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net/compat.c
25.9 KB
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/* |
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* 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> |
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* Copyright (C) 2000,2001 Andi Kleen, SuSE Labs |
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*/ #include <linux/kernel.h> |
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#include <linux/gfp.h> |
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#include <linux/fs.h> |
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#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> |
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#include <linux/security.h> |
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#include <linux/audit.h> |
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#include <linux/export.h> |
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#include <net/scm.h> #include <net/sock.h> |
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#include <net/ip.h> #include <net/ipv6.h> |
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#include <linux/uaccess.h> |
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#include <net/compat.h> |
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int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg, struct sockaddr __user **save_addr, struct iovec **iov) |
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{ |
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struct compat_msghdr msg; |
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ssize_t err; |
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|
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if (copy_from_user(&msg, umsg, sizeof(*umsg))) |
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return -EFAULT; |
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|
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kmsg->msg_flags = msg.msg_flags; kmsg->msg_namelen = msg.msg_namelen; if (!msg.msg_name) |
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kmsg->msg_namelen = 0; if (kmsg->msg_namelen < 0) return -EINVAL; |
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if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
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kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
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kmsg->msg_control = compat_ptr(msg.msg_control); kmsg->msg_controllen = msg.msg_controllen; |
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|
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if (save_addr) |
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*save_addr = compat_ptr(msg.msg_name); |
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|
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if (msg.msg_name && kmsg->msg_namelen) { |
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if (!save_addr) { |
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err = move_addr_to_kernel(compat_ptr(msg.msg_name), |
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kmsg->msg_namelen, kmsg->msg_name); |
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if (err < 0) |
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return err; } |
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} else { |
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kmsg->msg_name = NULL; kmsg->msg_namelen = 0; |
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} |
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|
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if (msg.msg_iovlen > UIO_MAXIOV) |
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return -EMSGSIZE; |
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kmsg->msg_iocb = NULL; |
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return compat_import_iovec(save_addr ? READ : WRITE, |
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compat_ptr(msg.msg_iov), msg.msg_iovlen, |
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UIO_FASTIOV, iov, &kmsg->msg_iter); |
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} /* Bleech... */ #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) #define CMSG_COMPAT_DATA(cmsg) \ |
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((void __user *)((char __user *)(cmsg) + sizeof(struct compat_cmsghdr))) |
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#define CMSG_COMPAT_SPACE(len) \ |
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(sizeof(struct compat_cmsghdr) + CMSG_COMPAT_ALIGN(len)) |
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#define CMSG_COMPAT_LEN(len) \ |
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(sizeof(struct compat_cmsghdr) + (len)) |
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#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 */ |
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int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, |
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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; |
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int err = -EFAULT; |
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|
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BUILD_BUG_ON(sizeof(struct compat_cmsghdr) != CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))); |
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kcmlen = 0; kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); |
