Re: [Qemu-devel] [PATCHv3 1/5] seccomp: adding new syscalls (bugzilla 855162)

[Paul Moore <pmoore@redhat.com>]

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On Monday, November 26, 2012 03:41:00 PM Paul Moore wrote:
> On Monday, November 26, 2012 02:59:21 PM Corey Bryant wrote:
> > On 11/26/2012 12:08 PM, Paul Moore wrote:
> > > On Monday, November 26, 2012 11:41:06 AM Corey Bryant wrote:
> > >> On 11/21/2012 10:24 AM, Paul Moore wrote:
> > >>> On Wednesday, November 21, 2012 11:20:44 AM Eduardo Otubo wrote:
> > >>>> Hello folks,
> > >>>> 
> > >>>> Does anyone had a chance to take a look at this? We would like to get
> > >>>> this into the 1.3 release.
> > >>>> 
> > >>>> Thanks again :)
> > >>> 
> > >>> I way a bit delayed due to travel, but I started playing with it a bit
> > >>> yesterday afternoon and unfortunately it still doesn't work for me
> > >>> (using the same test/reproducer I documented in the RH BZ).  I've
> > >>> tried running QEMU both via libvirt and the command line (using a
> > >>> libvirt derived command line).
> > >>> 
> > >>> I'm applying the patches to the F17 QEMU 1.2 package; there is some
> > >>> minor fixup needed in the configure script but nothing major.
> > >>> 
> > >>> What is further frustrating is that the debug code (patch 5/5) doesn't
> > >>> seem to output the problematic syscall.  I wanted to investigate this
> > >>> a bit more before responding, but with the holiday approaching
> > >>> (Thanksgiving in the US), I'm not sure how much progress I'll be able
> > >>> to make for the remainder of this week.  Sorry about that.
> > >>> 
> > >>> If you have any further questions about how, or what, I'm testing,
> > >>> just ask.
> > >> 
> > >> Paul, Is your host 32 or 64-bit?
> > > 
> > > 64-bit
> > 
> > I'm having trouble recreating this.  I'm running a Fedora 17 64-bit host
> > and a Fedora 17 64-bit guest with domain XML that mirrors yours.
> > 
> > Here's the domain XML I'm using and the resulting QEMU command line:
> > 
> > Domain XML:   http://pastebin.com/DWa4RQ1Y
> > Command line: http://pastebin.com/2QTWsUhP
> > 
> > I'm running with QEMU commit 8db972cfa469b4e4afd9c65e54e796b83b5ce3a2
> > which is 1.2.0 with: (a) just the first patch applied, as well as with
> > (b) all of this patch series applied.
> > 
> > Any thoughts on what could be different?
> 
> Like I said earlier, I'm running with the F17 QEMU 1.2 package,
> qemu-1.2.0-16.fc18 to be exact, with Eduardo's patches applied on top.
> 
> I'm currently testing another set of interim patches from Eduardo that was
> sent off-list for testing (you were CC'd); hopefully that will resolve the
> problem.

Unfortunately, the latest patches from Eduardo met with the same fate.  Here 
is more detailed information on my system (HP DL160 G5, F17, 64-bit):

# uname -r
3.6.7-4.fc17.x86_64

[NOTE: standard F17 kernel]

# rpm -qa | grep qemu
qemu-kvm-tools-1.2.0-16.pm5.fc17.x86_64
qemu-common-1.2.0-16.pm5.fc17.x86_64
qemu-kvm-1.2.0-16.pm5.fc17.x86_64
ipxe-roms-qemu-20120328-1.gitaac9718.fc17.noarch
qemu-img-1.2.0-16.pm5.fc17.x86_64
qemu-system-x86-1.2.0-16.pm5.fc17.x86_64

[NOTE: the 'pm5' is my designation indicating the patched version]

# ./qemu_seccomp.sh -sandbox off
char device redirected to /dev/pts/0
do_spice_init: starting 0.10.1
spice_server_add_interface: SPICE_INTERFACE_MIGRATION
spice_server_add_interface: SPICE_INTERFACE_KEYBOARD
spice_server_add_interface: SPICE_INTERFACE_MOUSE
spice_server_add_interface: SPICE_INTERFACE_QXL
red_worker_main: begin
display_channel_create: create display channel
cursor_channel_create: create cursor channel
spice_server_add_interface: SPICE_INTERFACE_PLAYBACK
spice_server_add_interface: SPICE_INTERFACE_RECORD
[NOTE: I hit Ctrl-C at this point]
qemu: terminating on signal 2
spice_server_remove_interface: remove SPICE_INTERFACE_PLAYBACK
spice_server_remove_interface: remove SPICE_INTERFACE_RECORD

# ./qemu_seccomp.sh -sandbox on
char device redirected to /dev/pts/0
do_spice_init: starting 0.10.1
spice_server_add_interface: SPICE_INTERFACE_MIGRATION
spice_server_add_interface: SPICE_INTERFACE_KEYBOARD
spice_server_add_interface: SPICE_INTERFACE_MOUSE
spice_server_add_interface: SPICE_INTERFACE_QXL
red_worker_main: begin
./qemu_seccomp.sh: line 28: 21085 Bad system call         /usr/bin/qemu-kvm -S 
-M pc-0.14 -enable-kvm -m 2048 -smp 2,sockets=2,cores=1,threads=1 -name f16-
test-1 -uuid 13c7da9b-a79a-0688-267a-8206136bc8d6 -nodefconfig -nodefaults -
chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/f16-
test-1.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control 
-rtc base=utc -no-shutdown -device virtio-serial-pci,id=virtio-
serial0,bus=pci.0,addr=0x5 -device piix3-usb-
uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive file=/var/lib/libvirt/images/f16-
test-1.img,if=none,id=drive-virtio-disk0,format=raw -device virtio-blk-
pci,scsi=off,bus=pci.0,addr=0x6,drive=drive-virtio-disk0,id=virtio-
disk0,bootindex=1 -netdev user,id=hostnet0 -device virtio-net-
pci,netdev=hostnet0,id=net0,mac=52:54:00:9a:9d:63,bus=pci.0,addr=0x3 -chardev 
pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev 
spicevmc,id=charchannel0,name=vdagent -device virtserialport,bus=virtio-
serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 -
device usb-tablet,id=input0 -spice port=5900,addr=127.0.0.1,disable-ticketing 
-vga qxl -global qxl-vga.vram_size=67108864 -device intel-
hda,id=sound0,bus=pci.0,addr=0x4 -device hda-duplex,id=sound0-
codec0,bus=sound0.0,cad=0 -device virtio-balloon-
pci,id=balloon0,bus=pci.0,addr=0x7 $*

[NOTE: my test script, qemu_seccomp.sh, is attached]

-- 
paul moore
security and virtualization @ redhat

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