| /* |
| * 32bit Socket syscall emulation. Based on arch/sparc64/kernel/sys_sparc32.c. |
| * |
| * Copyright (C) 2000 VA Linux Co |
| * Copyright (C) 2000 Don Dugger <n0ano@valinux.com> |
| * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com> |
| * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) |
| * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) |
| * Copyright (C) 2000 Hewlett-Packard Co. |
| * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com> |
| * Copyright (C) 2000,2001 Andi Kleen, SuSE Labs |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/fs.h> |
| #include <linux/types.h> |
| #include <linux/file.h> |
| #include <linux/icmpv6.h> |
| #include <linux/socket.h> |
| #include <linux/syscalls.h> |
| #include <linux/filter.h> |
| #include <linux/compat.h> |
| #include <linux/security.h> |
| |
| #include <net/scm.h> |
| #include <net/sock.h> |
| #include <net/ip.h> |
| #include <net/ipv6.h> |
| #include <asm/uaccess.h> |
| #include <net/compat.h> |
| |
| static inline int iov_from_user_compat_to_kern(struct iovec *kiov, |
| struct compat_iovec __user *uiov32, |
| int niov) |
| { |
| int tot_len = 0; |
| |
| while (niov > 0) { |
| compat_uptr_t buf; |
| compat_size_t len; |
| |
| if (get_user(len, &uiov32->iov_len) || |
| get_user(buf, &uiov32->iov_base)) |
| return -EFAULT; |
| |
| if (len > INT_MAX - tot_len) |
| len = INT_MAX - tot_len; |
| |
| tot_len += len; |
| kiov->iov_base = compat_ptr(buf); |
| kiov->iov_len = (__kernel_size_t) len; |
| uiov32++; |
| kiov++; |
| niov--; |
| } |
| return tot_len; |
| } |
| |
| int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg) |
| { |
| compat_uptr_t tmp1, tmp2, tmp3; |
| |
| if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || |
| __get_user(tmp1, &umsg->msg_name) || |
| __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || |
| __get_user(tmp2, &umsg->msg_iov) || |
| __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) || |
| __get_user(tmp3, &umsg->msg_control) || |
| __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || |
| __get_user(kmsg->msg_flags, &umsg->msg_flags)) |
| return -EFAULT; |
| if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
| kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
| kmsg->msg_name = compat_ptr(tmp1); |
| kmsg->msg_iov = compat_ptr(tmp2); |
| kmsg->msg_control = compat_ptr(tmp3); |
| return 0; |
| } |
| |
| /* I've named the args so it is easy to tell whose space the pointers are in. */ |
| int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov, |
| struct sockaddr *kern_address, int mode) |
| { |
| int tot_len; |
| |
| if (kern_msg->msg_namelen && kern_msg->msg_namelen) { |
| if (mode==VERIFY_READ) { |
| int err = move_addr_to_kernel(kern_msg->msg_name, |
| kern_msg->msg_namelen, |
| kern_address); |
| if (err < 0) |
| return err; |
| } |
| kern_msg->msg_name = kern_address; |
| } else { |
| kern_msg->msg_name = NULL; |
| kern_msg->msg_namelen = 0; |
| } |
| |
| tot_len = iov_from_user_compat_to_kern(kern_iov, |
| (struct compat_iovec __user *)kern_msg->msg_iov, |
| kern_msg->msg_iovlen); |
| if (tot_len >= 0) |
| kern_msg->msg_iov = kern_iov; |
| |
| return tot_len; |
| } |
| |
| /* Bleech... */ |
| #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) |
| |
| #define CMSG_COMPAT_DATA(cmsg) \ |
| ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)))) |
| #define CMSG_COMPAT_SPACE(len) \ |
| (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len)) |
| #define CMSG_COMPAT_LEN(len) \ |
| (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len)) |
| |
| #define CMSG_COMPAT_FIRSTHDR(msg) \ |
| (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \ |
