linux-kernel - Re: [PATCH 1/1] async: initialise list heads to fix crash

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Date:	Fri, 25 Jan 2013 09:17:48 -0800
From:	Tejun Heo <tj@...nel.org>
To:	James Hogan <james.hogan@...tec.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Dan Williams <djbw@...com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] async: initialise list heads to fix crash

On Fri, Jan 25, 2013 at 10:13:59AM +0000, James Hogan wrote:
> The commit "async: replace list of active domains with global list of
> pending items" added a struct list_head global_list in struct
> async_entry, which isn't initialised. This means that if
> !domain->registered at __async_schedule(), then list_del_init() will be
> called on the list head in async_run_entry_fn with both pointers NULL,
> causing a crash. This is fixed by initialising both the global_list and
> domain_list list_heads after kzalloc'ing the entry.
> 
> This was noticed due to dapm_power_widgets() which uses
> ASYNC_DOMAIN_EXCLUSIVE, which initialises the domain->registered to 0.
> 
> Signed-off-by: James Hogan <james.hogan@...tec.com>

Applied wq/for-3.9-async.

Thanks!

-- 
tejun
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