| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * 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/gfp.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 <linux/audit.h> |
| #include <linux/export.h> |
| |
| #include <net/scm.h> |
| #include <net/sock.h> |
| #include <net/ip.h> |
| #include <net/ipv6.h> |
| #include <linux/uaccess.h> |
| #include <net/compat.h> |
| |
| int get_compat_msghdr(struct msghdr *kmsg, |
| struct compat_msghdr __user *umsg, |
| struct sockaddr __user **save_addr, |
| struct iovec **iov) |
| { |
| struct compat_msghdr msg; |
| ssize_t err; |
| |
| if (copy_from_user(&msg, umsg, sizeof(*umsg))) |
| return -EFAULT; |
| |
| kmsg->msg_flags = msg.msg_flags; |
| kmsg->msg_namelen = msg.msg_namelen; |
| |
| if (!msg.msg_name) |
| kmsg->msg_namelen = 0; |
| |
| if (kmsg->msg_namelen < 0) |
| return -EINVAL; |
| |
| if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
| kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
| |
| kmsg->msg_control = compat_ptr(msg.msg_control); |
| kmsg->msg_controllen = msg.msg_controllen; |
| |
| if (save_addr) |
| *save_addr = compat_ptr(msg.msg_name); |
| |
| if (msg.msg_name && kmsg->msg_namelen) { |
| if (!save_addr) { |
| err = move_addr_to_kernel(compat_ptr(msg.msg_name), |
| kmsg->msg_namelen, |
| kmsg->msg_name); |
| if (err < 0) |
| return err; |
| } |
| } else { |
| kmsg->msg_name = NULL; |
| kmsg->msg_namelen = 0; |
| } |
| |
| if (msg.msg_iovlen > UIO_MAXIOV) |
| return -EMSGSIZE; |
| |
| kmsg->msg_iocb = NULL; |
| |
| err = compat_import_iovec(save_addr ? READ : WRITE, |
| compat_ptr(msg.msg_iov), msg.msg_iovlen, |
| UIO_FASTIOV, iov, &kmsg->msg_iter); |
| return err < 0 ? err : 0; |
| } |
| |
| /* Bleech... */ |
| #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) |
| |
| #define CMSG_COMPAT_DATA(cmsg) \ |
| ((void __user *)((char __user *)(cmsg) + sizeof(struct compat_cmsghdr))) |
| #define CMSG_COMPAT_SPACE(len) \ |
| (sizeof(struct compat_cmsghdr) + CMSG_COMPAT_ALIGN(len)) |
| #define CMSG_COMPAT_LEN(len) \ |
| (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; |
| |
| BUILD_BUG_ON(sizeof(struct compat_cmsghdr) != |
| CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))); |
| |
| 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 - sizeof(*ucmsg)) + 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 - sizeof(*ucmsg)) + 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 - sizeof(*ucmsg)))) |
| goto Efault; |
| |
| /* Advance. */ |
| kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); |
| ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); |
| } |
| |
| /* |
| * check the length of messages copied in is the same as the |
| * what we get from the first loop |
| */ |
| if ((char *)kcmsg - (char *)kcmsg_base != kcmlen) |
| goto Einval; |
| |
| /* 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_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; |
| struct compat_cmsghdr cmhdr; |
| struct old_timeval32 ctv; |
| struct old_timespec32 cts[3]; |
| int cmlen; |
| |
| if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { |
| kmsg->msg_flags |= MSG_CTRUNC; |
| return 0; /* XXX: return error? check spec. */ |
| } |
| |
| if (!COMPAT_USE_64BIT_TIME) { |
| if (level == SOL_SOCKET && type == SO_TIMESTAMP_OLD) { |
| struct __kernel_old_timeval *tv = (struct __kernel_old_timeval *)data; |
| ctv.tv_sec = tv->tv_sec; |
| ctv.tv_usec = tv->tv_usec; |
| data = &ctv; |
| len = sizeof(ctv); |
| } |
| if (level == SOL_SOCKET && |
| (type == SO_TIMESTAMPNS_OLD || type == SO_TIMESTAMPING_OLD)) { |
| int count = type == SO_TIMESTAMPNS_OLD ? 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. */ |
| __receive_sock(fp[i]); |
| fd_install(new_fd, get_file(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); |
| } |
| |
| /* allocate a 64-bit sock_fprog on the user stack for duration of syscall. */ |
| struct sock_fprog __user *get_compat_bpf_fprog(char __user *optval) |
| { |
| 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)); |
| struct compat_sock_fprog f32; |
