Fatal Trap 12 in nfsd, frequent random reboots after Kernel crash, version 11.1

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May 17, 2018
Hi all,

I'm posting here now as we have run out of any ideas and searching FreeNAS and Google has not brought us to any conclusion on the matter.

Issue: Our FreeNAS server shows a random reboot issue since about 1 month now, cause is a Kernel crash with this message:

Fatal trap 12: page fault while in kernel mode
cpuid = 7; apic id = 15
fault virtual address = 0xbf1a
fault code = supervisor read data, page not present
instruction pointer = 0x20:0xffffffff80f3921f
stack pointer = 0x28:0xfffffe183e267fe0
frame pointer = 0x28:0xfffffe183e267fe0
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 3873 (nfsd: service)

This happens anwhere from 3 times a week to 2 or 3 times a day. Record crash time was 5 minutes after reboot. Message is always the same, addresses differ bit it's always nfsd.
Versions we have tried is latest 11.1-U4, also a rollback to 11.1 RELEASE did not help.
We also changed the whole server already with an almost identical model (slightly different CPUs), but to no avail, the problem persists.

Here is the hardware we're using:

HP ProLiant DL360 Generation 7
FreeNAS OS is installed on an HP RAID mirror of 2 72GB SAS 10K disks
16 CPU Cores (24 cores in the other server we have replaced as a trial)
the ZFS storage disks are connected via a LSI SAS controller to a HP MSA60 shelf with 12 original HP 2TB disks, configured into 6 mirrors in freenas, the LSI controller is a HBA from your comptible HW section, no Hardware RAID controller involved! (for the concrete model I would need to dig)
Network connectivity is via a lagg interface using 2 gigabit ethernet links

The setup has not shown such issues before and it seems to have started out of the blue, but we cannot say 100% if it was linked to an update from 11.1 to 11.1-U1 or something.
Please find attached the last crash log from /data/crash from today

Thanks very much for any help, if you need more info just tell me.


  • config.txt
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  • ddb.txt
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  • msgbuf.txt
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  • version.txt
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Please create a report at bugs.freenas.org and post the issue number here.
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