# Re: Buggy commit tracked to: "Re: \[PATCH 2/9\] iov\_iter: move rw\_copy\_check\_uvector() into lib/iov\_iter.c"

- From: Matthew Wilcox \<willy@infradead.org\>
- Date: 2020-10-22 16:40:59 
- List: netdev
- Page: https://ratatoskr.run/netdev/2020/10/191033
- Thread: https://ratatoskr.run/linux-arm-kernel/2020/09/189618/t.md

```text
On Thu, Oct 22, 2020 at 04:35:17PM +0000, David Laight wrote:
> Wait...
> readv(2) defines:
> 	ssize_t readv(int fd, const struct iovec *iov, int iovcnt);

It doesn't really matter what the manpage says.  What does the AOSP
libc header say?

> But the syscall is defined as:
> 
> SYSCALL_DEFINE3(readv, unsigned long, fd, const struct iovec __user *, vec,
>                 unsigned long, vlen)
> {
>         return do_readv(fd, vec, vlen, 0);
> }

```