linux-kernel - Re: [ 10/41] CIFS: Do not kmalloc under the flocks spinlock

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Message-ID: <CAKywueQoKN51mea7TkpT3WS=Vgj5ijNn1pOSb3cC=UZ9vVu6dw@mail.gmail.com>
Date:	Sat, 17 Mar 2012 11:52:24 +0400
From:	Pavel Shilovsky <piastry@...rsoft.ru>
To:	Ben Hutchings <ben@...adent.org.uk>
Cc:	Greg KH <gregkh@...uxfoundation.org>, linux-kernel@...r.kernel.org,
	stable@...r.kernel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Jeff Layton <jlayton@...hat.com>,
	Steve French <sfrench@...ibm.com>
Subject: Re: [ 10/41] CIFS: Do not kmalloc under the flocks spinlock

17 марта 2012 г. 11:32 пользователь Ben Hutchings <ben@...adent.org.uk> написал:
> On Sat, 2012-03-17 at 10:14 +0400, Pavel Shilovsky wrote:
>> 17 марта 2012 г. 6:37 пользователь Ben Hutchings <ben@...adent.org.uk> написал:
>> > On Fri, Mar 16, 2012 at 04:38:20PM -0700, Greg KH wrote:
>> >> 3.2-stable review patch.  If anyone has any objections, please let me know.
> [...]
>> > But we test this before flock->fl_flags & FL_POSIX, which means we
>> > don't know whether this lock actually needs to be assigned one of
>> > those structures.  So it appears that we might report a spurious error
>> > if the lock list ends with a mandatory lock.  If so, this is
>> > relatively harmless but does need to be fixed.
>> >
>>
>> You are right here, thanks for the catch! I will repost the patch asap.
>
> This has already been merged into Linus's tree, so you need to submit a
> patch to apply on top of it.
>

I posted two patches:
1) the whole fixed version for the stable tree [PATCH v2] CIFS: Do not
kmalloc under the flocks spinlock
2) fixup for mainline [PATCH] CIFS: Fix a spurious error in
cifs_push_posix_locks

-- 
Best regards,
Pavel Shilovsky.
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