linux-kernel - Re: [PATCH v2 7/7] x86: signal: sys_rt_sigreturn() should use set_current

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Message-ID: <20110422151418.3639a131@mfleming-mobl1.ger.corp.intel.com>
Date:	Fri, 22 Apr 2011 15:14:18 +0100
From:	Matt Fleming <matt@...sole-pimps.org>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Tejun Heo <tj@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Nikita V. Youshchenko" <nyoushchenko@...sta.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 7/7] x86: signal: sys_rt_sigreturn() should use
 set_current_blocked()

On Mon, 18 Apr 2011 15:46:41 +0200
Oleg Nesterov <oleg@...hat.com> wrote:

> Normally sys_rt_sigreturn() restores the old current->blocked which was
> changed by handle_signal(), and unblocking is always fine.
> 
> But the debugger or application itself can change frame->uc_sigmask and
> thus we need set_current_blocked()->retarget_shared_pending().
> 
> Signed-off-by: Oleg Nesterov <oleg@...hat.com>

Reviewed-by: Matt Fleming <matt.fleming@...ux.intel.com>

But does sys_sigreturn() also need this change?
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