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X-CSE-ConnectionGUID: LWtdCWHeSsKF1lI3JpRp2Q== X-CSE-MsgGUID: 3Zo/+c2bQ0qDMA2NlgFg/w== X-IronPort-AV: E=McAfee;i="6800,10657,11661"; a="86563802" X-IronPort-AV: E=Sophos;i="6.21,203,1763452800"; d="scan'208";a="86563802" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Jan 2026 03:23:37 -0800 X-CSE-ConnectionGUID: r4sne9ufRJ+k+UH6JJk2SA== X-CSE-MsgGUID: ZM98H0AFRgCInyALlxxdDw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,203,1763452800"; d="scan'208";a="233064206" Received: from lkp-server01.sh.intel.com (HELO 765f4a05e27f) ([10.239.97.150]) by orviesa002.jf.intel.com with ESMTP; 05 Jan 2026 03:23:35 -0800 Received: from kbuild by 765f4a05e27f with local (Exim 4.98.2) (envelope-from ) id 1vcigO-00000000177-0Lic; Mon, 05 Jan 2026 11:23:32 +0000 Date: Mon, 05 Jan 2026 19:23:10 +0800 From: kernel test robot To: Simon Horman Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Jakub Kicinski , Vadim Fedorenko Subject: drivers/net/ethernet/marvell/octeontx2/af/cgx.c:1737:35: warning: '%u' directive writing between 1 and 10 bytes into a region of size between 4 and 6 Message-ID: <202601051934.eKIAeUYY-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: oe-kbuild-all@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Hi Simon, FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 3609fa95fb0f2c1b099e69e56634edb8fc03f87c commit: 9312ee76490df61491fee19b5ce71f71b6de908c octeontx2-af: use unsigned int as iterator for unsigned values date: 5 months ago config: arm64-randconfig-001-20260105 (https://download.01.org/0day-ci/archive/20260105/202601051934.eKIAeUYY-lkp@intel.com/config) compiler: aarch64-linux-gcc (GCC) 9.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260105/202601051934.eKIAeUYY-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 | Closes: https://lore.kernel.org/oe-kbuild-all/202601051934.eKIAeUYY-lkp@intel.com/ All warnings (new ones prefixed by >>): drivers/net/ethernet/marvell/octeontx2/af/cgx.c: In function 'cgx_lmac_init': >> drivers/net/ethernet/marvell/octeontx2/af/cgx.c:1737:35: warning: '%u' directive writing between 1 and 10 bytes into a region of size between 4 and 6 [-Wformat-overflow=] 1737 | sprintf(lmac->name, "cgx_fwi_%u_%u", cgx->cgx_id, i); | ^~ drivers/net/ethernet/marvell/octeontx2/af/cgx.c:1737:23: note: directive argument in the range [0, 4294967294] 1737 | sprintf(lmac->name, "cgx_fwi_%u_%u", cgx->cgx_id, i); | ^~~~~~~~~~~~~~~ drivers/net/ethernet/marvell/octeontx2/af/cgx.c:1737:3: note: 'sprintf' output between 12 and 23 bytes into a destination of size 16 1737 | sprintf(lmac->name, "cgx_fwi_%u_%u", cgx->cgx_id, i); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +1737 drivers/net/ethernet/marvell/octeontx2/af/cgx.c 1704 1705 static int cgx_lmac_init(struct cgx *cgx) 1706 { 1707 u8 max_dmac_filters; 1708 struct lmac *lmac; 1709 int err, filter; 1710 unsigned int i; 1711 u64 lmac_list; 1712 1713 /* lmac_list specifies which lmacs are enabled 1714 * when bit n is set to 1, LMAC[n] is enabled 1715 */ 1716 if (cgx->mac_ops->non_contiguous_serdes_lane) { 1717 if (is_dev_rpm2(cgx)) 1718 lmac_list = 1719 cgx_read(cgx, 0, RPM2_CMRX_RX_LMACS) & 0xFFULL; 1720 else 1721 lmac_list = 1722 cgx_read(cgx, 0, CGXX_CMRX_RX_LMACS) & 0xFULL; 1723 } 1724 1725 if (cgx->lmac_count > cgx->max_lmac_per_mac) 1726 cgx->lmac_count = cgx->max_lmac_per_mac; 1727 1728 for (i = 0; i < cgx->lmac_count; i++) { 1729 lmac = kzalloc(sizeof(struct lmac), GFP_KERNEL); 1730 if (!lmac) 1731 return -ENOMEM; 1732 lmac->name = kcalloc(1, sizeof("cgx_fwi_xxx_yyy"), GFP_KERNEL); 1733 if (!lmac->name) { 1734 err = -ENOMEM; 1735 goto err_lmac_free; 1736 } > 1737 sprintf(lmac->name, "cgx_fwi_%u_%u", cgx->cgx_id, i); 1738 if (cgx->mac_ops->non_contiguous_serdes_lane) { 1739 lmac->lmac_id = __ffs64(lmac_list); 1740 lmac_list &= ~BIT_ULL(lmac->lmac_id); 1741 } else { 1742 lmac->lmac_id = i; 1743 } 1744 1745 lmac->cgx = cgx; 1746 lmac->mac_to_index_bmap.max = 1747 cgx->mac_ops->dmac_filter_count / 1748 cgx->lmac_count; 1749 1750 max_dmac_filters = lmac->mac_to_index_bmap.max; 1751 1752 err = rvu_alloc_bitmap(&lmac->mac_to_index_bmap); 1753 if (err) 1754 goto err_name_free; 1755 1756 /* Reserve first entry for default MAC address */ 1757 set_bit(0, lmac->mac_to_index_bmap.bmap); 1758 1759 lmac->rx_fc_pfvf_bmap.max = 128; 1760 err = rvu_alloc_bitmap(&lmac->rx_fc_pfvf_bmap); 1761 if (err) 1762 goto err_dmac_bmap_free; 1763 1764 lmac->tx_fc_pfvf_bmap.max = 128; 1765 err = rvu_alloc_bitmap(&lmac->tx_fc_pfvf_bmap); 1766 if (err) 1767 goto err_rx_fc_bmap_free; 1768 1769 init_waitqueue_head(&lmac->wq_cmd_cmplt); 1770 mutex_init(&lmac->cmd_lock); 1771 spin_lock_init(&lmac->event_cb_lock); 1772 err = cgx_configure_interrupt(cgx, lmac, lmac->lmac_id, false); 1773 if (err) 1774 goto err_bitmap_free; 1775 1776 /* Add reference */ 1777 cgx->lmac_idmap[lmac->lmac_id] = lmac; 1778 set_bit(lmac->lmac_id, &cgx->lmac_bmap); 1779 cgx->mac_ops->mac_pause_frm_config(cgx, lmac->lmac_id, true); 1780 lmac->lmac_type = cgx->mac_ops->get_lmac_type(cgx, lmac->lmac_id); 1781 1782 /* Disable stale DMAC filters for sane state */ 1783 for (filter = 0; filter < max_dmac_filters; filter++) 1784 cgx_lmac_addr_del(cgx->cgx_id, lmac->lmac_id, filter); 1785 1786 /* As cgx_lmac_addr_del does not clear entry for index 0 1787 * so it needs to be done explicitly 1788 */ 1789 cgx_lmac_addr_reset(cgx->cgx_id, lmac->lmac_id); 1790 } 1791 1792 /* Start X2P reset on given MAC block */ 1793 cgx->mac_ops->mac_x2p_reset(cgx, true); 1794 return cgx_lmac_verify_fwi_version(cgx); 1795 1796 err_bitmap_free: 1797 rvu_free_bitmap(&lmac->tx_fc_pfvf_bmap); 1798 err_rx_fc_bmap_free: 1799 rvu_free_bitmap(&lmac->rx_fc_pfvf_bmap); 1800 err_dmac_bmap_free: 1801 rvu_free_bitmap(&lmac->mac_to_index_bmap); 1802 err_name_free: 1803 kfree(lmac->name); 1804 err_lmac_free: 1805 kfree(lmac); 1806 return err; 1807 } 1808 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki