Kernel panic on 11.2-RELEASE-p7

Jurij Kovačič jurij.kovacic at
Tue Dec 25 06:57:25 UTC 2018

Dear list,

I hope I am posting this to the correct list - if not, I apologize (and
please advise where to post this instead).

Today I experienced a kernel panic on a (physical) server, running Freebsd
11.2-RELEASE-p7 with GENERIC kernel, ZFS root:

Fatal trap 9: general protection fault while in kernel mode
cpuid = 0; apic id = 00
instruction pointer    = 0x20:0xffffffff82299013
stack pointer            = 0x28:0xfffffe0352893ad0
frame pointer            = 0x28:0xfffffe0352893b10
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        = 9 (dbuf_evict_thread)
trap number        = 9
panic: general protection fault
cpuid = 0
KDB: stack backtrace:
#0 0xffffffff80b3d577 at kdb_backtrace+0x67
#1 0xffffffff80af6b17 at vpanic+0x177
#2 0xffffffff80af6993 at panic+0x43
#3 0xffffffff80f77fdf at trap_fatal+0x35f
#4 0xffffffff80f7759e at trap+0x5e
#5 0xffffffff80f5808c at calltrap+0x8
#6 0xffffffff8229c049 at dbuf_evict_one+0xe9
#7 0xffffffff82297a15 at dbuf_evict_thread+0x1a5
#8 0xffffffff80aba093 at fork_exit+0x83
#9 0xffffffff80f58fae at fork_trampoline+0xe

I have used "crashinfo" utility to generate the text file which is
available at this URL:

At the time of the crash, the server was probably under more intensive I/O
load (scheduled backup with rsync).

This is a production server, so naturally, all advice is deeply
appreciated. :)

Kind regards,

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