linux-kernel - Re: [PATCH] net: ethernet/mellanox: fix dereference before null check

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Message-ID: <202209302306.gu1lX5It-lkp@intel.com>
Date:   Fri, 30 Sep 2022 23:52:27 +0800
From:   kernel test robot <lkp@...el.com>
To:     Praghadeesh T K S <praghadeeshthevendria@...il.com>,
        Boris Pismenny <borisp@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        Leon Romanovsky <leon@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     kbuild-all@...ts.01.org, netdev@...r.kernel.org,
        praghadeeshtks@...omail.in,
        linux-kernel-mentees@...ts.linuxfoundation.org
Subject: Re: [PATCH] net: ethernet/mellanox: fix dereference before null check

Hi Praghadeesh,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on net-next/master]
[also build test WARNING on next-20220929]
[cannot apply to net/master linus/master v6.0-rc7]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Praghadeesh-T-K-S/net-ethernet-mellanox-fix-dereference-before-null-check/20220930-194848
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 10c2aba89cc0535b23ebc795f44b8b8b16785ec9
config: s390-allyesconfig
compiler: s390-linux-gcc (GCC) 12.1.0
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://github.com/intel-lab-lkp/linux/commit/b435d653648a9712105eb8d3c65fb3a0b301ab0e
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Praghadeesh-T-K-S/net-ethernet-mellanox-fix-dereference-before-null-check/20220930-194848
        git checkout b435d653648a9712105eb8d3c65fb3a0b301ab0e
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash drivers/net/ethernet/mellanox/mlx5/core/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

   drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c: In function 'mlx5e_macsec_cleanup':
>> drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c:1853:9: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
    1853 |         struct mlx5_core_dev *mdev = macsec->mdev;
         |         ^~~~~~


vim +1853 drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c

  1845	
  1846	void mlx5e_macsec_cleanup(struct mlx5e_priv *priv)
  1847	{
  1848		struct mlx5e_macsec *macsec = priv->macsec;
  1849	
  1850		if (!macsec)
  1851			return;
  1852	
> 1853		struct mlx5_core_dev *mdev = macsec->mdev;

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

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