[Bug 235783] Repeated ZFS-related kernel panic

Sat Mar 16 12:21:16 UTC 2019

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235783

--- Comment #1 from Jurij Kovacic <jurij.kovacic at ocpea.com> ---
Hello,

After approximately 1 month, the server (FreeBSD 11.2-RELEASE-p9 #0 r344062)
has crashed again. 

It seems to me, the reason for the crash is most likely the same as the last
time:

Fatal trap 9: general protection fault while in kernel mode
cpuid = 2; apic id = 02
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 = 2
KDB: stack backtrace:
#0 0xffffffff80b3d5a7 at kdb_backtrace+0x67
#1 0xffffffff80af6b47 at vpanic+0x177
#2 0xffffffff80af69c3 at panic+0x43
#3 0xffffffff80f77fdf at trap_fatal+0x35f
#4 0xffffffff80f7759e at trap+0x5e
#5 0xffffffff80f580bc at calltrap+0x8
#6 0xffffffff8229c049 at dbuf_evict_one+0xe9
#7 0xffffffff82297a15 at dbuf_evict_thread+0x1a5
#8 0xffffffff80aba0c3 at fork_exit+0x83
#9 0xffffffff80f58fee at fork_trampoline+0xe
Uptime: 31d1h57m16s
Uptime: 31d1h57m16s
Dumping 2771 out of 12248 MB:..1%..11%..21%..31%..41%..51%..61%..71%..81%..91%

Reading symbols from /boot/kernel/zfs.ko...Reading symbols from
/usr/lib/debug//boot/kernel/zfs.ko.debug...done.
done.
Loaded symbols for /boot/kernel/zfs.ko
Reading symbols from /boot/kernel/opensolaris.ko...Reading symbols from
/usr/lib/debug//boot/kernel/opensolaris.ko.debug...done.
done.
Loaded symbols for /boot/kernel/opensolaris.ko
Reading symbols from /boot/kernel/ums.ko...Reading symbols from
/usr/lib/debug//boot/kernel/ums.ko.debug...done.
done.
Loaded symbols for /boot/kernel/ums.ko
Reading symbols from /boot/kernel/pflog.ko...Reading symbols from
/usr/lib/debug//boot/kernel/pflog.ko.debug...done.
done.
Loaded symbols for /boot/kernel/pflog.ko
Reading symbols from /boot/kernel/pf.ko...Reading symbols from
/usr/lib/debug//boot/kernel/pf.ko.debug...done.
done.
Loaded symbols for /boot/kernel/pf.ko
Reading symbols from /boot/kernel/nullfs.ko...Reading symbols from
/usr/lib/debug//boot/kernel/nullfs.ko.debug...done.
done.
Loaded symbols for /boot/kernel/nullfs.ko
Reading symbols from /boot/kernel/blank_saver.ko...Reading symbols from
/usr/lib/debug//boot/kernel/blank_saver.ko.debug...done.
done.
Loaded symbols for /boot/kernel/blank_saver.ko
Reading symbols from /boot/kernel/fdescfs.ko...Reading symbols from
/usr/lib/debug//boot/kernel/fdescfs.ko.debug...done.
done.
Loaded symbols for /boot/kernel/fdescfs.ko
Reading symbols from /boot/kernel/smbfs.ko...Reading symbols from
/usr/lib/debug//boot/kernel/smbfs.ko.debug...done.
done.
Loaded symbols for /boot/kernel/smbfs.ko
Reading symbols from /boot/kernel/libiconv.ko...Reading symbols from
/usr/lib/debug//boot/kernel/libiconv.ko.debug...done.
done.
Loaded symbols for /boot/kernel/libiconv.ko
Reading symbols from /boot/kernel/libmchain.ko...Reading symbols from
/usr/lib/debug//boot/kernel/libmchain.ko.debug...done.
done.
Loaded symbols for /boot/kernel/libmchain.ko
Reading symbols from /boot/kernel/geom_mirror.ko...Reading symbols from
/usr/lib/debug//boot/kernel/geom_mirror.ko.debug...done.
done.
Loaded symbols for /boot/kernel/geom_mirror.ko
#0  doadump (textdump=<value optimized out>) at pcpu.h:229
229     pcpu.h: No such file or directory.
        in pcpu.h
(kgdb) #0  doadump (textdump=<value optimized out>) at pcpu.h:229
#1  0xffffffff80af675b in kern_reboot (howto=260)
    at /usr/src/sys/kern/kern_shutdown.c:383
#2  0xffffffff80af6b81 in vpanic (fmt=<value optimized out>,
    ap=<value optimized out>) at /usr/src/sys/kern/kern_shutdown.c:776
#3  0xffffffff80af69c3 in panic (fmt=<value optimized out>)
    at /usr/src/sys/kern/kern_shutdown.c:707
#4  0xffffffff80f77fdf in trap_fatal (frame=0xfffffe0352893a10, eva=0)
    at /usr/src/sys/amd64/amd64/trap.c:875
#5  0xffffffff80f7759e in trap (frame=0xfffffe0352893a10) at pcpu.h:229
#6  0xffffffff80f580bc in calltrap ()
    at /usr/src/sys/amd64/amd64/exception.S:231
#7  0xffffffff82299013 in dbuf_destroy (db=0xfffff8028de9cae0) at atomic.h:79
#8  0xffffffff8229c049 in dbuf_evict_one ()
    at /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c:487
#9  0xffffffff82297a15 in dbuf_evict_thread (unused=<value optimized out>)
    at /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c:525
#10 0xffffffff80aba0c3 in fork_exit (
    callout=0xffffffff82297870 <dbuf_evict_thread>, arg=0x0,
    frame=0xfffffe0352893c00) at /usr/src/sys/kern/kern_fork.c:1054
#11 0xffffffff80f58fee in fork_trampoline ()
    at /usr/src/sys/amd64/amd64/exception.S:959
#12 0x0000000000000000 in ?? ()
Current language:  auto; currently minimal
(kgdb)

The "crashinfo" txt file is available at thie URL:
http://www.ocpea.com/dump/core-5.txt

original core dump files are also available if needed.

Can someone, please, take a look at this? I will be more than happy to help
with debugging, supplying additional info etc if needed.

Kind regards,
Jurij

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