From owner-freebsd-bugs@freebsd.org Fri Oct 4 16:10:58 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 5B6561321A2 for ; Fri, 4 Oct 2019 16:10:58 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (mailman.nyi.freebsd.org [IPv6:2610:1c1:1:606c::50:13]) by mx1.freebsd.org (Postfix) with ESMTP id 46lFGp1rJZz4WgN for ; Fri, 4 Oct 2019 16:10:58 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 3EFA01321A1; Fri, 4 Oct 2019 16:10:58 +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 3EC1A1321A0 for ; Fri, 4 Oct 2019 16:10:58 +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 46lFGp0zQ5z4WgL for ; Fri, 4 Oct 2019 16:10:58 +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 E198626BF1 for ; Fri, 4 Oct 2019 16:10:57 +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 x94GAv6Z040365 for ; Fri, 4 Oct 2019 16:10:57 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id x94GAvbL040364 for bugs@FreeBSD.org; Fri, 4 Oct 2019 16:10:57 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 241059] random kernel panics Date: Fri, 04 Oct 2019 16:10:57 +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: 12.1-RELEASE X-Bugzilla-Keywords: crash, panic X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: markj@FreeBSD.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: 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: 2.1.29 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 04 Oct 2019 16:10:58 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D241059 --- Comment #4 from Mark Johnston --- This particular crash was caused by a bit-flip. %rcx contains a direct map address with one of the upper bits set to 0: ... 0xffffffff81098b43 <+1267>: jmp 0xffffffff81098bc0 0xffffffff81098b45 <+1269>: add $0xffffffffffffffff,%rax=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20 0xffffffff81098b49 <+1273>: mov %rax,0x78(%r8)=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0xffffffff81098b4d <+1277>: mov 0x48(%rdx,%rbx,8),%rax=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0xffffffff81098b52 <+1282>: mov %rsi,%rcx=20=20=20=20=20=20=20=20=20= =20=20=20=20 0xffffffff81098b55 <+1285>: add $0x40,%rcx=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20 0xffffffff81098b59 <+1289>: test %rax,%rax=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0xffffffff81098b5c <+1292>: lea 0x10(%rax),%rax=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0xffffffff81098b60 <+1296>: cmove %rcx,%rax=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0xffffffff81098b64 <+1300>: mov 0x50(%rdx,%rbx,8),%rcx=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0xffffffff81098b69 <+1305>: mov %rcx,(%rax)=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0xffffffff81098b6c <+1308>: mov 0x48(%rdx,%rbx,8),%rax=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0xffffffff81098b71 <+1313>: mov 0x50(%rdx,%rbx,8),%rcx=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20 =3D> 0xffffffff81098b76 <+1318>: mov %rax,(%rcx)=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 ... (kgdb) info reg rax 0x0 0 rbx 0x1e0 480 rcx 0xf7fff802c4df2d20 -576469536503550688 ^ rdx 0xfffff806af211000 -8767385038848 rsi 0xfffff807f0b673f0 -8761989762064 rdi 0xffffffff81a49240 -2119921088 rbp 0xfffffe009c39e8c0 0xfffffe009c39e8c0 rsp 0xfffffe009c39e7e0 0xfffffe009c39e7e0 --=20 You are receiving this mail because: You are the assignee for the bug.=