[edk2-devel] [PATCH v2 4/7] ArmPkg/DefaultExceptionHandlerLib: Check DebugImageInfoTable type safely

[Marvin Häuser]

On 09/08/2021 14:40, Marvin Häuser wrote:
> On 09/08/2021 13:55, Ard Biesheuvel wrote:
>> On Mon, 9 Aug 2021 at 11:51, Marvin Häuser <mhaeuser at posteo.de> wrote:
>>> C does not allow casting to or dereferencing incompatible pointer
>>> types. Use the ImageInfoType member of the union first to determine
>>> the data type before dereferencing NormalImage.
>>>
>>> Cc: Leif Lindholm <leif at nuviainc.com>
>>> Cc: Ard Biesheuvel <ardb+tianocore at kernel.org>
>>> Cc: Vitaly Cheptsov <vit9696 at protonmail.com>
>>> Signed-off-by: Marvin Häuser <mhaeuser at posteo.de>
>> Hi Marvin,
>>
>> Could you please organize your patches into a consistent series,
>> include a cover letter and cc me on everything?
>
> Hey Ard,
>
> It's a series and there is a cover letter at: 
> https://edk2.groups.io/g/devel/topic/patch_v2_0_7_fix_various/84764899?p=,,,20,0,0,0::recentpostdate%2Fsticky,,,20,2,0,84764899
> The mails from yesterday can certainly be discarded, for some reason 
> format-patch did not number the patches without the argument.
> The mails from today are numbered and there is a cover letter, but for 
> some reason the threading is all wrong in Thunderbird for me. All 
> subsequent patches have the "In-Reply-To" header in the patch files, I 
> think it is supposed to work off of that? Is threading broken for you 
> as well? Any idea what could have gone wrong?

Today I learned two things.

1) Both format-patch and send-email support threading individually, and 
they don't cooperate [1].

2) Groups.io does not like patch sets [2].

*Sigh*. Sorry.

Best regards,
Marvin


[1] "It is up to the user to ensure that no In-Reply-To header already 
exists when git send-email is asked to add it (especially note that git 
format-patch can be configured to do the threading itself). Failure to 
do so may not produce the expected result in the recipient’s MUA.", 
https://git-scm.com/docs/git-send-email

[2] "Note: This checkbox is selected by default in new Groups.io 
accounts. If you do not want to see copies of your own messages, clear 
this checkbox. [...] (For those interested in the technical details: 
When this checkbox is selected, Groups.io replaces the Message-Id header 
with a new, system-generated one and renames the original Message-Id 
header to X-Orig-Message-Id.)", 
https://groups.io/helpcenter/membersmanual?single=true

>
> I will create a V3 with you CC'd on all patches once I understand 
> everything that went wrong. Is it normal to CC all people from each 
> patch on all patches of a series?
>
> Thanks and so sorry for the hassle!
>
> Best regards,
> Marvin
>
>> I am going to disregard anything you sent yesterday and today, as it
>> is a bit of a jumble.
>>
>> Thanks,
>> Ard.
>>
>>
>>> ---
>>> ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerUefi.c 
>>> | 4 ++--
>>>   1 file changed, 2 insertions(+), 2 deletions(-)
>>>
>>> diff --git 
>>> a/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerUefi.c 
>>> b/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerUefi.c 
>>>
>>> index e9fea4038252..9befb6d4db9b 100644
>>> --- 
>>> a/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerUefi.c
>>> +++ 
>>> b/ArmPkg/Library/DefaultExceptionHandlerLib/DefaultExceptionHandlerUefi.c
>>> @@ -51,8 +51,8 @@ GetImageName (
>>>
>>>     Address = (CHAR8 *)(UINTN)FaultAddress;
>>>     for (Entry = 0; Entry < DebugTableHeader->TableSize; Entry++, 
>>> DebugTable++) {
>>> -    if (DebugTable->NormalImage != NULL) {
>>> -      if ((DebugTable->NormalImage->ImageInfoType == 
>>> EFI_DEBUG_IMAGE_INFO_TYPE_NORMAL) &&
>>> +    if (DebugTable->ImageInfoType != NULL) {
>>> +      if ((*DebugTable->ImageInfoType == 
>>> EFI_DEBUG_IMAGE_INFO_TYPE_NORMAL) &&
>>> (DebugTable->NormalImage->LoadedImageProtocolInstance != NULL)) {
>>>           if ((Address >= (CHAR8 
>>> *)DebugTable->NormalImage->LoadedImageProtocolInstance->ImageBase) &&
>>>               (Address <= ((CHAR8 
>>> *)DebugTable->NormalImage->LoadedImageProtocolInstance->ImageBase + 
>>> DebugTable->NormalImage->LoadedImageProtocolInstance->ImageSize))) {
>>> -- 
>>> 2.31.1
>>>
>>
>> 
>>
>>
>



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