Re: [LKP] Re: [pipe] d60337eff1: BUG:kernel_NULL_pointer_dereference,address

[kernel test robot]

Hi David,

Yes, it can fix the problem.

Best Regards,
Rong Chen

On 11/16/2019 12:22 AM, David Howells wrote:
> Actually, no, this is the fix:
>
> diff --git a/lib/iov_iter.c b/lib/iov_iter.c
> index 7006b5b2106d..be2fc5793ddd 100644
> --- a/lib/iov_iter.c
> +++ b/lib/iov_iter.c
> @@ -537,7 +537,7 @@ static size_t push_pipe(struct iov_iter *i, size_t size,
>   		buf->ops = &default_pipe_buf_ops;
>   		buf->page = page;
>   		buf->offset = 0;
> -		buf->len = max_t(ssize_t, left, PAGE_SIZE);
> +		buf->len = min_t(ssize_t, left, PAGE_SIZE);
>   		left -= buf->len;
>   		iter_head++;
>   		pipe->head = iter_head;
>
> David
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