Re: [PATCH] pktgen: use dynamic allocation for debug print buffer

[Wang Jian]

>> +  kfree(buf);
free tb? buf is an array.

On Wed, Mar 14, 2018 at 8:25 AM, David Miller <davem@xxxxxxxxxxxxx> wrote:
> From: Arnd Bergmann <arnd@xxxxxxxx>
> Date: Tue, 13 Mar 2018 21:58:39 +0100
>
>> After the removal of the VLA, we get a harmless warning about a large
>> stack frame:
>>
>> net/core/pktgen.c: In function 'pktgen_if_write':
>> net/core/pktgen.c:1710:1: error: the frame size of 1076 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]
>>
>> The function was previously shown to be safe despite hitting
>> the 1024 bye warning level. To get rid of the annoyging warning,
>> while keeping it readable, this changes it to use strndup_user().
>>
>> Obviously this is not a fast path, so the kmalloc() overhead
>> can be disregarded.
>>
>> Fixes: 35951393bbff ("pktgen: Remove VLA usage")
>> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
>
> Applied, thanks.