Date: Mon, 24 Aug 2020 15:45:42 +0000 (UTC) From: Edward Tomasz Napierala <trasz@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r364693 - in stable/12/sys: compat/linux modules/linux_common Message-ID: <202008241545.07OFjgMx048949@repo.freebsd.org>
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Author: trasz Date: Mon Aug 24 15:45:42 2020 New Revision: 364693 URL: https://svnweb.freebsd.org/changeset/base/364693 Log: MFC r347533 by dchagin: Our bsd_to_linux_sockaddr() and linux_to_bsd_sockaddr() functions alter the userspace sockaddr to convert the format between linux and BSD versions. That's the minimum 3 of copyin/copyout operations for one syscall. Also some syscall uses linux_sa_put() and linux_getsockaddr() when load sockaddr to userspace or from userspace accordingly. To avoid this chaos, especially converting sockaddr in the userspace, rewrite these 4 functions to convert sockaddr only in kernel and leave only 2 of this functions. Also in order to reduce duplication between MD parts of the Linuxulator put struct sockaddr conversion functions that are MI out into linux_common module. PR: 232920 Modified: stable/12/sys/compat/linux/linux.c stable/12/sys/compat/linux/linux.h stable/12/sys/compat/linux/linux_common.h stable/12/sys/compat/linux/linux_socket.c stable/12/sys/compat/linux/linux_socket.h stable/12/sys/modules/linux_common/Makefile Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/compat/linux/linux.c ============================================================================== --- stable/12/sys/compat/linux/linux.c Mon Aug 24 14:58:58 2020 (r364692) +++ stable/12/sys/compat/linux/linux.c Mon Aug 24 15:45:42 2020 (r364693) @@ -27,21 +27,29 @@ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); +#include <opt_inet6.h> + #include <sys/param.h> #include <sys/systm.h> #include <sys/ctype.h> #include <sys/jail.h> #include <sys/lock.h> +#include <sys/malloc.h> #include <sys/signalvar.h> #include <sys/socket.h> +#include <sys/socketvar.h> #include <net/if.h> #include <net/if_var.h> #include <net/if_dl.h> #include <net/if_types.h> +#include <sys/un.h> +#include <netinet/in.h> + #include <compat/linux/linux.h> #include <compat/linux/linux_common.h> +#include <compat/linux/linux_util.h> struct futex_list futex_list; struct mtx futex_mtx; /* protects the futex list */ @@ -325,4 +333,194 @@ linux_ifhwaddr(struct ifnet *ifp, struct l_sockaddr *l } return (ENOENT); +} + +int +linux_to_bsd_domain(int domain) +{ + + switch (domain) { + case LINUX_AF_UNSPEC: + return (AF_UNSPEC); + case LINUX_AF_UNIX: + return (AF_LOCAL); + case LINUX_AF_INET: + return (AF_INET); + case LINUX_AF_INET6: + return (AF_INET6); + case LINUX_AF_AX25: + return (AF_CCITT); + case LINUX_AF_IPX: + return (AF_IPX); + case LINUX_AF_APPLETALK: + return (AF_APPLETALK); + } + return (-1); +} + +int +bsd_to_linux_domain(int domain) +{ + + switch (domain) { + case AF_UNSPEC: + return (LINUX_AF_UNSPEC); + case AF_LOCAL: + return (LINUX_AF_UNIX); + case AF_INET: + return (LINUX_AF_INET); + case AF_INET6: + return (LINUX_AF_INET6); + case AF_CCITT: + return (LINUX_AF_AX25); + case AF_IPX: + return (LINUX_AF_IPX); + case AF_APPLETALK: + return (LINUX_AF_APPLETALK); + } + return (-1); +} + +/* + * Based on the fact that: + * 1. Native and Linux