From: Nikolay Aleksandrov <nikolay@cumulusnetworks•com>
To: David Miller <davem@davemloft•net>, fengguang.wu@intel•com
Cc: kbuild-all@01•org, netdev@vger•kernel.org
Subject: Re: [net-next:master 630/633] net/bridge/br_netlink.c:1110:1: warning: the frame size of 2160 bytes is larger than 2048 bytes
Date: Mon, 5 Oct 2015 11:43:08 +0200 [thread overview]
Message-ID: <5612462C.9020401@cumulusnetworks.com> (raw)
In-Reply-To: <561243F6.1060009@cumulusnetworks.com>
On 10/05/2015 11:33 AM, Nikolay Aleksandrov wrote:
> On 10/05/2015 11:47 AM, David Miller wrote:
>> From: kbuild test robot <fengguang.wu@intel•com>
>> Date: Mon, 5 Oct 2015 10:42:54 +0800
>>
>>> tree: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master
>>> head: 3e087caa23ef36370bfb925d3bbca78e8302d3ce
>>> commit: 7e4df51eb35deedd3ba8d4db92a6c36fb7eff90a [630/633] bridge: netlink: add support for igmp's intervals
>>> config: x86_64-randconfig-s0-10051005 (attached as .config)
>>> reproduce:
>>> git checkout 7e4df51eb35deedd3ba8d4db92a6c36fb7eff90a
>>> # save the attached .config to linux build tree
>>> make ARCH=x86_64
>>>
>>> All warnings (new ones prefixed by >>):
>>>
>>> net/bridge/br_netlink.c: In function 'br_fill_info':
>>>>> net/bridge/br_netlink.c:1110:1: warning: the frame size of 2160 bytes is larger than 2048 bytes [-Wframe-larger-than=]
>>> }
>>
>> Nikolay, please look into this.
>>
>
> I am, this looks like to be caused by enabling KASAN (kernel address sanitizer), there's
> a lot of additional code generated and the frame grows bigger.
> The same thing is being discussed here:
> http://www.spinics.net/lists/linux-media/msg93925.html
>
> The real size is much smaller without kasan.
>
I'm not sure how to proceed, would you like me to shrink the frame size so it's
less than 2160 bytes with KASAN enabled ?
It's 216 (without kasan) bytes vs 2160 (with).
Thanks,
Nik
next prev parent reply other threads:[~2015-10-05 9:43 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-05 2:42 [net-next:master 630/633] net/bridge/br_netlink.c:1110:1: warning: the frame size of 2160 bytes is larger than 2048 bytes kbuild test robot
2015-10-05 9:47 ` David Miller
2015-10-05 9:33 ` Nikolay Aleksandrov
2015-10-05 9:43 ` Nikolay Aleksandrov [this message]
2015-10-05 10:11 ` [PATCH net-next] bridge: netlink: make br_fill_info's frame size smaller Nikolay Aleksandrov
2015-10-07 11:16 ` David Miller
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