From owner-freebsd-bugs@freebsd.org Thu Feb 7 18:24:34 2019 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 C236314B6182 for ; Thu, 7 Feb 2019 18:24:34 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 5A8DD6D394 for ; Thu, 7 Feb 2019 18:24:34 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id 1AF0214B6181; Thu, 7 Feb 2019 18:24:34 +0000 (UTC) Delivered-To: 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 D04DB14B6180 for ; Thu, 7 Feb 2019 18:24:33 +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 TLSv1.3 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.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 613E46D390 for ; Thu, 7 Feb 2019 18:24:33 +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 77F07CFC6 for ; Thu, 7 Feb 2019 18:24:32 +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 x17IOWIL020289 for ; Thu, 7 Feb 2019 18:24:32 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id x17IOW5f020288 for bugs@FreeBSD.org; Thu, 7 Feb 2019 18:24:32 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 235582] rpc_svc_gss / nfsd kernel panic Date: Thu, 07 Feb 2019 18:24:31 +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: 11.2-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: peter.x.eriksson@liu.se 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 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: Thu, 07 Feb 2019 18:24:35 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D235582 Bug ID: 235582 Summary: rpc_svc_gss / nfsd kernel panic Product: Base System Version: 11.2-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: peter.x.eriksson@liu.se We have recently gone "live" with more NFS users "banging" on our FreeBSD-b= ased fileservers. And now something seems to have started triggering kernel pani= cs. Since the they major difference from before is the number of NFS users so t= his is the major suspect... We just caught a panic and got a screendump from the console and the stack traceback shows: > Fatal trap 12: page fault while in kernel mode > cpuid =3D 8; apic id =3D 08 > fault virtual addresa =3D 0x0 > fault code =3D supervisor read data, page not present > instruction pointer =3D 0x20:0xffffffff82b578e9 > stack pointer =3D 0x20:0xfffffe3fdc627760 > code segment =3D base 0x0, limit 0xfffff, type 0x1b =3D DPL 0, pres 1, long 1, def32 0, gran 1 > processor eflags =3D interrupt enabled, resume, IOPL =3D 0 > current process =3D 2519 (nfsd: service) > trap number =3D 12 > panic: page fault > cpuid =3D 8 > KDB: stack backtrace > #0 0xffffffff80b3d577 at kdb_backtrace+0x67 > #1 0xffffffff80af6b17 at vpanic+0x177 > #2 0xffffffff80af6993 at panic+0x43 > #3 0xffffffff80f77fdf at trap_fatal+0x35f > #4 0xffffffff80f78039 at trap_pfault+0x49 > #5 0xffffffff80f77807 at trap+0x2c7 > #6 0xffffffff80f56fbc at calltrap+0x8 > #7 0xffffffff82b5d4d2 at svc_rpc_gss+0x8f2 > # 8 0xffffffff80d6c1b6 at svc_run_internal+0x726 > #9 0xffffffff80d6cd4b at svc_thread_start+0xb > #10 0xffffffff80aba093 at fork_exit+0x8 > #11 0xffffffff80f48ede at fork_trampoline+0xe (Unfortunately not kernel crash dump from this machine). Systems are: Dell PowerEdge R730xd with 256GB RAM, HBA330 (LSI 3008) SAS controllers, ZFS-storage, Intel X710 10GE-ethernet machines running FreeBSD 11.2. No swap enabled. ZFS ARC capped to 128GB. NFS v4.0 or v4.1 client with sec=3Dkrb5:krb5i:krb5p security. Most clients = (if not all) are running Linux CentOS or Ubuntu). Around 200 active clients per server. (Most clients are Windows users using SMB via Samba though) We have enabled a crash dump device one a couple of the machines and are go= ing to enable it on more in order to try to get a crash-dump when the next serv= er panics... Any ideas where this bug might be or how we could workaround it? (Disabling= NFS is unfortunately not an option). --=20 You are receiving this mail because: You are the assignee for the bug.=