kern/52577: crashes in arm_cksumdata

[martin%NetBSD.org@localhost]

>Number:         52577
>Category:       kern
>Synopsis:       crashes in arm_cksumdata
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Sep 28 10:30:01 +0000 2017
>Originator:     Martin Husemann
>Release:        NetBSD 8.99.3
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD unpluged.duskware.de 8.99.3 NetBSD 8.99.3 (UNPLUGED) #87: Wed Sep 27 12:05:11 CEST 2017 martin%seven-days-to-the-wolves.aprisoft.de@localhost:/work/src/sys/arch/evbarm/compile/UNPLUGED evbarm
Architecture: earm
Machine: evbarm
>Description:

On a:

cpu0 at mainbus0 core 0: Sheeva 88SV131 rev 1 (ARM9E-S V5TE core)
cpu0: DC enabled IC enabled WB enabled EABT branch prediction enabled
cpu0: 16KB/32B 4-way L1 VIVT Instruction cache
cpu0: 16KB/32B 4-way write-back-locking-C L1 VIVT Data cache

with

mvgbe0: flags=0x8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	capabilities=3700<IP4CSUM_Rx,IP4CSUM_Tx,TCP4CSUM_Rx,UDP4CSUM_Rx>
	capabilities=3700<UDP4CSUM_Tx>
	enabled=3700<IP4CSUM_Rx,IP4CSUM_Tx,TCP4CSUM_Rx,UDP4CSUM_Rx>
	enabled=3700<UDP4CSUM_Tx>
	ec_capabilities=5<VLAN_MTU,JUMBO_MTU>
	ec_enabled=0
	address: 00:50:43:01:83:1e
	media: Ethernet autoselect (1000baseT full-duplex)
	status: active
	inet6 fe80::250:43ff:fe01:831e%mvgbe0/64 flags 0x0 scopeid 0x1
	inet6 2001:470:1f0b:e84:520e:bf47:2119:ad65/64 flags 0x0
	inet 192.168.150.127/23 broadcast 192.168.151.255 flags 0x0

trying to transfer a file caused this crash:

uvm_fault(0xc0564f30, ccecd000, 1) -> e
Fatal kernel mode data abort: 'Translation Fault (P)'
trapframe: 0xccebdb88
FSR=00000007, FAR=ccecda0c, spsr=20000013
r0 =ccecda0c, r1 =0000051a, r2 =00000000, r3 =0000f08c
r4 =0a080101, r5 =04000000, r6 =65101080, r7 =00000000
r8 =2851d82c, r9 =00000000, r10=0000057a, r11=ccecda2c
r12=00000000, ssp=ccebdbdc, slr=c0012c0c, pc =c0012cb0

Stopped in pid 756.1 (sshd) at  netbsd:arm_cksumdata+0x50:      ldmia   r0!, {r3
-r6}
db> bt

uvm_fault(0xc0564f30, ccecd000, 1) -> e
Fatal kernel mode data abort: 'Translation Fault (P)'
trapframe: 0xccebd3d8
FSR=00000007, FAR=ccecda2c, spsr=a0000013
r0 =fffffffd, r1 =c00131c4, r2 =00000000, r3 =fffffff4
r4 =ccecda2c, r5 =0000ffff, r6 =c02bc6c4, r7 =c04bb4b8
r8 =00000000, r9 =00000000, r10=0000ffff, r11=ccebd91c
r12=00000000, ssp=ccebd428, slr=c000f078, pc =c000f094

Faulted in DDB; continuing...



>How-To-Repeat:
not sure yet

>Fix:
n/a