** Changed in: linux-azure (Ubuntu) Importance: Undecided => High ** Changed in: linux-azure (Ubuntu) Status: New => In Progress
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-azure in Ubuntu. https://bugs.launchpad.net/bugs/1822118 Title: Kernel Panic while rebooting cloud instance Status in linux-azure package in Ubuntu: In Progress Bug description: Description: In the event a particular Azure cloud instance is rebooted it's possible that it may never recover and the instance will break indefinitely. In My case, it was a kernel panic. See specifics below.. Series: Disco Instance Size: Basic_A3 Region: (Default) US-WEST-2 Kernel Version: 4.18.0-1013-azure #13-Ubuntu SMP Thu Feb 28 22:54:16 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux I had a simple script to reboot an instance (X) amount of times, I chose 50, so the machine would power cycle by issuing a "reboot" from the terminal prompt just as a user would. Once the machine came up, it captured dmesg and other bits then rebooted again until it reached 50. After the 4th attempt, my script timed out, I took a look at the instance console log and the following displayed on the console. [ OK ] Reached target Reboot. /shutdown: error while loading shared libra[ 89.498980] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00007f00 [ 89.498980] [ 89.500042] CPU: 0 PID: 1 Comm: shutdown Not tainted 4.18.0-1013-azure #13-Ubuntu [ 89.508026] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS 090007 06/02/2017 [ 89.508026] Call Trace: [ 89.508026] dump_stack+0x63/0x8a [ 89.508026] panic+0xe7/0x247 [ 89.508026] do_exit.cold.23+0x26/0x75 [ 89.508026] do_group_exit+0x43/0xb0 [ 89.508026] __x64_sys_exit_group+0x18/0x20 [ 89.508026] do_syscall_64+0x5a/0x110 [ 89.508026] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 89.508026] RIP: 0033:0x7f7bf0154d86 [ 89.508026] Code: Bad RIP value. [ 89.508026] RSP: 002b:00007ffd6be693b8 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7 [ 89.508026] RAX: ffffffffffffffda RBX: 00007f7bf015e420 RCX: 00007f7bf0154d86 [ 89.508026] RDX: 000000000000007f RSI: 000000000000003c RDI: 000000000000007f [ 89.508026] RBP: 00007f7bef9449c0 R08: 00000000000000e7 R09: 00000000ffffffff [ 89.508026] R10: 00007ffd6be6974c R11: 0000000000000206 R12: 0000000000000018 [ 89.508026] R13: 00007f7bef944ac8 R14: 00007f7bef944a00 R15: 0000000000000000 [ 89.508026] Kernel Offset: 0x16000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 89.508026] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x00007f00 [ 89.508026] ]--- this only occurred once in my testing. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/1822118/+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