Re: crash: umount_nfs: Current

From: Rick Macklem <rmacklem_at_uoguelph.ca>
Date: Thu, 16 Mar 2017 22:51:08 +0000
I believe the cause of this crash was fixed by a recent commit
to head r313735 (which was MFC'd to stable/11 and stable/10).

rick
________________________________________
From: owner-freebsd-current_at_freebsd.org <owner-freebsd-current_at_freebsd.org> on behalf of Larry Rosenman <ler_at_lerctr.org>
Sent: Wednesday, March 15, 2017 10:44:33 PM
To: freebsd-fs_at_freebsd.org
Cc: freebsd-current_at_FreeBSD.org
Subject: crash: umount_nfs: Current

Recent current, playing with new FreeNAS Corral, client is FreeBSD -CURRENT.

Lovely crash:

borg.lerctr.org dumped core - see /var/crash/vmcore.1

Wed Mar 15 21:38:53 CDT 2017

FreeBSD borg.lerctr.org 12.0-CURRENT FreeBSD 12.0-CURRENT #11 r315289: Tue Mar 14 20:55:36 CDT 2017     root_at_borg.lerctr.org:/usr/obj/usr/src/sys/VT-LER  amd64

panic: general protection fault

GNU gdb (GDB) 7.12.1 [GDB v7.12.1 for FreeBSD]
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Reading symbols from /boot/kernel/kernel...Reading symbols from /usr/lib/debug//boot/kernel/kernel.debug...done.
done.

Unread portion of the kernel message buffer:


