linux-kernel - drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c:535:36: warning: '%d' directive writing between 1 and 11 bytes into a region of size 7

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Message-ID: <202310182158.KXRDW2Ao-lkp@intel.com>
Date:   Wed, 18 Oct 2023 21:27:18 +0800
From:   kernel test robot <lkp@...el.com>
To:     Geetha sowjanya <gakula@...vell.com>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Sunil Goutham <sgoutham@...vell.com>,
        Subbaraya Sundeep <sbhatta@...vell.com>
Subject: drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c:535:36:
 warning: '%d' directive writing between 1 and 11 bytes into a region of size
 7

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   06dc10eae55b5ceabfef287a7e5f16ceea204aa0
commit: d06c2aba51631bf6cd32a2f8f1edd67c110ade8a octeontx2-af: cn10k: mcs: Add debugfs support
date:   1 year ago
config: x86_64-buildonly-randconfig-006-20230826 (https://download.01.org/0day-ci/archive/20231018/202310182158.KXRDW2Ao-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/20231018/202310182158.KXRDW2Ao-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202310182158.KXRDW2Ao-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c: In function 'rvu_dbg_mcs_init':
>> drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c:535:36: warning: '%d' directive writing between 1 and 11 bytes into a region of size 7 [-Wformat-overflow=]
     535 |                 sprintf(dname, "mcs%d", i);
         |                                    ^~
   drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c:535:32: note: directive argument in the range [-2147483644, 2147483646]
     535 |                 sprintf(dname, "mcs%d", i);
         |                                ^~~~~~~
   drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c:535:17: note: 'sprintf' output between 5 and 15 bytes into a destination of size 10
     535 |                 sprintf(dname, "mcs%d", i);
         |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~


vim +535 drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c

   520	
   521	static void rvu_dbg_mcs_init(struct rvu *rvu)
   522	{
   523		struct mcs *mcs;
   524		char dname[10];
   525		int i;
   526	
   527		if (!rvu->mcs_blk_cnt)
   528			return;
   529	
   530		rvu->rvu_dbg.mcs_root = debugfs_create_dir("mcs", rvu->rvu_dbg.root);
   531	
   532		for (i = 0; i < rvu->mcs_blk_cnt; i++) {
   533			mcs = mcs_get_pdata(i);
   534	
 > 535			sprintf(dname, "mcs%d", i);
   536			rvu->rvu_dbg.mcs = debugfs_create_dir(dname,
   537							      rvu->rvu_dbg.mcs_root);
   538	
   539			rvu->rvu_dbg.mcs_rx = debugfs_create_dir("rx_stats", rvu->rvu_dbg.mcs);
   540	
   541			debugfs_create_file("flowid", 0600, rvu->rvu_dbg.mcs_rx, mcs,
   542					    &rvu_dbg_mcs_rx_flowid_stats_fops);
   543	
   544			debugfs_create_file("secy", 0600, rvu->rvu_dbg.mcs_rx, mcs,
   545					    &rvu_dbg_mcs_rx_secy_stats_fops);
   546	
   547			debugfs_create_file("sc", 0600, rvu->rvu_dbg.mcs_rx, mcs,
   548					    &rvu_dbg_mcs_rx_sc_stats_fops);
   549	
   550			debugfs_create_file("sa", 0600, rvu->rvu_dbg.mcs_rx, mcs,
   551					    &rvu_dbg_mcs_rx_sa_stats_fops);
   552	
   553			debugfs_create_file("port", 0600, rvu->rvu_dbg.mcs_rx, mcs,
   554					    &rvu_dbg_mcs_rx_port_stats_fops);
   555	
   556			rvu->rvu_dbg.mcs_tx = debugfs_create_dir("tx_stats", rvu->rvu_dbg.mcs);
   557	
   558			debugfs_create_file("flowid", 0600, rvu->rvu_dbg.mcs_tx, mcs,
   559					    &rvu_dbg_mcs_tx_flowid_stats_fops);
   560	
   561			debugfs_create_file("secy", 0600, rvu->rvu_dbg.mcs_tx, mcs,
   562					    &rvu_dbg_mcs_tx_secy_stats_fops);
   563	
   564			debugfs_create_file("sc", 0600, rvu->rvu_dbg.mcs_tx, mcs,
   565					    &rvu_dbg_mcs_tx_sc_stats_fops);
   566	
   567			debugfs_create_file("sa", 0600, rvu->rvu_dbg.mcs_tx, mcs,
   568					    &rvu_dbg_mcs_tx_sa_stats_fops);
   569	
   570			debugfs_create_file("port", 0600, rvu->rvu_dbg.mcs_tx, mcs,
   571					    &rvu_dbg_mcs_tx_port_stats_fops);
   572		}
   573	}
   574	

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