Re: [edk2-devel] [PATCH v1] SctPkg: Fixed a pinter error in DevicePathFromTextBBTestCoverage.c

["Chao Li" <lichao@loongson.cn>]

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Hi Heinrich,

I guess it is not allowed to make them the same now, so I submitted V2, 
added your recomended fix message to the commit message, and also added 
more reviewers.


Thanks,
Chao
On 2024/2/27 09:15, Chao Li wrote:
>
> Hi Heinrich,
>
> On 2024/2/26 19:02, Heinrich Schuchardt wrote:
>> On 26.02.24 11:17, Chao Li wrote:
>>> DevicePathFromTextBBTextCoverage.c function CreateDNSDeviceNode has a
>>> bug, code:
>>>
>>> SctStrToIPv4Addr (&IpStr1, (EFI_IPv4_ADDRESS *)(DNS + sizeof 
>>> (DNS_DEVICE_PATH)));
>>>
>>> DNS is a pointer, which is increased by a structure size and converted
>>> to EFI_IPv4_ADDRESS*, which will point to an unknown address. So fix 
>>> it.
>>
>> Hello Chao,
>>
>> thanks for diving into this.
>>
>> Please, add
>>
>> Fixes: 847e0363e846 ("SctPkg: Fix the UefiSct 
>> -Wincompatible-pointer-types warnings")
>>
>>>
>>> BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4712
>>>
>>> Cc: G Edhaya Chandran <Edhaya.Chandran@...>
>>> Cc: Barton Gao <gaojie@...>
>>> Cc: Carolyn Gjertsen <Carolyn.Gjertsen@...>
>>> Signed-off-by: Chao Li <lichao@...>
>>> ---
>>>   .../BlackBoxTest/DevicePathFromTextBBTestCoverage.c       | 8 
>>> ++++----
>>>   1 file changed, 4 insertions(+), 4 deletions(-)
>>>
>>> diff --git 
>>> a/uefi-sct/SctPkg/TestCase/UEFI/EFI/Protocol/DevicePathFromText/BlackBoxTest/DevicePathFromTextBBTestCoverage.c 
>>> b/uefi-sct/SctPkg/TestCase/UEFI/EFI/Protocol/DevicePathFromText/BlackBoxTest/DevicePathFromTextBBTestCoverage.c 
>>>
>>> index c96ee246..bd11c25a 100644
>>> --- 
>>> a/uefi-sct/SctPkg/TestCase/UEFI/EFI/Protocol/DevicePathFromText/BlackBoxTest/DevicePathFromTextBBTestCoverage.c
>>> +++ 
>>> b/uefi-sct/SctPkg/TestCase/UEFI/EFI/Protocol/DevicePathFromText/BlackBoxTest/DevicePathFromTextBBTestCoverage.c
>>> @@ -1734,13 +1734,13 @@ CreateDNSDeviceNode (
>>>     }
>>>
>>>     if (DNS->IsIPv6 == 0) {
>>> -    SctStrToIPv4Addr (&IpStr1, (EFI_IPv4_ADDRESS *)(DNS + sizeof 
>>> (DNS_DEVICE_PATH)));
>>> -    SctStrToIPv4Addr (&IpStr2, (EFI_IPv4_ADDRESS *)(DNS + sizeof 
>>> (DNS_DEVICE_PATH) + sizeof(EFI_IP_ADDRESS)));
>>> +    SctStrToIPv4Addr (&IpStr1, (EFI_IPv4_ADDRESS *)((UINT8 *)DNS + 
>>> sizeof (DNS_DEVICE_PATH)));
>>> +    SctStrToIPv4Addr (&IpStr2, (EFI_IPv4_ADDRESS *)((UINT8 *)DNS + 
>>> sizeof (DNS_DEVICE_PATH) + sizeof(EFI_IP_ADDRESS)));
>>>     }
>>>
>>>     if (DNS->IsIPv6 == 1) {
>>> -    SctStrToIPv6Addr (&IpStr1, (EFI_IPv6_ADDRESS *)(DNS + sizeof 
>>> (DNS_DEVICE_PATH)));
>>> -    SctStrToIPv6Addr (&IpStr2, (EFI_IPv6_ADDRESS *)(DNS + sizeof 
>>> (DNS_DEVICE_PATH) + sizeof(EFI_IP_ADDRESS)));
>>> +    SctStrToIPv6Addr (&IpStr1, (EFI_IPv6_ADDRESS *)((UINT8 *)DNS + 
>>> sizeof (DNS_DEVICE_PATH)));
>>> +    SctStrToIPv6Addr (&IpStr2, (EFI_IPv6_ADDRESS *)((UINT8 *)DNS + 
>>> sizeof (DNS_DEVICE_PATH) + sizeof(EFI_IP_ADDRESS)));
>>
>> The change looks correct.
>>
>> I would prefer using the fields of the DNS_DEVICE_PATH typedef from 
>> MdePkg/Include/Protocol/DevicePath.h to avoid the conversions:
>>
>> > +    SctStrToIPv4Addr (&IpStr1, &DNS->DnsServerIp[0].v4)
>> > +    SctStrToIPv4Addr (&IpStr2, &DNS->DnsServerIp[1].v4)
>>
>> > +    SctStrToIPv6Addr (&IpStr1, &DNS->DnsServerIp[0].v6)
>> > +    SctStrToIPv6Addr (&IpStr2, &DNS->DnsServerIp[1].v6)
> I also prefer this way, but the definition of DNS in 
> UEFI/Protocol/DevicePath.h is not same as the MdePkg version, should 
> we make them the same?
>>
>> Best regards
>>
>> Heinrich
>>
>>>     }
>>>
>>>     return (EFI_DEVICE_PATH_PROTOCOL *) DNS;
>>> -- 
>>> 2.27.0
>>
>>
>>
>>
>>
> 


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