Re: [PATCH 07/12] vfs: do get_write_access() on upper layer of overlayfs

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On Wed, Oct 19, 2016 at 9:41 AM, Amir Goldstein <amir73il@xxxxxxxxx> wrote:

> But I noticed a strange behavior:
> When you run t_truncate_self from upper you get success for not being
> able to truncate.
> When you run t_truncate_self from lower you get an error for being
> able to truncate
> This is ok as you write, but...
> When you re-run t_truncate_self file that just got copied-up you get
> segmentation fault
> and that is not ok.
>
> You get try the patch to xfstest below to reproduce the problem:

Why would a program want to self truncate itself, except to test denywrite?

Thanks,
Miklos
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