Date: Sun, 21 Oct 2012 20:51:02 GMT From: Helmut Schneider <jumper99@gmx.de> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/172942: Unmounting a smb mount when the server became unavailable causes kernel panic Message-ID: <201210212051.q9LKp2nR013791@red.freebsd.org> Resent-Message-ID: <201210212100.q9LL00L5058535@freefall.freebsd.org>
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>Number: 172942
>Category: kern
>Synopsis: Unmounting a smb mount when the server became unavailable causes kernel panic
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sun Oct 21 21:00:00 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator: Helmut Schneider
>Release:
>Organization:
>Environment:
FreeBSD BSDHelmut.charlieroot.de 9.0-RELEASE-p4 FreeBSD 9.0-RELEASE-p4 #16: Tue Aug 7 20:38:59 CEST 2012 root@BSDHelmut.charlieroot.de:/usr/obj/usr/src/sys/GENERIC-QUOTA-PF-ALTQ amd64
Host is a virtual machine (VMWare ESXi 5.0)
>Description:
I'm mounting a smb share of a Windows Server 2008R2 share using:
mount_smbfs ${OPTIONS} -N -I ${HOST} //${USER}@${NBTHOST}/${SHARE} $
{MNTPOINT}
OPTIONS are e.g. noexec,nosuid,noatime,rw
When the Windows Server becomes unavailable or even when I restart the server and I then unmount the smb share, the kernel panics.
[helmut@BSDHelmut /usr/obj/usr/src/sys/GENERIC-QUOTA-PF-ALTQ]$ sudo kgdb kernel.debug /var/crash/vmcore.0
GNU gdb 6.1.1 [FreeBSD]
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welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
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This GDB was configured as "amd64-marcel-freebsd"...
Unread portion of the kernel message buffer:
kernel trap 12 with interrupts disabled
Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address = 0x20
fault code = supervisor read data, page not present
instruction pointer = 0x20:0xffffffff808b41a8
stack pointer = 0x28:0xffffff807be52a60
frame pointer = 0x28:0xffffff807be52a90
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags = resume, IOPL = 0
current process = 1887 (smbiod1)
trap number = 12
panic: page fault
cpuid = 0
KDB: stack backtrace:
#0 0xffffffff808a57ae at kdb_backtrace+0x5e
#1 0xffffffff80870367 at panic+0x187
#2 0xffffffff80b56920 at trap_fatal+0x290
#3 0xffffffff80b56fd7 at trap+0x287
#4 0xffffffff80b415cf at calltrap+0x8
#5 0xffffffff80860400 at _mtx_unlock_sleep+0x50
#6 0xffffffff8163150c at smb_iod_invrq+0xbc
#7 0xffffffff81632621 at smb_iod_addrq+0x211
#8 0xffffffff8162efd9 at smb_rq_simple+0x39
#9 0xffffffff8162d70d at smb_smb_ssnclose+0xbd
#10 0xffffffff8163220d at smb_iod_thread+0x2fd
#11 0xffffffff80843edf at fork_exit+0x11f
#12 0xffffffff80b41afe at fork_trampoline+0xe
Uptime: 1h27m34s
Dumping 405 out of 2029 MB:..4%..12%..24%..32%..44%..52%..64%..72%..83%..91%Attempt to write outside dump device boundaries.
offset(4295016960), mediaoffset(2147566592), length(57344), mediasize(2147483648).
Dump map grown while dumping. Retrying...
Dumping 405 out of 2029 MB:
Reading symbols from /boot/kernel/geom_mirror.ko...Reading symbols from /boot/kernel/geom_mirror.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/geom_mirror.ko
Reading symbols from /boot/kernel/tmpfs.ko...Reading symbols from /boot/kernel/tmpfs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/tmpfs.ko
Reading symbols from /usr/local/lib/vmware-tools/modules/drivers/vmmemctl.ko...done.
Loaded symbols for /usr/local/lib/vmware-tools/modules/drivers/vmmemctl.ko
Reading symbols from /usr/local/lib/vmware-tools/modules/drivers/vmxnet.ko...done.
Loaded symbols for /usr/local/lib/vmware-tools/modules/drivers/vmxnet.ko
Reading symbols from /usr/local/lib/vmware-tools/modules/drivers/vmblock.ko...done.
Loaded symbols for /usr/local/lib/vmware-tools/modules/drivers/vmblock.ko
Reading symbols from /usr/local/lib/vmware-tools/modules/drivers/vmhgfs.ko...done.
Loaded symbols for /usr/local/lib/vmware-tools/modules/drivers/vmhgfs.ko
Reading symbols from /boot/kernel/smbfs.ko...Reading symbols from /boot/kernel/smbfs.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/smbfs.ko
Reading symbols from /boot/kernel/libiconv.ko...Reading symbols from /boot/kernel/libiconv.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/libiconv.ko
Reading symbols from /boot/kernel/libmchain.ko...Reading symbols from /boot/kernel/libmchain.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/libmchain.ko
Reading symbols from /boot/kernel/accf_http.ko...Reading symbols from /boot/kernel/accf_http.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/accf_http.ko
Reading symbols from /boot/kernel/accf_data.ko...Reading symbols from /boot/kernel/accf_data.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/accf_data.ko
#0 doadump (textdump=Variable "textdump" is not available.
) at pcpu.h:224
warning: Source file is more recent than executable.
224 __asm("movq %%gs:0,%0" : "=r" (td));
(kgdb) bt
#0 doadump (textdump=Variable "textdump" is not available.
) at pcpu.h:224
#1 0xffffffff8086fea5 in kern_reboot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:442
#2 0xffffffff80870351 in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:607
#3 0xffffffff80b56920 in trap_fatal (frame=0xc, eva=Variable "eva" is not available.
) at /usr/src/sys/amd64/amd64/trap.c:819
#4 0xffffffff80b56fd7 in trap (frame=0xffffff807be529b0) at /usr/src/sys/amd64/amd64/trap.c:322
#5 0xffffffff80b415cf in calltrap () at /usr/src/sys/amd64/amd64/exception.S:228
#6 0xffffffff808b41a8 in turnstile_broadcast (ts=0x0, queue=0)
at /usr/src/sys/kern/subr_turnstile.c:831
#7 0xffffffff80860400 in _mtx_unlock_sleep (m=0xfffffe0016b9c2f0, opts=Variable "opts" is not available.
)
at /usr/src/sys/kern/kern_mutex.c:675
#8 0xffffffff8163150c in smb_iod_invrq (iod=Variable "iod" is not available.
)
at /usr/src/sys/modules/smbfs/../../netsmb/smb_iod.c:91
#9 0xffffffff81632621 in smb_iod_addrq (rqp=0xfffffe0016b9c200)
at /usr/src/sys/modules/smbfs/../../netsmb/smb_iod.c:418
#10 0xffffffff8162efd9 in smb_rq_simple (rqp=0xfffffe0016b9c200)
at /usr/src/sys/modules/smbfs/../../netsmb/smb_rq.c:168
#11 0xffffffff8162d70d in smb_smb_ssnclose (vcp=Variable "vcp" is not available.
)
at /usr/src/sys/modules/smbfs/../../netsmb/smb_smb.c:434
#12 0xffffffff8163220d in smb_iod_thread (arg=Variable "arg" is not available.
)
at /usr/src/sys/modules/smbfs/../../netsmb/smb_iod.c:180
#13 0xffffffff80843edf in fork_exit (callout=0xffffffff81631f10 <smb_iod_thread>,
arg=0xfffffe0002997000, frame=0xffffff807be52c50) at /usr/src/sys/kern/kern_fork.c:995
#14 0xffffffff80b41afe in fork_trampoline () at /usr/src/sys/amd64/amd64/exception.S:602
#15 0x0000000000000000 in ?? ()
#16 0x0000000000000000 in ?? ()
#17 0x0000000000000001 in ?? ()
#18 0x0000000000000000 in ?? ()
#19 0x0000000000000000 in ?? ()
#20 0x0000000000000000 in ?? ()
#21 0x0000000000000000 in ?? ()
#22 0x0000000000000000 in ?? ()
#23 0x0000000000000000 in ?? ()
#24 0x0000000000000000 in ?? ()
#25 0x0000000000000000 in ?? ()
#26 0x0000000000000000 in ?? ()
#27 0x0000000000000000 in ?? ()
#28 0x0000000000000000 in ?? ()
#29 0x0000000000000000 in ?? ()
#30 0x0000000000000000 in ?? ()
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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