Re: Null-ptr-deref due to "sanitized pathwalk machinery (v4)"

[Al Viro]

On Wed, Mar 25, 2020 at 03:43:06PM -0400, Qian Cai wrote:

> Since that one has a compilation warning, I have tested this patch and seen no crash so far.
> 
> diff --git a/fs/namei.c b/fs/namei.c
> index 311e33dbac63..73851acdbf3a 100644
> --- a/fs/namei.c
> +++ b/fs/namei.c
> @@ -1806,6 +1806,9 @@ static const char *handle_dots(struct nameidata *nd, int type)
>                                          parent, inode, seq);
>                 }
>  
> +               if (unlikely(error))
> +                       return error;
> +

OK, an equivalent of that had been folded into #work.dotdot/#for-next
I'll definitely throw a mentioning of your reporting that thing;
do you want tested-by: added there as well?