linux-kernel - Re: [PATCH 2/2] perf: fix perf_event_init_task()/perf_event_free

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:	Wed, 19 Jan 2011 19:51:13 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Alan Stern <stern@...land.harvard.edu>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>, Paul Mackerras <paulus@...ba.org>,
	Prasad <prasad@...ux.vnet.ibm.com>,
	Roland McGrath <roland@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] perf: fix
 perf_event_init_task()/perf_event_free_task() interaction

On Wed, 2011-01-19 at 19:22 +0100, Oleg Nesterov wrote:
> perf_event_init_task() should clear child->perf_event_ctxp[] before
> anything else. Otherwise, if perf_event_init_context(perf_hw_context)
> fails, perf_event_free_task() can free perf_event_ctxp[perf_sw_context]
> copied from parent->perf_event_ctxp[] by dup_task_struct().
> 
> Also move the initialization of perf_event_mutex and perf_event_list
> from perf_event_init_context() to perf_event_init_context().
> 
> Signed-off-by: Oleg Nesterov <oleg@...hat.com>

Another fine find.

Acked-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
--
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/