linux-kernel - Re: [regression] Re: [PATCH 2/3] futex: Sanitize cmpxchg_futex_value

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Message-ID: <CAA9xbM5vEyw6wSghJPLdaY3_gfme1scfdYYDe92Rmdg+NitBww@mail.gmail.com>
Date:	Sun, 15 Apr 2012 23:35:21 +0200
From:	Émeric Maschino <emeric.maschino@...il.com>
To:	Jonathan Nieder <jrnieder@...il.com>
Cc:	"Luck, Tony" <tony.luck@...el.com>,
	"linux-ia64@...r.kernel.org" <linux-ia64@...r.kernel.org>,
	Michel Lespinasse <walken@...gle.com>,
	Patrick Baggett <baggett.patrick@...il.com>,
	Jakub Jelinek <jakub@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [regression] Re: [PATCH 2/3] futex: Sanitize cmpxchg_futex_value_locked
 API

Hi,

Patch proposed by Tony in
https://bugzilla.kernel.org/show_bug.cgi?id=42757 works for me :-)

Many thanks,

    Emeric



Le 8 mars 2012 22:12, Émeric Maschino <emeric.maschino@...il.com> a écrit :
> Oops, just to correct myself: the tests described below DON'T return
> gracefully with kernel 3.2. Sorry for the mistake.
>
>     Emeric
>
>
> Le 8 mars 2012 21:59, Émeric Maschino <emeric.maschino@...il.com> a écrit :
>> ERROR: No such process: FUTEX_CMP_REQUEUE_PI failed
>>
>> For memories, this test passed successfully with 2.6.38-rc8+, with AND
>> without 37a9d912b24f included.
>>
>> Now, adding locked argument, I'm getting:
>>
>> ERROR: Function not implemented: FUTEX_REQUEUE_PI failed
>>
>> Huh? Both these tests nevertheless gracefully return with kernel 3.2,
>> while the second test enters in an unfinite loop with buggy
>> 2.6.38-rc8+.
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