[Bug 194525] New: Restart Apache Causes page fault and kernel dump

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194525

            Bug ID: 194525
           Summary: Restart Apache Causes page fault and kernel dump
           Product: Base System
           Version: 10.1-RC2
          Hardware: amd64
                OS: Any
            Status: Needs Triage
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: pete at nomadlogic.org

On a 10.1-RC2 system where I run apache24 I seem to be reliably able to cause a
kernel panic and system crash while restating apache24.  

I run mod_wsgi on my apache instance for serving graphite webUI.  I have not
been able to detect any hardware defects on this system at this time.

Here is the output from /var/crash/panicmail.0.  I can make all other related
cores etc. avail upon request:

> sudo cat panicmail.0
Dump header from device /dev/da0p3
  Architecture: amd64
  Architecture Version: 2
  Dump Length: 3512709120B (3349 MB)
  Blocksize: 512
  Dumptime: Tue Oct 21 20:47:57 2014
  Hostname: pop.rubicorp.com
  Magic: FreeBSD Kernel Dump
  Version String: FreeBSD 10.1-RC2 #0 r272876: Fri Oct 10 01:12:21 UTC 2014
    root at releng1.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC
  Panic String: page fault
  Dump Parity: 3316977061
  Bounds: 0
  Dump Status: good

Backtrace:
Reading symbols from /boot/kernel/zfs.ko.symbols...done.
Loaded symbols for /boot/kernel/zfs.ko.symbols
Reading symbols from /boot/kernel/opensolaris.ko.symbols...done.
Loaded symbols for /boot/kernel/opensolaris.ko.symbols
Reading symbols from /boot/kernel/linux.ko.symbols...done.
Loaded symbols for /boot/kernel/linux.ko.symbols
Reading symbols from /boot/kernel/accf_data.ko.symbols...done.
Loaded symbols for /boot/kernel/accf_data.ko.symbols
Reading symbols from /boot/kernel/accf_http.ko.symbols...done.
Loaded symbols for /boot/kernel/accf_http.ko.symbols
Reading symbols from /boot/modules/nvidia.ko...done.
Loaded symbols for /boot/modules/nvidia.ko
Reading symbols from /boot/modules/vboxdrv.ko...done.
Loaded symbols for /boot/modules/vboxdrv.ko
Reading symbols from /boot/kernel/sem.ko.symbols...done.
Loaded symbols for /boot/kernel/sem.ko.symbols
Reading symbols from /boot/kernel/ums.ko.symbols...done.
Loaded symbols for /boot/kernel/ums.ko.symbols
Reading symbols from /boot/kernel/pflog.ko.symbols...done.
Loaded symbols for /boot/kernel/pflog.ko.symbols
Reading symbols from /boot/kernel/pf.ko.symbols...done.
Loaded symbols for /boot/kernel/pf.ko.symbols
Reading symbols from /boot/modules/vboxnetflt.ko...done.
Loaded symbols for /boot/modules/vboxnetflt.ko
Reading symbols from /boot/kernel/netgraph.ko.symbols...done.
Loaded symbols for /boot/kernel/netgraph.ko.symbols
Reading symbols from /boot/kernel/ng_ether.ko.symbols...done.
Loaded symbols for /boot/kernel/ng_ether.ko.symbols
Reading symbols from /boot/modules/vboxnetadp.ko...done.
Loaded symbols for /boot/modules/vboxnetadp.ko
#0  doadump (textdump=<value optimized out>) at pcpu.h:219
    in pcpu.h
(kgdb) #0  doadump (textdump=<value optimized out>) at pcpu.h:219
#1  0xffffffff809264b2 in kern_reboot (howto=260)
    at /usr/src/sys/kern/kern_shutdown.c:452
#2  0xffffffff80926874 in panic (fmt=<value optimized out>)
    at /usr/src/sys/kern/kern_shutdown.c:759
#3  0xffffffff80d2304f in trap_fatal (frame=<value optimized out>,
    eva=<value optimized out>) at /usr/src/sys/amd64/amd64/trap.c:865
#4  0xffffffff80d23368 in trap_pfault (frame=0xfffffe07e215d6d0,
    usermode=<value optimized out>) at /usr/src/sys/amd64/amd64/trap.c:676
#5  0xffffffff80d229ca in trap (frame=0xfffffe07e215d6d0)
    at /usr/src/sys/amd64/amd64/trap.c:440
#6  0xffffffff80d08882 in calltrap ()
    at /usr/src/sys/amd64/amd64/exception.S:232
#7  0xffffffff8090cb7a in lf_advlockasync (ap=0xfffffe07e215d860,
    statep=0xfffff80035c15ab8, size=<value optimized out>)
    at /usr/src/sys/kern/kern_lockf.c:745
#8  0xffffffff8090d345 in lf_advlock (ap=<value optimized out>, statep=0x0,
    size=0) at /usr/src/sys/kern/kern_lockf.c:771
#9  0xffffffff809b7549 in vop_stdadvlock (ap=0xfffffe07e215da18)
    at /usr/src/sys/kern/vfs_default.c:414
#10 0xffffffff80e42387 in VOP_ADVLOCK_APV (vop=<value optimized out>,
    a=<value optimized out>) at vnode_if.c:2531
#11 0xffffffff808e30a9 in kern_fcntl (td=<value optimized out>,
    fd=<value optimized out>, cmd=<value optimized out>,
    arg=<value optimized out>) at vnode_if.h:1041
#12 0xffffffff808e24ec in kern_fcntl_freebsd (td=0xfffff806ce129490, fd=9,
    cmd=<value optimized out>, arg=34383977672)
    at /usr/src/sys/kern/kern_descrip.c:458
#13 0xffffffff80d23981 in amd64_syscall (td=0xfffff806ce129490, traced=0)
    at subr_syscall.c:134
#14 0xffffffff80d08b6b in Xfast_syscall ()
    at /usr/src/sys/amd64/amd64/exception.S:391
#15 0x0000000801c8e33a in ?? ()
Current language:  auto; currently minimal
(kgdb)
>

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