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Re: [PATCH v3 1/2] Fix net.c warning on GCC 11
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From: |
Philippe Mathieu-Daudé |
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Subject: |
Re: [PATCH v3 1/2] Fix net.c warning on GCC 11 |
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Date: |
Thu, 14 Jan 2021 16:09:52 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 |
On 1/14/21 3:42 PM, Alexander Bulekov wrote:
> On 210114 1538, Miroslav Rezanina wrote:
>> On Thu, Jan 14, 2021 at 09:19:20AM -0500, Alexander Bulekov wrote:
>>> On 210114 1415, Philippe Mathieu-Daudé wrote:
>>>> +Jason +Dmitry
>>>>
>>>> On 1/14/21 8:07 AM, Miroslav Rezanina wrote:
>>>>> When building qemu with GCC 11, compiling eth.c file produce following
>>>>> warning:
>>>>>
>>>>> warning: array subscript 'struct ip6_ext_hdr_routing[0]' is partly
>>>>> outside array bounds of 'struct ip6_ext_hdr[1]' [-Warray-bounds]
>>>>>
>>>>> This is caused by retyping from ip6_ext_hdr to ip6_ext_hdr_routing that
>>>>> has more
>>>>> attributes.
>>>>>
>>>>> As this usage is expected, suppress the warning temporarily through the
>>>>> function
>>>>> using this retyping.
>>>>
>>>> This is not expected, this is a bug...
>>>>
>>>
>>> Seems related: https://bugs.launchpad.net/qemu/+bug/1879531
>>> -Alex
>>>
>>
>> Yes, it is caused by the issue triggering the warning. Do you know
>> whether the patch mentioned in bug was already sent?
>>
>> Mirek
>
> I don't think so..
Just sent one:
https://lists.gnu.org/archive/html/qemu-devel/2021-01/msg03205.html