From owner-freebsd-bugs@freebsd.org Tue Nov 12 20:12:12 2019 Return-Path: Delivered-To: freebsd-bugs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 1813E1B996E for ; Tue, 12 Nov 2019 20:12:12 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (unknown [127.0.1.3]) by mx1.freebsd.org (Postfix) with ESMTP id 47CJn76wq7z43T2 for ; Tue, 12 Nov 2019 20:12:11 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id ED9DE1B996D; Tue, 12 Nov 2019 20:12:11 +0000 (UTC) Delivered-To: bugs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id ED5B61B996C for ; Tue, 12 Nov 2019 20:12:11 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 47CJn764qtz43T0 for ; Tue, 12 Nov 2019 20:12:11 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id B4D7151A9 for ; Tue, 12 Nov 2019 20:12:11 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id xACKCBat024891 for ; Tue, 12 Nov 2019 20:12:11 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id xACKCBPn024890 for bugs@FreeBSD.org; Tue, 12 Nov 2019 20:12:11 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: bugs@FreeBSD.org Subject: [Bug 241927] kernel crash in kern_cpuset_setdomain(CPU_LEVEL_CPUSET, CPU_WHICH_PID, -1, ...) Date: Tue, 12 Nov 2019 20:12:11 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 12.0-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: bgoglin@free.fr X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter attachments.created Message-ID: 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: 2.1.29 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 Nov 2019 20:12:12 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D241927 Bug ID: 241927 Summary: kernel crash in kern_cpuset_setdomain(CPU_LEVEL_CPUSET, CPU_WHICH_PID, -1, ...) Product: Base System Version: 12.0-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: bgoglin@free.fr Created attachment 209111 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D209111&action= =3Dedit screenshot of the backtrace of the crash Hello While adding FreeBSD NUMA support in hwloc, we found a reproducible way to crash the kernel. Just call cpuset_setdomain(CPU_LEVEL_CPUSET, CPU_WHICH_PI= D, -1, ...). Here's the minimalistic userland program to reproduce: #include #include #include #include #include int main() { domainset_t mask; DOMAINSET_ZERO(&mask); DOMAINSET_SET(0, &mask); cpuset_setdomain(CPU_LEVEL_CPUSET, CPU_WHICH_PID, -1, sizeof(mask), &mask, DOMAINSET_POLICY_PREFER); } I don't understand what this call is supposed to do, we actually wanted to = use CPU_LEVEL_WHICH instead of CPU_LEVEL_CPUSET :) We were running this inside a KVM VM with 4 NUMA domains but the crash also occurs without multiple NUMA domains. I am attaching a screenshot of the backtrace after the crash. I don't know = how to debug more. Brice --=20 You are receiving this mail because: You are the assignee for the bug.=