linux-kernel - Re: [PATCH] IPC: bugfix for msgrcv with msgtyp

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Message-ID: <5218ABD5.1000400@hurleysoftware.com>
Date:	Sat, 24 Aug 2013 08:49:25 -0400
From:	Peter Hurley <peter@...leysoftware.com>
To:	Svenning Sørensen <sss@...omea.dk>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] IPC: bugfix for msgrcv with msgtyp < 0

On 08/24/2013 07:44 AM, Svenning Sørensen 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.

Reviewed-by: Peter Hurley <peter@...leysoftware.com>


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