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

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On Wed, Oct 19, 2016 at 11:12 AM, Miklos Szeredi <miklos@xxxxxxxxxx> wrote:
> 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?
>


Forget it. my re-run test was silly. Because the truncate succeeded
it was trying to run a corrupted executable.

I will send patches to fix the test according to new behavior.

Thanks,
Amir.
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