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while (ucmsg != NULL) { if (get_user(ucmlen, &ucmsg->cmsg_len)) |
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return -EFAULT; /* Catch bogons. */ if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) return -EINVAL; |
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tmp = ((ucmlen - sizeof(*ucmsg)) + sizeof(struct cmsghdr)); |
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tmp = CMSG_ALIGN(tmp); |
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kcmlen += tmp; ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); } |
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if (kcmlen == 0) |
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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. */ |
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if (kcmlen > stackbuf_size) kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); if (kcmsg == NULL) |
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return -ENOBUFS; /* Now copy them over neatly. */ memset(kcmsg, 0, kcmlen); ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); |
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while (ucmsg != NULL) { |
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if (__get_user(ucmlen, &ucmsg->cmsg_len)) goto Efault; if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) goto Einval; |
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tmp = ((ucmlen - sizeof(*ucmsg)) + sizeof(struct cmsghdr)); |
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if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) goto Einval; |
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kcmsg->cmsg_len = tmp; |
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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), |
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(ucmlen - sizeof(*ucmsg)))) |
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goto Efault; |
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/* Advance. */ |
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kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); |
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ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); } |
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/* * 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; |
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/* Ok, looks like we made it. Hook it up and return success. */ kmsg->msg_control = kcmsg_base; kmsg->msg_controllen = kcmlen; return 0; |
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Einval: err = -EINVAL; Efault: if (kcmsg_base != (struct cmsghdr *)stackbuf) sock_kfree_s(sk, kcmsg_base, kcmlen); return err; |
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} int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) { |
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struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; struct compat_cmsghdr cmhdr; |
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struct compat_timeval ctv; struct compat_timespec cts[3]; |
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int cmlen; |
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if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { |
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kmsg->msg_flags |= MSG_CTRUNC; return 0; /* XXX: return error? check spec. */ } |
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if (!COMPAT_USE_64BIT_TIME) { |
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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; |
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} |
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} |
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cmlen = CMSG_COMPAT_LEN(len); |
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if (kmsg->msg_controllen < cmlen) { |
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kmsg->msg_flags |= MSG_CTRUNC; cmlen = kmsg->msg_controllen; } cmhdr.cmsg_level = level; cmhdr.cmsg_type = type; cmhdr.cmsg_len = cmlen; |
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if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) |
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return -EFAULT; |
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if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) |
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return -EFAULT; cmlen = CMSG_COMPAT_SPACE(len); |
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if (kmsg->msg_controllen < cmlen) cmlen = kmsg->msg_controllen; |
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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; |
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err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags ? O_CLOEXEC : 0); |
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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. */ |
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fd_install(new_fd, get_file(fp[i])); |
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} if (i > 0) { int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); |
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err = put_user(SOL_SOCKET, &cm->cmsg_level); |
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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); } |
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/* 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) |
