linux:ubuntu
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linux:ubuntu [2014/04/23 15:52] – steve | linux:ubuntu [2014/04/23 16:40] – steve | ||
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===== Trusty 14.04 Server ===== | ===== Trusty 14.04 Server ===== | ||
- | Critical issue found when using Xen 4.4. A kernel BUG is triggered. | + | <wrap em>Critical issue</ |
+ | < | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.718919] BUG: Bad page map in process vsftpd | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.720343] page: | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.721893] page flags: 0x1ffff0000000014(referenced|dirty) | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.723022] addr: | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.724994] CPU: 2 PID: 1469 Comm: vsftpd Not tainted 3.13.0-24-generic #46-Ubuntu | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.724996] Hardware name: LENOVO Lenovo H405/ | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.724998] | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.725002] | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.725004] | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.725007] Call Trace: | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.725015] | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.725019] | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.725022] | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.725025] | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.725027] | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.725030] | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.725033] | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.725035] | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.725038] | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.725042] | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.725044] | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.725046] | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.725049] | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.725050] Disabling lock debugging due to kernel taint | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.725526] BUG: Bad rss-counter state mm: | ||
+ | Apr 23 09:45:02 callisto kernel: [ 186.726785] BUG: Bad rss-counter state mm: | ||
+ | [... repeats over and over ... ] | ||
+ | </ | ||
+ | This is easy to trigger. | ||
+ | |||
+ | Install 14.04 server and choose just the OpenSSH server. | ||
+ | apt-get install xen-system-amd64 | ||
+ | Reboot | ||
+ | apt-get install vsftpd | ||
+ | |||
+ | As soon as vsftpd tries to start, the bug is triggered. | ||
+ | |||
+ | <wrap center round info 60%> | ||
+ | |||
+ | wget http:// | ||
+ | dpkg -i linux-image-3.15.0-031500rc2-generic_3.15.0-031500rc2.201404201435_amd64.deb | ||
+ | # Reboot server. |
linux/ubuntu.txt · Last modified: 2014/05/27 17:55 by steve