storage of struct sockaddr + * and struct sockaddr_in6 are equal. + * 2. On Linux sa_family is the first member of all struct sockaddr. + */ +int +bsd_to_linux_sockaddr(const struct sockaddr *sa, struct l_sockaddr **lsa, + socklen_t len) +{ + struct l_sockaddr *kosa; + int error, bdom; + + *lsa = NULL; + if (len < 2 || len > UCHAR_MAX) + return (EINVAL); + + kosa = malloc(len, M_SONAME, M_WAITOK); + bcopy(sa, kosa, len); + + bdom = bsd_to_linux_domain(sa->sa_family); + if (bdom == -1) { + error = EAFNOSUPPORT; + goto out; + } + + kosa->sa_family = bdom; + *lsa = kosa; + return (0); + +out: + free(kosa, M_SONAME); + return (error); +} + +int +linux_to_bsd_sockaddr(const struct l_sockaddr *osa, struct sockaddr **sap, + socklen_t *len) +{ + struct sockaddr *sa; + struct l_sockaddr *kosa; +#ifdef INET6 + struct sockaddr_in6 *sin6; + bool oldv6size; +#endif + char *name; + int salen, bdom, error, hdrlen, namelen; + + if (*len < 2 || *len > UCHAR_MAX) + return (EINVAL); + + salen = *len; + +#ifdef INET6 + oldv6size = false; + /* + * Check for old (pre-RFC2553) sockaddr_in6. We may accept it + * if it's a v4-mapped address, so reserve the proper space + * for it. + */ + if (salen == sizeof(struct sockaddr_in6) - sizeof(uint32_t)) { + salen += sizeof(uint32_t); + oldv6size = true; + } +#endif + + kosa = malloc(salen, M_SONAME, M_WAITOK); + + if ((error = copyin(osa, kosa, *len))) + goto out; + + bdom = linux_to_bsd_domain(kosa->sa_family); + if (bdom == -1) { + error = EAFNOSUPPORT; + goto out; + } + +#ifdef INET6 + /* + * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, + * which lacks the scope id compared with RFC2553 one. If we detect + * the situation, reject the address and write a message to system log. + * + * Still accept addresses for which the scope id is not used. + */ + if (oldv6size) { + if (bdom == AF_INET6) { + sin6 = (struct sockaddr_in6 *)kosa; + if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) || + (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && + !IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && + !IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) && + !IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && + !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { + sin6->sin6_scope_id = 0; + } else { + linux_msg(curthread, + "obsolete pre-RFC2553 sockaddr_in6 rejected\n"); + error = EINVAL; + goto out; + } + } else + salen -= sizeof(uint32_t); + } +#endif + if (bdom == AF_INET) { + if (salen < sizeof(struct sockaddr_in)) { + error = EINVAL; + goto out; + } + salen = sizeof(struct sockaddr_in); + } + + if (bdom == AF_LOCAL && salen > sizeof(struct sockaddr_un)) { + hdrlen = offsetof(struct sockaddr_un, sun_path); + name = ((struct sockaddr_un *)kosa)->sun_path; + if (*name == '\0') { + /* + * Linux abstract namespace starts with a NULL byte. + * XXX We do not support abstract namespace yet. + */ + namelen = strnlen(name + 1, salen - hdrlen - 1) + 1; + } else + namelen = strnlen(name, salen - hdrlen); + salen = hdrlen + namelen; + if (salen > sizeof(struct sockaddr_un)) { + error = ENAMETOOLONG; + goto out; + } + } + + sa = (struct sockaddr *)kosa; + sa->sa_family = bdom; + sa->sa_len = salen; + + *sap = sa; + *len = salen; + return (0); + +out: + free(kosa, M_SONAME); + return (error); } Modified: stable/12/sys/compat/linux/linux.h ============================================================================== --- stable/12/sys/compat/linux/linux.h Mon Aug 24 14:58:58 2020 (r364692) +++ stable/12/sys/compat/linux/linux.h Mon Aug 24 15:45:42 2020 (r364693) @@ -47,6 +47,17 @@ struct l_sockaddr { #define LINUX_ARPHRD_LOOPBACK 772 /* + * Supported address families + */ +#define LINUX_AF_UNSPEC 0 +#define LINUX_AF_UNIX 1 +#define LINUX_AF_INET 2 +#define LINUX_AF_AX25 3 +#define LINUX_AF_IPX 4 +#define LINUX_AF_APPLETALK 5 +#define LINUX_AF_INET6 10 + +/* * net device flags */ #define LINUX_IFF_UP 0x0001 Modified: stable/12/sys/compat/linux/linux_common.h ============================================================================== --- stable/12/sys/compat/linux/linux_common.h Mon Aug 24 14:58:58 2020 (r364692) +++ stable/12/sys/compat/linux/linux_common.h Mon Aug 24 15:45:42 2020 (r364693) @@ -35,4 +35,11 @@ struct ifnet *ifname_linux_to_bsd(struct thread *td, void linux_ifflags(struct ifnet *ifp, short *flags); int linux_ifhwaddr(struct ifnet *ifp, struct l_sockaddr *lsa); +int linux_to_bsd_domain(int domain); +int bsd_to_linux_domain(int domain); +int bsd_to_linux_sockaddr(const struct sockaddr *sa, + struct l_sockaddr **lsa, socklen_t len); +int linux_to_bsd_sockaddr(const struct l_sockaddr *lsa, + struct sockaddr **sap, socklen_t *len); + #endif /* _LINUX_COMMON_H_ */ Modified: stable/12/sys/compat/linux/linux_socket.c ============================================================================== --- stable/12/sys/compat/linux/linux_socket.c Mon Aug 24 14:58:58 2020 (r364692) +++ stable/12/sys/compat/linux/linux_socket.c Mon Aug 24 15:45:42 2020 (r364693) @@ -70,177 +70,21 @@ __FBSDID("$FreeBSD$"); #include <machine/../linux/linux.h> #include <machine/../linux/linux_proto.h> #endif +#include <compat/linux/linux_common.h> #include <compat/linux/linux_file.h> #include <compat/linux/linux_mib.h> #include <compat/linux/linux_socket.h> #include <compat/linux/linux_timer.h> #include <compat/linux/linux_util.h> -static int linux_to_bsd_domain(int); static int linux_sendmsg_common(struct thread *, l_int, struct l_msghdr *, l_uint); static int linux_recvmsg_common(struct thread *, l_int, struct l_msghdr *, l_uint, struct msghdr *); static int linux_set_socket_flags(int, int *); -/* - * Reads a Linux sockaddr and does any necessary translation. - * Linux sockaddrs don't have a length field, only a family. - * Copy the osockaddr structure pointed to by osa to kernel, adjust - * family and convert to sockaddr. - */ -static int -linux_getsockaddr(struct sockaddr **sap, const struct osockaddr *osa, int salen) -{ - struct sockaddr *sa; - struct osockaddr *kosa; -#ifdef INET6 - struct sockaddr_in6 *sin6; - int oldv6size; -#endif - char *name; - int bdom, error, hdrlen, namelen; - if (salen < 2 || salen > UCHAR_MAX || !osa) - return (EINVAL); - -#ifdef INET6 - oldv6size = 0; - /* - * Check for old (pre-RFC2553) sockaddr_in6. We may accept it - * if it's a v4-mapped address, so reserve the proper space - * for it. - */ - if (salen == sizeof(struct sockaddr_in6) - sizeof(uint32_t)) { - salen += sizeof(uint32_t); - oldv6size = 1; - } -#endif - - kosa = malloc(salen, M_SONAME, M_WAITOK); - - if ((error = copyin(osa, kosa, salen))) - goto out; - - bdom = linux_to_bsd_domain(kosa->sa_family); - if (bdom == -1) { - error = EAFNOSUPPORT; - goto out; - } - -#ifdef INET6 - /* - * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, - * which lacks the scope id compared with RFC2553 one. If we detect - * the situation, reject the address and write a message to system log. - * - * Still accept addresses for which the scope id is not used. - */ - if (oldv6size) { - if (bdom == AF_INET6) { - sin6 = (struct sockaddr_in6 *)kosa; - if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) || - (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && - !IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && - !IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) && - !IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && - !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { - sin6->sin6_scope_id = 0; - } else { - log(LOG_DEBUG, - "obsolete pre-RFC2553 sockaddr_in6 rejected\n"); - error = EINVAL; - goto out; - } - } else - salen -= sizeof(uint32_t); - } -#endif - if (bdom == AF_INET) { - if (salen < sizeof(struct sockaddr_in)) { - error = EINVAL; - goto out; - } - salen = sizeof(struct sockaddr_in); - } - - if (bdom == AF_LOCAL && salen > sizeof(struct sockaddr_un)) { - hdrlen = offsetof(struct sockaddr_un, sun_path); - name = ((struct sockaddr_un *)kosa)->sun_path; - if (*name == '\0') { - /* - * Linux abstract namespace starts with a NULL byte. - * XXX We do not support abstract namespace yet. - */ - namelen = strnlen(name + 1, salen - hdrlen - 1) + 1; - } else - namelen = strnlen(name, salen - hdrlen); - salen = hdrlen + namelen; - if (salen > sizeof(struct sockaddr_un)) { - error = ENAMETOOLONG; - goto out; - } - } - - sa = (struct sockaddr *)kosa; - sa->sa_family = bdom; - sa->sa_len = salen; - - *sap = sa; - return (0); - -out: - free(kosa, M_SONAME); - return (error); -} - static int -linux_to_bsd_domain(int domain) -{ - - switch (domain) { - case LINUX_AF_UNSPEC: - return (AF_UNSPEC); - case LINUX_AF_UNIX: - return (AF_LOCAL); - case LINUX_AF_INET: - return (AF_INET); - case LINUX_AF_INET6: - return (AF_INET6); - case LINUX_AF_AX25: - return (AF_CCITT); - case LINUX_AF_IPX: - return (AF_IPX); - case LINUX_AF_APPLETALK: - return (AF_APPLETALK); - } - return (-1); -} - -static int -bsd_to_linux_domain(int domain) -{ - - switch (domain) { - case AF_UNSPEC: - return (LINUX_AF_UNSPEC); - case AF_LOCAL: - return (LINUX_AF_UNIX); - case AF_INET: - return (LINUX_AF_INET); - case AF_INET6: - return (LINUX_AF_INET6); - case AF_CCITT: - return (LINUX_AF_AX25); - case AF_IPX: - return (LINUX_AF_IPX); - case AF_APPLETALK: - return (LINUX_AF_APPLETALK); - } - return (-1); -} - -static int linux_to_bsd_sockopt_level(int level) { @@ -458,72 +302,7 @@ linux_to_bsd_msg_flags(int flags) return (ret_flags); } -/* -* If bsd_to_linux_sockaddr() or linux_to_bsd_sockaddr() faults, then the -* native syscall will fault. Thus, we don't really need to check the -* return values for these functions. -*/ - static int -bsd_to_linux_sockaddr(struct sockaddr *arg) -{ - struct sockaddr sa; - size_t sa_len = sizeof(struct sockaddr); - int error, bdom; - - if ((error = copyin(arg, &sa, sa_len))) - return (error); - - bdom = bsd_to_linux_domain(sa.sa_family); - if (bdom == -1) - return (EAFNOSUPPORT); - - *(u_short *)&sa = bdom; - return (copyout(&sa, arg, sa_len)); -} - -static int -linux_to_bsd_sockaddr(struct sockaddr *arg, int len) -{ - struct sockaddr sa; - size_t sa_len = sizeof(struct sockaddr); - int error, bdom; - - if ((error = copyin(arg, &sa, sa_len))) - return (error); - - bdom = linux_to_bsd_domain(*(sa_family_t *)&sa); - if (bdom == -1) - return (EAFNOSUPPORT); - - sa.sa_family = bdom; - sa.sa_len = len; - return (copyout(&sa, arg, sa_len)); -} - -static int -linux_sa_put(struct osockaddr *osa) -{ - struct osockaddr sa; - int error, bdom; - - /* - * Only read/write the osockaddr family part, the rest is - * not changed. - */ - error = copyin(osa, &sa, sizeof(sa.sa_family)); - if (error != 0) - return (error); - - bdom = bsd_to_linux_domain(sa.sa_family); - if (bdom == -1) - return (EINVAL); - - sa.sa_family = bdom; - return (copyout(&sa, osa, sizeof(sa.sa_family))); -} - -static int linux_to_bsd_cmsg_type(int cmsg_type) { @@ -616,10 +395,11 @@ linux_sendit(struct thread *td, int s, struct msghdr * struct mbuf *control, enum uio_seg segflg) { struct sockaddr *to; - int error; + int error, len; if (mp->msg_name != NULL) { - error = linux_getsockaddr(&to, mp->msg_name, mp->msg_namelen); + len = mp->msg_namelen; + error = linux_to_bsd_sockaddr(mp->msg_name, &to, &len); if (error != 0) return (error); mp->msg_name = to; @@ -758,13 +538,15 @@ linux_bind(struct thread *td, struct linux_bind_args * struct sockaddr *sa; int error; - error = linux_getsockaddr(&sa, PTRIN(args->name), - args->namelen); + error = linux_to_bsd_sockaddr(PTRIN(args->name), &sa, + &args->namelen); if (error != 0) return (error); error = kern_bindat(td, AT_FDCWD, args->s, sa); free(sa, M_SONAME); + + /* XXX */ if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in)) return (EINVAL); return (error); @@ -779,8 +561,8 @@ linux_connect(struct thread *td, struct linux_connect_ u_int fflag; int error; - error = linux_getsockaddr(&sa, (struct osockaddr *)PTRIN(args->name), - args->namelen); + error = linux_to_bsd_sockaddr(PTRIN(args->name), &sa, + &args->namelen); if (error != 0) return (error); @@ -824,43 +606,67 @@ static int linux_accept_common(struct thread *td, int s, l_uintptr_t addr, l_uintptr_t namelen, int flags) { - struct accept4_args /* { - int s; - struct sockaddr * __restrict name; - socklen_t * __restrict anamelen; - int flags; - } */ bsd_args; - struct socket *so; + struct l_sockaddr *lsa; + struct sockaddr *sa; struct file *fp; + int bflags, len; + struct socket *so; int error, error1; - bsd_args.s = s; - bsd_args.name = (struct sockaddr * __restrict)PTRIN(addr); - bsd_args.anamelen = PTRIN(namelen); - bsd_args.flags = 0; - error = linux_set_socket_flags(flags, &bsd_args.flags); + bflags = 0; + error = linux_set_socket_flags(flags, &bflags); if (error != 0) return (error); - error = sys_accept4(td, &bsd_args); - bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.name); + + sa = NULL; + if (PTRIN(addr) == NULL) { + len = 0; + error = kern_accept4(td, s, NULL, NULL, bflags, NULL); + } else { + error = copyin(PTRIN(namelen), &len, sizeof(len)); + if (error != 0) + return (error); + if (len < 0) + return (EINVAL); + error = kern_accept4(td, s, &sa, &len, bflags, &fp); + if (error == 0) + fdrop(fp, td); + } + if (error != 0) { + /* + * XXX. This is wrong, different sockaddr structures + * have different sizes. + */ if (error == EFAULT && namelen != sizeof(struct sockaddr_in)) - return (EINVAL); + { + error = EINVAL; + goto out; + } if (error == EINVAL) { error1 = getsock_cap(td, s, &cap_accept_rights, &fp, NULL, NULL); - if (error1 != 0) - return (error1); - so = fp->f_data; - if (so->so_type == SOCK_DGRAM) { - fdrop(fp, td); - return (EOPNOTSUPP); + if (error1 != 0) { + error = error1; + goto out; } + so = fp->f_data; + if (so->so_type == SOCK_DGRAM) + error = EOPNOTSUPP; fdrop(fp, td); } - return (error); + goto out; } - if (addr) - error = linux_sa_put(PTRIN(addr)); + + if (len != 0 && error == 0) { + error = bsd_to_linux_sockaddr(sa, &lsa, len); + if (error == 0) + error = copyout(lsa, PTRIN(addr), len); + free(lsa, M_SONAME); + } + + free(sa, M_SONAME); + +out: if (error != 0) { (void)kern_close(td, td->td_retval[0]); td->td_retval[0] = 0; @@ -887,41 +693,59 @@ linux_accept4(struct thread *td, struct linux_accept4_ int linux_getsockname(struct thread *td, struct linux_getsockname_args *args) { - struct getsockname_args /* { - int fdes; - struct sockaddr * __restrict asa; - socklen_t * __restrict alen; - } */ bsd_args; - int error; + struct l_sockaddr *lsa; + struct sockaddr *sa; + int len, error; - bsd_args.fdes = args->s; - bsd_args.asa = (struct sockaddr * __restrict)PTRIN(args->addr); - bsd_args.alen = PTRIN(args->namelen); - error = sys_getsockname(td, &bsd_args); - bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); + error = copyin(PTRIN(args->namelen), &len, sizeof(len)); if (error != 0) return (error); - return (linux_sa_put(PTRIN(args->addr))); + + error = kern_getsockname(td, args->s, &sa, &len); + if (error != 0) + return (error); + + if (len != 0) { + error = bsd_to_linux_sockaddr(sa, &lsa, len); + if (error == 0) + error = copyout(lsa, PTRIN(args->addr), + len); + free(lsa, M_SONAME); + } + + free(sa, M_SONAME); + if (error == 0) + error = copyout(&len, PTRIN(args->namelen), sizeof(len)); + return (error); } int linux_getpeername(struct thread *td, struct linux_getpeername_args *args) { - struct getpeername_args /* { - int fdes; - caddr_t asa; - int *alen; - } */ bsd_args; - int error; + struct l_sockaddr *lsa; + struct sockaddr *sa; + int len, error; - bsd_args.fdes = args->s; - bsd_args.asa = (struct sockaddr *)PTRIN(args->addr); - bsd_args.alen = (socklen_t *)PTRIN(args->namelen); - error = sys_getpeername(td, &bsd_args); - bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); + error = copyin(PTRIN(args->namelen), &len, sizeof(len)); if (error != 0) return (error); - return (linux_sa_put(PTRIN(args->addr))); + + error = kern_getpeername(td, args->s, &sa, &len); + if (error != 0) + return (error); + + if (len != 0) { + error = bsd_to_linux_sockaddr(sa, &lsa, len); + if (error == 0) + error = copyout(lsa, PTRIN(args->addr), + len); + free(lsa, M_SONAME); + } + + free(sa, M_SONAME); + if (error == 0) + error = copyout(&len, PTRIN(args->namelen), sizeof(len)); + return (error); } int @@ -1043,6 +867,8 @@ linux_sendto(struct thread *td, struct linux_sendto_ar int linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args) { + struct l_sockaddr *lsa; + struct sockaddr *sa; struct