From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DB21D2FE3D for ; Sat, 25 Nov 2023 20:00:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="kDtNFE6l" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1700942453; x=1732478453; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=mpJPZbnlB++0pfKcK61vyQxNXtYXyj1Pv2g2mZivN6w=; b=kDtNFE6l6FOUUIeoEKsgWMgnvm0EelF7f6OIFa7ihsqjd75yCDQPQ0Zi Wo1MsFUrhdfvkh83/kvQaO1AIPyr7uIzhFuODG/xmSuFawey2JeUDsl0X 6SaJbvGQ6SPK6Y91b84V2wjhYhzYlIi5+emH4AmRkSIb2jdfePDb6JzER gsgfJmtqgP0OamKA4SxtU/FQakb5h+NEomnMBMHWC12gNjFf4udXMsac7 O35glkekNgkqmxskLd1oA7VdIABa3Z4EE46nDBsIIAwo1DBnlFzjgRa5g UyURGrD/Yc6SjWJDF2L5ge2XrJEv0P9nvCo5UqmWboIZTfwEg2Y0X5Bf6 g==; X-IronPort-AV: E=McAfee;i="6600,9927,10905"; a="391398665" X-IronPort-AV: E=Sophos;i="6.04,227,1695711600"; d="scan'208";a="391398665" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Nov 2023 12:00:50 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10905"; a="891332352" X-IronPort-AV: E=Sophos;i="6.04,227,1695711600"; d="scan'208";a="891332352" Received: from lkp-server01.sh.intel.com (HELO d584ee6ebdcc) ([10.239.97.150]) by orsmga004.jf.intel.com with ESMTP; 25 Nov 2023 12:00:46 -0800 Received: from kbuild by d584ee6ebdcc with local (Exim 4.96) (envelope-from ) id 1r6ypY-0004Me-0y; Sat, 25 Nov 2023 20:00:44 +0000 Date: Sun, 26 Nov 2023 04:00:31 +0800 From: kernel test robot To: Rong Tao , Andrew Morton , Catalin Marinas , Florent Revest , Kees Cook , David Hildenbrand , Stefan Roesch , Andy Chiu , Josh Triplett , Joey Gouly , Oleg Nesterov , Miguel Ojeda , Ondrej Mosnacek , linux-kernel@vger.kernel.org Cc: oe-kbuild-all@lists.linux.dev, Linux Memory Management List , rtoax@foxmail.com, rongtao@cestc.cn Subject: Re: [PATCH] prctl: Get private anonymous memory region name Message-ID: <202311260314.iuUprWJb-lkp@intel.com> References: Precedence: bulk X-Mailing-List: oe-kbuild-all@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Hi Rong, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] [also build test WARNING on linus/master v6.7-rc2 next-20231124] [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/Rong-Tao/prctl-Get-private-anonymous-memory-region-name/20231125-220925 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/tencent_977CBF8E8CA6234A1B740A35655D5D7EAA0A%40qq.com patch subject: [PATCH] prctl: Get private anonymous memory region name config: s390-allmodconfig (https://download.01.org/0day-ci/archive/20231126/202311260314.iuUprWJb-lkp@intel.com/config) compiler: s390-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231126/202311260314.iuUprWJb-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/202311260314.iuUprWJb-lkp@intel.com/ All warnings (new ones prefixed by >>): kernel/sys.c: In function 'prctl_get_vma': >> kernel/sys.c:2389:35: warning: passing argument 1 of 'anon_vma_name_put' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] 2389 | anon_vma_name_put(anon_name); | ^~~~~~~~~ In file included from kernel/sys.c:10: include/linux/mm_inline.h:363:60: note: expected 'struct anon_vma_name *' but argument is of type 'const struct anon_vma_name *' 363 | static inline void anon_vma_name_put(struct anon_vma_name *anon_name) | ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~ vim +2389 kernel/sys.c 2361 2362 static int prctl_get_vma(unsigned long opt, unsigned long addr, 2363 unsigned long buf, unsigned long arg) 2364 { 2365 struct mm_struct *mm = current->mm; 2366 const char __user *u_buf; 2367 int error; 2368 2369 switch (opt) { 2370 case PR_GET_VMA_ANON_NAME: 2371 const struct anon_vma_name *anon_name = NULL; 2372 2373 u_buf = (const char __user *)buf; 2374 error = 0; 2375 2376 mmap_read_lock(mm); 2377 anon_name = madvise_get_anon_name(mm, addr); 2378 if (!anon_name) { 2379 mmap_read_unlock(mm); 2380 error = -EFAULT; 2381 break; 2382 } 2383 2384 if (copy_to_user((char __user *)u_buf, anon_name->name, 2385 strlen(anon_name->name) + 1)) 2386 error = -EFAULT; 2387 2388 mmap_read_unlock(mm); > 2389 anon_vma_name_put(anon_name); 2390 break; 2391 default: 2392 error = -EINVAL; 2393 } 2394 return error; 2395 } 2396 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki