Re: [edk2-devel] AArch64 with HeapGuard: page allocations wrongly aligned

["Oliver Smith-Denny" <osde@linux.microsoft.com>]

On 2/5/2024 9:58 AM, Rebecca Cran wrote:
> On 2/5/2024 10:51 AM, Oliver Smith-Denny wrote:
>> Well that's a bummer :). I moved to top of tree edk2 and added
>> StatusCodeHandlerRuntimeDxe to the ArmVirtQemu build and I am
>> not seeing your crash. Do you have any PCDs set for this driver?
> 
> Our code is pretty heavily customized, so it's likely it's doing 
> something differently. I can debug it further later this week.
> 

Ok, it would be interesting to see what is happening here. Out of
curiousity, does this repro if you only have page or pool guards set,
not both? My shell bug only repros if both are set (which would seem
to point to a bug in shared guard pages).

>>
>> I am running with the HeapGuard PCDs you sent before:
>>
>> gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPropertyMask|0x0F
>> gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPageType|0xC00000000000FFFF
>> gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPoolType|0xC00000000000FFFF
>>
>> However, I am seeing a crash when the shell launches now, so I will
>> debug this. Something changed in the upstream, probably exposing a bug
>> in my code. Let's see if it is the same thing as you are seeing.
> 
> Could it be this bug you're running into? 
> https://bugzilla.tianocore.org/show_bug.cgi?id=1463
> 

Unfortunately the suggested patch does not fix the bug.

Thanks,
Oliver


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