Fatal trap 9: general protection fault while in kernel mode
cpuid = 1; apic id = 21
instruction pointer     = 0x20:0xffffffff80a327ae
stack pointer           = 0x28:0xfffffe535ebb2800
frame pointer           = 0x28:0xfffffe535ebb2830
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         = 3172 (umount)
trap number             = 9
panic: general protection fault
cpuid = 1
time = 1489631515
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe535ebb2440
vpanic() at vpanic+0x19c/frame 0xfffffe535ebb24c0
panic() at panic+0x43/frame 0xfffffe535ebb2520
trap_fatal() at trap_fatal+0x322/frame 0xfffffe535ebb2570
trap() at trap+0x5e/frame 0xfffffe535ebb2730
calltrap() at calltrap+0x8/frame 0xfffffe535ebb2730
--- trap 0x9, rip = 0xffffffff80a327ae, rsp = 0xfffffe535ebb2800, rbp = 0xfffffe535ebb2830 ---
__mtx_lock_flags() at __mtx_lock_flags+0x3e/frame 0xfffffe535ebb2830
xprt_unregister() at xprt_unregister+0x28/frame 0xfffffe535ebb2850
clnt_reconnect_destroy() at clnt_reconnect_destroy+0x38/frame 0xfffffe535ebb2880
nfs_unmount() at nfs_unmount+0x182/frame 0xfffffe535ebb28d0
dounmount() at dounmount+0x5c1/frame 0xfffffe535ebb2950
sys_unmount() at sys_unmount+0x30f/frame 0xfffffe535ebb2a70
amd64_syscall() at amd64_syscall+0x55a/frame 0xfffffe535ebb2bf0
Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe535ebb2bf0
--- syscall (22, FreeBSD ELF64, sys_unmount), rip = 0x800872b9a, rsp = 0x7fffffffde88, rbp = 0x7fffffffe3c0 ---
Uptime: 2h43m8s
Dumping 5744 out of 131005 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.
Reading symbols from /boot/kernel/opensolaris.ko...Reading symbols from /usr/lib/debug//boot/kernel/opensolaris.ko.debug...done.
done.
Reading symbols from /boot/kernel/linux.ko...Reading symbols from /usr/lib/debug//boot/kernel/linux.ko.debug...done.
done.
Reading symbols from /boot/kernel/linux_common.ko...Reading symbols from /usr/lib/debug//boot/kernel/linux_common.ko.debug...done.
done.
Reading symbols from /boot/kernel/if_lagg.ko...Reading symbols from /usr/lib/debug//boot/kernel/if_lagg.ko.debug...done.
done.
Reading symbols from /boot/kernel/coretemp.ko...Reading symbols from /usr/lib/debug//boot/kernel/coretemp.ko.debug...done.
done.
Reading symbols from /boot/kernel/aesni.ko...Reading symbols from /usr/lib/debug//boot/kernel/aesni.ko.debug...done.
done.
Reading symbols from /boot/kernel/filemon.ko...Reading symbols from /usr/lib/debug//boot/kernel/filemon.ko.debug...done.
done.
Reading symbols from /boot/kernel/fuse.ko...Reading symbols from /usr/lib/debug//boot/kernel/fuse.ko.debug...done.
done.
Reading symbols from /boot/kernel/ichsmb.ko...Reading symbols from /usr/lib/debug//boot/kernel/ichsmb.ko.debug...done.
done.
Reading symbols from /boot/kernel/smbus.ko...Reading symbols from /usr/lib/debug//boot/kernel/smbus.ko.debug...done.
done.
Reading symbols from /boot/kernel/ichwd.ko...Reading symbols from /usr/lib/debug//boot/kernel/ichwd.ko.debug...done.
done.
Reading symbols from /boot/kernel/cpuctl.ko...Reading symbols from /usr/lib/debug//boot/kernel/cpuctl.ko.debug...done.
done.
Reading symbols from /boot/kernel/cryptodev.ko...Reading symbols from /usr/lib/debug//boot/kernel/cryptodev.ko.debug...done.
done.
Reading symbols from /boot/kernel/dtraceall.ko...Reading symbols from /usr/lib/debug//boot/kernel/dtraceall.ko.debug...done.
done.
Reading symbols from /boot/kernel/profile.ko...Reading symbols from /usr/lib/debug//boot/kernel/profile.ko.debug...done.
done.
Reading symbols from /boot/kernel/dtrace.ko...Reading symbols from /usr/lib/debug//boot/kernel/dtrace.ko.debug...done.
done.
Reading symbols from /boot/kernel/systrace_freebsd32.ko...Reading symbols from /usr/lib/debug//boot/kernel/systrace_freebsd32.ko.debug...done.
done.
Reading symbols from /boot/kernel/systrace.ko...Reading symbols from /usr/lib/debug//boot/kernel/systrace.ko.debug...done.
done.
Reading symbols from /boot/kernel/sdt.ko...Reading symbols from /usr/lib/debug//boot/kernel/sdt.ko.debug...done.
done.
Reading symbols from /boot/kernel/fasttrap.ko...Reading symbols from /usr/lib/debug//boot/kernel/fasttrap.ko.debug...done.
done.
