From owner-freebsd-bugs@freebsd.org Thu Mar 29 14:35:04 2018 Return-Path: Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 1321DF4F9AE for ; Thu, 29 Mar 2018 14:35:04 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 9E88F7146D for ; Thu, 29 Mar 2018 14:35:03 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id CB6FD23F73 for ; Thu, 29 Mar 2018 14:35:02 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id w2TEZ2I9062446 for ; Thu, 29 Mar 2018 14:35:02 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id w2TEZ2K9062444 for freebsd-bugs@FreeBSD.org; Thu, 29 Mar 2018 14:35:02 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 227041] Kernel cannot fork new process after calling pmc_deatch with pid 0 Date: Thu, 29 Mar 2018 14:35:03 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 11.1-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: dom@itsallbroken.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 29 Mar 2018 14:35:04 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D227041 --- Comment #3 from Dom --- Hi Conrad, thanks for the quick reply. I can't see any LORs when reproducing this issue and I can't seem to dtrace= my way to a culprit either. If pmc_release() is called the system livelocks immediately every time, how= ever if it's left out the first run of pmc-crash does not crash, and the second = run will either force an immediate reboot (again with nothing in the console) or run successfully, but attempting to unload hwpmc livelocks. If pmc-crash successfully exits subsequent runs pmc_allocate() returns EINVAL. At least one pmc_read() must be performed for either of these livelocks to occur. After either, pressing the power button starts to cleanly power off = but deadlocks after geli detaches my encrypted swap. I've also discovered two almost definitely unrelated LORs: - https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D227065 - https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D196799 --=20 You are receiving this mail because: You are the assignee for the bug.=