提交 da184284 编写于 作者: A Al Viro

net: switch importing msghdr from userland to {compat_,}import_iovec()

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
上级 602bd0e9
master alk-4.19.24 alk-4.19.30 alk-4.19.34 alk-4.19.36 alk-4.19.43 alk-4.19.48 alk-4.19.57 ck-4.19.67 ck-4.19.81 ck-4.19.91 github/fork/deepanshu1422/fix-typo-in-comment github/fork/haosdent/fix-typo linux-next v4.19.91 v4.19.90 v4.19.89 v4.19.88 v4.19.87 v4.19.86 v4.19.85 v4.19.84 v4.19.83 v4.19.82 v4.19.81 v4.19.80 v4.19.79 v4.19.78 v4.19.77 v4.19.76 v4.19.75 v4.19.74 v4.19.73 v4.19.72 v4.19.71 v4.19.70 v4.19.69 v4.19.68 v4.19.67 v4.19.66 v4.19.65 v4.19.64 v4.19.63 v4.19.62 v4.19.61 v4.19.60 v4.19.59 v4.19.58 v4.19.57 v4.19.56 v4.19.55 v4.19.54 v4.19.53 v4.19.52 v4.19.51 v4.19.50 v4.19.49 v4.19.48 v4.19.47 v4.19.46 v4.19.45 v4.19.44 v4.19.43 v4.19.42 v4.19.41 v4.19.40 v4.19.39 v4.19.38 v4.19.37 v4.19.36 v4.19.35 v4.19.34 v4.19.33 v4.19.32 v4.19.31 v4.19.30 v4.19.29 v4.19.28 v4.19.27 v4.19.26 v4.19.25 v4.19.24 v4.19.23 v4.19.22 v4.19.21 v4.19.20 v4.19.19 v4.19.18 v4.19.17 v4.19.16 v4.19.15 v4.19.14 v4.19.13 v4.19.12 v4.19.11 v4.19.10 v4.19.9 v4.19.8 v4.19.7 v4.19.6 v4.19.5 v4.19.4 v4.19.3 v4.19.2 v4.19.1 v4.19 v4.19-rc8 v4.19-rc7 v4.19-rc6 v4.19-rc5 v4.19-rc4 v4.19-rc3 v4.19-rc2 v4.19-rc1 ck-release-21 ck-release-20 ck-release-19.2 ck-release-19.1 ck-release-19 ck-release-18 ck-release-17.2 ck-release-17.1 ck-release-17 ck-release-16 ck-release-15.1 ck-release-15 ck-release-14 ck-release-13.2 ck-release-13 ck-release-12 ck-release-11 ck-release-10 ck-release-9 ck-release-7 alk-release-15 alk-release-14 alk-release-13.2 alk-release-13 alk-release-12 alk-release-11 alk-release-10 alk-release-9 alk-release-7
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......@@ -40,7 +40,7 @@ int compat_sock_get_timestampns(struct sock *, struct timespec __user *);
#define compat_mmsghdr mmsghdr
#endif /* defined(CONFIG_COMPAT) */
ssize_t get_compat_msghdr(struct msghdr *, struct compat_msghdr __user *,
int get_compat_msghdr(struct msghdr *, struct compat_msghdr __user *,
struct sockaddr __user **, struct iovec **);
asmlinkage long compat_sys_sendmsg(int, struct compat_msghdr __user *,
unsigned int);
......
......@@ -31,10 +31,10 @@
#include <asm/uaccess.h>
#include <net/compat.h>
ssize_t get_compat_msghdr(struct msghdr *kmsg,
struct compat_msghdr __user *umsg,
struct sockaddr __user **save_addr,
struct iovec **iov)
int get_compat_msghdr(struct msghdr *kmsg,
struct compat_msghdr __user *umsg,
struct sockaddr __user **save_addr,
struct iovec **iov)
{
compat_uptr_t uaddr, uiov, tmp3;
compat_size_t nr_segs;
......@@ -81,13 +81,9 @@ ssize_t get_compat_msghdr(struct msghdr *kmsg,
kmsg->msg_iocb = NULL;
err = compat_rw_copy_check_uvector(save_addr ? READ : WRITE,
compat_ptr(uiov), nr_segs,
UIO_FASTIOV, *iov, iov);
if (err >= 0)
iov_iter_init(&kmsg->msg_iter, save_addr ? READ : WRITE,
*iov, nr_segs, err);
return err;
return compat_import_iovec(save_addr ? READ : WRITE,
compat_ptr(uiov), nr_segs,
UIO_FASTIOV, iov, &kmsg->msg_iter);
}
/* Bleech... */
......
......@@ -1841,10 +1841,10 @@ struct used_address {
unsigned int name_len;
};
static ssize_t copy_msghdr_from_user(struct msghdr *kmsg,
struct user_msghdr __user *umsg,
struct sockaddr __user **save_addr,
struct iovec **iov)
static int copy_msghdr_from_user(struct msghdr *kmsg,
struct user_msghdr __user *umsg,
struct sockaddr __user **save_addr,
struct iovec **iov)
{
struct sockaddr __user *uaddr;
struct iovec __user *uiov;
......@@ -1890,13 +1890,8 @@ static ssize_t copy_msghdr_from_user(struct msghdr *kmsg,
kmsg->msg_iocb = NULL;
err = rw_copy_check_uvector(save_addr ? READ : WRITE,
uiov, nr_segs,
UIO_FASTIOV, *iov, iov);
if (err >= 0)
iov_iter_init(&kmsg->msg_iter, save_addr ? READ : WRITE,
*iov, nr_segs, err);
return err;
return import_iovec(save_addr ? READ : WRITE, uiov, nr_segs,
UIO_FASTIOV, iov, &kmsg->msg_iter);
}
static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg,
......@@ -1921,8 +1916,8 @@ static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg,
else
err = copy_msghdr_from_user(msg_sys, msg, NULL, &iov);
if (err < 0)
goto out_freeiov;
total_len = err;
return err;
total_len = iov_iter_count(&msg_sys->msg_iter);
err = -ENOBUFS;
......@@ -1988,8 +1983,7 @@ static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg,
if (ctl_buf != ctl)
sock_kfree_s(sock->sk, ctl_buf, ctl_len);
out_freeiov:
if (iov != iovstack)
kfree(iov);
kfree(iov);
return err;
}
......@@ -2114,8 +2108,8 @@ static int ___sys_recvmsg(struct socket *sock, struct user_msghdr __user *msg,
else
err = copy_msghdr_from_user(msg_sys, msg, &uaddr, &iov);
if (err < 0)
goto out_freeiov;
total_len = err;
return err;
total_len = iov_iter_count(&msg_sys->msg_iter);
cmsg_ptr = (unsigned long)msg_sys->msg_control;
msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT);
......@@ -2153,8 +2147,7 @@ static int ___sys_recvmsg(struct socket *sock, struct user_msghdr __user *msg,
err = len;
out_freeiov:
if (iov != iovstack)
kfree(iov);
kfree(iov);
return err;
}
......
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