linux-kernel - Re: 3.10.0 i386 uniprocessor panic

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Date:	19 Jul 2013 17:00:36 -0400
From:	"George Spelvin" <linux@...izon.com>
To:	hpa@...or.com, linux@...izon.com
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 3.10.0 i386 uniprocessor panic

>> EIP is at 0xc143a091
>> EAX: c143a090 EBX: 00000100 ECX: f3150000 EDX: c143a090
>> ESI: c143a090 EDI: c143a090 EBP: c143a090 ESP: f3151eec
>>  DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
>> CR0: 80050033 CR2: a090c143 CR3: 331c6000 CR4: 000007d0
>> DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
>> DR6: ffff0ff0 DR7: 00000400

>> (The CR2 value looks particularly odd.)

> Indeed it does; it is a user space value, but it doesn't look like
> either a normal user space value nor really as a trivially buggered-up
> kernel pointer value, unless the 0xc143... at the bottom is the upper
> half of a kernel pointer, in which case we probably obtained this value
> from a corrupt, misaligned pointer.

Er... I assumed you'd see instantly that it was the 0xc143a090 value
that's in 5 registers (EAX/EDX/ESI/EDI/EBP), and IP-1, but with the
halves swapped.

How the heck the halves got swapped is confusing me...
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