From owner-cvs-all Tue Aug 13 1:47:25 2002 Delivered-To: cvs-all@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id AF70437B400; Tue, 13 Aug 2002 01:47:20 -0700 (PDT) Received: from freefall.freebsd.org (freefall.FreeBSD.org [216.136.204.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5F33343E4A; Tue, 13 Aug 2002 01:47:20 -0700 (PDT) (envelope-from alfred@FreeBSD.org) Received: from freefall.freebsd.org (alfred@localhost [127.0.0.1]) by freefall.freebsd.org (8.12.4/8.12.4) with ESMTP id g7D8lKJU036127; Tue, 13 Aug 2002 01:47:20 -0700 (PDT) (envelope-from alfred@freefall.freebsd.org) Received: (from alfred@localhost) by freefall.freebsd.org (8.12.4/8.12.4/Submit) id g7D8lKKQ036126; Tue, 13 Aug 2002 01:47:20 -0700 (PDT) Message-Id: <200208130847.g7D8lKKQ036126@freefall.freebsd.org> From: Alfred Perlstein Date: Tue, 13 Aug 2002 01:47:19 -0700 (PDT) To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern sysv_sem.c X-FreeBSD-CVS-Branch: HEAD Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG alfred 2002/08/13 01:47:17 PDT Modified files: sys/kern sysv_sem.c Log: Make SYSVSEM mpsafe. Each semaphore set gets its own lock, however there is a global lock over the undo structures because of the way they are managed. Switch to using SLIST instead of rolling our own linked list. Fix several races where a permission check was done before a copyin/copyout, if the copy happened to fault it may have been possible to race for access to a semaphore set that one shouldn't have access to. Requested by: rwatson Tested by: NetBSD regression suite. Revision Changes Path 1.55 +172 -87 src/sys/kern/sysv_sem.c To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message