Interesting - I reported earlier exactly the same sequence -
...
pmap_enter_ma() at pmap_enter_ma+0xe2a
pmap_enter_default() at pmap_enter_default+0x1d
udv_fault() at udv_fault+0x151
uvm_fault_internal() at uvm_fault_internal+0x6d4
trap() at trap+0x3f0
--- trap (number 6) ---
...

when starting Xorg under VirtualBox (it works on real hardware).

Chavdar

On Wed, 22 Nov 2017 at 02:10 Kengo NAKAHARA <k-nakah...@iij.ad.jp> wrote:

> Hi,
>
> I met a panic when I do "acpidump -dt" on -current(Nov 22). The specific
> version is the following commit.
>     https://mail-index.netbsd.org/source-changes/2017/11/21/msg089839.html
> # It includes chs@n.o's fix of pmap_enter_ma() and
> uvm_fault_upper_enter().
>
> Here is the panic message and backtrace.
> ====================
> panic: prevented access to 0x10 (SMAP)
> fatal breakpoint trap in supervisor mode
> trap type 1 code 0 rip 0xffffffff8021d2d5 cs 0x8 rflags 0x246 cr2 0x10
> ilevel 0 rsp 0xffffe40110c4b7e0
> curlwp 0xffffe4027b7cd220 pid 866.1 lowest kstack 0xffffe40110c482c0
> Stopped in pid 866.1 (acpidump) at      netbsd:breakpoint+0x5:  leave
> db{6}> bt
> breakpoint() at netbsd:breakpoint+0x5
> vpanic() at netbsd:vpanic+0x140
> panic() at netbsd:panic+0x3c
> trap() at netbsd:trap+0xbf0
> --- trap (number 6) ---
> pmap_enter_ma() at netbsd:pmap_enter_ma+0xe2a
> pmap_enter_default() at netbsd:pmap_enter_default+0x1d
> udv_fault() at netbsd:udv_fault+0x151
> uvm_fault_internal() at netbsd:uvm_fault_internal+0x6d4
> trap() at netbsd:trap+0x3f0
> --- trap (number 6) ---
> 1568033cf:
> ====================
>
> Here is dmesg.
>     http://netbsd.org/~knakahara/20171122-acpidump-panic-dmesg
>
> msaitoh@n.o met the same panic on other machine.
>
> Does anyone meet this issue?
>
>
> Thanks,
>
> --
> //////////////////////////////////////////////////////////////////////
> Internet Initiative Japan Inc.
>
> Device Engineering Section,
> IoT Platform Development Department,
> Network Division,
> Technology Unit
>
> Kengo NAKAHARA <k-nakah...@iij.ad.jp>
>

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