https://bugzilla.kernel.org/show_bug.cgi?id=195813 Bug ID: 195813 Summary: intel gvt/kvmgt: BUG: unable to handle kernel NULL pointer dereference at (null) Product: Virtualization Version: unspecified Kernel Version: linux-4.11.1 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: kvm Assignee: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx Reporter: bu9zilla@xxxxxxxxx Regression: No Hi, trying out intel gvt/kvmgt on a i7-6700 CPU with a Intel Corporation HD Graphics 530 onboard gpu. I've followed following guide to try it out: https://github.com/01org/gvt-linux/wiki/GVTg_Setup_Guide However, even though i can generate the VGPU on the host, as soon i try to boot the guest, kvmgt/i915 crashes with following error: May 18 20:44:24 tunafix kernel: vfio_pin_page_external: Task qemu-system-x86 (4636) RLIMIT_MEMLOCK (65536) exceeded May 18 20:44:24 tunafix kernel: vfio_pin_page_external: Task qemu-system-x86 (4633) RLIMIT_MEMLOCK (65536) exceeded May 18 20:44:25 tunafix kernel: vfio_pin_page_external: Task qemu-system-x86 (4636) RLIMIT_MEMLOCK (65536) exceeded May 18 20:44:25 tunafix kernel: vfio_pin_page_external: Task qemu-system-x86 (4633) RLIMIT_MEMLOCK (65536) exceeded May 18 20:44:25 tunafix kernel: BUG: unable to handle kernel NULL pointer dereference at (null) May 18 20:44:25 tunafix kernel: IP: __wake_up_common+0x20/0x80 May 18 20:44:25 tunafix kernel: PGD 0 May 18 20:44:25 tunafix kernel: May 18 20:44:25 tunafix kernel: Oops: 0000 [#1] SMP May 18 20:44:25 tunafix kernel: CPU: 3 PID: 4636 Comm: qemu-system-x86 Not tainted 4.11.1-gentoo #1 May 18 20:44:25 tunafix kernel: Hardware name: FUJITSU D3401-H1/D3401-H1, BIOS V5.0.0.11 R1.13.0.SR.1 for D3401-H1x 02/29/2016 May 18 20:44:25 tunafix kernel: vfio_pin_page_external: Task qemu-system-x86 (4636) RLIMIT_MEMLOCK (65536) exceeded May 18 20:44:25 tunafix kernel: vfio_pin_page_external: Task qemu-system-x86 (4633) RLIMIT_MEMLOCK (65536) exceeded May 18 20:44:25 tunafix kernel: BUG: unable to handle kernel NULL pointer dereference at (null) May 18 20:44:25 tunafix kernel: IP: __wake_up_common+0x20/0x80 May 18 20:44:25 tunafix kernel: PGD 0 May 18 20:44:25 tunafix kernel: May 18 20:44:25 tunafix kernel: Oops: 0000 [#1] SMP May 18 20:44:25 tunafix kernel: CPU: 3 PID: 4636 Comm: qemu-system-x86 Not tainted 4.11.1-gentoo #1 May 18 20:44:25 tunafix kernel: Hardware name: FUJITSU D3401-H1/D3401-H1, BIOS V5.0.0.11 R1.13.0.SR.1 for D3401-H1x 02/29/2016 May 18 20:44:25 tunafix kernel: task: ffff9436caec8000 task.stack: ffff9f000d4b8000 May 18 20:44:25 tunafix kernel: RIP: 0010:__wake_up_common+0x20/0x80 May 18 20:44:25 tunafix kernel: RSP: 0018:ffff9f000d4bbc58 EFLAGS: 00010082 May 18 20:44:25 tunafix kernel: RAX: 0000000000000246 RBX: ffff943720211ac8 RCX: 0000000000000000 May 18 20:44:25 tunafix kernel: RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff943720211ac8 May 18 20:44:25 tunafix kernel: RBP: ffff943720211ad0 R08: 0000000000000000 R09: 0000000000000000 May 18 20:44:25 tunafix kernel: R10: 0000000179143000 R11: 0000000179146000 R12: 0000000000000003 