Re: [linux-next:master 3615/4301] include/linux/compiler_types.h:335:45: error: call to '__compiletime_assert_314' declared with attribute error: BUILD_BUG_ON failed: sizeof(txpd->tx_dest_addr) != ETH_ALEN

[Kees Cook <keescook@chromium.org>]

On Wed, Dec 01, 2021 at 09:43:01AM +0200, Kalle Valo wrote:
> + linux-wireless
> 
> kernel test robot <lkp@intel.com> writes:
> 
> > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> > head:   34f255a1e91ab44ff8926cf8294ff9144e62e861
> > commit: 5fd32ae0433a7af37eac27ace3aabae8cb7c2fc4 [3615/4301] libertas: Use struct_group() for memcpy() region
> > config: arm-randconfig-r011-20211129 (https://download.01.org/0day-ci/archive/20211130/202111302102.apaePz2J-lkp@intel.com/config)
> > compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0
> > reproduce (this is a W=1 build):
> >         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> >         chmod +x ~/bin/make.cross
> >         # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=5fd32ae0433a7af37eac27ace3aabae8cb7c2fc4
> >         git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
> >         git fetch --no-tags linux-next master
> >         git checkout 5fd32ae0433a7af37eac27ace3aabae8cb7c2fc4
> >         # save the config file to linux build tree
> >         mkdir build_dir
> >         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm SHELL=/bin/bash drivers/net/
> >
> > If you fix the issue, kindly add following tag as appropriate
> > Reported-by: kernel test robot <lkp@intel.com>
> >
> > All errors (new ones prefixed by >>):
> >
> >    In file included from <command-line>:
> >    drivers/net/wireless/marvell/libertas/tx.c: In function 'lbs_hard_start_xmit':
> >>> include/linux/compiler_types.h:335:45: error: call to '__compiletime_assert_314' declared with attribute error: BUILD_BUG_ON failed: sizeof(txpd->tx_dest_addr) != ETH_ALEN
> >      335 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
> >          |                                             ^
> >    include/linux/compiler_types.h:316:25: note: in definition of macro '__compiletime_assert'
> >      316 |                         prefix ## suffix();                             \
> >          |                         ^~~~~~
> >    include/linux/compiler_types.h:335:9: note: in expansion of macro '_compiletime_assert'
> >      335 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
> >          |         ^~~~~~~~~~~~~~~~~~~
> >    include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
> >       39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
> >          |                                     ^~~~~~~~~~~~~~~~~~
> >    include/linux/build_bug.h:50:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
> >       50 |         BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
> >          |         ^~~~~~~~~~~~~~~~
> >    drivers/net/wireless/marvell/libertas/tx.c:116:9: note: in expansion of macro 'BUILD_BUG_ON'
> >      116 |         BUILD_BUG_ON(sizeof(txpd->tx_dest_addr) != ETH_ALEN);
> >          |         ^~~~~~~~~~~~
> 
> Kees, can you take a look at this build error? You added the
> BUILD_BUG_ON(), right?

I will investigate! Given this doesn't happen on allmodconfig but
a randconfig trips it, this might be finding a legit issue, but I'll
report back more details.

Thanks for the heads-up!

-- 
Kees Cook