Re: [PATCH 04/22] scsi: fusion: fix string overflow warning

[Arnd Bergmann]

On Mon, Jul 17, 2017 at 11:17 AM, David Laight <David.Laight@xxxxxxxxxx> wrote:
> From: Arnd Bergmann
>> Sent: 14 July 2017 13:07
>> gcc points out a theorerical string overflow:
>>
>> drivers/message/fusion/mptbase.c: In function 'mpt_detach':
>> drivers/message/fusion/mptbase.c:2103:17: error: '%s' directive writing up to 31 bytes into a region
>> of size 28 [-Werror=format-overflow=]
>> sprintf(pname, MPT_PROCFS_MPTBASEDIR "/%s/summary", ioc->name);
>>                ^~~~~
>> drivers/message/fusion/mptbase.c:2103:2: note: 'sprintf' output between 13 and 44 bytes into a
>> destination of size 32
>>
>> We can simply double the size of the local buffer here to be on the
>> safe side.
>
> I think I'd change it to snprintf() as well.
> Saves any worries if ioc->name isn't '\0' terminated.

Ok, fair enough, I'll send a new version right away.

      Arnd