Hi Chris, Here is the list of commits used in test kernel:
0f22bce staging: lustre: check kzalloc return value 1d67237 Drivers: hv: vmbus: prefer 'die' notification chain to 'panic' a28d64c Drivers: hv: vmbus: add special crash handler 5990a10 Drivers: hv: don't do hypercalls when hypercall_page is NULL 7d8e182 Drivers: hv: vmbus: add special kexec handler c3e9e25 kexec: define kexec_in_progress in !CONFIG_KEXEC case e051d15 Drivers: hv: vmbus: Implement the protocol for tearing down vmbus state 7f0f4f3 Drivers: hv: vmbus: unregister panic notifier on module unload 2f940da hv: run non-blocking message handlers in the dispatch tasklet ce30250 Drivers: hv: vmbus: Add support for VMBus panic notifier handler 9ed3a0e Drivers: hv: vmbus: Teardown clockevent devices on module unload 25a696e clockevents: export clockevents_unbind_device instead of clockevents_unbind 891b295 drivers: hv: vmbus: Teardown synthetic interrupt controllers on module unload 3efe049 Drivers: hv: vmbus: teardown hv_vmbus_con workqueue and vmbus_connection pages on shutdown 45a0fc8 Drivers: hv: vmbus: prevent cpu offlining on newer hypervisors The following commits did not cherry-pick cleanly and needed backporting: e513229, 96c1d05, 652594c, 2db84ef, 2517281 and 510f7aef The subjects listed above are the same as in mainline, but SHA1s are different, since that is from my local repo. Just let me know if you need me to post the original SHA1s and I will -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1440103 Title: [Hyper-V] Kernel panic not functional on Vivid Status in linux package in Ubuntu: In Progress Status in linux source package in Vivid: In Progress Status in linux source package in Wily: Fix Released Bug description: Issue description: Triggering a kernel panic will not produce a crash dump file. Steps to Reproduce: 1. install kdump related packages. 2. verify crashmem value - defaults to 384M-:129M 3. verify that the system is ready for crash: # cat /sys/kernel/kexec_crash_loaded 1 4. trigger kernel panic with # echo c | sudo tee /proc/sysrq-trigger 5. The system will freeze and no kernel dump will be generated, system is not rebooted automatically as configured in kdump-tools config. Versions details: Windows Server Host Edition: Microsoft Windows Server 2012 R2 Datacenter build 9600 Distribution name and release: Ubuntu Vivid Vervet Kernel version: Linux ubuntu31 3.19.0-11-generic #11lp14233432v201504021617 SMP Repro output with VM settings as follows: 2GB RAM, 1vCPU, crashmem: 384M:128M OR 384M:128M [ 149.328829] SysRq : Trigger a crash [ 149.342418] BUG: unable to handle kernel NULL pointer dereference at (null) [ 149.346369] IP: [<ffffffff814ae776>] sysrq_handle_crash+0x16/0x20 [ 149.346369] PGD 367a3067 PUD 7bdf0067 PMD 0 [ 149.346369] Oops: 0002 [#1] SMP [ 149.346369] Modules linked in: joydev hid_generic hid_hyperv serio_raw hid 8250_fintek hyperv_keyboard hv_balloon hyp erv_fb i2c_piix4 mac_hid autofs4 hv_netvsc hv_utils hv_storvsc psmouse floppy pata_acpi hv_vmbus [ 149.346369] CPU: 0 PID: 1379 Comm: tee Not tainted 3.19.0-11-generic #11lp14233432v201504021617 [ 149.346369] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS 090006 05/23/2012 [ 149.346369] task: ffff88007a7d3ae0 ti: ffff88007be7c000 task.ti: ffff88007be7c000 [ 149.346369] RIP: 0010:[<ffffffff814ae776>] [<ffffffff814ae776>] sysrq_handle_crash+0x16/0x20 [ 149.346369] RSP: 0018:ffff88007be7fe68 EFLAGS: 00010292 [ 149.346369] RAX: 000000000000000f RBX: 0000000000000063 RCX: 000000000000000f [ 149.346369] RDX: ffff88007ce0fd78 RSI: ffff88007ce0e498 RDI: 0000000000000063 [ 149.346369] RBP: ffff88007be7fe68 R08: 0000000000000002 R09: 0000000000000275 [ 149.346369] R10: 0000000000000092 R11: 0000000000000275 R12: 0000000000000004 [ 149.346369] R13: 0000000000000000 R14: ffffffff81cb38e0 R15: 0000000000000008 [ 149.346369] FS: 00007f0a2e22a700(0000) GS:ffff88007ce00000(0000) knlGS:0000000000000000 [ 149.346369] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 149.346369] CR2: 0000000000000000 CR3: 0000000036047000 CR4: 00000000000006f0 [ 149.346369] Stack: [ 149.346369] ffff88007be7fe98 ffffffff814aef96 0000000000000002 fffffffffffffffb [ 149.346369] 00007ffc64e934b0 0000000000000002 ffff88007be7feb8 ffffffff814af443 [ 149.346369] 00007ffc64e934b0 ffff8800364f15c0 ffff88007be7fed8 ffffffff8125ad98 [ 149.346369] Call Trace: [ 149.346369] [<ffffffff814aef96>] __handle_sysrq+0x106/0x170 [ 149.346369] [<ffffffff814af443>] write_sysrq_trigger+0x33/0x40 [ 149.346369] [<ffffffff8125ad98>] proc_reg_write+0x48/0x70 [ 149.346369] [<ffffffff811f33d7>] vfs_write+0xb7/0x1f0 [ 149.346369] [<ffffffff811f3ece>] ? vfs_read+0x11e/0x140 [ 149.346369] [<ffffffff811f3fe6>] SyS_write+0x46/0xb0 [ 149.346369] [<ffffffff817c924d>] system_call_fastpath+0x16/0x1b [ 149.346369] Code: ef e8 df f7 ff ff eb d8 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 66 66 66 66 90 55 c7 05 34 42 a3 00 01 00 00 00 48 89 e5 0f ae f8 <c6> 04 25 00 00 00 00 01 5d c3 66 66 66 66 90 55 31 c0 48 89 e5 [ 149.346369] RIP [<ffffffff814ae776>] sysrq_handle_crash+0x16/0x20 [ 149.346369] RSP <ffff88007be7fe68> [ 149.346369] CR2: 0000000000000000 [ 0.000000] Initializing cgroup subsys cpuset [ 0.000000] Initializing cgroup subsys cpu [ 0.000000] Initializing cgroup subsys cpuacct [ 0.000000] Linux version 3.19.0-11-generic (apw@gloin) (gcc version 4.9.2 (Ubuntu 4.9.2-10ubuntu12) ) #11lp14233432v 201504021617 SMP Thu Apr 2 15:15:51 UTC 2015 (Ubuntu 3.19.0-11.11lp14233432v201504021617-generic 3.19.3) [ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-3.19.0-11-generic root=/dev/mapper/ubuntu31--vg-root ro console=tty0 co nsole=ttyS1 irqpoll maxcpus=1 nousb systemd.unit=kdump-tools.service elfcorehdr=867700K To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1440103/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
