We have observed random crashes on multiple and different servers running centos 7. It starts with soft cpu lockup loops and ends up in halt with high load where reboot is the only option left.<br />
Following can aid of determining he cause of crashes.<br />
<br />
uname -r : 3.10.0-123.6.3.el7.x86_64<br />
<br />
[511018.003859] BUG: unable to handle kernel NULL pointer dereference <br />
at<br />
0000000000000018<br />
[511018.003912] IP: [<ffffffff812c9292>] __bitmap_weight+0x62/0x80<br />
<br />
These servers are running ceph osd daemons.<br />
Please let know if you additional information is required.
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