linux-kernel - Re: [PATCH 3/5] sched/deadline: Fix wrong cpudl_find() in check_preempt_equal

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:	Tue, 27 Jan 2015 17:47:16 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Xunlei Pang <pang.xunlei@...aro.org>
Cc:	linux-kernel@...r.kernel.org, Juri Lelli <juri.lelli@...il.com>
Subject: Re: [PATCH 3/5] sched/deadline: Fix wrong cpudl_find() in
 check_preempt_equal_dl()

On Mon, Jan 19, 2015 at 04:49:38AM +0000, Xunlei Pang wrote:
> In check_preempt_equal_dl(), cpudl_find() is called with a NULL
> later_mask, thus cpudl_find() here doesn't check cpudl::free_cpus
> at all.
> 
> This patch takles this issue by always passing a non-NULL later_mask
> to cpudl_find(), thereby fixing this issue.

Fix what issue? Afaict this is an optimization not a fix.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/