misc/177876: kernel stack overflow panic on mips64, EdgeRouter Lite

Joe Holden joe at rewt.org.uk
Mon Apr 15 22:50:02 UTC 2013

The following reply was made to PR misc/177876; it has been noted by GNATS.

From: Joe Holden <joe at rewt.org.uk>
To: bug-followup at FreeBSD.org, joe at rewt.org.uk
Subject: Re: misc/177876: kernel stack overflow panic on mips64, EdgeRouter
Date: Mon, 15 Apr 2013 23:42:19 +0100

 Having rebuilt the kernel with more debug and bringing my tree upto 
 HEAD, the kernel is consistently dropping to db on boot:
 FreeBSD 10.0-CURRENT #5 r249529: Mon Apr 15 23:28:04 BST 2013
 root at abby.lhr1.as41113.net:/usr/obj/mips.mips64/usr/src/sys/OCTEON-ERL mips
 gcc version 4.2.1 20070831 patched [FreeBSD]
 cpu:0-Trap cause = 2 (TLB miss (load or instr. fetch) - kernel mode)
 [ thread pid 0 tid 0 ]
 Stopped at      0xffffffff80268bdc:     lb      v0,0(s2)
 db> bt
 Tracing pid 0 tid 0 td 0xffffffff808a25f0
 ffffffff8067fd98+40 (?,?,?,?) ra ffffffff8013ba24 sp 98000000009305b0 sz 16
 ffffffff8013b898+18c (0,?,ffffffff,?) ra ffffffff8013b068 sp 
 98000000009305c0 sz 48
 ffffffff8013abe0+488 (?,?,?,?) ra ffffffff8013b334 sp 98000000009305f0 
 sz 192
 ffffffff8013b240+f4 (?,?,?,?) ra ffffffff8013ed88 sp 98000000009306b0 sz 16
 ffffffff8013ebe0+1a8 (?,?,?,?) ra ffffffff8031e180 sp 98000000009306c0 
 sz 816
 ffffffff8031dfe0+1a0 (?,?,?,?) ra ffffffff80696238 sp 98000000009309f0 sz 64
 trap+18a0 (?,?,?,?) ra ffffffff8068104c sp 9800000000930a30 sz 288
 MipsKernGenException+15c (0,bef000,ffffffff,3) ra ffffffff80268bdc sp 
 9800000000930b50 sz 368
 ffffffff80268b70+6c (?,?,?,?) ra ffffffff80248754 sp 9800000000930cc0 sz 48
 ffffffff80248548+20c (?,?,?,?) ra ffffffff80100134 sp 9800000000930cf0 sz 32
 ffffffff80100080+b4 (?,?,?,?) ra 0 sp 9800000000930d10 sz 0
 pid 0
 Not sure if that means anything to anyone!

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