May 18 20:44:25 tunafix kernel: R13: 0000000000000001 R14: 0000000000000003 R15: ffff9436c8c97300 May 18 20:44:25 tunafix kernel: FS: 00007fb128586700(0000) GS:ffff94376e4c0000(0000) knlGS:0000000000000000 May 18 20:44:25 tunafix kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 May 18 20:44:25 tunafix kernel: task: ffff9436caec8000 task.stack: ffff9f000d4b8000 May 18 20:44:25 tunafix kernel: RIP: 0010:__wake_up_common+0x20/0x80 May 18 20:44:25 tunafix kernel: RSP: 0018:ffff9f000d4bbc58 EFLAGS: 00010082 May 18 20:44:25 tunafix kernel: RAX: 0000000000000246 RBX: ffff943720211ac8 RCX: 0000000000000000 May 18 20:44:25 tunafix kernel: RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff943720211ac8 May 18 20:44:25 tunafix kernel: RBP: ffff943720211ad0 R08: 0000000000000000 R09: 0000000000000000 May 18 20:44:25 tunafix kernel: R10: 0000000179143000 R11: 0000000179146000 R12: 0000000000000003 May 18 20:44:25 tunafix kernel: R13: 0000000000000001 R14: 0000000000000003 R15: ffff9436c8c97300 May 18 20:44:25 tunafix kernel: FS: 00007fb128586700(0000) GS:ffff94376e4c0000(0000) knlGS:0000000000000000 May 18 20:44:25 tunafix kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 May 18 20:44:25 tunafix kernel: CR2: 0000000000000000 CR3: 0000000f8ac6c000 CR4: 00000000003426e0 May 18 20:44:25 tunafix kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 May 18 20:44:25 tunafix kernel: DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 May 18 20:44:25 tunafix kernel: Call Trace: May 18 20:44:25 tunafix kernel: ? __wake_up+0x2f/0x50 May 18 20:44:25 tunafix kernel: ? intel_vgpu_submit_execlist+0x6e3/0x890 [i915] May 18 20:44:25 tunafix kernel: ? elsp_mmio_write+0xc8/0x150 [i915] May 18 20:44:25 tunafix kernel: ? intel_vgpu_emulate_mmio_write+0x42d/0x660 [i915] May 18 20:44:25 tunafix kernel: ? __kernel_fpu_end+0x48/0xb0 May 18 20:44:25 tunafix kernel: ? intel_vgpu_rw+0x147/0x1c0 [kvmgt] May 18 20:44:25 tunafix kernel: CR2: 0000000000000000 CR3: 0000000f8ac6c000 CR4: 00000000003426e0 May 18 20:44:25 tunafix kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 May 18 20:44:25 tunafix kernel: DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 May 18 20:44:25 tunafix kernel: Call Trace: May 18 20:44:25 tunafix kernel: ? __wake_up+0x2f/0x50 May 18 20:44:25 tunafix kernel: ? intel_vgpu_submit_execlist+0x6e3/0x890 [i915] May 18 20:44:25 tunafix kernel: ? elsp_mmio_write+0xc8/0x150 [i915] May 18 20:44:25 tunafix kernel: ? intel_vgpu_emulate_mmio_write+0x42d/0x660 [i915] May 18 20:44:25 tunafix kernel: ? __kernel_fpu_end+0x48/0xb0 May 18 20:44:25 tunafix kernel: ? intel_vgpu_rw+0x147/0x1c0 [kvmgt] May 18 20:44:25 tunafix kernel: ? intel_vgpu_write+0x136/0x160 [kvmgt] May 18 20:44:25 tunafix kernel: ? __vfs_write+0x1e/0x120 May 18 20:44:25 tunafix kernel: ? do_vfs_ioctl+0x8a/0x5a0 May 18 20:44:25 tunafix kernel: ? vfs_write+0xaf/0x1b0 May 18 20:44:25 tunafix kernel: ? kvm_on_user_return+0x5a/0x90 May 18 20:44:25 tunafix kernel: ? SyS_pwrite64+0x6c/0x80 May 18 20:44:25 tunafix kernel: ? entry_SYSCALL_64_fastpath+0x1a/0xa9 