[Bug 1822118] Re: Kernel Panic while rebooting cloud instance
Colin Ian King
1822118 at bugs.launchpad.net
Fri Sep 27 07:37:37 UTC 2019
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IP addr Mac Addr Kernel Reboots
52.160.101.11 00:0d:3a:5b:a0:7c 5.0.0-1020-azure 10
137.135.51.101 00:0d:3a:31:20:fc 5.0.0-1020-azure 500
137.135.50.133 00:0d:3a:31:27:0f 5.0.0-1020-azure 396 [hang]
137.135.51.198 00:0d:3a:31:28:d7 5.0.0-1020-azure 500
137.135.49.89 00:0d:3a:31:22:c1 5.0.0-1020-azure 500
137.135.48.14 00:0d:3a:33:05:7d 5.0.0-1020-azure 500
104.40.5.23 00:0d:3a:32:e7:27 5.0.0-1020-azure 228 [hang]
13.93.223.213 00:0d:3a:32:e8:59 5.0.0-1020-azure 500
104.40.0.151 00:0d:3a:31:32:09 5.0.0-1020-azure 500
40.118.128.130 00:0d:3a:32:f5:71 5.0.0-1020-azure 500
23.101.200.119 00:0d:3a:36:c5:94 5.0.0-1020-azure 500
104.40.8.52 00:0d:3a:33:07:6e 5.0.0-1020-azure 500
104.40.19.222 00:0d:3a:33:01:0d 5.0.0-1020-azure 500
104.42.135.72 00:0d:3a:3b:e9:15 5.0.0-1020-azure 500
104.40.22.205 00:0d:3a:33:0d:d8 5.0.0-1020-azure 500
104.40.7.22 00:0d:3a:37:85:ff 5.0.0-1020-azure 500
13.88.17.94 00:0d:3a:5a:54:c6 5.0.0-1020-azure 500
104.40.8.196 00:0d:3a:59:56:f3 5.0.0-1020-azure 500
13.88.21.125 00:0d:3a:5a:50:00 5.0.0-1020-azure 500
13.88.23.139 00:0d:3a:5a:55:c3 5.0.0-1020-azure 500
23.99.81.188 00:0d:3a:5a:52:0f 5.0.0-1020-azure 500
13.88.20.132 00:0d:3a:5a:55:f1 5.0.0-1020-azure 500
13.88.20.126 00:0d:3a:5a:58:65 5.0.0-1020-azure 500
13.88.20.237 00:0d:3a:5a:55:42 5.0.0-1020-azure 500
13.88.17.35 00:0d:3a:5a:57:5f 5.0.0-1020-azure 500
13.91.54.225 00:0d:3a:5a:57:5a 5.0.0-1020-azure 500
13.88.21.57 00:0d:3a:5a:52:ce 5.0.0-1020-azure 500
13.88.21.67 00:0d:3a:5a:5b:b7 5.0.0-1020-azure 500
13.88.18.46 00:0d:3a:5a:5d:02 5.0.0-1020-azure 229 [hang]
13.88.16.222 00:0d:3a:37:80:d1 5.0.0-1020-azure 500
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https://bugs.launchpad.net/bugs/1822118
Title:
Kernel Panic while rebooting cloud instance
Status in linux-azure package in Ubuntu:
Incomplete
Status in systemd package in Ubuntu:
New
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.
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