| (struct compat_cmsghdr __user *)((msg)->msg_control) : \ |
| (struct compat_cmsghdr __user *)NULL) |
| |
| #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \ |
| ((ucmlen) >= sizeof(struct compat_cmsghdr) && \ |
| (ucmlen) <= (unsigned long) \ |
| ((mhdr)->msg_controllen - \ |
| ((char *)(ucmsg) - (char *)(mhdr)->msg_control))) |
| |
| static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg, |
| struct compat_cmsghdr __user *cmsg, int cmsg_len) |
| { |
| char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len); |
| if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) > |
| msg->msg_controllen) |
| return NULL; |
| return (struct compat_cmsghdr __user *)ptr; |
| } |
| |
| /* There is a lot of hair here because the alignment rules (and |
| * thus placement) of cmsg headers and length are different for |
| * 32-bit apps. -DaveM |
| */ |
| int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, |
| unsigned char *stackbuf, int stackbuf_size) |
| { |
| struct compat_cmsghdr __user *ucmsg; |
| struct cmsghdr *kcmsg, *kcmsg_base; |
| compat_size_t ucmlen; |
| __kernel_size_t kcmlen, tmp; |
| int err = -EFAULT; |
| |
| kcmlen = 0; |
| kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; |
| ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); |
| while (ucmsg != NULL) { |
| if (get_user(ucmlen, &ucmsg->cmsg_len)) |
| return -EFAULT; |
| |
| /* Catch bogons. */ |
| if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) |
| return -EINVAL; |
| |
| tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + |
| CMSG_ALIGN(sizeof(struct cmsghdr))); |
| tmp = CMSG_ALIGN(tmp); |
| kcmlen += tmp; |
| ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); |
| } |
| if (kcmlen == 0) |
| return -EINVAL; |
| |
| /* The kcmlen holds the 64-bit version of the control length. |
| * It may not be modified as we do not stick it into the kmsg |
| * until we have successfully copied over all of the data |
| * from the user. |
| */ |
| if (kcmlen > stackbuf_size) |
| kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); |
| if (kcmsg == NULL) |
| return -ENOBUFS; |
| |
| /* Now copy them over neatly. */ |
| memset(kcmsg, 0, kcmlen); |
| ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); |
| while (ucmsg != NULL) { |
| if (__get_user(ucmlen, &ucmsg->cmsg_len)) |
| goto Efault; |
| if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) |
| goto Einval; |
| tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + |
| CMSG_ALIGN(sizeof(struct cmsghdr))); |
| if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) |
| goto Einval; |
| kcmsg->cmsg_len = tmp; |
| tmp = CMSG_ALIGN(tmp); |
| if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) || |
| __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) || |
| copy_from_user(CMSG_DATA(kcmsg), |
| CMSG_COMPAT_DATA(ucmsg), |
| (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))))) |
| goto Efault; |
| |
| /* Advance. */ |
| kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); |
| ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); |
| } |
| |
| /* Ok, looks like we made it. Hook it up and return success. */ |
| kmsg->msg_control = kcmsg_base; |
| kmsg->msg_controllen = kcmlen; |
| return 0; |
| |
| Einval: |
| err = -EINVAL; |
| Efault: |
| if (kcmsg_base != (struct cmsghdr *)stackbuf) |
| sock_kfree_s(sk, kcmsg_base, kcmlen); |
| return err; |
| } |
| |
| int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) |
| { |
| struct compat_timeval ctv; |
| struct compat_timespec cts[3]; |
| struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; |
| struct compat_cmsghdr cmhdr; |
| int cmlen; |
| |
| if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { |
| kmsg->msg_flags |= MSG_CTRUNC; |
