Re: [PATCH AUTOSEL 4.18 39/65] fs/cifs: suppress a string overflow warning

2018-10-01 Thread Sasha Levin
On Mon, Oct 01, 2018 at 11:22:46AM +1000, Stephen Rothwell wrote:
>Hi Sasha,
>
>On Mon, 1 Oct 2018 00:38:27 + Sasha Levin  
>wrote:
>>
>> From: Stephen Rothwell 
>>
>> [ Upstream commit bcfb84a996f6fa90b5e6e2954b2accb7a4711097 ]
>>
>> A powerpc build of cifs with gcc v8.2.0 produces this warning:
>>
>> fs/cifs/cifssmb.c: In function ‘CIFSSMBNegotiate’:
>> fs/cifs/cifssmb.c:605:3: warning: ‘strncpy’ writing 16 bytes into a region 
>> of size 1 overflows the destination [-Wstringop-overflow=]
>>strncpy(pSMB->DialectsArray+count, protocols[i].name, 16);
>>^
>>
>> Since we are already doing a strlen() on the source, change the strncpy
>> to a memcpy().
>>
>> Signed-off-by: Stephen Rothwell 
>> Signed-off-by: Steve French 
>> Signed-off-by: Sasha Levin 
>
>Just wondering if this should be included as it only fixes a build
>warning, there is no actual bug.  Same for the 4.9 and 4.14 versions.

Hi Stephen,

We try to follow the same no-warnings policy like upstream and take
warning fixes into stable tree. It makes it possible to catch
"real" warnings in stable kernel that resulted from backporting issues.

--
Thanks,
Sasha

Re: [PATCH AUTOSEL 4.18 39/65] fs/cifs: suppress a string overflow warning

2018-09-30 Thread Stephen Rothwell
Hi Sasha,

On Mon, 1 Oct 2018 00:38:27 + Sasha Levin  
wrote:
>
> From: Stephen Rothwell 
> 
> [ Upstream commit bcfb84a996f6fa90b5e6e2954b2accb7a4711097 ]
> 
> A powerpc build of cifs with gcc v8.2.0 produces this warning:
> 
> fs/cifs/cifssmb.c: In function ‘CIFSSMBNegotiate’:
> fs/cifs/cifssmb.c:605:3: warning: ‘strncpy’ writing 16 bytes into a region of 
> size 1 overflows the destination [-Wstringop-overflow=]
>strncpy(pSMB->DialectsArray+count, protocols[i].name, 16);
>^
> 
> Since we are already doing a strlen() on the source, change the strncpy
> to a memcpy().
> 
> Signed-off-by: Stephen Rothwell 
> Signed-off-by: Steve French 
> Signed-off-by: Sasha Levin 

Just wondering if this should be included as it only fixes a build
warning, there is no actual bug.  Same for the 4.9 and 4.14 versions.

-- 
Cheers,
Stephen Rothwell


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