linux-kernel - Re: [PATCH] staging: bcm2835-camera: Avoid apotential sleep while holding a spin

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Mon, 24 Jun 2019 10:13:48 +0200
From:   Stefan Wahren <stefan.wahren@...e.com>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        eric@...olt.net, gregkh@...uxfoundation.org, f.fainelli@...il.com,
        rjui@...adcom.com, sbranden@...adcom.com,
        bcm-kernel-feedback-list@...adcom.com, tuomas.tynkkynen@....fi,
        inf.braun@....de, tobias.buettner@....de, hofrat@...dl.org
Cc:     linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Dave Stevenson <dave.stevenson@...pberrypi.org>
Subject: Re: [PATCH] staging: bcm2835-camera: Avoid apotential sleep while
 holding a spin_lock

Hi Christophe,

Am 24.06.2019 um 07:33 schrieb Christophe JAILLET:
> Do not allocate memory with GFP_KERNEL when holding a spin_lock, it may
> sleep. Use GFP_NOWAIT instead.
>
> Fixes: 950fd867c635 ("staging: bcm2835-camera: Replace open-coded idr with a struct idr.")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>

there has been a fix for this, which isn't upstreamed yet. The preferred 
solution is to replace the spin_lock with a mutex. Since i'm currently 
working on this i would take care of this.

Sorry about this.

Stefan