| return 0; /* XXX: return error? check spec. */ |
| } |
| |
| if (level == SOL_SOCKET && type == SCM_TIMESTAMP) { |
| struct timeval *tv = (struct timeval *)data; |
| ctv.tv_sec = tv->tv_sec; |
| ctv.tv_usec = tv->tv_usec; |
| data = &ctv; |
| len = sizeof(ctv); |
| } |
| if (level == SOL_SOCKET && |
| (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) { |
| int count = type == SCM_TIMESTAMPNS ? 1 : 3; |
| int i; |
| struct timespec *ts = (struct timespec *)data; |
| for (i = 0; i < count; i++) { |
| cts[i].tv_sec = ts[i].tv_sec; |
| cts[i].tv_nsec = ts[i].tv_nsec; |
| } |
| data = &cts; |
| len = sizeof(cts[0]) * count; |
| } |
| |
| cmlen = CMSG_COMPAT_LEN(len); |
| if (kmsg->msg_controllen < cmlen) { |
| kmsg->msg_flags |= MSG_CTRUNC; |
| cmlen = kmsg->msg_controllen; |
| } |
| cmhdr.cmsg_level = level; |
| cmhdr.cmsg_type = type; |
| cmhdr.cmsg_len = cmlen; |
| |
| if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) |
| return -EFAULT; |
| if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) |
| return -EFAULT; |
| cmlen = CMSG_COMPAT_SPACE(len); |
| if (kmsg->msg_controllen < cmlen) |
| cmlen = kmsg->msg_controllen; |
| kmsg->msg_control += cmlen; |
| kmsg->msg_controllen -= cmlen; |
| return 0; |
| } |
| |
| void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) |
| { |
| struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; |
| int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); |
| int fdnum = scm->fp->count; |
| struct file **fp = scm->fp->fp; |
| int __user *cmfptr; |
| int err = 0, i; |
| |
| if (fdnum < fdmax) |
| fdmax = fdnum; |
| |
| for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { |
| int new_fd; |
| err = security_file_receive(fp[i]); |
| if (err) |
| break; |
| err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags |
| ? O_CLOEXEC : 0); |
| if (err < 0) |
| break; |
| new_fd = err; |
| err = put_user(new_fd, cmfptr); |
| if (err) { |
| put_unused_fd(new_fd); |
| break; |
| } |
| /* Bump the usage count and install the file. */ |
| get_file(fp[i]); |
| fd_install(new_fd, fp[i]); |
| } |
| |
| if (i > 0) { |
| int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); |
| err = put_user(SOL_SOCKET, &cm->cmsg_level); |
| if (!err) |
| err = put_user(SCM_RIGHTS, &cm->cmsg_type); |
| if (!err) |
| err = put_user(cmlen, &cm->cmsg_len); |
| if (!err) { |
| cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); |
| kmsg->msg_control += cmlen; |
| kmsg->msg_controllen -= cmlen; |
| } |
| } |
| if (i < fdnum) |
| kmsg->msg_flags |= MSG_CTRUNC; |
| |
| /* |
| * All of the files that fit in the message have had their |
| * usage counts incremented, so we just free the list. |
| */ |
| __scm_destroy(scm); |
| } |
| |
| /* |
| * A struct sock_filter is architecture independent. |
| */ |
| struct compat_sock_fprog { |
| u16 len; |
| compat_uptr_t filter; /* struct sock_filter * */ |
| }; |
| |
| static int do_set_attach_filter(struct socket *sock, int level, int optname, |
| char __user *optval, unsigned int optlen) |
| { |
| struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; |
| struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); |
| compat_uptr_t ptr; |
| u16 len; |
| |
| if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) || |
| !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) || |
| __get_user(len, &fprog32->len) || |
| __get_user(ptr, &fprog32->filter) || |
| __put_user(len, &kfprog->len) || |
| __put_user(compat_ptr(ptr), &kfprog->filter)) |
| return -EFAULT; |
| |
| return sock_setsockopt(sock, level, optname, (char __user *)kfprog, |
| sizeof(struct sock_fprog)); |
| } |
| |
| static int do_set_sock_timeout(struct socket *sock, int level, |
