Description of problem: Dom0 crashes when installing GPLPV drivers on Windows 2008 R2 guest. Xen version: 3.1.2-194.11.3.el5 Dom0 kernel: 2.6.18-194.11.3.el5xen GPLPV: gplpv_Vista2008x64_0.11.0.213.msi and older Redirected to serial console output: Unable to handle kernel NULL pointer dereference at 0000000000000108 RIP: [<ffffffff8883f03f>] :blkbk:update_blkif_status+0x21f/0x2ae PGD 0 Oops: 0000 [1] SMP last sysfs file: /class/net/lo/ifindex CPU 2 Modules linked in: tun xfs ocfs2(U) ipt_MASQUERADE netloop iptable_nat ip_nat netbk blktap blkbk mptctl mptbase ipmi_watchdog ipmi_si(U) ipmi_devintf(U) ipmi_msghandler(U) autofs4 hidp l2cap bluetooth ocfs2_dlmfs(U) ocfs2_dlm(U) ocfs2_nodemanager(U) configfs lockd sunrpc bonding ip_conntrack_netbios_ns ipt_REJECT xt_state ip_conntrack nfnetlink xt_physdev bridge iptable_filter ip_tables ip6t_REJECT xt_tcpudp ip6table_filter ip6_tables x_tables ipv6 xfrm_nalgo crypto_api be2iscsi ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp bnx2i(U) cnic(U) cxgb3i cxgb3 libiscsi_tcp libiscsi2 scsi_transport_iscsi2 scsi_transport_iscsi loop dm_round_robin dm_multipath scsi_dh video backlight sbs power_meter hwmon i2c_ec i2c_core dell_wmi wmi button battery asus_acpi ac parport_pc lp parport sr_mod cdrom sg serio_raw pcspkr hpilo serial_core bnx2x(U) 8021q dm_raid45 dm_message dm_region_hash dm_mem_cache dm_snapshot dm_zero dm_mirror dm_log dm_mod usb_storage shpchp cciss(U) sd_mod scsi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd Pid: 69, comm: xenwatch Tainted: G 2.6.18-194.11.3.el5xen 0000001 RIP: e030:[<ffffffff8883f03f>] [<ffffffff8883f03f>] :blkbk:update_blkif_status+0x21f/0x2ae RSP: e02b:ffff88003e413df0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88003db2f620 RCX: 0000000000000003 RDX: ffffffffff578000 RSI: fffffffffffffffb RDI: 0000000000000000 RBP: ffff880031227b70 R08: 00000000ffffffff R09: 0000000000000020 R10: 00000000ffffffff R11: 0000000000000000 R12: ffff8800087edb40 R13: 0000000000000000 R14: ffff880000e0bcf0 R15: ffffffff8029c1ef FS: 00002b79280d26e0(0000) GS:ffffffff805d2100(0000) knlGS:0000000000000000 CS: e033 DS: 0000 ES: 0000 Process xenwatch (pid: 69, threadinfo ffff88003e412000, task ffff88003e3ea080) Stack: 2e6b6361626b6c62 0000006364682e33 ffff880000000025 ffff8800087edb40 ffff880034383c00 ffff8800087edb40 ffff880034383c00 ffffffff8883f2eb 6669636570736e75 737361202c646569 Call Trace: [<ffffffff8883f2eb>] :blkbk:frontend_changed+0x21d/0x226 [<ffffffff803b9c78>] xenwatch_thread+0x0/0x135 [<ffffffff803b90ca>] xenwatch_handle_callback+0x15/0x48 [<ffffffff803b9d94>] xenwatch_thread+0x11c/0x135 [<ffffffff8029c407>] autoremove_wake_function+0x0/0x2e [<ffffffff8029c1ef>] keventd_create_kthread+0x0/0xc4 [<ffffffff80233be4>] kthread+0xfe/0x132 [<ffffffff80260b2c>] child_rip+0xa/0x12 [<ffffffff8029c1ef>] keventd_create_kthread+0x0/0xc4 [<ffffffff80233ae6>] kthread+0x0/0x132 [<ffffffff80260b22>] child_rip+0x0/0x12 Code: 48 8b b8 08 01 00 00 e8 b3 f6 a7 f7 85 c0 89 c6 74 0d 48 8b RIP [<ffffffff8883f03f>] :blkbk:update_blkif_status+0x21f/0x2ae RSP <ffff88003e413df0> CR2: 0000000000000108 <0>Kernel panic - not syncing: Fatal exception (XEN) Domain 0 crashed: rebooting machine in 5 seconds. http://bugs.centos.org/bug_view_advanced_page.php?bug_id=4517 Acknowledgements: Red Hat would like to thank Vladymyr Denysov for reporting this issue.
This issue has been addressed in following products: Red Hat Enterprise Linux 5 Via RHSA-2011:0017 https://rhn.redhat.com/errata/RHSA-2011-0017.html