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{ struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; |
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struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); |
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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))) |
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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) |
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return -EFAULT; |
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return sock_setsockopt(sock, level, optname, (char __user *)kfprog, |
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sizeof(struct sock_fprog)); } |
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static int do_set_sock_timeout(struct socket *sock, int level, |
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int optname, char __user *optval, unsigned int optlen) |
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{ |
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struct compat_timeval __user *up = (struct compat_timeval __user *)optval; |
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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); |
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err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime)); |
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set_fs(old_fs); return err; } |
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static int compat_sock_setsockopt(struct socket *sock, int level, int optname, |
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char __user *optval, unsigned int optlen) |
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{ |
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if (optname == SO_ATTACH_FILTER || optname == SO_ATTACH_REUSEPORT_CBPF) |
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return do_set_attach_filter(sock, level, optname, optval, optlen); |
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if (!COMPAT_USE_64BIT_TIME && (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)) |
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return do_set_sock_timeout(sock, level, optname, optval, optlen); return sock_setsockopt(sock, level, optname, optval, optlen); } |
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static int __compat_sys_setsockopt(int fd, int level, int optname, char __user *optval, unsigned int optlen) |
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{ |
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int err; |
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struct socket *sock = sockfd_lookup(fd, &err); |
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|
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if (sock) { err = security_socket_setsockopt(sock, level, optname); |
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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; |
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} |
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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); } |
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static int do_get_sock_timeout(struct socket *sock, int level, int optname, |
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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); |
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err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); |
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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; } |
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static int compat_sock_getsockopt(struct socket *sock, int level, int optname, |
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char __user *optval, int __user *optlen) { |
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if (!COMPAT_USE_64BIT_TIME && (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)) |
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return do_get_sock_timeout(sock, level, optname, optval, optlen); return sock_getsockopt(sock, level, optname, optval, optlen); |
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} |
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int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) { |
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struct compat_timeval __user *ctv; int err; |
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struct timeval tv; |
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if (COMPAT_USE_64BIT_TIME) return sock_get_timestamp(sk, userstamp); ctv = (struct compat_timeval __user *) userstamp; err = -ENOENT; |
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sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
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tv = ktime_to_timeval(sock_read_timestamp(sk)); |
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if (tv.tv_sec == -1) |
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return err; |
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if (tv.tv_sec == 0) { |
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ktime_t kt = ktime_get_real(); sock_write_timestamp(sk, kt); tv = ktime_to_timeval(kt); |
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} err = 0; if (put_user(tv.tv_sec, &ctv->tv_sec) || put_user(tv.tv_usec, &ctv->tv_usec)) |
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err = -EFAULT; return err; } EXPORT_SYMBOL(compat_sock_get_timestamp); |
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int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) { |
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struct compat_timespec __user *ctv; int err; |
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struct timespec ts; |
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if (COMPAT_USE_64BIT_TIME) return sock_get_timestampns (sk, userstamp); ctv = (struct compat_timespec __user *) userstamp; err = -ENOENT; |
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sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
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ts = ktime_to_timespec(sock_read_timestamp(sk)); |
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475 476 477 |
if (ts.tv_sec == -1) return err; if (ts.tv_sec == 0) { |
60f05dddf
|
478 479 480 |
ktime_t kt = ktime_get_real(); sock_write_timestamp(sk, kt); ts = ktime_to_timespec(kt); |
ae40eb1ef
|
481 482 483 484 485 486 487 488 |
} 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); |
8770cf4a5
|
489 490 491 |
static int __compat_sys_getsockopt(int fd, int level, int optname, char __user *optval, int __user *optlen) |
3fdadf7d2
|
492 493 |
{ int err; |
c6d409cfd
|
494 |
struct socket *sock = sockfd_lookup(fd, &err); |
3fdadf7d2
|
495 |
|
c6d409cfd
|
496 497 |
if (sock) { err = security_socket_getsockopt(sock, level, optname); |
3fdadf7d2
|
498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 |
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; } |
dae502954
|
516 |
|
8770cf4a5
|
517 518 519 520 521 |
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); } |
dae502954
|
522 523 524 |
struct compat_group_req { __u32 gr_interface; struct __kernel_sockaddr_storage gr_group |
e099b2d9d
|
525 |
__aligned(4); |
bc10502db
|
526 |
} __packed; |
dae502954
|
527 528 529 530 |
struct compat_group_source_req { __u32 gsr_interface; struct __kernel_sockaddr_storage gsr_group |
e099b2d9d
|
531 |
__aligned(4); |
dae502954
|
532 |
struct __kernel_sockaddr_storage gsr_source |
e099b2d9d
|
533 |
__aligned(4); |
bc10502db
|
534 |
} __packed; |
dae502954
|
535 536 537 538 |
struct compat_group_filter { __u32 gf_interface; struct __kernel_sockaddr_storage gf_group |
e099b2d9d
|
539 |
__aligned(4); |
dae502954
|
540 541 542 |
__u32 gf_fmode; __u32 gf_numsrc; struct __kernel_sockaddr_storage gf_slist[1] |
e099b2d9d
|
543 |
__aligned(4); |
bc10502db
|
544 |
} __packed; |
dae502954
|
545 |
|
be666e0a1
|
546 547 |
#define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \ sizeof(struct __kernel_sockaddr_storage)) |
dae502954
|
548 549 |
int compat_mc_setsockopt(struct sock *sock, int level, int optname, |
b7058842c
|
550 |
char __user *optval, unsigned int optlen, |
c6d409cfd
|
551 |
int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int)) |
dae502954
|
552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 |
{ 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; |
be666e0a1
|
582 |
struct group_source_req __user *kgsr = compat_alloc_user_space( |
dae502954
|
583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 |
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; |
be666e0a1
|
603 |
struct group_filter __user *kgf; |
dae502954
|
604 |
u32 interface, fmode, numsrc; |
be666e0a1
|
605 |
if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || |
dae502954
|
606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 |
__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)) || |
be666e0a1
|
621 |
(numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist, |
dae502954
|
622 623 624 625 626 627 628 629 630 631 632 |
numsrc * sizeof(kgf->gf_slist[0])))) return -EFAULT; koptval = (char __user *)kgf; break; } default: break; } return setsockopt(sock, level, optname, koptval, koptlen); } |
dae502954
|
633 |
EXPORT_SYMBOL(compat_mc_setsockopt); |
42908c69f
|
634 635 |
int compat_mc_getsockopt(struct sock *sock, int level, int optname, char __user *optval, int __user *optlen, |
c6d409cfd
|
636 |
int (*getsockopt)(struct sock *, int, int, char __user *, int __user *)) |
42908c69f
|
637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 |
{ 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) || |
c6d409cfd
|
672 |
copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group))) |
42908c69f
|
673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 |
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; |
c6d409cfd
|
705 |
if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen)) |
42908c69f
|
706 707 708 709 |
return -EFAULT; } return err; } |
42908c69f
|
710 |
EXPORT_SYMBOL(compat_mc_getsockopt); |
dae502954
|
711 |
|
1da177e4c
|
712 713 |
/* Argument list sizes for compat_sys_socketcall */ #define AL(x) ((x) * sizeof(u32)) |
228e548e6
|
714 |
static unsigned char nas[21] = { |
c6d409cfd
|
715 716 717 |
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), |
228e548e6
|
718 |
AL(4), AL(5), AL(4) |
c6d409cfd
|
719 |
}; |
1da177e4c
|
720 |
#undef AL |
6df354653
|
721 722 723 |
static inline long __compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags) |
1da177e4c
|
724 |
{ |
e1834a329
|
725 726 |
return __sys_sendmsg(fd, (struct user_msghdr __user *)msg, flags | MSG_CMSG_COMPAT, false); |
1da177e4c
|
727 |
} |
6df354653
|
728 729 730 731 732 733 734 735 736 |
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) |
228e548e6
|
737 738 |
{ return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, |
e1834a329
|
739 |
flags | MSG_CMSG_COMPAT, false); |
228e548e6
|
740 |
} |
6df354653
