Re: alloc magic is broken at... error

[Andrey Borzenkov]

В Mon, 20 Jan 2014 10:30:33 -0500
SevenBits <address@hidden> пишет:

> On Jan 20, 2014, at 10:27 AM, Andrey Borzenkov <address@hidden> wrote:
> 
> > В Mon, 20 Jan 2014 09:59:40 -0500
> > SevenBits <address@hidden> пишет:
> > 
> >> On Jan 19, 2014, at 9:23 PM, Andrey Borzenkov <address@hidden> wrote:
> >> 
> >>> В Sun, 19 Jan 2014 19:45:23 -0500
> >>> SevenBits <address@hidden> пишет:
> >>> 
> >>>> Not sure whether to post this in this bug-grub list or here, so feel 
> >>>> free to correct me if perhaps this is in the wrong spot. I’m not sure if 
> >>>> the issue I’m having is due to a fault in setup or a bug within GRUB.
> >>>> 
> >>>> I’m the developer of a tool called Mac Linux USB Loader, and some of my 
> >>>> users are reporting errors with my compiled copy of GRUB. Specifically, 
> >>>> after loading the kernel, GRUB spits out the following error message:
> >>>> 
> >>>> alloc magic is broken at 0x81493ca0: 207d007d68746170
> >>>> Aborted. Press any key to exit.
> >>>> 
> >>>> The hexadecimal values vary slightly, but generally speaking this is 
> >>>> what the error looks like. The kernel loading operation with GRUB’s 
> >>>> linux command is followed by the initrd command to load the RAM disc, 
> >>>> and that operation never occurs, so I know that the operation never 
> >>>> completes.
> >>>> 
> >>>> This error never seems to occur with Ubuntu-based distributions. It also 
> >>>> seems to occur if the kernel can’t be found - but in that case, 
> >>>> shouldn’t the linux command fail with an error instead of something like 
> >>>> this?
> >>>> 
> >>>> I can’t post my GRUB config at the moment, as I’m not on the machine 
> >>>> where it is stored, but any advice that you can give me without it would 
> >>>> be appreciated, such as under what conditions this error occurs.
> >>>> 
> >>>> Thanks,
> >>>> 
> >>>> — SevenBits
> >>> 
> >>> Well, the first thing to try would be upstream HEAD to verify whether
> >>> problem is still present there.
> >> 
> >> Sorry, just realized my previous reply didn’t get posted.
> >> 
> >> The GRUB build I’m using is compiled straight from the current git 
> >> repository. It might be a week or two old, but unless something really 
> >> changed in the last two to three weeks I don’t think it’ll differ.
> >> 
> > 
> > In this case you need to post to gurb-devel. Is there any way to get
> > output to serial console?
> 
> No, I don’t think so, unless there’s some GRUB trick that I don’t know about. 
> Once this happens GRUB crashes to a stop and I can’t do anything.
> 

You could change to serial console before running this command and
enable debugging.

> > 
> >> I can try an older release of GRUB, like the latest stable and see if that 
> >> does anything though.
>

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