From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755126AbdEUAdf (ORCPT ); Sat, 20 May 2017 20:33:35 -0400 Received: from outbound.smtp.vt.edu ([198.82.183.121]:44026 "EHLO omr2.cc.vt.edu" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751457AbdEUAde (ORCPT ); Sat, 20 May 2017 20:33:34 -0400 X-Greylist: delayed 15276 seconds by postgrey-1.27 at vger.kernel.org; Sat, 20 May 2017 20:33:34 EDT X-Mailer: exmh version 2.8.0 04/21/2017 with nmh-1.6+dev From: valdis.kletnieks@vt.edu To: Manfred Spraul , Kees Cook Cc: linux-kernel@vger.kernel.org, Andrew Morton Subject: linux-next 20170519 - semaphores broken Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1495311530_2787P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Sat, 20 May 2017 16:18:50 -0400 Message-ID: <3130.1495311530@turing-police.cc.vt.edu> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --==_Exmh_1495311530_2787P Content-Type: text/plain; charset=us-ascii Seeing problems with programs that use semaphores. The one that I'm getting bit by is jackd. strace says: getuid() = 967 semget(0x282929, 0, 000) = 229376 semop(229376, [{0, -1, SEM_UNDO}], 1) = -1 EIDRM (Identifier removed) write(2, "JACK semaphore error: semop (Ide"..., 49JACK semaphore error: semop (Identifier removed) ) = 49 Bisects down to this commit, and reverting it from 20170519 makes things work again. No idea why this causes indigestion, there's probably something subtly wrong here.... commit 337f43326737b5eb28eb13f43c27a5788da0f913 Author: Manfred Spraul Date: Fri May 19 07:39:23 2017 +1000 ipc: merge ipc_rcu and kern_ipc_perm ipc has two management structures that exist for every id: - struct kern_ipc_perm, it contains e.g. the permissions. - struct ipc_rcu, it contains the rcu head for rcu handling and the refcount. --==_Exmh_1495311530_2787P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Comment: Exmh version 2.8.0 04/21/2017 iQEVAwUBWSCkqo0DS38y7CIcAQKVvQf+KYnMfkIld0NM2STsFqzh8a1TNeuC5Ogg mJCi69gKN2Oth2jKcamIQ0qLXe8B1Bj32983BNia4xJKZ3j1NDGbrsEYMF8CmHeU dAUcF4a824ptOteqjDLZwXHkx48Ui93XjYZe2tuMWnfIo3cmLOnMGgNdrDIrbUA2 2n6oulndLLefJyGJU6lme7XozSKGJ9cY9sJJUUMkJlA6BykgqXR1+e6CofGQqQHk g+foiOJQ+4TqT5y0HjRrAQq9vQ9+2egHP1ro12C8SrZO+m3wN0mXCWOtEKlCaWaJ eFlgh0VMIvMocg+iDO9M6pNsfOkMYoQAxWgB61y7G366qPa+GVpOHg== =Uhcz -----END PGP SIGNATURE----- --==_Exmh_1495311530_2787P--