From: Peter Hurley <peter@hurleysoftware.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "Svenning Sørensen" <sss@secomea.dk>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] IPC: bugfix for msgrcv with msgtyp < 0
Date: Mon, 26 Aug 2013 16:59:24 -0400 [thread overview]
Message-ID: <521BC1AC.9090002@hurleysoftware.com> (raw)
In-Reply-To: <20130826134250.66830c1a551f6619544bd6a8@linux-foundation.org>
On 08/26/2013 04:42 PM, Andrew Morton wrote:
> On Sat, 24 Aug 2013 08:49:25 -0400 Peter Hurley <peter@hurleysoftware.com> wrote:
>
>> On 08/24/2013 07:44 AM, Svenning S__rensen wrote:
>>> According to 'man msgrcv':
>>> "If msgtyp is less than 0, the first message of the lowest type that is less
>>> than or equal to the absolute value of msgtyp shall be received."
>>>
>>> Bug: The kernel only returns a message if its type is 1; other messages with
>>> type < abs(msgtype) will never get returned.
>>>
>>> Fix: After having traversed the list to find the first message with the
>>> lowest type, we need to actually return that message.
>>
>> Sorry for the breakage. Needs to go to -stable as well.
>
> Do you know which commit caused the regression? That would help those
> who wish to fix up their kernels.
Commit daaf74cf0867e3042090d56d10b194d6265b4684,
ipc: refactor msg list search into separate function
introduced this regression.
Regards,
Peter Hurley
>> Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
>>
next prev parent reply other threads:[~2013-08-26 20:59 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-24 11:44 [PATCH] IPC: bugfix for msgrcv with msgtyp < 0 Svenning Sørensen
2013-08-24 12:49 ` Peter Hurley
2013-08-26 20:42 ` Andrew Morton
2013-08-26 20:59 ` Peter Hurley [this message]
2013-08-26 20:41 ` Andrew Morton
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