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X-CSE-ConnectionGUID: AwalfB0RTae9V/IS39b6xQ== X-CSE-MsgGUID: 5bw1Q/6zQpSnKWHABkiFhA== X-IronPort-AV: E=McAfee;i="6800,10657,11649"; a="68090341" X-IronPort-AV: E=Sophos;i="6.21,166,1763452800"; d="scan'208";a="68090341" Received: from orviesa009.jf.intel.com ([10.64.159.149]) by fmvoesa111.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Dec 2025 07:24:27 -0800 X-CSE-ConnectionGUID: 1QXVgw98R16pKnFnskNSOQ== X-CSE-MsgGUID: A4+GiOkUQ6ijLCK6CX4WFg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,166,1763452800"; d="scan'208";a="199070358" Received: from lkp-server01.sh.intel.com (HELO 0d09efa1b85f) ([10.239.97.150]) by orviesa009.jf.intel.com with ESMTP; 21 Dec 2025 07:24:24 -0800 Received: from kbuild by 0d09efa1b85f with local (Exim 4.98.2) (envelope-from ) id 1vXLIE-000000005mn-0efw; Sun, 21 Dec 2025 15:24:22 +0000 Date: Sun, 21 Dec 2025 23:23:57 +0800 From: kernel test robot To: Xiu Jianfeng Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Andrew Morton , Linux Memory Management List Subject: mm/hugetlb_cgroup.c:829:44: warning: '%s' directive output may be truncated writing up to 1623 bytes into a region of size between 32 and 63 Message-ID: <202512212332.9lFRbgdS-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Rspam-User: X-Rspamd-Queue-Id: 3B37BA000B X-Rspamd-Server: rspam10 X-Stat-Signature: 4rgc478qr5bhbm9x9nkfzb5j4zeq9w74 X-HE-Tag: 1766330668-879927 X-HE-Meta: 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 7tDRBVQz rE0s1NZ93i0oq6Amw0BmvZ09QmNBIcbzQBSiW42FFL1NA79EavsPi0mnicDKtOgaVWStelcEdvN1csmf31aJiXvWANuGPOsDdn3G3hDNEOkjXHk8dN9eJptAJ8SnAZ9ukdBrsJaSDJ/yB3uy8Ue+5if5bQShDCQjqyhkC5YfFDpqhFs/oM7hrNPwpCt42t1qT3ItuCrkASSlN687yr8YfYYz+ZGbt/0C/K34s8otFTX+Q9Idksj+YAnYZT/EOj5FRtdeQiVfSiRgbIwcFTQ3/kuFw8rW+E2wQHFR5CyyxKHdouo9biAows5ZWGp1azqsHHXqtIFPYPrCUWhYP3u+776L208oyQ3A/8kPm3+ros6jJYEFWn5ZjP19syYGWZErasL4tnkJ01kT88BE4VS+60O1zrg== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Xiu, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 9094662f6707d1d4b53d18baba459604e8bb0783 commit: 47179fe03588caa13a9bae642b058901709ddc55 mm/hugetlb_cgroup: prepare cftypes based on template date: 1 year, 6 months ago config: s390-randconfig-001-20251220 (https://download.01.org/0day-ci/archive/20251221/202512212332.9lFRbgdS-lkp@intel.com/config) compiler: s390-linux-gcc (GCC) 10.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251221/202512212332.9lFRbgdS-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/202512212332.9lFRbgdS-lkp@intel.com/ All warnings (new ones prefixed by >>): mm/hugetlb_cgroup.c: In function 'hugetlb_cgroup_file_init': >> mm/hugetlb_cgroup.c:829:44: warning: '%s' directive output may be truncated writing up to 1623 bytes into a region of size between 32 and 63 [-Wformat-truncation=] 829 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.%s", buf, tmpl->name); | ^~ mm/hugetlb_cgroup.c:829:3: note: 'snprintf' output between 2 and 1656 bytes into a destination of size 64 829 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.%s", buf, tmpl->name); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ mm/hugetlb_cgroup.c:829:44: warning: '%s' directive output may be truncated writing up to 2087 bytes into a region of size between 32 and 63 [-Wformat-truncation=] 829 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.%s", buf, tmpl->name); | ^~ mm/hugetlb_cgroup.c:829:3: note: 'snprintf' output between 2 and 2120 bytes into a destination of size 64 829 | snprintf(cft->name, MAX_CFTYPE_NAME, "%s.%s", buf, tmpl->name); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +829 mm/hugetlb_cgroup.c 815 816 static void __init 817 hugetlb_cgroup_cfttypes_init(struct hstate *h, struct cftype *cft, 818 struct cftype *tmpl, int tmpl_size) 819 { 820 char buf[32]; 821 int i, idx = hstate_index(h); 822 823 /* format the size */ 824 mem_fmt(buf, sizeof(buf), huge_page_size(h)); 825 826 for (i = 0; i < tmpl_size; cft++, tmpl++, i++) { 827 *cft = *tmpl; 828 /* rebuild the name */ > 829 snprintf(cft->name, MAX_CFTYPE_NAME, "%s.%s", buf, tmpl->name); 830 /* rebuild the private */ 831 cft->private = MEMFILE_PRIVATE(idx, tmpl->private); 832 /* rebuild the file_offset */ 833 if (tmpl->file_offset) { 834 unsigned int offset = tmpl->file_offset; 835 836 cft->file_offset = MEMFILE_OFFSET0(offset) + 837 MEMFILE_FIELD_SIZE(offset) * idx; 838 } 839 840 lockdep_register_key(&cft->lockdep_key); 841 } 842 } 843 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki