^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * 32bit Socket syscall emulation. Based on arch/sparc64/kernel/sys_sparc32.c.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2000 VA Linux Co
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Copyright (C) 2000 Hewlett-Packard Co.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Copyright (C) 2000,2001 Andi Kleen, SuSE Labs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/gfp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/icmpv6.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/socket.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/syscalls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/filter.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/compat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/security.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/audit.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <net/scm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <net/ip.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <net/ipv6.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <net/compat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) int __get_compat_msghdr(struct msghdr *kmsg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct compat_msghdr __user *umsg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct sockaddr __user **save_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) compat_uptr_t *ptr, compat_size_t *len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct compat_msghdr msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) ssize_t err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) if (copy_from_user(&msg, umsg, sizeof(*umsg)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) kmsg->msg_flags = msg.msg_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) kmsg->msg_namelen = msg.msg_namelen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) if (!msg.msg_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) kmsg->msg_namelen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) if (kmsg->msg_namelen < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (kmsg->msg_namelen > sizeof(struct sockaddr_storage))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) kmsg->msg_namelen = sizeof(struct sockaddr_storage);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) kmsg->msg_control_is_user = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) kmsg->msg_control_user = compat_ptr(msg.msg_control);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) kmsg->msg_controllen = msg.msg_controllen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (save_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) *save_addr = compat_ptr(msg.msg_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (msg.msg_name && kmsg->msg_namelen) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) if (!save_addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) err = move_addr_to_kernel(compat_ptr(msg.msg_name),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) kmsg->msg_namelen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) kmsg->msg_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) kmsg->msg_name = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) kmsg->msg_namelen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (msg.msg_iovlen > UIO_MAXIOV)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) kmsg->msg_iocb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) *ptr = msg.msg_iov;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) *len = msg.msg_iovlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) int get_compat_msghdr(struct msghdr *kmsg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) struct compat_msghdr __user *umsg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) struct sockaddr __user **save_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) struct iovec **iov)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) compat_uptr_t ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) compat_size_t len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) ssize_t err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) err = __get_compat_msghdr(kmsg, umsg, save_addr, &ptr, &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) err = import_iovec(save_addr ? READ : WRITE, compat_ptr(ptr), len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) UIO_FASTIOV, iov, &kmsg->msg_iter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return err < 0 ? err : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) /* Bleech... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #define CMSG_COMPAT_DATA(cmsg) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) ((void __user *)((char __user *)(cmsg) + sizeof(struct compat_cmsghdr)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) #define CMSG_COMPAT_SPACE(len) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) (sizeof(struct compat_cmsghdr) + CMSG_COMPAT_ALIGN(len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) #define CMSG_COMPAT_LEN(len) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) (sizeof(struct compat_cmsghdr) + (len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #define CMSG_COMPAT_FIRSTHDR(msg) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) (struct compat_cmsghdr __user *)((msg)->msg_control) : \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) (struct compat_cmsghdr __user *)NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) ((ucmlen) >= sizeof(struct compat_cmsghdr) && \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) (ucmlen) <= (unsigned long) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) ((mhdr)->msg_controllen - \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) ((char __user *)(ucmsg) - (char __user *)(mhdr)->msg_control_user)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) struct compat_cmsghdr __user *cmsg, int cmsg_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) msg->msg_controllen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return (struct compat_cmsghdr __user *)ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) /* There is a lot of hair here because the alignment rules (and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) * thus placement) of cmsg headers and length are different for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) * 32-bit apps. -DaveM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) unsigned char *stackbuf, int stackbuf_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) struct compat_cmsghdr __user *ucmsg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) struct cmsghdr *kcmsg, *kcmsg_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) compat_size_t ucmlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) __kernel_size_t kcmlen, tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) int err = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) BUILD_BUG_ON(sizeof(struct compat_cmsghdr) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) kcmlen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) while (ucmsg != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) if (get_user(ucmlen, &ucmsg->cmsg_len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) /* Catch bogons. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) tmp = ((ucmlen - sizeof(*ucmsg)) + sizeof(struct cmsghdr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) tmp = CMSG_ALIGN(tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) kcmlen += tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (kcmlen == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) /* The kcmlen holds the 64-bit version of the control length.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) * It may not be modified as we do not stick it into the kmsg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) * until we have successfully copied over all of the data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) * from the user.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) if (kcmlen > stackbuf_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) if (kcmsg == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) /* Now copy them over neatly. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) memset(kcmsg, 0, kcmlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) while (ucmsg != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) struct compat_cmsghdr cmsg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) if (copy_from_user(&cmsg, ucmsg, sizeof(cmsg)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) goto Efault;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (!CMSG_COMPAT_OK(cmsg.cmsg_len, ucmsg, kmsg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) goto Einval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) tmp = ((cmsg.cmsg_len - sizeof(*ucmsg)) + sizeof(struct cmsghdr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) goto Einval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) kcmsg->cmsg_len = tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) kcmsg->cmsg_level = cmsg.cmsg_level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) kcmsg->cmsg_type = cmsg.cmsg_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) tmp = CMSG_ALIGN(tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) if (copy_from_user(CMSG_DATA(kcmsg),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) CMSG_COMPAT_DATA(ucmsg),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) (cmsg.cmsg_len - sizeof(*ucmsg))))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) goto Efault;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) /* Advance. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, cmsg.cmsg_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) * check the length of messages copied in is the same as the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) * what we get from the first loop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if ((char *)kcmsg - (char *)kcmsg_base != kcmlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) goto Einval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) /* Ok, looks like we made it. Hook it up and return success. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) kmsg->msg_control = kcmsg_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) kmsg->msg_controllen = kcmlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) Einval:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) Efault:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (kcmsg_base != (struct cmsghdr *)stackbuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) sock_kfree_s(sk, kcmsg_base, kcmlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) struct compat_cmsghdr cmhdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) struct old_timeval32 ctv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) struct old_timespec32 cts[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) int cmlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) kmsg->msg_flags |= MSG_CTRUNC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) return 0; /* XXX: return error? check spec. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) if (!COMPAT_USE_64BIT_TIME) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) if (level == SOL_SOCKET && type == SO_TIMESTAMP_OLD) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) struct __kernel_old_timeval *tv = (struct __kernel_old_timeval *)data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) ctv.tv_sec = tv->tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) ctv.tv_usec = tv->tv_usec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) data = &ctv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) len = sizeof(ctv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) if (level == SOL_SOCKET &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) (type == SO_TIMESTAMPNS_OLD || type == SO_TIMESTAMPING_OLD)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) int count = type == SO_TIMESTAMPNS_OLD ? 1 : 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) struct __kernel_old_timespec *ts = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) for (i = 0; i < count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) cts[i].tv_sec = ts[i].tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) cts[i].tv_nsec = ts[i].tv_nsec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) data = &cts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) len = sizeof(cts[0]) * count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) cmlen = CMSG_COMPAT_LEN(len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) if (kmsg->msg_controllen < cmlen) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) kmsg->msg_flags |= MSG_CTRUNC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) cmlen = kmsg->msg_controllen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) cmhdr.cmsg_level = level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) cmhdr.cmsg_type = type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) cmhdr.cmsg_len = cmlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) cmlen = CMSG_COMPAT_SPACE(len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) if (kmsg->msg_controllen < cmlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) cmlen = kmsg->msg_controllen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) kmsg->msg_control += cmlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) kmsg->msg_controllen -= cmlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) static int scm_max_fds_compat(struct msghdr *msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) if (msg->msg_controllen <= sizeof(struct compat_cmsghdr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) return (msg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) void scm_detach_fds_compat(struct msghdr *msg, struct scm_cookie *scm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) struct compat_cmsghdr __user *cm =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) (struct compat_cmsghdr __user *)msg->msg_control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) unsigned int o_flags = (msg->msg_flags & MSG_CMSG_CLOEXEC) ? O_CLOEXEC : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) int fdmax = min_t(int, scm_max_fds_compat(msg), scm->fp->count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) int __user *cmsg_data = CMSG_COMPAT_DATA(cm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) int err = 0, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) for (i = 0; i < fdmax; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) err = receive_fd_user(scm->fp->fp[i], cmsg_data + i, o_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (i > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) err = put_user(SOL_SOCKET, &cm->cmsg_level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) err = put_user(SCM_RIGHTS, &cm->cmsg_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) err = put_user(cmlen, &cm->cmsg_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) if (!err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) if (msg->msg_controllen < cmlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) cmlen = msg->msg_controllen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) msg->msg_control += cmlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) msg->msg_controllen -= cmlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) if (i < scm->fp->count || (scm->fp->count && fdmax <= 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) msg->msg_flags |= MSG_CTRUNC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) * All of the files that fit in the message have had their usage counts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) * incremented, so we just free the list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) __scm_destroy(scm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) /* Argument list sizes for compat_sys_socketcall */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) #define AL(x) ((x) * sizeof(u32))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) static unsigned char