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Howlett" , Yun Zhou , Suren Baghdasaryan , Alex Sierra , Muhammad Usama Anjum , Matthew Wilcox , Pasha Tatashin , Axel Rasmussen , "Gustavo A . R . Silva" , Dan Williams , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kselftest@vger.kernel.org, Greg KH Subject: Re: [PATCH v15 2/5] fs/proc/task_mmu: Implement IOCTL to get and optionally clear info about PTEs Message-ID: <202304192224.WAXXv4Fk-lkp@intel.com> References: <20230419110716.4113627-3-usama.anjum@collabora.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230419110716.4113627-3-usama.anjum@collabora.com> X-Rspamd-Queue-Id: 6642040027 X-Stat-Signature: xx9kodo3kf49w7obju4gciifafer5j6d X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1681916553-931491 X-HE-Meta: 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 IiCx0DOi 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 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: Hi Muhammad, kernel test robot noticed the following build errors: [auto build test ERROR on next-20230418] [cannot apply to akpm-mm/mm-everything linus/master v6.3-rc7 v6.3-rc6 v6.3-rc5 v6.3-rc7] [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/Muhammad-Usama-Anjum/userfaultfd-UFFD_FEATURE_WP_ASYNC/20230419-190920 patch link: https://lore.kernel.org/r/20230419110716.4113627-3-usama.anjum%40collabora.com patch subject: [PATCH v15 2/5] fs/proc/task_mmu: Implement IOCTL to get and optionally clear info about PTEs config: i386-randconfig-a014-20230417 (https://download.01.org/0day-ci/archive/20230419/202304192224.WAXXv4Fk-lkp@intel.com/config) compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/intel-lab-lkp/linux/commit/b4a176ae0c875b07b49d2e3539699065438be9b1 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Muhammad-Usama-Anjum/userfaultfd-UFFD_FEATURE_WP_ASYNC/20230419-190920 git checkout b4a176ae0c875b07b49d2e3539699065438be9b1 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash fs/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot | Link: https://lore.kernel.org/oe-kbuild-all/202304192224.WAXXv4Fk-lkp@intel.com/ All errors (new ones prefixed by >>): >> fs/proc/task_mmu.c:2177:6: error: use of undeclared identifier 'vma' vma->vm_mm, start, end); ^ 1 error generated. vim +/vma +2177 fs/proc/task_mmu.c 2128 2129 static long do_pagemap_scan(struct mm_struct *mm, 2130 struct pm_scan_arg __user *uarg) 2131 { 2132 unsigned long start, end, walk_start, walk_end; 2133 unsigned long empty_slots, vec_index = 0; 2134 struct mmu_notifier_range range; 2135 struct page_region __user *vec; 2136 struct pagemap_scan_private p; 2137 struct pm_scan_arg arg; 2138 int ret = 0; 2139 2140 if (copy_from_user(&arg, uarg, sizeof(arg))) 2141 return -EFAULT; 2142 2143 start = untagged_addr((unsigned long)arg.start); 2144 vec = (struct page_region *)untagged_addr((unsigned long)arg.vec); 2145 2146 ret = pagemap_scan_args_valid(&arg, start, vec); 2147 if (ret) 2148 return ret; 2149 2150 end = start + arg.len; 2151 p.max_pages = arg.max_pages; 2152 p.found_pages = 0; 2153 p.flags = arg.flags; 2154 p.required_mask = arg.required_mask; 2155 p.anyof_mask = arg.anyof_mask; 2156 p.excluded_mask = arg.excluded_mask; 2157 p.return_mask = arg.return_mask; 2158 p.cur.len = 0; 2159 p.cur.start = 0; 2160 p.vec = NULL; 2161 p.vec_len = PAGEMAP_WALK_SIZE >> PAGE_SHIFT; 2162 2163 /* 2164 * Allocate smaller buffer to get output from inside the page walk 2165 * functions and walk page range in PAGEMAP_WALK_SIZE size chunks. As 2166 * we want to return output to user in compact form where no two 2167 * consecutive regions should be continuous and have the same flags. 2168 * So store the latest element in p.cur between different walks and 2169 * store the p.cur at the end of the walk to the user buffer. 2170 */ 2171 p.vec = kmalloc_array(p.vec_len, sizeof(*p.vec), GFP_KERNEL); 2172 if (!p.vec) 2173 return -ENOMEM; 2174 2175 if (p.flags & PM_SCAN_OP_WP) { 2176 mmu_notifier_range_init(&range, MMU_NOTIFY_PROTECTION_VMA, 0, > 2177 vma->vm_mm, start, end); 2178 mmu_notifier_invalidate_range_start(&range); 2179 } 2180 2181 walk_start = walk_end = start; 2182 while (walk_end < end && !ret) { 2183 p.vec_index = 0; 2184 2185 empty_slots = arg.vec_len - vec_index; 2186 p.vec_len = min(p.vec_len, empty_slots); 2187 2188 walk_end = (walk_start + PAGEMAP_WALK_SIZE) & PAGEMAP_WALK_MASK; 2189 if (walk_end > end) 2190 walk_end = end; 2191 2192 ret = mmap_read_lock_killable(mm); 2193 if (ret) 2194 goto free_data; 2195 ret = walk_page_range(mm, walk_start, walk_end, 2196 &pagemap_scan_ops, &p); 2197 mmap_read_unlock(mm); 2198 2199 if (ret && ret != -ENOSPC && ret != PM_SCAN_FOUND_MAX_PAGES) 2200 goto free_data; 2201 2202 walk_start = walk_end; 2203 if (p.vec_index) { 2204 if (copy_to_user(&vec[vec_index], p.vec, 2205 p.vec_index * sizeof(*p.vec))) { 2206 /* 2207 * Return error even though the OP succeeded 2208 */ 2209 ret = -EFAULT; 2210 goto free_data; 2211 } 2212 vec_index += p.vec_index; 2213 } 2214 } 2215 2216 if (p.flags & PM_SCAN_OP_WP) 2217 mmu_notifier_invalidate_range_end(&range); 2218 2219 if (p.cur.len) { 2220 if (copy_to_user(&vec[vec_index], &p.cur, sizeof(*p.vec))) { 2221 ret = -EFAULT; 2222 goto free_data; 2223 } 2224 vec_index++; 2225 } 2226 2227 ret = vec_index; 2228 2229 free_data: 2230 kfree(p.vec); 2231 return ret; 2232 } 2233 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests