** Attachment added: "Panic stack trace" https://bugs.launchpad.net/ubuntu/+source/kernel-package/+bug/1829652/+attachment/5264773/+files/panic_stack_trace.txt
** Description changed: Hi, I've recently upgraded my system to ubuntu 19.04, and kernel consistently panics when I boot a virtual machine using an SR-IOV VFIO virtual function. Could reproduce with 5.0.0-13-generic and 5.0.0-15-generic, doesn't happen with 4.18.0-20-generic. I'm using libvirt and VM is using KVM, XML snippet to delegate virtual function to VM is: - <hostdev mode='subsystem' type='pci' managed='yes'> - <driver name='vfio'/> - <source> - <address domain='0x0000' bus='0x05' slot='0x10' function='0x0'/> - </source> - <alias name='hostdev0'/> - <address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x0'/> - </hostdev> + <hostdev mode='subsystem' type='pci' managed='yes'> + <driver name='vfio'/> + <source> + <address domain='0x0000' bus='0x05' slot='0x10' function='0x0'/> + </source> + <alias name='hostdev0'/> + <address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x0'/> + </hostdev> As soon as I start the VM using "virsh start vm", kernel panics. I'm using X550T intel NIC (lspci output: Ethernet controller: Intel - Corporation Ethernet Controller 10G X550T (rev 01)) on an Supermicro + Corporation Ethernet Controller 10G X550T (rev 01)) on a Supermicro X11SSH-CTF motherboard, with up to date bios and 4 virtual functions (class/net/em1/device/sriov_numvfs = 4). Given panic stack trace (see attachment), I've narrowed down the bug to ixgbe_ipsec_vf_clear function in upstream ixgbe driver: https://github.com/torvalds/linux/blob/72cf0b07418a9c8349aa9137194b1ccba6e54a9d/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c#L840 When I comment its usage (https://github.com/torvalds/linux/blob/72cf0b07418a9c8349aa9137194b1ccba6e54a9d/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c#L734), everything works as expected (I'm not using any ipsec feature). Didn't try to fix the ixgbe_ipsec_vf_clear function though. Please find attached a stack trace collected using IPMI serial-over-lan. ** Package changed: kernel-package (Ubuntu) => linux (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1829652 Title: Kernel panic upon resetting ixgbe SR-IOV VFIO virtual function using 5.0 kernel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1829652/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
