Re: [GIT PULL] x86 fixes for 3.9

From: Michel Lespinasse
Date: Fri Apr 26 2013 - 05:02:26 EST

On Fri, Apr 26, 2013 at 1:49 AM, Matt Fleming <matt.fleming@xxxxxxxxx> wrote:
> On 26/04/13 08:43, Michel Lespinasse wrote:
>> Still seeing the crash.
>> I went and compared the crash dump with the vmlinux disassembly; the
>> issue is a NULL pointer dereference in list_for_each_entry_safe().
>> list_empty() checks that the head node points to itself, but here the
>> head node has NULL. I think this may be due to gsmi_init() being
>> called before efivars_init(). Not sure what's the proper fix though.
> Ohh... I see what you mean. The bug is in variable_is_present() because
> it accesses __efivars directly, which a) isn't the struct efivars gsmi.c
> uses and b) hasn't been initialised. Something like this might work.

[... skipping patch ...]

Yes, this one fixes it. Thanks !

Michel "Walken" Lespinasse
A program is never fully debugged until the last user dies.
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