kern/50099: 7.0_RC2 crash

[rbixler%eb.com@localhost]

>Number:         50099
>Category:       kern
>Synopsis:       system crashes during filesystem activity
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Jul 29 13:35:00 +0000 2015
>Originator:     Roy Bixler
>Release:        NetBSD 7.0_RC2
>Environment:
	
	
System: NetBSD rbixler 7.0_RC2 NetBSD 7.0_RC2 (GENERIC) #0: Fri Jul 24 21:05:10 CDT 2015 rcb@rbixler:/usr/obj/sys/arch/amd64/compile/GENERIC amd64
Architecture: x86_64
Machine: amd64
Description:
The crash has occurred on a couple of occasions, both while X was running
and there was significant filesystem activity.  The first time was while
I was running 7.0_RC1.  The traceback is below:
Jul 23 15:38:57 rbixler /netbsd: uvm_fault(0xfffffe807cc055c8, 0x0, 1) -> e
Jul 23 15:38:57 rbixler /netbsd: fatal page fault in supervisor mode
Jul 23 15:38:57 rbixler /netbsd: trap type 6 code 0 rip ffffffff805cdbfd cs 8 rflags 10286 cr2 8 ilevel 0 rsp fffffe802e81ebd8
Jul 23 15:38:57 rbixler /netbsd: curlwp 0xfffffe806e8a52c0 pid 3917.1 lowest kstack 0xfffffe802e81c2c0
Jul 23 15:38:57 rbixler /netbsd: panic: trap
Jul 23 15:38:57 rbixler /netbsd: cpu0: Begin traceback...
Jul 23 15:38:57 rbixler /netbsd: vpanic() at netbsd:vpanic+0x13c
Jul 23 15:38:57 rbixler /netbsd: snprintf() at netbsd:snprintf
Jul 23 15:38:57 rbixler /netbsd: startlwp() at netbsd:startlwp
Jul 23 15:38:57 rbixler /netbsd: alltraps() at netbsd:alltraps+0x96
Jul 23 15:38:57 rbixler /netbsd: mutex_vector_enter() at netbsd:mutex_vector_enter+0x93
Jul 23 15:38:57 rbixler /netbsd: uvm_fault_internal() at netbsd:uvm_fault_internal+0x34a
Jul 23 15:38:57 rbixler /netbsd: trap() at netbsd:trap+0x322
Jul 23 15:38:57 rbixler /netbsd: --- trap (number 6) ---
Jul 23 15:38:57 rbixler /netbsd: 7f7ff74b2a4b:
Jul 23 15:38:57 rbixler /netbsd: cpu0: End traceback...
Jul 23 15:38:57 rbixler /netbsd: face 3
Jul 23 15:38:57 rbixler /netbsd: uhidev2: Logitech Logit0x0, 2) -> e
Jul 23 15:38:57 rbixler /netbsd: 
Jul 23 15:38:57 rbixler /netbsd: fatal page fault in supervisor mode
Jul 23 15:38:57 rbixler /netbsd: dumping to dev 0,1 (offset=4267193, size=515326):
Jul 23 15:38:57 rbixler /netbsd: hidev3 at uhub2 port 2 configuration 1 interface 0
Jul 23 15:38:57 rbixler /netbsd: uhidev3: Microsoft Microsoft Basic Optica10
Jul 23 15:38:57 rbixler /netbsd: dump v2.0, rev 1.10/1.04, addr 3, iclass 3/1
Jul 23 15:38:57 rbixler /netbsd: ums0 at uhidev3:ffffe80357f02c0

The second time was while running 7.0_RC2 and here is the traceback in
this case:

Jul 28 03:18:38 rbixler /netbsd: cpu3: Begin traceback...
Jul 28 03:18:38 rbixler /netbsd: vpanic() at netbsd:vpanic+0x13c
Jul 28 03:18:38 rbixler /netbsd: snprintf() at netbsd:snprintf
Jul 28 03:18:38 rbixler /netbsd: startlwp() at netbsd:startlwp
Jul 28 03:18:38 rbixler /netbsd: alltraps() at netbsd:alltraps+0x96
Jul 28 03:18:38 rbixler /netbsd: cleanvnode() at netbsd:cleanvnode+0x29
Jul 28 03:18:38 rbixler /netbsd: vdrain_thread() at netbsd:vdrain_thread+0x58
Jul 28 03:18:38 rbixler /netbsd: cpu3: End traceback...
Jul 28 03:18:38 rbixler /netbsd: 
Jul 28 03:18:38 rbixler /netbsd: dumping to dev 0,1 (offset=4267193, size=515326):

>How-To-Repeat:
	unknown
>Fix:
	unknown