| int optname, char __user *optval, unsigned int optlen) |
| { |
| struct compat_timeval __user *up = (struct compat_timeval __user *) optval; |
| struct timeval ktime; |
| mm_segment_t old_fs; |
| int err; |
| |
| if (optlen < sizeof(*up)) |
| return -EINVAL; |
| if (!access_ok(VERIFY_READ, up, sizeof(*up)) || |
| __get_user(ktime.tv_sec, &up->tv_sec) || |
| __get_user(ktime.tv_usec, &up->tv_usec)) |
| return -EFAULT; |
| old_fs = get_fs(); |
| set_fs(KERNEL_DS); |
| err = sock_setsockopt(sock, level, optname, (char *) &ktime, sizeof(ktime)); |
| set_fs(old_fs); |
| |
| return err; |
| } |
| |
| static int compat_sock_setsockopt(struct socket *sock, int level, int optname, |
| char __user *optval, unsigned int optlen) |
| { |
| if (optname == SO_ATTACH_FILTER) |
| return do_set_attach_filter(sock, level, optname, |
| optval, optlen); |
| if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) |
| return do_set_sock_timeout(sock, level, optname, optval, optlen); |
| |
| return sock_setsockopt(sock, level, optname, optval, optlen); |
| } |
| |
| asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, |
| char __user *optval, unsigned int optlen) |
| { |
| int err; |
| struct socket *sock; |
| |
| if (optlen < 0) |
| return -EINVAL; |
| |
| if ((sock = sockfd_lookup(fd, &err))!=NULL) |
| { |
| err = security_socket_setsockopt(sock,level,optname); |
| if (err) { |
| sockfd_put(sock); |
| return err; |
| } |
| |
| if (level == SOL_SOCKET) |
| err = compat_sock_setsockopt(sock, level, |
| optname, optval, optlen); |
| else if (sock->ops->compat_setsockopt) |
| err = sock->ops->compat_setsockopt(sock, level, |
| optname, optval, optlen); |
| else |
| err = sock->ops->setsockopt(sock, level, |
| optname, optval, optlen); |
| sockfd_put(sock); |
| } |
| return err; |
| } |
| |
| static int do_get_sock_timeout(struct socket *sock, int level, int optname, |
| char __user *optval, int __user *optlen) |
| { |
| struct compat_timeval __user *up; |
| struct timeval ktime; |
| mm_segment_t old_fs; |
| int len, err; |
| |
| up = (struct compat_timeval __user *) optval; |
| if (get_user(len, optlen)) |
| return -EFAULT; |
| if (len < sizeof(*up)) |
| return -EINVAL; |
| len = sizeof(ktime); |
| old_fs = get_fs(); |
| set_fs(KERNEL_DS); |
| err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); |
| set_fs(old_fs); |
| |
| if (!err) { |
| if (put_user(sizeof(*up), optlen) || |
| !access_ok(VERIFY_WRITE, up, sizeof(*up)) || |
| __put_user(ktime.tv_sec, &up->tv_sec) || |
| __put_user(ktime.tv_usec, &up->tv_usec)) |
| err = -EFAULT; |
| } |
| return err; |
| } |
| |
| static int compat_sock_getsockopt(struct socket *sock, int level, int optname, |
| char __user *optval, int __user *optlen) |
| { |
| if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) |
| return do_get_sock_timeout(sock, level, optname, optval, optlen); |
| return sock_getsockopt(sock, level, optname, optval, optlen); |
| } |
| |
| int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) |
| { |
| struct compat_timeval __user *ctv = |
| (struct compat_timeval __user*) userstamp; |
| int err = -ENOENT; |
| struct timeval tv; |
| |
| if (!sock_flag(sk, SOCK_TIMESTAMP)) |
| sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
| tv = ktime_to_timeval(sk->sk_stamp); |
| if (tv.tv_sec == -1) |
| return err; |
| if (tv.tv_sec == 0) { |
| sk->sk_stamp = ktime_get_real(); |
| tv = ktime_to_timeval(sk->sk_stamp); |
| } |
| err = 0; |
| if (put_user(tv.tv_sec, &ctv->tv_sec) || |
| put_user(tv.tv_usec, &ctv->tv_usec)) |
| err = -EFAULT; |
| return err; |
| } |
| EXPORT_SYMBOL(compat_sock_get_timestamp); |
| |
| int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) |
