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hurd: Ignore bytes beyond sockaddr length for AF_UNIX

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Samuel Thibault 2015-02-08 04:25:12 +01:00
parent 3999d26ead
commit a5eb23deb6
5 changed files with 22 additions and 8 deletions
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10
ChangeLog
View File

@ -45,6 +45,16 @@
_IOT__IOTBASE_uint64_t, _IOT__IOTBASE_size_t, _IOT__IOTBASE_ssize_t,
_IOTBASE_unsigned, _IOTBASE_signed): Define macros.
[BZ #17944]
* hurd/hurdsocket.h: New file, defines _hurd_sun_path_dupa which
duplicates ADDR->sun_path with sockaddr LEN limitation.
* sysdeps/mach/hurd/connect.c: Include <string.h>
(__connect): Give result of _hurd_sun_path_dupa to name lookup.
* sysdeps/mach/hurd/sendmsg.c: Likewise.
* sysdeps/mach/hurd/sendto.c: Likewise.
* sysdeps/mach/hurd/bind.c: Call _hurd_sun_path_dupa instead of
implementing it by hand.
2015-02-06 Roland McGrath <roland@hack.frob.com>
* sysdeps/arm/sysdep.h [!PROF] [ARCH_HAS_T2 && !PIC] (LDR_GLOBAL):

8
sysdeps/mach/hurd/bind.c
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@ -25,7 +25,7 @@
#include <stddef.h>
#include <hurd/ifsock.h>
#include <sys/un.h>
#include <string.h>
#include "hurd/hurdsocket.h"
/* Give the socket FD the local address ADDR (which is LEN bytes long). */
int
@ -37,13 +37,11 @@ __bind (int fd, __CONST_SOCKADDR_ARG addrarg, socklen_t len)
if (addr->sun_family == AF_LOCAL)
{
char *name = _hurd_sun_path_dupa (addr, len);
/* For the local domain, we must create a node in the filesystem
using the ifsock translator and then fetch the address from it. */
file_t dir, node, ifsock;
char name[len - offsetof (struct sockaddr_un, sun_path) + 1], *n;
strncpy (name, addr->sun_path, sizeof name - 1);
name[sizeof name - 1] = '\0'; /* Make sure */
char *n;
dir = __file_name_split (name, &n);
if (dir == MACH_PORT_NULL)

4
sysdeps/mach/hurd/connect.c
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@ -22,6 +22,7 @@
#include <hurd/socket.h>
#include <sys/un.h>
#include <hurd/ifsock.h>
#include "hurd/hurdsocket.h"
/* Open a connection on socket FD to peer at ADDR (which LEN bytes long).
For connectionless socket types, just set the default address to send to
@ -36,9 +37,10 @@ __connect (int fd, __CONST_SOCKADDR_ARG addrarg, socklen_t len)
if (addr->sun_family == AF_LOCAL)
{
char *name = _hurd_sun_path_dupa (addr, len);
/* For the local domain, we must look up the name as a file and talk
to it with the ifsock protocol. */
file_t file = __file_name_lookup (addr->sun_path, 0, 0);
file_t file = __file_name_lookup (name, 0, 0);
if (file == MACH_PORT_NULL)
return -1;
err = __ifsock_getsockaddr (file, &aport);

4
sysdeps/mach/hurd/sendmsg.c
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@ -24,6 +24,7 @@
#include <hurd/fd.h>
#include <hurd/ifsock.h>
#include <hurd/socket.h>
#include "hurd/hurdsocket.h"
/* Send a message described MESSAGE on socket FD.
Returns the number of bytes sent, or -1 for errors. */
@ -104,9 +105,10 @@ __libc_sendmsg (int fd, const struct msghdr *message, int flags)
{
if (addr->sun_family == AF_LOCAL)
{
char *name = _hurd_sun_path_dupa (addr, addr_len);
/* For the local domain, we must look up the name as a file
and talk to it with the ifsock protocol. */
file_t file = __file_name_lookup (addr->sun_path, 0, 0);
file_t file = __file_name_lookup (name, 0, 0);
if (file == MACH_PORT_NULL)
{
if (dealloc)

4
sysdeps/mach/hurd/sendto.c
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@ -22,6 +22,7 @@
#include <hurd/fd.h>
#include <hurd/ifsock.h>
#include <hurd/socket.h>
#include "hurd/hurdsocket.h"
/* Send N bytes of BUF on socket FD to peer at address ADDR (which is
ADDR_LEN bytes long). Returns the number sent, or -1 for errors. */
@ -47,9 +48,10 @@ __sendto (int fd,
if (addr->sun_family == AF_LOCAL)
{
char *name = _hurd_sun_path_dupa (addr, addr_len);
/* For the local domain, we must look up the name as a file and talk
to it with the ifsock protocol. */
file_t file = __file_name_lookup (addr->sun_path, 0, 0);
file_t file = __file_name_lookup (name, 0, 0);
if (file == MACH_PORT_NULL)
return errno;
err_port = __ifsock_getsockaddr (file, aport);