Kernel unaligned instruction access

[The Fungi <fungi@yuggoth.org>]

I'm running Martin's linux-image-2.6.26-rc9-r4k-ip22 version
2.6.26~rc9-1~experimental.1 on my Indy, and am seeing "subprocess
dpkg-split killed by signal (Segmentation fault)" at random points
during package upgrades, resulting in the following on the console
(all with the same timestamp, omitted for brevity). Does this look
like a kernel problem, or just good old-fashioned hardware failure?

Kernel unaligned instruction access[#1]:
Cpu 0
$ 0   : 0000000000000000 000000001000cce1 0000000000000000 ffffff0000000000
$ 4   : 00000000000004a9 ffffffff88362488 ffffffff89c4ae30 ffffffffffff00fe
$ 8   : 0000000000000000 0000000000000001 0000000000000000 ffffffff8bdb5858
$12   : ffffffff89d13fe0 000000000000cc00 0000000000000000 ffffffff8bf58000
$16   : 6465762c206c6962 ffffffff882b1500 ffffffff8bea7080 ffffffff8835c2b0
$20   : ffffffff8bee10b8 ffffffff880c8de8 0000000000000000 ffffffff883dca58
$24   : 0000000000000000 ffffffff88173398
$28   : ffffffff89d10000 ffffffff89d139f0 ffffffff883e0000 6775696c65332c20
Hi    : 0000000000000000
Lo    : 0000000000989680
epc   : 6775696c65332c20 0x6775696c65332c20     Not tainted
ra    : 6775696c65332c20 0x6775696c65332c20
Status: 1004cce3    KX SX UX KERNEL EXL IE
Cause : 10000010
BadVA : 6775696c65332c20
PrId  : 00000460 (R4400SC)
Modules linked in: ipv6
Process dpkg (pid: 1193, threadinfo=ffffffff89d10000, task=ffffffff8bdb5810, tls=000000002aad1ac0)
Stack : 6c69626775696c65 342c206c69626775 696c65360a446570 656e64733a206c69
        62633620283e3d20 322e332e322e6473 312d34292c206c69 626c74646c332028
        3e3d20312e352d33 292c206c69626e63 7572736573352028 3e3d20352e332e32
        303033303531302d 31292c206c696272 6561646c696e6534 20283e3d20342e33
        2d31290a53756767 657374733a206c69 626775696c652d64 65760a436f6e666c
        696374733a206775 696c652d6c69622c 206775696c652d64 65762c207363776d
        20283c3d20302e38 612d38292c206c69 626775696c65360a 46696c656e616d65
        3a20706f6f6c2f6d 61696e2f672f6775 696c652d636f7265 2f6c69626775696c
        65395f312e342d32 365f6d6970732e64 65620a53697a653a 203630313835360a
        4d443573756d3a20 3837346261396236 3937316361653832 3137613735336635
        ...
Call Trace:
[<ffffffff8802edcc>] schedule_tail+0x1c/0x68
[<ffffffff88006498>] syscall_exit+0x0/0x38


Code:Unhandled kernel unaligned access[#2]:
Cpu 0
$ 0   : 0000000000000000 000000001004cce0 6775696c65332c1c 0000000000000000
$ 4   : ffffffff8800c8f8 6775696c65332c14 ffffffff8800aba4 ffffffffbfbd9830
$ 8   : ffffffff8835fb00 0000000000000034 ffffffff89d13700 0000000000000000
$12   : 000000001004cce0 000000001000001e 0000000000000038 0000000000000003
$16   : ffffffff89d13700 ffffffff8c430000 0000000000000010 ffffff0000000000
$20   : ffffffff88310000 ffffffff880c8de8 0000000000000000 ffffffff883dca58
$24   : ffffffff89d135d5 ffffffff88173398
$28   : ffffffff89d10000 ffffffff89d136d0 ffffffff883e0000 ffffffff88006420
Hi    : 0000000000000039
Lo    : ba5e353f7cea6200
epc   : ffffffff8800c910 do_ade+0x300/0x480     Not tainted
ra    : ffffffff88006420 ret_from_exception+0x0/0x24
Status: 1004cce2    KX SX UX KERNEL EXL
Cause : 10008410
BadVA : 6775696c65332c14
PrId  : 00000460 (R4400SC)
Modules linked in: ipv6
Process dpkg (pid: 1193, threadinfo=ffffffff89d10000, task=ffffffff8bdb5810, tls=000000002aad1ac0)
Stack : fffffffffffffffd 0000000000000000 0000000000000000 6775696c65332c20
        ffffffff88006420 0000000000000015 0000000000000000 000000001004cce0
        6775696c65332c14 0000000000000000 0000000000000000 ffffffff88360000
        00000000000006e5 ffffffffbfbd9830 ffffffff8835fb00 0000000000000034
        0000000000002a7a ffffffff883e0000 ffffffff883e0000 ffffffff883e0000
        0000000000000038 0000000000000003 fffffffffffffffd 0000000000000000
        0000000000000000 6775696c65332c20 ffffffff88310000 ffffffff880c8de8
        0000000000000000 ffffffff883dca58 ffffffff89d135d5 ffffffff88173398
        ffffffff89d137f8 67653a2062617474 ffffffff89d10000 ffffffff89d13830
        ffffffff883e0000 ffffffff8800aadc 000000001004cce2 0000000000000039
        ...
Call Trace:
[<ffffffff8800c910>] do_ade+0x300/0x480
[<ffffffff88006420>] ret_from_exception+0x0/0x24
[<ffffffff8800aba8>] show_code+0xf8/0x138
[<ffffffff8800b8f8>] show_registers+0x58/0x70
[<ffffffff8800b990>] die+0x80/0x100
[<ffffffff8800ca58>] do_ade+0x448/0x480
[<ffffffff88006420>] ret_from_exception+0x0/0x24


Code: 00621824  5460ffbd  de020100 <88b20000> 98b20003  24020000  1440ffe8  00000000  0a003217

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