nas[21] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) AL(4), AL(5), AL(4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) #undef AL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) static inline long __compat_sys_sendmsg(int fd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) struct compat_msghdr __user *msg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) return __sys_sendmsg(fd, (struct user_msghdr __user *)msg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) flags | MSG_CMSG_COMPAT, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) COMPAT_SYSCALL_DEFINE3(sendmsg, int, fd, struct compat_msghdr __user *, msg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) unsigned int, flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) return __compat_sys_sendmsg(fd, msg, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) static inline long __compat_sys_sendmmsg(int fd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) struct compat_mmsghdr __user *mmsg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) unsigned int vlen, unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) flags | MSG_CMSG_COMPAT, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) COMPAT_SYSCALL_DEFINE4(sendmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) unsigned int, vlen, unsigned int, flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) return __compat_sys_sendmmsg(fd, mmsg, vlen, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) static inline long __compat_sys_recvmsg(int fd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) struct compat_msghdr __user *msg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) return __sys_recvmsg(fd, (struct user_msghdr __user *)msg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) flags | MSG_CMSG_COMPAT, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) unsigned int, flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) return __compat_sys_recvmsg(fd, msg, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) static inline long __compat_sys_recvfrom(int fd, void __user *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) compat_size_t len, unsigned int flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) struct sockaddr __user *addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) int __user *addrlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) return __sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) addrlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) return __compat_sys_recvfrom(fd, buf, len, flags, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) unsigned int, flags, struct sockaddr __user *, addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) int __user *, addrlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) return __compat_sys_recvfrom(fd, buf, len, flags, addr, addrlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) COMPAT_SYSCALL_DEFINE5(recvmmsg_time64, int, fd, struct compat_mmsghdr __user *, mmsg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) unsigned int, vlen, unsigned int, flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) struct __kernel_timespec __user *, timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) flags | MSG_CMSG_COMPAT, timeout, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) #ifdef CONFIG_COMPAT_32BIT_TIME
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) COMPAT_SYSCALL_DEFINE5(recvmmsg_time32, int, fd, struct compat_mmsghdr __user *, mmsg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) unsigned int, vlen, unsigned int, flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) struct old_timespec32 __user *, timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) flags | MSG_CMSG_COMPAT, NULL, timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) u32 a[AUDITSC_ARGS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) unsigned int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) u32 a0, a1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) if (call < SYS_SOCKET || call > SYS_SENDMMSG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) len = nas[call];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) if (len > sizeof(a))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) if (copy_from_user(a, args, len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) ret = audit_socketcall_compat(len / sizeof(a[0]), a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) a0 = a[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) a1 = a[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) switch (call) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) case SYS_SOCKET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) ret = __sys_socket(a0, a1, a[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) case SYS_BIND:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) ret = __sys_bind(a0, compat_ptr(a1), a[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) case SYS_CONNECT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) ret = __sys_connect(a0, compat_ptr(a1), a[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) case SYS_LISTEN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) ret = __sys_listen(a0, a1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) case SYS_ACCEPT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) ret = __sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) case SYS_GETSOCKNAME:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) ret = __sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) case SYS_GETPEERNAME:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) ret = __sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) case SYS_SOCKETPAIR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) ret = __sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) case SYS_SEND:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) ret = __sys_sendto(a0, compat_ptr(a1), a[2], a[3], NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) case SYS_SENDTO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) ret = __sys_sendto(a0, compat_ptr(a1), a[2], a[3],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) compat_ptr(a[4]), a[5]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) case SYS_RECV:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) ret = __compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) case SYS_RECVFROM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) ret = __compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) compat_ptr(a[4]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) compat_ptr(a[5]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) case SYS_SHUTDOWN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) ret = __sys_shutdown(a0, a1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) case SYS_SETSOCKOPT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) ret = __sys_setsockopt(a0, a1, a[2], compat_ptr(a[3]), a[4]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) case SYS_GETSOCKOPT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) ret = __sys_getsockopt(a0, a1, a[2], compat_ptr(a[3]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) compat_ptr(a[4]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) case SYS_SENDMSG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) ret = __compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) case SYS_SENDMMSG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) ret = __compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) case SYS_RECVMSG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) ret = __compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) case SYS_RECVMMSG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) ret = __sys_recvmmsg(a0, compat_ptr(a1), a[2],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) a[3] | MSG_CMSG_COMPAT, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) compat_ptr(a[4]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) case SYS_ACCEPT4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) ret = __sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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