msghdr msg; struct iovec aiov; int error, fromlen; @@ -1054,11 +880,14 @@ linux_recvfrom(struct thread *td, struct linux_recvfro return (error); if (fromlen < 0) return (EINVAL); - msg.msg_namelen = fromlen; - } else - msg.msg_namelen = 0; + sa = malloc(fromlen, M_SONAME, M_WAITOK); + } else { + fromlen = 0; + sa = NULL; + } - msg.msg_name = (struct sockaddr * __restrict)PTRIN(args->from); + msg.msg_name = sa; + msg.msg_namelen = fromlen; msg.msg_iov = &aiov; msg.msg_iovlen = 1; aiov.iov_base = PTRIN(args->buf); @@ -1066,24 +895,23 @@ linux_recvfrom(struct thread *td, struct linux_recvfro msg.msg_control = 0; msg.msg_flags = linux_to_bsd_msg_flags(args->flags); - error = kern_recvit(td, args->s, &msg, UIO_USERSPACE, NULL); + error = kern_recvit(td, args->s, &msg, UIO_SYSSPACE, NULL); if (error != 0) return (error); if (PTRIN(args->from) != NULL) { - error = bsd_to_linux_sockaddr((struct sockaddr *) - PTRIN(args->from)); - if (error != 0) - return (error); - - error = linux_sa_put((struct osockaddr *) - PTRIN(args->from)); + error = bsd_to_linux_sockaddr(sa, &lsa, msg.msg_namelen); + if (error == 0) + error = copyout(lsa, PTRIN(args->from), + msg.msg_namelen); + free(lsa, M_SONAME); } - if (PTRIN(args->fromlen) != NULL) + if (error == 0 && PTRIN(args->fromlen) != NULL) error = copyout(&msg.msg_namelen, PTRIN(args->fromlen), sizeof(msg.msg_namelen)); + free(sa, M_SONAME); return (error); } @@ -1289,6 +1117,8 @@ linux_recvmsg_common(struct thread *td, l_int s, struc struct mbuf *control = NULL; struct mbuf **controlp; struct timeval *ftmvl; + struct l_sockaddr *lsa; + struct sockaddr *sa; l_timeval ltmvl; caddr_t outbuf; void *data; @@ -1312,36 +1142,34 @@ linux_recvmsg_common(struct thread *td, l_int s, struc return (error); if (msg->msg_name) { - error = linux_to_bsd_sockaddr((struct sockaddr *)msg->msg_name, - msg->msg_namelen); - if (error != 0) - goto bad; + sa = malloc(msg->msg_namelen, M_SONAME, M_WAITOK); + msg->msg_name = sa; } uiov = msg->msg_iov; msg->msg_iov = iov; controlp = (msg->msg_control != NULL) ? &control : NULL; - error = kern_recvit(td, s, msg, UIO_USERSPACE, controlp); + error = kern_recvit(td, s, msg, UIO_SYSSPACE, controlp); msg->msg_iov = uiov; if (error != 0) goto bad; - error = bsd_to_linux_msghdr(msg, &linux_msg); - if (error != 0) - goto bad; - - if (linux_msg.msg_name) { - error = bsd_to_linux_sockaddr((struct sockaddr *) - PTRIN(linux_msg.msg_name)); + if (sa) { + msg->msg_name = PTRIN(linux_msg.msg_name); + error = bsd_to_linux_sockaddr(sa, &lsa, msg->msg_namelen); + if (error == 0) + error = copyout(lsa, PTRIN(msg->msg_name), + msg->msg_namelen); + free(lsa, M_SONAME); + free(sa, M_SONAME); if (error != 0) goto bad; } - if (linux_msg.msg_name && linux_msg.msg_namelen > 2) { - error = linux_sa_put(PTRIN(linux_msg.msg_name)); - if (error != 0) - goto bad; - } + error = bsd_to_linux_msghdr(msg, &linux_msg); + if (error != 0) + goto bad; + maxlen = linux_msg.msg_controllen; linux_msg.msg_controllen = 0; if (control) { @@ -1544,7 +1372,9 @@ linux_setsockopt(struct thread *td, struct linux_setso int valsize; } */ bsd_args; l_timeval linux_tv; + struct sockaddr *sa; struct timeval tv; + socklen_t len; int error, name; bsd_args.s = args->s; @@ -1593,17 +1423,23 @@ linux_setsockopt(struct thread *td, struct linux_setso if (name == -1) return (ENOPROTOOPT); - bsd_args.name = name; - bsd_args.val = PTRIN(args->optval); - bsd_args.valsize = args->optlen; if (name == IPV6_NEXTHOP) { - linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val, - bsd_args.valsize); + + len = args->optlen; + error = linux_to_bsd_sockaddr(PTRIN(args->optval), &sa, &len); + if (error != 0) + return (error); + + error = kern_setsockopt(td, args->s, bsd_args.level, + name, sa, UIO_SYSSPACE, len); + free(sa, M_SONAME); + } else { + bsd_args.name = name; + bsd_args.val = PTRIN(args->optval); + bsd_args.valsize = args->optlen; error = sys_setsockopt(td, &bsd_args); - bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); - } else - error = sys_setsockopt(td, &bsd_args); + } return (error); } @@ -1621,6 +1457,8 @@ linux_getsockopt(struct thread *td, struct linux_getso l_timeval linux_tv; struct timeval tv; socklen_t tv_len, xulen, len; + struct l_sockaddr *lsa; + struct sockaddr *sa; struct xucred xu; struct l_ucred lxu; int error, name, newval; @@ -1695,14 +1533,32 @@ linux_getsockopt(struct thread *td, struct linux_getso return (EINVAL); bsd_args.name = name; - bsd_args.val = PTRIN(args->optval); bsd_args.avalsize = PTRIN(args->optlen); if (name == IPV6_NEXTHOP) { + error = copyin(PTRIN(args->optlen), &len, sizeof(len)); + if (error != 0) + return (error); + sa = malloc(len, M_SONAME, M_WAITOK); + + error = kern_getsockopt(td, args->s, bsd_args.level, + name, sa, UIO_SYSSPACE, &len); + if (error != 0) + goto out; + + error = bsd_to_linux_sockaddr(sa, &lsa, len); + if (error == 0) + error = copyout(lsa, PTRIN(args->optval), len); + free(lsa, M_SONAME); + if (error == 0) + error = copyout(&len, PTRIN(args->optlen), + sizeof(len)); +out: + free(sa, M_SONAME); + } else { + bsd_args.val = PTRIN(args->optval); error = sys_getsockopt(td, &bsd_args); - bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); - } else - error = sys_getsockopt(td, &bsd_args); + } return (error); } Modified: stable/12/sys/compat/linux/linux_socket.h ============================================================================== --- stable/12/sys/compat/linux/linux_socket.h Mon Aug 24 14:58:58 2020 (r364692) +++ stable/12/sys/compat/linux/linux_socket.h Mon Aug 24 15:45:42 2020 (r364693) @@ -109,16 +109,6 @@ struct l_cmsghdr { #define CMSG_HDRSZ CMSG_LEN(0) #define L_CMSG_HDRSZ LINUX_CMSG_LEN(0) -/* Supported address families */ - -#define LINUX_AF_UNSPEC 0 -#define LINUX_AF_UNIX 1 -#define LINUX_AF_INET 2 -#define LINUX_AF_AX25 3 -#define LINUX_AF_IPX 4 -#define LINUX_AF_APPLETALK 5 -#define LINUX_AF_INET6 10 - /* Supported socket types */ #define LINUX_SOCK_STREAM 1 Modified: stable/12/sys/modules/linux_common/Makefile ============================================================================== --- stable/12/sys/modules/linux_common/Makefile Mon Aug 24 14:58:58 2020 (r364692) +++ stable/12/sys/modules/linux_common/Makefile Mon Aug 24 15:45:42 2020 (r364693) @@ -5,7 +5,7 @@ KMOD= linux_common SRCS= linux_common.c linux_mib.c linux_mmap.c linux_util.c linux_emul.c \ linux_errno.c \ - linux.c device_if.h vnode_if.h bus_if.h + linux.c device_if.h vnode_if.h bus_if.h opt_inet6.h EXPORT_SYMS= EXPORT_SYMS+= linux_emul_path
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