| { |
| struct compat_timespec __user *ctv = |
| (struct compat_timespec __user*) userstamp; |
| int err = -ENOENT; |
| struct timespec ts; |
| |
| if (!sock_flag(sk, SOCK_TIMESTAMP)) |
| sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
| ts = ktime_to_timespec(sk->sk_stamp); |
| if (ts.tv_sec == -1) |
| return err; |
| if (ts.tv_sec == 0) { |
| sk->sk_stamp = ktime_get_real(); |
| ts = ktime_to_timespec(sk->sk_stamp); |
| } |
| err = 0; |
| if (put_user(ts.tv_sec, &ctv->tv_sec) || |
| put_user(ts.tv_nsec, &ctv->tv_nsec)) |
| err = -EFAULT; |
| return err; |
| } |
| EXPORT_SYMBOL(compat_sock_get_timestampns); |
| |
| asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, |
| char __user *optval, int __user *optlen) |
| { |
| int err; |
| struct socket *sock; |
| |
| if ((sock = sockfd_lookup(fd, &err))!=NULL) |
| { |
| err = security_socket_getsockopt(sock, level, |
| optname); |
| if (err) { |
| sockfd_put(sock); |
| return err; |
| } |
| |
| if (level == SOL_SOCKET) |
| err = compat_sock_getsockopt(sock, level, |
| optname, optval, optlen); |
| else if (sock->ops->compat_getsockopt) |
| err = sock->ops->compat_getsockopt(sock, level, |
| optname, optval, optlen); |
| else |
| err = sock->ops->getsockopt(sock, level, |
| optname, optval, optlen); |
| sockfd_put(sock); |
| } |
| 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)); |
| |
| #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \ |
| sizeof(struct __kernel_sockaddr_storage)) |
| |
| |
| int compat_mc_setsockopt(struct sock *sock, int level, int optname, |
| char __user *optval, unsigned int optlen, |
| int (*setsockopt)(struct sock *,int,int,char __user *,unsigned 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 __user *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 __user *kgf; |
| u32 interface, fmode, numsrc; |
| |
| if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || |
| __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); |
| |
| int compat_mc_getsockopt(struct sock *sock, int level, int optname, |
| char __user *optval, int __user *optlen, |
| int (*getsockopt)(struct sock *,int,int,char __user *,int __user *)) |
| { |
| struct compat_group_filter __user *gf32 = (void *)optval; |
| struct group_filter __user *kgf; |
| int __user *koptlen; |
| u32 interface, fmode, numsrc; |
| int klen, ulen, err; |
| |
| if (optname != MCAST_MSFILTER) |
| return getsockopt(sock, level, optname, optval, optlen); |
| |
| koptlen = compat_alloc_user_space(sizeof(*koptlen)); |
| if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) || |
| __get_user(ulen, optlen)) |
| return -EFAULT; |
| |
| /* adjust len for pad */ |
| klen = ulen + sizeof(*kgf) - sizeof(*gf32); |
| |
| if (klen < GROUP_FILTER_SIZE(0)) |
| return -EINVAL; |
| |
| if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) || |
| __put_user(klen, koptlen)) |
| return -EFAULT; |
| |
| /* have to allow space for previous compat_alloc_user_space, too */ |
| kgf = compat_alloc_user_space(klen+sizeof(*optlen)); |
| |
| if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || |
| __get_user(interface, &gf32->gf_interface) || |
| __get_user(fmode, &gf32->gf_fmode) || |
| __get_user(numsrc, &gf32->gf_numsrc) || |
| __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))) |
| return -EFAULT; |
| |
| err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen); |
| if (err) |
| return err; |
| |
| if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) || |
| __get_user(klen, koptlen)) |
| return -EFAULT; |
| |
| ulen = klen - (sizeof(*kgf)-sizeof(*gf32)); |
| |
| if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) || |
| __put_user(ulen, optlen)) |
| return -EFAULT; |
| |
