Re: [PATCH] io_uring/memmap: return PTR_ERR() from get_unmapped_area()

[Gabriel Krisman Bertazi <krisman@suse.de>]

Yi Xie <xieyi@kylinos.cn> writes:

> Use PTR_ERR() on validate failure, like io_uring_mmap().

FWIW, this is not about using PTR_ERR, but about changing the return on
error to -EINVAL, which is what is returned by
io_uring_validate_mmap_request.  The commit message should reflect that,
specially because this is returned to userspace eventually, and might
break some application checks..


> Signed-off-by: Yi Xie <xieyi@kylinos.cn>
> ---
>  io_uring/memmap.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/io_uring/memmap.c b/io_uring/memmap.c
> index da1f6c5d07f8..23e8a85111bc 100644
> --- a/io_uring/memmap.c
> +++ b/io_uring/memmap.c
> @@ -337,7 +337,7 @@ unsigned long io_uring_get_unmapped_area(struct file *filp, unsigned long addr,
>  
>  	ptr = io_uring_validate_mmap_request(filp, pgoff);
>  	if (IS_ERR(ptr))
> -		return -ENOMEM;
> +		return PTR_ERR(ptr);
>  
>  	/*
>  	 * Some architectures have strong cache aliasing requirements.
> -- 
> 2.25.1
>

-- 
Gabriel Krisman Bertazi