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Diffstat (limited to 'fs/read_write.c')
-rw-r--r--fs/read_write.c13
1 files changed, 5 insertions, 8 deletions
diff --git a/fs/read_write.c b/fs/read_write.c
index 58f30537c47a..ff3c5e6f87cf 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -442,7 +442,7 @@ ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos)
return -EBADF;
if (!(file->f_mode & FMODE_CAN_READ))
return -EINVAL;
- if (unlikely(!access_ok(VERIFY_WRITE, buf, count)))
+ if (unlikely(!access_ok(buf, count)))
return -EFAULT;
ret = rw_verify_area(READ, file, pos, count);
@@ -538,7 +538,7 @@ ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_
return -EBADF;
if (!(file->f_mode & FMODE_CAN_WRITE))
return -EINVAL;
- if (unlikely(!access_ok(VERIFY_READ, buf, count)))
+ if (unlikely(!access_ok(buf, count)))
return -EFAULT;
ret = rw_verify_area(WRITE, file, pos, count);
@@ -718,9 +718,6 @@ static ssize_t do_loop_readv_writev(struct file *filp, struct iov_iter *iter,
return ret;
}
-/* A write operation does a read from user space and vice versa */
-#define vrfy_dir(type) ((type) == READ ? VERIFY_WRITE : VERIFY_READ)
-
/**
* rw_copy_check_uvector() - Copy an array of &struct iovec from userspace
* into the kernel and check that it is valid.
@@ -810,7 +807,7 @@ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
goto out;
}
if (type >= 0
- && unlikely(!access_ok(vrfy_dir(type), buf, len))) {
+ && unlikely(!access_ok(buf, len))) {
ret = -EFAULT;
goto out;
}
@@ -856,7 +853,7 @@ ssize_t compat_rw_copy_check_uvector(int type,
*ret_pointer = iov;
ret = -EFAULT;
- if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
+ if (!access_ok(uvector, nr_segs*sizeof(*uvector)))
goto out;
/*
@@ -881,7 +878,7 @@ ssize_t compat_rw_copy_check_uvector(int type,
if (len < 0) /* size_t not fitting in compat_ssize_t .. */
goto out;
if (type >= 0 &&
- !access_ok(vrfy_dir(type), compat_ptr(buf), len)) {
+ !access_ok(compat_ptr(buf), len)) {
ret = -EFAULT;
goto out;
}