Re: [Bisected][-next-20130204+] [x86/kvm] udevd:[97]: segfault at ffffffffff5fd020 ip 00007fff069e277f sp 00007fff068c9ef8 error d

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On 02/12/2013 04:26 PM, Peter Hurley wrote:
> With -next-20130204+ in ubuntu 12.10 VM (so the 80x25 VGA
> device/console):
> 
> [    0.666410] udevd[97]: starting version 175
> [    0.674043] udevd[97]: udevd:[97]: segfault at ffffffffff5fd020 ip 00007fff069e277f sp 00007fff068c9ef8 error d
> 
> and boots to an initramfs prompt.
> 
> git bisect (log attached) blames:
> 
> commit 7b5c4a65cc27f017c170b025f8d6d75dabb11c6f
> Merge: 3596f5b 949db15
> Author: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
> Date:   Fri Jan 25 16:31:21 2013 -0800
> 
>     Merge tag 'v3.8-rc5' into x86/mm
>     
>     The __pa() fixup series that follows touches KVM code that is not
>     present in the existing branch based on v3.7-rc5, so merge in the
>     current upstream from Linus.
>     
>     Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
> 
> 
> This only happens with the VGA device/console but that is the default
> configuration for Ubuntu/KVM because it blacklists pretty much every fb
> driver.
> 

I am guessing this is another bad use of __pa()... need to look into that.

	-hpa


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