Bug#864453: fanotify07 LTP testcase hangs process

[Salvatore Bonaccorso <carnil@debian.org>]

Hi,

On Thu, Jun 08, 2017 at 09:23:33PM +0200, Helge Deller wrote:
> Package: linux
> Version: 4.9.30
> 
> The LTP testcase fanotify07 creates hanging processes
> with debian kernel 4.9.30 on the hppa platform.
> 
> In the source code of LTP's fanotify07.c testcase one can read:
>  * Kernel crashes should be fixed by:
>  *  96d41019e3ac "fanotify: fix list corruption in fanotify_get_response()"
>  *
>  * Kernel hangs should be fixed by:
>  *  05f0e38724e8 "fanotify: Release SRCU lock when waiting for userspace response"
> 
> It seems upstream commit 
> 05f0e38724e8 "fanotify: Release SRCU lock when waiting for userspace response"
> is missing in stable kernel 4.9.30 (and debian kernel), which explains why the
> testcase hangs.
> I didn't checked if the kernel crash fix is in 4.9.30.
> 
> Can you backport at least the commit 05f0e38724e8 ?

That looks has happened for the 4.9 stable series as in
https://lore.kernel.org/stable/20190411032430.17353-1-matthew.ruffell@canonical.com/
and would be included afaics in 4.9.169.

Regards,
Salvatore