| struct sock_fprog f; |
| |
| if (copy_from_user(&f32, fprog32, sizeof(*fprog32))) |
| return NULL; |
| memset(&f, 0, sizeof(f)); |
| f.len = f32.len; |
| f.filter = compat_ptr(f32.filter); |
| if (copy_to_user(kfprog, &f, sizeof(struct sock_fprog))) |
| return NULL; |
| |
| return kfprog; |
| } |
| EXPORT_SYMBOL_GPL(get_compat_bpf_fprog); |
| |
| static int do_set_attach_filter(struct socket *sock, int level, int optname, |
| char __user *optval, unsigned int optlen) |
| { |
| struct sock_fprog __user *kfprog; |
| |
| kfprog = get_compat_bpf_fprog(optval); |
| if (!kfprog) |
| return -EFAULT; |
| |
| return sock_setsockopt(sock, level, optname, (char __user *)kfprog, |
| sizeof(struct sock_fprog)); |
| } |
| |
| static int compat_sock_setsockopt(struct socket *sock, int level, int optname, |
| char __user *optval, unsigned int optlen) |
| { |
| if (optname == SO_ATTACH_FILTER || |
| optname == SO_ATTACH_REUSEPORT_CBPF) |
| return do_set_attach_filter(sock, level, optname, |
| optval, optlen); |
| return sock_setsockopt(sock, level, optname, optval, optlen); |
| } |
| |
| static int __compat_sys_setsockopt(int fd, int level, int optname, |
| char __user *optval, unsigned int optlen) |
| { |
| int err; |
| struct socket *sock; |
| |
| if (optlen > INT_MAX) |
| return -EINVAL; |
| |
| sock = sockfd_lookup(fd, &err); |
| if (sock) { |
| 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; |
| } |
| |
| COMPAT_SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
| char __user *, optval, unsigned int, optlen) |
| { |
| return __compat_sys_setsockopt(fd, level, optname, optval, optlen); |
| } |
| |
| static int __compat_sys_getsockopt(int fd, int level, int optname, |
| char __user *optval, |
| int __user *optlen) |
| { |
| int err; |
| struct socket *sock = sockfd_lookup(fd, &err); |
| |
| if (sock) { |
| err = security_socket_getsockopt(sock, level, optname); |
| if (err) { |
| sockfd_put(sock); |
| return err; |
| } |
| |
| if (level == SOL_SOCKET) |
| err = 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; |
| } |
| |
| COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
| char __user *, optval, int __user *, optlen) |
| { |
| return __compat_sys_getsockopt(fd, level, optname, optval, optlen); |
| } |
| |
| struct compat_group_req { |
| __u32 gr_interface; |
| struct __kernel_sockaddr_storage gr_group |
| __aligned(4); |
| } __packed; |
| |
| struct compat_group_source_req { |
| __u32 gsr_interface; |
| struct __kernel_sockaddr_storage gsr_group |
| __aligned(4); |
| struct __kernel_sockaddr_storage gsr_source |
| __aligned(4); |
| } __packed; |
| |
| struct compat_group_filter { |
| __u32 gf_interface; |
| struct __kernel_sockaddr_storage gf_group |
| __aligned(4); |
| __u32 gf_fmode; |
| __u32 gf_numsrc; |
| struct __kernel_sockaddr_storage gf_slist[1] |
| __aligned(4); |
| } __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 __user *)optval; |
| struct group_req __user *kgr = |
| compat_alloc_user_space(sizeof(struct group_req)); |
| u32 interface; |
| |
| if (!access_ok(gr32, sizeof(*gr32)) || |
| !access_ok(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 __user *)optval; |
| struct group_source_req __user *kgsr = compat_alloc_user_space( |
| sizeof(struct group_source_req)); |
| u32 interface; |
| |
| if (!access_ok(gsr32, sizeof(*gsr32)) || |
| !access_ok(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 __user *)optval; |
| struct group_filter __user *kgf; |
| u32 interface, fmode, numsrc; |
| |
| if (!access_ok(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(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 __user *)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(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(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(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(koptlen, sizeof(*koptlen)) || |
| __get_user(klen, koptlen)) |
| return -EFAULT; |
| |
| ulen = klen - (sizeof(*kgf)-sizeof(*gf32)); |
| |
| if (!access_ok(optlen, sizeof(*optlen)) || |