May 18 20:44:25 tunafix kernel: Code: 90 66 2e 0f 1f 84 00 00 00 00 00 41 57 41 56 41 89 f6 41 55 41 54 55 53 48 8d 6f 08 48 83 ec 08 89 54 24 04 48 8b 57 08 48 39 d5 <48> 8b 32 74 48 41 89 cd 4d 89 c4 48 8d 42 e8 4c 8d 7e e8 eb 03 May 18 20:44:25 tunafix kernel: RIP: __wake_up_common+0x20/0x80 RSP: ffff9f000d4bbc58 May 18 20:44:25 tunafix kernel: ? intel_vgpu_write+0x136/0x160 [kvmgt] May 18 20:44:25 tunafix kernel: ? __vfs_write+0x1e/0x120 May 18 20:44:25 tunafix kernel: ? do_vfs_ioctl+0x8a/0x5a0 May 18 20:44:25 tunafix kernel: ? vfs_write+0xaf/0x1b0 May 18 20:44:25 tunafix kernel: ? kvm_on_user_return+0x5a/0x90 May 18 20:44:25 tunafix kernel: ? SyS_pwrite64+0x6c/0x80 May 18 20:44:25 tunafix kernel: ? entry_SYSCALL_64_fastpath+0x1a/0xa9 May 18 20:44:25 tunafix kernel: Code: 90 66 2e 0f 1f 84 00 00 00 00 00 41 57 41 56 41 89 f6 41 55 41 54 55 53 48 8d 6f 08 48 83 ec 08 89 54 24 04 48 8b 57 08 48 39 d5 <48> 8b 32 74 48 41 89 cd 4d 89 c4 48 8d 42 e8 4c 8d 7e e8 eb 03 May 18 20:44:25 tunafix kernel: RIP: __wake_up_common+0x20/0x80 RSP: ffff9f000d4bbc58 May 18 20:44:25 tunafix kernel: CR2: 0000000000000000 May 18 20:44:25 tunafix kernel: ---[ end trace c1c0ee8078d3b02f ]--- May 18 20:44:25 tunafix kernel: CR2: 0000000000000000 May 18 20:44:25 tunafix kernel: ---[ end trace c1c0ee8078d3b02f ]--- vfio_pin_page_external: Task qemu-system-x86 (4636) RLIMIT_MEMLOCK (65536) exceeded errors are cut, as there are even more of the same message. The VM gets started as followed: /usr/bin/qemu-system-x86_64 -name panoramix -monitor unix:/run/kvm/kvm.panoramix.sock,server,nowait -balloon virtio -pidfile /run/kvm/kvm.panoramix.pid -runas qemu -m 4096 -smp cores=2,threads=1,sockets=1 -machine q35 -k de -cpu host -kernel /media/vms/kernel/gentoo-4.11-r2 -initrd /media/vms/kernel/initrd-v2.cpio.gz -append root=/dev/vda2 quiet video=1920x1200@60 -enable-kvm -daemonize -device virtio-serial -chardev spicevmc,id=vdagent,name=vdagent -device virtserialport,chardev=vdagent,name=com.redhat.spice.0 -device virtio-serial -chardev socket,path=/run/kvm/kvm.panoramix.qga.sock,server,nowait,id=panoramix-qga -device virtserialport,chardev=panoramix-qga,name=org.qemu.guest_agent.0 -chardev spicevmc,name=usbredir,id=usbredirchardev2 -device usb-redir,chardev=usbredirchardev2,id=usbredirdev2,debug=3 -chardev spicevmc,name=usbredir,id=usbredirchardev1 -device usb-redir,chardev=usbredirchardev1,id=usbredirdev1,debug=3 -spice port=5811,addr=192.168.2.30 -drive file=/media/vms/hds/panoramix_hd1.qcow2,if=virtio,cache=writethrough,aio=threads -netdev tap,id=panoramix_4,ifname=qtap4,script=no,downscript=no -device virtio-net-pci,netdev=panoramix_4,mac=AA:6E:17:00:80:05 -fsdev local,id=panoramix_9p_0,path=/usr/portage,security_model=none -device virtio-9p-pci,fsdev=panoramix_9p_0,mount_tag=portage -usb -usbdevice tablet -vga qxl -device vfio-pci,sysfsdev=/sys/bus/pci/devices/0000:00:02.0/487405b5-e2fb-462c-8631-7000490f426f,rombar=0 Hostkernel: 4.11.1 Guestkernel: 4.11 -- You are receiving this mail because: You are watching the assignee of the bug.
