Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752758Ab3HZU7h (ORCPT ); Mon, 26 Aug 2013 16:59:37 -0400 Received: from mailout39.mail01.mtsvc.net ([216.70.64.83]:36141 "EHLO n12.mail01.mtsvc.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752576Ab3HZU7g (ORCPT ); Mon, 26 Aug 2013 16:59:36 -0400 Message-ID: <521BC1AC.9090002@hurleysoftware.com> Date: Mon, 26 Aug 2013 16:59:24 -0400 From: Peter Hurley User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130803 Thunderbird/17.0.8 MIME-Version: 1.0 To: Andrew Morton CC: =?UTF-8?B?U3Zlbm5pbmcgU8O4cmVuc2Vu?= , linux-kernel@vger.kernel.org Subject: Re: [PATCH] IPC: bugfix for msgrcv with msgtyp < 0 References: <52189CB1.9030806@secomea.dk> <5218ABD5.1000400@hurleysoftware.com> <20130826134250.66830c1a551f6619544bd6a8@linux-foundation.org> In-Reply-To: <20130826134250.66830c1a551f6619544bd6a8@linux-foundation.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Authenticated-User: 990527 peter@hurleysoftware.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1271 Lines: 34 On 08/26/2013 04:42 PM, Andrew Morton wrote: > On Sat, 24 Aug 2013 08:49:25 -0400 Peter Hurley 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 >> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/