| __put_user(ulen, optlen)) |
| return -EFAULT; |
| |
| if (!access_ok(kgf, klen) || |
| !access_ok(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[21] = { |
| 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), AL(5), AL(4) |
| }; |
| #undef AL |
| |
| static inline long __compat_sys_sendmsg(int fd, |
| struct compat_msghdr __user *msg, |
| unsigned int flags) |
| { |
| return __sys_sendmsg(fd, (struct user_msghdr __user *)msg, |
| flags | MSG_CMSG_COMPAT, false); |
| } |
| |
| COMPAT_SYSCALL_DEFINE3(sendmsg, int, fd, struct compat_msghdr __user *, msg, |
| unsigned int, flags) |
| { |
| return __compat_sys_sendmsg(fd, msg, flags); |
| } |
| |
| static inline long __compat_sys_sendmmsg(int fd, |
| struct compat_mmsghdr __user *mmsg, |
| unsigned int vlen, unsigned int flags) |
| { |
| return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
| flags | MSG_CMSG_COMPAT, false); |
| } |
| |
| COMPAT_SYSCALL_DEFINE4(sendmmsg, int, fd, struct compat_mmsghdr __user *, mmsg, |
| unsigned int, vlen, unsigned int, flags) |
| { |
| return __compat_sys_sendmmsg(fd, mmsg, vlen, flags); |
| } |
| |
| static inline long __compat_sys_recvmsg(int fd, |
| struct compat_msghdr __user *msg, |
| unsigned int flags) |
| { |
| return __sys_recvmsg(fd, (struct user_msghdr __user *)msg, |
| flags | MSG_CMSG_COMPAT, false); |
| } |
| |
| COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg, |
| unsigned int, flags) |
| { |
| return __compat_sys_recvmsg(fd, msg, flags); |
| } |
| |
| static inline long __compat_sys_recvfrom(int fd, void __user *buf, |
| compat_size_t len, unsigned int flags, |
| struct sockaddr __user *addr, |
| int __user *addrlen) |
| { |
| return __sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, |
| addrlen); |
| } |
| |
| COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags) |
| { |
| return __compat_sys_recvfrom(fd, buf, len, flags, NULL, NULL); |
| } |
| |
| COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len, |
| unsigned int, flags, struct sockaddr __user *, addr, |
| int __user *, addrlen) |
| { |
| return __compat_sys_recvfrom(fd, buf, len, flags, addr, addrlen); |
| } |
| |
| COMPAT_SYSCALL_DEFINE5(recvmmsg_time64, int, fd, struct compat_mmsghdr __user *, mmsg, |
| unsigned int, vlen, unsigned int, flags, |
| struct __kernel_timespec __user *, timeout) |
| { |
| return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
| flags | MSG_CMSG_COMPAT, timeout, NULL); |
| } |
| |
| #ifdef CONFIG_COMPAT_32BIT_TIME |
| COMPAT_SYSCALL_DEFINE5(recvmmsg_time32, int, fd, struct compat_mmsghdr __user *, mmsg, |
| unsigned int, vlen, unsigned int, flags, |
| struct old_timespec32 __user *, timeout) |
| { |
| return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
| flags | MSG_CMSG_COMPAT, NULL, timeout); |
| } |
| #endif |
| |
| COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args) |
| { |
| u32 a[AUDITSC_ARGS]; |
| unsigned int len; |
| u32 a0, a1; |
| int ret; |
| |
| if (call < SYS_SOCKET || call > SYS_SENDMMSG) |
| return -EINVAL; |
| len = nas[call]; |
| if (len > sizeof(a)) |
| return -EINVAL; |
| |
| if (copy_from_user(a, args, len)) |
| return -EFAULT; |
| |
| ret = audit_socketcall_compat(len / sizeof(a[0]), a); |
| if (ret) |
| return ret; |
| |
| 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_sendto(a0, compat_ptr(a1), a[2], a[3], NULL, 0); |
| 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_recvfrom(a0, compat_ptr(a1), a[2], a[3], |
| NULL, NULL); |
| 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_SENDMMSG: |
| ret = __compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]); |
| break; |
| case SYS_RECVMSG: |
| ret = __compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); |
| break; |
| case SYS_RECVMMSG: |
| ret = __sys_recvmmsg(a0, compat_ptr(a1), a[2], |
| a[3] | MSG_CMSG_COMPAT, NULL, |
| compat_ptr(a[4])); |
| break; |
| case SYS_ACCEPT4: |
| ret = __sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); |
| break; |
| default: |
| ret = -EINVAL; |
| break; |
| } |
| return ret; |
| } |