linux-kernel - Re: Regression in posix-cpu-timers.c (was Re: Linux 5.14.4)

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Message-ID: <YUI26QI7dfgjUioT@kroah.com>
Date:   Wed, 15 Sep 2021 20:09:45 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     "Alan J. Wylie" <alan@...ie.me.uk>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Frederic Weisbecker <frederic@...nel.org>,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: Regression in posix-cpu-timers.c (was Re: Linux 5.14.4)

On Wed, Sep 15, 2021 at 06:45:33PM +0100, Alan J. Wylie wrote:
> 
> Greg Kroah-Hartman <gregkh@...uxfoundation.org> writes:
> 
> > I'm announcing the release of the 5.14.4 kernel.
> 
> I'm seeing a regression in 5.14.4
> 
> Running Nextcloud (a PHP web application) with a PostgreSQL backend
> 
> All was fine with 5.14.3
> 
> With 5.14.4, Nextcloud hangs loading events/contacts, etc.
> 
> As well as the web interface hanging, running this command on the command
> line also errors:
> 
> # su apache -s /bin/bash -c "cd /var/www/htdocs/nextcloud/ && php occ maintenance:mode --on"
> PHP Fatal error:  Maximum execution time of 0 seconds exceeded in
> /var/www/htdocs/nextcloud/lib/private/Files/AppData/AppData.php on line 41
> 
> # su apache -s /bin/bash -c "cd /var/www/htdocs/nextcloud/ && php occ maintenance:mode --on"
> PHP Fatal error:  Maximum execution time of 0 seconds exceeded in
> /var/www/htdocs/nextcloud/3rdparty/symfony/console/Application.php on line 65
> 
> # su apache -s /bin/bash -c "cd /var/www/htdocs/nextcloud/ && php occ maintenance:mode --on"
> PHP Fatal error:  Maximum execution time of 0 seconds exceeded in
> /var/www/htdocs/nextcloud/lib/public/Files/SimpleFS/ISimpleRoot.php on line 68
> 
> # su apache -s /bin/bash -c "cd /var/www/htdocs/nextcloud/ && php occ maintenance:mode --on"
> PHP Fatal error:  Maximum execution time of 0 seconds exceeded in
> /var/www/htdocs/nextcloud/apps/theming/lib/ImageManager.php on line 313
> 
> Note that the above commands were all run immediately after each other,
> but showed up in different php scripts.
> 
> Similar errors appear in the Apache log.
> 
> After reverting this commit in 5.14.4, Nextcloud resumed working.
> 
> $ git revert 564005805aadec9cb7e5dc4e14071b8f87cd6b58
> 
> This commit is 406dd42bd1ba0c01babf9cde169bb319e52f6147 in Linus's tree

Thanks for bisecting this down.

Does 5.15-rc1 also fail in this same way, or does it work ok?

thanks,

greg k-h