Reading symbols from /boot/kernel/fbt.ko...Reading symbols from /usr/lib/debug//boot/kernel/fbt.ko.debug...done.
done.
Reading symbols from /boot/kernel/dtnfscl.ko...Reading symbols from /usr/lib/debug//boot/kernel/dtnfscl.ko.debug...done.
done.
Reading symbols from /boot/kernel/dtmalloc.ko...Reading symbols from /usr/lib/debug//boot/kernel/dtmalloc.ko.debug...done.
done.
Reading symbols from /boot/modules/vboxdrv.ko...(no debugging symbols found)...done.
Reading symbols from /boot/kernel/ipmi.ko...Reading symbols from /usr/lib/debug//boot/kernel/ipmi.ko.debug...done.
done.
Reading symbols from /boot/kernel/ipmi_linux.ko...Reading symbols from /usr/lib/debug//boot/kernel/ipmi_linux.ko.debug...done.
done.
Reading symbols from /boot/kernel/hwpmc.ko...Reading symbols from /usr/lib/debug//boot/kernel/hwpmc.ko.debug...done.
done.
Reading symbols from /boot/kernel/mfip.ko...Reading symbols from /usr/lib/debug//boot/kernel/mfip.ko.debug...done.
done.
Reading symbols from /boot/kernel/ums.ko...Reading symbols from /usr/lib/debug//boot/kernel/ums.ko.debug...done.
done.
Reading symbols from /boot/modules/vboxnetflt.ko...(no debugging symbols found)...done.
Reading symbols from /boot/kernel/netgraph.ko...Reading symbols from /usr/lib/debug//boot/kernel/netgraph.ko.debug...done.
done.
Reading symbols from /boot/kernel/ng_ether.ko...Reading symbols from /usr/lib/debug//boot/kernel/ng_ether.ko.debug...done.
done.
Reading symbols from /boot/modules/vboxnetadp.ko...(no debugging symbols found)...done.
Reading symbols from /boot/kernel/linux64.ko...Reading symbols from /usr/lib/debug//boot/kernel/linux64.ko.debug...done.
done.
Reading symbols from /boot/kernel/linprocfs.ko...Reading symbols from /usr/lib/debug//boot/kernel/linprocfs.ko.debug...done.
done.
Reading symbols from /boot/kernel/tmpfs.ko...Reading symbols from /usr/lib/debug//boot/kernel/tmpfs.ko.debug...done.
done.
__curthread () at ./machine/pcpu.h:232
232             __asm("movq %%gs:%1,%0" : "=r" (td)
(kgdb) #0  __curthread () at ./machine/pcpu.h:232
#1  doadump (textdump=1) at /usr/src/sys/kern/kern_shutdown.c:318
#2  0xffffffff80a52c15 in kern_reboot (howto=260)
    at /usr/src/sys/kern/kern_shutdown.c:386
#3  0xffffffff80a53206 in vpanic (fmt=<optimized out>, ap=0xfffffe535ebb2500)
    at /usr/src/sys/kern/kern_shutdown.c:779
#4  0xffffffff80a53253 in panic (fmt=<unavailable>)
    at /usr/src/sys/kern/kern_shutdown.c:710
#5  0xffffffff80ecd5c2 in trap_fatal (frame=0xfffffe535ebb2740, eva=0)
    at /usr/src/sys/amd64/amd64/trap.c:801
#6  0xffffffff80eccb8e in trap (frame=0xfffffe535ebb2740)
    at /usr/src/sys/amd64/amd64/trap.c:197
#7  <signal handler called>
#8  __mtx_lock_flags (c=0xdeadc0dedeadc0f6, opts=0,
    file=0xffffffff8147e721 "/usr/src/sys/rpc/svc.c", line=380)
    at /usr/src/sys/kern/kern_mutex.c:239
#9  0xffffffff80cc14b8 in xprt_unregister (xprt=0xfffff8022e0fce00)
    at /usr/src/sys/rpc/svc.c:380
#10 0xffffffff80cbc058 in clnt_reconnect_destroy (cl=0xfffff80146fa3900)
    at /usr/src/sys/rpc/clnt_rc.c:500
#11 0xffffffff80969972 in nfs_unmount (mp=<optimized out>,
    mntflags=<optimized out>) at /usr/src/sys/fs/nfsclient/nfs_clvfsops.c:1704
#12 0xffffffff80b0b761 in dounmount (mp=0xdeadc0dedeadc0f6, flags=134217728,
    td=0xfffff8018f2eb000) at /usr/src/sys/kern/vfs_mount.c:1388
#13 0xffffffff80b0b11f in sys_unmount (td=0xfffff8018f2eb000,
    uap=0xfffffe535ebb2b70) at /usr/src/sys/kern/vfs_mount.c:1215
#14 0xffffffff80ecdfea in syscallenter (td=0xfffff8018f2eb000,
    sa=<optimized out>)
    at /usr/src/sys/amd64/amd64/../../kern/subr_syscall.c:135
#15 amd64_syscall (td=0xfffff8018f2eb000, traced=0)
    at /usr/src/sys/amd64/amd64/trap.c:902
#16 <signal handler called>
Can't read data for section '.eh_frame' in file '/'
(kgdb)

vmcore / source IS available.

--
Larry Rosenman                     http://www.lerctr.org/~ler
Phone: +1 214-642-9640                 E-Mail: ler_at_lerctr.org
US Mail: 17716 Limpia Crk, Round Rock, TX 78664-7281
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Received on Thu Mar 16 2017 - 21:51:11 UTC

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