kern/52065: page fault in kevent

[martin%NetBSD.org@localhost]

>Number:         52065
>Category:       kern
>Synopsis:       page fault in kevent
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Mar 12 07:55:00 +0000 2017
>Originator:     Martin Husemann
>Release:        NetBSD 7.99.65
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD martins.aprisoft.de 7.99.65 NetBSD 7.99.65 (GENERIC) #122: Wed Mar 8 16:36:35 CET 2017 martin%martins.aprisoft.de@localhost:/ssd/src/sys/arch/amd64/compile/GENERIC amd64
Architecture: x86_64
Machine: amd64
>Description:

Doing a pkg_chk with pkgsrc on an NFS mount caused this:

uvm_fault(0xfffffe841f792750, 0x0, 2) -> e
fatal page fault in supervisor mode
trap type 6 code 2 rip ffffffff808d0f10 cs 8 rflags 10246 cr2 0 ilevel 8 rsp fffffe811df82bf0
curlwp 0xfffffe84201df360 pid 670.5 lowest kstack 0xfffffe811df802c0
db{3}> bt
kevent1() at netbsd:kevent1+0x4ce
sys___kevent50() at netbsd:sys___kevent50+0x33
syscall() at netbsd:syscall+0x1bc
--- syscall (number 435) ---
db{3}>mach cpu 0
using CPU 0
db{3}> bt
x86_stihlt() at netbsd:x86_stihlt+0x6
acpicpu_cstate_idle_enter() at netbsd:acpicpu_cstate_idle_enter+0xdb
acpicpu_cstate_idle() at netbsd:acpicpu_cstate_idle+0xdb
idle_loop() at netbsd:idle_loop+0xf8
db{3}> mach cpu 1
using CPU 1
db{3}> bt
x86_pause() at netbsd:x86_pause+0x2
knote_activate() at netbsd:knote_activate+0x21
knote() at netbsd:knote+0x3f
selnotify() at netbsd:selnotify+0x1f
sowakeup() at netbsd:sowakeup+0x3d
unp_send() at netbsd:unp_send+0x539
sosend() at netbsd:sosend+0x741
soo_write() at netbsd:soo_write+0x2c
dofilewrite() at netbsd:dofilewrite+0x97
sys_write() at netbsd:sys_write+0x5f
syscall() at netbsd:syscall+0x1bc
--- syscall (number 4) ---
7243fc03dcda:
db{3}> mach cpu 2
using CPU 2
db{3}> bt
x86_stihlt() at netbsd:x86_stihlt+0x6
acpicpu_cstate_idle_enter() at netbsd:acpicpu_cstate_idle_enter+0xdb
acpicpu_cstate_idle() at netbsd:acpicpu_cstate_idle+0xdb
idle_loop() at netbsd:idle_loop+0xf8
md_root_setconf() at netbsd:md_root_setconf
db{3}> mach cpu 4
using CPU 4
db{3}> ba t
x86_stihlt() at netbsd:x86_stihlt+0x6
acpicpu_cstate_idle_enter() at netbsd:acpicpu_cstate_idle_enter+0xdb
acpicpu_cstate_idle() at netbsd:acpicpu_cstate_idle+0xdb
idle_loop() at netbsd:idle_loop+0xf8
Bad frame pointer: 0xfffffe811d317580
db{3}> mach cpu 5
using CPU 5
db{3}> bt
x86_stihlt() at netbsd:x86_stihlt+0x6
acpicpu_cstate_idle_enter() at netbsd:acpicpu_cstate_idle_enter+0xdb
acpicpu_cstate_idle() at netbsd:acpicpu_cstate_idle+0xdb
idle_loop() at netbsd:idle_loop+0xf8
Bad frame pointer: 0xfffffe811d3045c0

Unfortunately could not get a crash dump.


>How-To-Repeat:
n/a

>Fix:
n/a