|
741 742 743 744 745 746 747 748 749 |
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) |
1da177e4c
|
750 |
{ |
e1834a329
|
751 752 |
return __sys_recvmsg(fd, (struct user_msghdr __user *)msg, flags | MSG_CMSG_COMPAT, false); |
1da177e4c
|
753 |
} |
6df354653
|
754 755 756 757 758 |
COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags) { return __compat_sys_recvmsg(fd, msg, flags); } |
fd4e82f5b
|
759 760 761 762 763 764 765 766 |
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); } |
3a49a0f71
|
767 |
COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags) |
1dacc76d0
|
768 |
{ |
fd4e82f5b
|
769 |
return __compat_sys_recvfrom(fd, buf, len, flags, NULL, NULL); |
1dacc76d0
|
770 |
} |
3a49a0f71
|
771 772 773 |
COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags, struct sockaddr __user *, addr, int __user *, addrlen) |
1dacc76d0
|
774 |
{ |
fd4e82f5b
|
775 |
return __compat_sys_recvfrom(fd, buf, len, flags, addr, addrlen); |
1dacc76d0
|
776 |
} |
157b334aa
|
777 778 779 |
static int __compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg, unsigned int vlen, unsigned int flags, struct compat_timespec __user *timeout) |
a2e272554
|
780 781 782 |
{ int datagrams; struct timespec ktspec; |
a2e272554
|
783 |
|
5b23136bc
|
784 785 786 |
if (timeout == NULL) return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, flags | MSG_CMSG_COMPAT, NULL); |
2def2ef2a
|
787 |
if (compat_get_timespec(&ktspec, timeout)) |
a2e272554
|
788 789 790 791 |
return -EFAULT; datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, flags | MSG_CMSG_COMPAT, &ktspec); |
2def2ef2a
|
792 |
if (datagrams > 0 && compat_put_timespec(&ktspec, timeout)) |
a2e272554
|
793 794 795 796 |
datagrams = -EFAULT; return datagrams; } |
157b334aa
|
797 798 799 800 801 802 |
COMPAT_SYSCALL_DEFINE5(recvmmsg, int, fd, struct compat_mmsghdr __user *, mmsg, unsigned int, vlen, unsigned int, flags, struct compat_timespec __user *, timeout) { return __compat_sys_recvmmsg(fd, mmsg, vlen, flags, timeout); } |
361d93c46
|
803 |
COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args) |
1da177e4c
|
804 |
{ |
62bc306e2
|
805 806 |
u32 a[AUDITSC_ARGS]; unsigned int len; |
1da177e4c
|
807 |
u32 a0, a1; |
62bc306e2
|
808 |
int ret; |
4768fbcbc
|
809 |
|
228e548e6
|
810 |
if (call < SYS_SOCKET || call > SYS_SENDMMSG) |
1da177e4c
|
811 |
return -EINVAL; |
62bc306e2
|
812 813 814 815 816 |
len = nas[call]; if (len > sizeof(a)) return -EINVAL; if (copy_from_user(a, args, len)) |
1da177e4c
|
817 |
return -EFAULT; |
62bc306e2
|
818 819 820 821 |
ret = audit_socketcall_compat(len / sizeof(a[0]), a); if (ret) return ret; |
1da177e4c
|
822 823 |
a0 = a[0]; a1 = a[1]; |
4768fbcbc
|
824 |
|
e71a4783a
|
825 |
switch (call) { |
1da177e4c
|
826 |
case SYS_SOCKET: |
9d6a15c3f
|
827 |
ret = __sys_socket(a0, a1, a[2]); |
1da177e4c
|
828 829 |
break; case SYS_BIND: |
a87d35d87
|
830 |
ret = __sys_bind(a0, compat_ptr(a1), a[2]); |
1da177e4c
|
831 832 |
break; case SYS_CONNECT: |
1387c2c2f
|
833 |
ret = __sys_connect(a0, compat_ptr(a1), a[2]); |
1da177e4c
|
834 835 |
break; case SYS_LISTEN: |
25e290eed
|
836 |
ret = __sys_listen(a0, a1); |
1da177e4c
|
837 838 |
break; case SYS_ACCEPT: |
4541e8056
|
839 |
ret = __sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0); |
1da177e4c
|
840 841 |
break; case SYS_GETSOCKNAME: |
8882a107b
|
842 |
ret = __sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); |
1da177e4c
|
843 844 |
break; case SYS_GETPEERNAME: |
b21c8f838
|
845 |
ret = __sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); |
1da177e4c
|
846 847 |
break; case SYS_SOCKETPAIR: |
6debc8d83
|
848 |
ret = __sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); |
1da177e4c
|
849 850 |
break; case SYS_SEND: |
f3bf896b1
|
851 |
ret = __sys_sendto(a0, compat_ptr(a1), a[2], a[3], NULL, 0); |
1da177e4c
|
852 853 |
break; case SYS_SENDTO: |
211b634b7
|
854 855 |
ret = __sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); |
1da177e4c
|
856 857 |
break; case SYS_RECV: |
fd4e82f5b
|
858 859 |
ret = __compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], NULL, NULL); |
1da177e4c
|
860 861 |
break; case SYS_RECVFROM: |
fd4e82f5b
|
862 863 864 |
ret = __compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), compat_ptr(a[5])); |
1da177e4c
|
865 866 |
break; case SYS_SHUTDOWN: |
005a1aeac
|
867 |
ret = __sys_shutdown(a0, a1); |
1da177e4c
|
868 869 |
break; case SYS_SETSOCKOPT: |
73ee3eafd
|
870 871 |
ret = __compat_sys_setsockopt(a0, a1, a[2], compat_ptr(a[3]), a[4]); |
1da177e4c
|
872 873 |
break; case SYS_GETSOCKOPT: |
8770cf4a5
|
874 875 876 |
ret = __compat_sys_getsockopt(a0, a1, a[2], compat_ptr(a[3]), compat_ptr(a[4])); |
1da177e4c
|
877 878 |
break; case SYS_SENDMSG: |
6df354653
|
879 |
ret = __compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); |
1da177e4c
|
880 |
break; |
228e548e6
|
881 |
case SYS_SENDMMSG: |
6df354653
|
882 |
ret = __compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]); |
228e548e6
|
883 |
break; |
1da177e4c
|
884 |
case SYS_RECVMSG: |
6df354653
|
885 |
ret = __compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); |
1da177e4c
|
886 |
break; |
a2e272554
|
887 |
case SYS_RECVMMSG: |
157b334aa
|
888 889 |
ret = __compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4])); |
a2e272554
|
890 |
break; |
de11defeb
|
891 |
case SYS_ACCEPT4: |
4541e8056
|
892 |
ret = __sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); |
aaca0bdca
|
893 |
break; |
1da177e4c
|
894 895 896 897 898 899 |
default: ret = -EINVAL; break; } return ret; } |