| if (!access_ok(VERIFY_READ, kgf, klen) || |
| !access_ok(VERIFY_WRITE, gf32, ulen) || |
| __get_user(interface, &kgf->gf_interface) || |
| __get_user(fmode, &kgf->gf_fmode) || |
| __get_user(numsrc, &kgf->gf_numsrc) || |
| __put_user(interface, &gf32->gf_interface) || |
| __put_user(fmode, &gf32->gf_fmode) || |
| __put_user(numsrc, &gf32->gf_numsrc)) |
| return -EFAULT; |
| if (numsrc) { |
| int copylen; |
| |
| klen -= GROUP_FILTER_SIZE(0); |
| copylen = numsrc * sizeof(gf32->gf_slist[0]); |
| if (copylen > klen) |
| copylen = klen; |
| if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen)) |
| return -EFAULT; |
| } |
| return err; |
| } |
| |
| EXPORT_SYMBOL(compat_mc_getsockopt); |
| |
| |
| /* Argument list sizes for compat_sys_socketcall */ |
| #define AL(x) ((x) * sizeof(u32)) |
| static unsigned char nas[19]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3), |
| AL(3),AL(3),AL(4),AL(4),AL(4),AL(6), |
| AL(6),AL(2),AL(5),AL(5),AL(3),AL(3), |
| AL(4)}; |
| #undef AL |
| |
| asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags) |
| { |
| return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); |
| } |
| |
| asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags) |
| { |
| return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); |
| } |
| |
| asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned flags) |
| { |
| return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT); |
| } |
| |
| asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len, |
| unsigned flags, struct sockaddr __user *addr, |
| int __user *addrlen) |
| { |
| return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen); |
| } |
| |
| asmlinkage long compat_sys_socketcall(int call, u32 __user *args) |
| { |
| int ret; |
| u32 a[6]; |
| u32 a0, a1; |
| |
| if (call < SYS_SOCKET || call > SYS_ACCEPT4) |
| return -EINVAL; |
| if (copy_from_user(a, args, nas[call])) |
| return -EFAULT; |
| a0 = a[0]; |
| a1 = a[1]; |
| |
| switch (call) { |
| case SYS_SOCKET: |
| ret = sys_socket(a0, a1, a[2]); |
| break; |
| case SYS_BIND: |
| ret = sys_bind(a0, compat_ptr(a1), a[2]); |
| break; |
| case SYS_CONNECT: |
| ret = sys_connect(a0, compat_ptr(a1), a[2]); |
| break; |
| case SYS_LISTEN: |
| ret = sys_listen(a0, a1); |
| break; |
| case SYS_ACCEPT: |
| ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0); |
| break; |
| case SYS_GETSOCKNAME: |
| ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); |
| break; |
| case SYS_GETPEERNAME: |
| ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); |
| break; |
| case SYS_SOCKETPAIR: |
| ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); |
| break; |
| case SYS_SEND: |
| ret = sys_send(a0, compat_ptr(a1), a[2], a[3]); |
| break; |
| case SYS_SENDTO: |
| ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); |
| break; |
| case SYS_RECV: |
| ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]); |
| break; |
| case SYS_RECVFROM: |
| ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], |
| compat_ptr(a[4]), compat_ptr(a[5])); |
| break; |
| case SYS_SHUTDOWN: |
| ret = sys_shutdown(a0,a1); |
| break; |
| case SYS_SETSOCKOPT: |
| ret = compat_sys_setsockopt(a0, a1, a[2], |
| compat_ptr(a[3]), a[4]); |
| break; |
| case SYS_GETSOCKOPT: |
| ret = compat_sys_getsockopt(a0, a1, a[2], |
| compat_ptr(a[3]), compat_ptr(a[4])); |
| break; |
| case SYS_SENDMSG: |
| ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); |
| break; |
| case SYS_RECVMSG: |
| ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); |
| break; |
| case SYS_ACCEPT4: |
| ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); |
| break; |
| default: |
| ret = -EINVAL; |
| break; |
| } |
| return ret; |
| } |