From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============8864044671821500176==" MIME-Version: 1.0 From: Andy Lutomirski To: lkp@lists.01.org Subject: Re: [x86LKP] PANIC: double fault, error_code: 0xffffffffffffffff Date: Mon, 06 Oct 2014 12:39:41 -0700 Message-ID: <5432EFFD.6090201@amacapital.net> In-Reply-To: <20141005063802.GE3264@tassilo.jf.intel.com> List-Id: --===============8864044671821500176== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable On 10/04/2014 11:38 PM, Andi Kleen wrote: >> [ 5.087621] Freeing unused kernel memory: 1248K (ffff8800014c8000 - f= fff880001600000) >> [ 5.136856] Freeing unused kernel memory: 1936K (ffff88000181c000 - f= fff880001a00000) >> [ 5.167951] random: init urandom read with 5 bits of entropy available >> [ 19.307116] PANIC: double fault, error_code: 0xffffffffffffffff >> [ 19.309941] Kernel panic - not syncing: Machine halted. > = > That's odd. I actually tested it in KVM. > = > Will try with your config. In case it helps, Fengguang's bot seems to use rather old userspace code. It's entirely possible that it's doing something different with arch_prctl than your userspace, causing gs or gsbase to behave differently. --Andy > = >> kvm=3D( >> qemu-system-x86_64 >> -cpu kvm64 >> -enable-kvm >> -kernel $kernel >> -initrd $initrd >> -m 320 >> -smp 2 >> -net nic,vlan=3D1,model=3De1000 >> -net user,vlan=3D1 >> -boot order=3Dnc >> -no-reboot >> -watchdog i6300esb >> -rtc base=3Dlocaltime >> -serial stdio >> -display none >> -monitor null = >> ) > = > -Andi > = --===============8864044671821500176==--