port-i386/54701: kernel panic with uvm_fault

[venture37%geeklan.co.uk@localhost]

>Number:         54701
>Category:       port-i386
>Synopsis:       kernel panic with uvm_fault
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-i386-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Nov 16 12:55:00 +0000 2019
>Originator:     Sevan Janiyan
>Release:        9.99.17
>Organization:
>Environment:
>Description:
generic kernel from Nov 14 and install kernel from Nov 16 both panic on boot with. Hardware here is an Alix 2c3.

[   1.0083253] uvm_fault(0xc14b5d00, 0, 1) -> 0xe
[   1.0083253] fatal page fault in supervisor mode
[   1.0083253] trap type 6 code 0 eip 0xc03571d0 cs 0x8 eflags 0x10246 cr2 0 ilevel 0x8 esp 0xc10b8163
[   1.0083253] curlwp 0xc13ba640 pid 0 lid 1 lowest kstack 0xc16892c0
kernel: supervisor trap page fault, code=0
Stopped in pid 0.1 (system) at  netbsd:nct_match+0x194: repe cmpsb      (%esi),%

bt
nct_match(c1cea588,c13e59f8,c168bbb4,c168bbb4,c032ef96,ffffffff,ffffffff,0,fffff
fff,0) at netbsd:nct_match+0x194
isasearch(c1cea588,c13e59f8,c168bc80,0,c13e59f8,c14b9f2c,c168bc60,c096184e,c10f3
dac,c10f3dac) at netbsd:isasearch+0x34
mapply(c10f3dac,c10f3dac,c1c13704,c1c1370c,c168bc4c,c10ac258,c032f2d9,c1cea588,c
168bc80,0) at netbsd:mapply+0x2f
config_search_loc(c032f2d9,c1cea588,c10f3dac,c168bc80,0,5,ffffffff,0,ffffffff,0)
 at netbsd:config_search_loc+0xdf
isarescan(c1cea588,c10f3dac,c0f81904,c1cea588,c1ccc748,c1cea588,c13e6be0,c10f3da
c,c168bcf8,c096233e) at netbsd:isarescan+0x8f
isaattach(c1ccc748,c1cea588,c168bd5c,c168bd5c,c13e56e0,c1cea588,c168bd5c,c1ccc74
8,0,c168bd24) at netbsd:isaattach+0xc4
config_attach_loc(c1ccc748,c13e56e0,0,c168bd5c,c032f8e2,c168bd30,c1ccc748,c1ce70
08,c1c203c8,c168bd44) at netbsd:config_attach_loc+0x183
config_found_sm_loc(c1ccc748,c10b2d1f,0,c168bd5c,c032f8e2,0,c168bd78,c0324e51,c1
ccc748,c10b2d1f) at netbsd:config_found_sm_loc+0x4f
config_found_ia(c1ccc748,c10b2d1f,c168bd5c,c032f8e2,0,c1372720,c1372700,c1372f60
,c13f3980,c1b178f0) at netbsd:config_found_ia+0x36
pcibrescan(c1ccc748,c10b2d1f,0,c168bdb8,c09620ea,c1ccc748,0,0,2,4) at netbsd:pci
brescan+0x82
pcib_callback(c1ccc748,0,0,2,4,c13bb934,c1c203c8,c13e6be0,c10f1bcb,c168bde4) at 
netbsd:pcib_callback+0x21
config_process_deferred(c1c20048,c1c203c8,c168be4c,c168be4c,c13e49d8,c1c203c8,c1
68be4c,c1c20048,0,c168be10) at netbsd:config_process_deferred+0x63
config_attach_loc(c1c20048,c13e49d8,0,c168be4c,c01a70f2,c168be2c,c10b2d10,c1af88
c8,c1c20048,c168be30) at netbsd:config_attach_loc+0x198
config_found_sm_loc(c1c20048,c10b2d10,0,c168be4c,c01a70f2,0,c168be88,c0125fef,c1
c20048,c10b2d10) at netbsd:config_found_sm_loc+0x4f
config_found_ia(c1c20048,c10b2d10,c168be4c,c01a70f2,c168be4c,c1372720,c1372720,c
1372700,c1373060,0) at netbsd:config_found_ia+0x36
i386_mainbus_rescan(c1c20048,c10b2d10,0,c1c20048,c0126192,cd770000,c1c20048,c13e
6be0,c10b14db,c168bed4) at netbsd:i386_mainbus_rescan+0x27c
i386_mainbus_attach(0,c1c20048,0,c0126192,0,0,0,0,0,c1c20048) at netbsd:i386_mai
nbus_attach+0x96
mainbus_attach(0,c1c20048,0,0,c13e49c0,c1c20048,0,c10b14db,1693000,c168bf54) at 
netbsd:mainbus_attach+0x6c
config_attach_loc(0,c13e49c0,0,0,0,3320,aa6a000,c168bf64,c0116973,c10b14db) at n
etbsd:config_attach_loc+0x183
config_rootfound(c10b14db,0,c168bfb0,c0dc3b29,3,6,3,0,0,0) at netbsd:config_root
found+0x4a
cpu_configure(3,6,3,0,0,0,0,0,0,0) at netbsd:cpu_configure+0x33
main(0,0,0,0,0,0,0,0,0,0) at netbsd:main+0x319

>How-To-Repeat:
Boot install or generic kernel on i386.
>Fix: