switch sendto() and recvfrom() to import_single_range()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'net/socket.c')
| -rw-r--r-- | net/socket.c | 24 |
1 files changed, 8 insertions, 16 deletions
diff --git a/net/socket.c b/net/socket.c index 989b1ae32afa..46f0e1d752b3 100644 --- a/net/socket.c +++ b/net/socket.c @@ -1650,18 +1650,14 @@ SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, struct iovec iov; int fput_needed; - if (len > INT_MAX) - len = INT_MAX; - if (unlikely(!access_ok(VERIFY_READ, buff, len))) - return -EFAULT; + err = import_single_range(WRITE, buff, len, &iov, &msg.msg_iter); + if (unlikely(err)) + return err; sock = sockfd_lookup_light(fd, &err, &fput_needed); if (!sock) goto out; - iov.iov_base = buff; - iov.iov_len = len; msg.msg_name = NULL; - iov_iter_init(&msg.msg_iter, WRITE, &iov, 1, len); msg.msg_control = NULL; msg.msg_controllen = 0; msg.msg_namelen = 0; @@ -1675,7 +1671,7 @@ SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, if (sock->file->f_flags & O_NONBLOCK) flags |= MSG_DONTWAIT; msg.msg_flags = flags; - err = sock_sendmsg(sock, &msg, len); + err = sock_sendmsg(sock, &msg, iov_iter_count(&msg.msg_iter)); out_put: fput_light(sock->file, fput_needed); @@ -1710,26 +1706,22 @@ SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, int err, err2; int fput_needed; - if (size > INT_MAX) - size = INT_MAX; - if (unlikely(!access_ok(VERIFY_WRITE, ubuf, size))) - return -EFAULT; + err = import_single_range(READ, ubuf, size, &iov, &msg.msg_iter); + if (unlikely(err)) + return err; sock = sockfd_lookup_light(fd, &err, &fput_needed); if (!sock) goto out; msg.msg_control = NULL; msg.msg_controllen = 0; - iov.iov_len = size; - iov.iov_base = ubuf; - iov_iter_init(&msg.msg_iter, READ, &iov, 1, size); /* Save some cycles and don't copy the address if not needed */ msg.msg_name = addr ? (struct sockaddr *)&address : NULL; /* We assume all kernel code knows the size of sockaddr_storage */ msg.msg_namelen = 0; if (sock->file->f_flags & O_NONBLOCK) flags |= MSG_DONTWAIT; - err = sock_recvmsg(sock, &msg, size, flags); + err = sock_recvmsg(sock, &msg, iov_iter_count(&msg.msg_iter), flags); if (err >= 0 && addr != NULL) { err2 = move_addr_to_user(&address, |