linux-kernel - Re: regression since 4.8 and newer in select_idle

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

Date:   Tue, 18 Oct 2016 16:02:07 +0200
From:   Mike Galbraith <efault@....de>
To:     Igor Mammedov <imammedo@...hat.com>, linux-kernel@...r.kernel.org
Cc:     mingo@...hat.com, peterz@...radead.org, tglx@...utronix.de,
        torvalds@...ux-foundation.org
Subject: Re: regression since 4.8 and newer in select_idle_siblings()

On Tue, 2016-10-18 at 15:40 +0200, Igor Mammedov wrote:
> kernel crashes at runtime  due null pointer dereference at
>   select_idle_sibling()
>      -> select_idle_cpu()
>          ...
>          u64 avg_cost = this_sd->avg_scan_cost;
> 
> regression bisects to:
>   commit 10e2f1acd0106c05229f94c70a344ce3a2c8008b
>   Author: Peter Zijlstra <peterz@...radead.org>
>   sched/core: Rewrite and improve select_idle_siblings()

http://git.kernel.org/tip/9cfb38a7ba5a9c27c1af8093fb1af4b699c0a441

Already fixed, and will land in Linus' tree soon.

	-Mike