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ipv4/ipv6 compat: Fix SSM applications on 64bit kernels. 

Add support on 64-bit kernels for seting 32-bit compatible MCAST*
socket options.

Signed-off-by: David L Stevens <dlstevens@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
wifi-calibration
David L Stevens 2008-04-27 01:06:07 -07:00 committed by David S. Miller
parent 01a2202c95
commit dae5029548
4 changed files with 130 additions and 0 deletions
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3
include/net/compat.h
View File

@ -40,4 +40,7 @@ extern int put_cmsg_compat(struct msghdr*, int, int, int, void *);
extern int cmsghdr_from_user_compat_to_kern(struct msghdr *, struct sock *, unsigned char *, int);
extern int compat_mc_setsockopt(struct sock *, int, int, char __user *, int,
int (*)(struct sock *, int, int, char __user *, int));
#endif /* NET_COMPAT_H */

117
net/compat.c
View File

@ -24,6 +24,8 @@
#include <net/scm.h>
#include <net/sock.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <asm/uaccess.h>
#include <net/compat.h>
@ -521,6 +523,121 @@ asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
}
return err;
}
struct compat_group_req {
__u32 gr_interface;
struct __kernel_sockaddr_storage gr_group
__attribute__ ((aligned(4)));
} __attribute__ ((packed));
struct compat_group_source_req {
__u32 gsr_interface;
struct __kernel_sockaddr_storage gsr_group
__attribute__ ((aligned(4)));
struct __kernel_sockaddr_storage gsr_source
__attribute__ ((aligned(4)));
} __attribute__ ((packed));
struct compat_group_filter {
__u32 gf_interface;
struct __kernel_sockaddr_storage gf_group
__attribute__ ((aligned(4)));
__u32 gf_fmode;
__u32 gf_numsrc;
struct __kernel_sockaddr_storage gf_slist[1]
__attribute__ ((aligned(4)));
} __attribute__ ((packed));
int compat_mc_setsockopt(struct sock *sock, int level, int optname,
char __user *optval, int optlen,
int (*setsockopt)(struct sock *,int,int,char __user *,int))
{
char __user *koptval = optval;
int koptlen = optlen;
switch (optname) {
case MCAST_JOIN_GROUP:
case MCAST_LEAVE_GROUP:
{
struct compat_group_req __user *gr32 = (void *)optval;
struct group_req __user *kgr =
compat_alloc_user_space(sizeof(struct group_req));
u32 interface;
if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) ||
!access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) ||
__get_user(interface, &gr32->gr_interface) ||
__put_user(interface, &kgr->gr_interface) ||
copy_in_user(&kgr->gr_group, &gr32->gr_group,
sizeof(kgr->gr_group)))
return -EFAULT;
koptval = (char __user *)kgr;
koptlen = sizeof(struct group_req);
break;
}
case MCAST_JOIN_SOURCE_GROUP:
case MCAST_LEAVE_SOURCE_GROUP:
case MCAST_BLOCK_SOURCE:
case MCAST_UNBLOCK_SOURCE:
{
struct compat_group_source_req __user *gsr32 = (void *)optval;
struct group_source_req *kgsr = compat_alloc_user_space(
sizeof(struct group_source_req));
u32 interface;
if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) ||
!access_ok(VERIFY_WRITE, kgsr,
sizeof(struct group_source_req)) ||
__get_user(interface, &gsr32->gsr_interface) ||
__put_user(interface, &kgsr->gsr_interface) ||
copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group,
sizeof(kgsr->gsr_group)) ||
copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source,
sizeof(kgsr->gsr_source)))
return -EFAULT;
koptval = (char __user *)kgsr;
koptlen = sizeof(struct group_source_req);
break;
}
case MCAST_MSFILTER:
{
struct compat_group_filter __user *gf32 = (void *)optval;
struct group_filter *kgf;
u32 interface, fmode, numsrc;
if (!access_ok(VERIFY_READ, gf32, sizeof(*gf32)) ||
__get_user(interface, &gf32->gf_interface) ||
__get_user(fmode, &gf32->gf_fmode) ||
__get_user(numsrc, &gf32->gf_numsrc))
return -EFAULT;
koptlen = optlen + sizeof(struct group_filter) -
sizeof(struct compat_group_filter);
if (koptlen < GROUP_FILTER_SIZE(numsrc))
return -EINVAL;
kgf = compat_alloc_user_space(koptlen);
if (!access_ok(VERIFY_WRITE, kgf, koptlen) ||
__put_user(interface, &kgf->gf_interface) ||
__put_user(fmode, &kgf->gf_fmode) ||
__put_user(numsrc, &kgf->gf_numsrc) ||
copy_in_user(&kgf->gf_group, &gf32->gf_group,
sizeof(kgf->gf_group)) ||
(numsrc && copy_in_user(&kgf->gf_slist, &gf32->gf_slist,
numsrc * sizeof(kgf->gf_slist[0]))))
return -EFAULT;
koptval = (char __user *)kgf;
break;
}
default:
break;
}
return setsockopt(sock, level, optname, koptval, koptlen);
}
EXPORT_SYMBOL(compat_mc_setsockopt);
/* Argument list sizes for compat_sys_socketcall */
#define AL(x) ((x) * sizeof(u32))
static unsigned char nas[18]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),

5
net/ipv4/ip_sockglue.c
View File

@ -36,6 +36,7 @@
#include <linux/mroute.h>
#include <net/route.h>
#include <net/xfrm.h>
#include <net/compat.h>
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
#include <net/transp_v6.h>
#endif
@ -923,6 +924,10 @@ int compat_ip_setsockopt(struct sock *sk, int level, int optname,
if (level != SOL_IP)
return -ENOPROTOOPT;
if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER)
return compat_mc_setsockopt(sk, level, optname, optval, optlen,
ip_setsockopt);
err = do_ip_setsockopt(sk, level, optname, optval, optlen);
#ifdef CONFIG_NETFILTER
/* we need to exclude all possible ENOPROTOOPTs except default case */

5
net/ipv6/ipv6_sockglue.c
View File

@ -52,6 +52,7 @@
#include <net/udp.h>
#include <net/udplite.h>
#include <net/xfrm.h>
#include <net/compat.h>
#include <asm/uaccess.h>
@ -779,6 +780,10 @@ int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
if (level != SOL_IPV6)
return -ENOPROTOOPT;
if (optname >= MCAST_JOIN_GROUP && optname <= MCAST_MSFILTER)
return compat_mc_setsockopt(sk, level, optname, optval, optlen,
ipv6_setsockopt);
err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);
#ifdef CONFIG_NETFILTER
/* we need to exclude all possible ENOPROTOOPTs except default case */