drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c:2883:32: error: '%s' directive output may be truncated writing up to 31 bytes into a region of size 26

drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c:2883:32: error: '%s' directive output may be truncated writing up to 31 bytes into a region of size 26

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   e70140ba0d2b1a30467d4af6bcfe761327b9ec95
commit: 63185eb3aa267f2844580bbd8c9c1c97516f5dbb bnxt_en: Provide stored devlink "fw" version on older firmware
date:   3 years, 1 month ago
config: x86_64-rhel-9.4-nofixup (https://download.01.org/0day-ci/archive/20241202/202412022114.TqaFj4RR-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241202/202412022114.TqaFj4RR-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202412022114.TqaFj4RR-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c: In function 'bnxt_ethtool_init':
>> drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c:2883:32: error: '%s' directive output may be truncated writing up to 31 bytes into a region of size 26 [-Werror=format-truncation=]
    2883 |                          "/pkg %s", buf);
         |                                ^~   ~~~
   In function 'bnxt_get_pkgver',
       inlined from 'bnxt_ethtool_init' at drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c:3723:3:
   drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c:2882:17: note: 'snprintf' output between 6 and 37 bytes into a destination of size 31
    2882 |                 snprintf(bp->fw_ver_str + len, FW_VER_STR_LEN - len - 1,
         |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    2883 |                          "/pkg %s", buf);
         |                          ~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors


vim +2883 drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c

  2873	
  2874	static void bnxt_get_pkgver(struct net_device *dev)
  2875	{
  2876		struct bnxt *bp = netdev_priv(dev);
  2877		char buf[FW_VER_STR_LEN];
  2878		int len;
  2879	
  2880		if (!bnxt_get_pkginfo(dev, buf, sizeof(buf))) {
  2881			len = strlen(bp->fw_ver_str);
  2882			snprintf(bp->fw_ver_str + len, FW_VER_STR_LEN - len - 1,
> 2883				 "/pkg %s", buf);
  2884		}
  2885	}
  2886	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki