linux-kernel - Re: [stable] [PATCH 1/2] posix-timers: fix RLIMIT

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Message-ID: <20090331030133.GH3264@hera.kernel.org>
Date:	Tue, 31 Mar 2009 03:01:33 +0000
From:	Chris Wright <chrisw@...s-sol.org>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Peter Zijlstra <peterz@...radead.org>,
	Peter Lojkin <ia6432@...ox.ru>, linux-kernel@...r.kernel.org,
	Roland McGrath <roland@...hat.com>, stable@...nel.org
Subject: Re: [stable] [PATCH 1/2] posix-timers: fix RLIMIT_CPU && fork()

* Oleg Nesterov (oleg@...hat.com) wrote:
> See http://bugzilla.kernel.org/show_bug.cgi?id=12911
> 
> copy_signal() copies signal->rlim, but RLIMIT_CPU is "lost". Because
> posix_cpu_timers_init_group() sets cputime_expires.prof_exp = 0 and thus
> fastpath_timer_check() returns false unless we have other expired cpu timers.
> 
> Change copy_signal() to set cputime_expires.prof_exp if we have RLIMIT_CPU.
> Also, set cputimer.running = 1 in that case. This is not strictly necessary,
> but imho makes sense.

For -stable should this be instead of 37bebc70d7ad4144c571d74500db3bb26ec0c0eb?

thanks,
-chris
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