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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 , kernel@collabora.com, Cyrill Gorcunov , Mike Rapoport , Nadav Amit Subject: Re: [PATCH v30 2/6] fs/proc/task_mmu: Implement IOCTL to get and optionally clear info about PTEs Message-ID: <202308161737.upLWpu8Q-lkp@intel.com> References: <20230816065925.850879-3-usama.anjum@collabora.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230816065925.850879-3-usama.anjum@collabora.com> X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 32D5B40018 X-Stat-Signature: zutbfyygp8kz5whnwe7d1amm3x6ix5nr X-Rspam-User: X-HE-Tag: 1692177476-449458 X-HE-Meta: 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 Be7/ars/ K4ReBgo0xjQDgzqg3wrIW6t2OgxtjONN8ZZM9+K/KK4JadIfJvyXoYXygq+SYOHVpvd6PkFkymtXakYsL2k1bYE2CSrQ9ilcb/5ZXQJ53vSW4hZ/WszoFEZt6XsuyoGbqMv5bpqJp9ZCpLWYRtTNDUf1PQZOvV8qiAmvcnGkIbDbkWQ73mgIVc7dFHhvDPzvh6K3PvWgiCV4E9DMDh8G8lLyHKF40RM0RTa05DZ3rwiWUQ+gEAOliQlSLFxf4oTKzHS+5XuCy1PKc/hgXsVrHAfZ2RTC7iR3Csq85dHn5iYsKYf9AAAqGAPdHLHKHhyECHxTkjY5iTbtsV3jDyMZM1Nd0Q3mkdNNUdQV8Yr6V874hw1DaH4sUTyY5Mp9eM1PdeADOKCvTY5gft2OnmZhnSi1/gyL1gpzJDCziVMC6x5GX3IAqtC+09tzRbvhXv6Vr7usGaLAmKPaAL1d/Ts7i2b83z845tBQiZ37O 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 warnings: [auto build test WARNING on akpm-mm/mm-everything] [also build test WARNING on next-20230815] [cannot apply to linus/master v6.5-rc6] [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/20230816-150412 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20230816065925.850879-3-usama.anjum%40collabora.com patch subject: [PATCH v30 2/6] fs/proc/task_mmu: Implement IOCTL to get and optionally clear info about PTEs config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20230816/202308161737.upLWpu8Q-lkp@intel.com/config) compiler: m68k-linux-gcc (GCC) 12.3.0 reproduce: (https://download.01.org/0day-ci/archive/20230816/202308161737.upLWpu8Q-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/202308161737.upLWpu8Q-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from include/asm-generic/bug.h:5, from arch/m68k/include/asm/bug.h:32, from include/linux/bug.h:5, from include/linux/mmdebug.h:5, from include/linux/mm.h:6, from include/linux/pagewalk.h:5, from fs/proc/task_mmu.c:2: fs/proc/task_mmu.c: In function 'pagemap_scan_get_args': >> fs/proc/task_mmu.c:2269:24: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 2269 | if (!access_ok((void __user *)arg->start, arg->end - arg->start)) | ^ include/linux/compiler.h:76:45: note: in definition of macro 'likely' 76 | # define likely(x) __builtin_expect(!!(x), 1) | ^ fs/proc/task_mmu.c:2269:14: note: in expansion of macro 'access_ok' 2269 | if (!access_ok((void __user *)arg->start, arg->end - arg->start)) | ^~~~~~~~~ fs/proc/task_mmu.c:2273:36: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 2273 | if (arg->vec && !access_ok((void __user *)arg->vec, | ^ include/linux/compiler.h:76:45: note: in definition of macro 'likely' 76 | # define likely(x) __builtin_expect(!!(x), 1) | ^ fs/proc/task_mmu.c:2273:26: note: in expansion of macro 'access_ok' 2273 | if (arg->vec && !access_ok((void __user *)arg->vec, | ^~~~~~~~~ fs/proc/task_mmu.c: In function 'pagemap_scan_init_bounce_buffer': fs/proc/task_mmu.c:2310:22: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 2310 | p->vec_out = (struct page_region __user *)p->arg.vec; | ^ fs/proc/task_mmu.c: At top level: fs/proc/task_mmu.c:1998:13: warning: 'pagemap_scan_backout_range' defined but not used [-Wunused-function] 1998 | static void pagemap_scan_backout_range(struct pagemap_scan_private *p, | ^~~~~~~~~~~~~~~~~~~~~~~~~~ vim +2269 fs/proc/task_mmu.c 2245 2246 static int pagemap_scan_get_args(struct pm_scan_arg *arg, 2247 unsigned long uarg) 2248 { 2249 if (copy_from_user(arg, (void __user *)uarg, sizeof(*arg))) 2250 return -EFAULT; 2251 2252 if (arg->size != sizeof(struct pm_scan_arg)) 2253 return -EINVAL; 2254 2255 /* Validate requested features */ 2256 if (arg->flags & ~PM_SCAN_FLAGS) 2257 return -EINVAL; 2258 if ((arg->category_inverted | arg->category_mask | 2259 arg->category_anyof_mask | arg->return_mask) & ~PM_SCAN_CATEGORIES) 2260 return -EINVAL; 2261 2262 arg->start = untagged_addr((unsigned long)arg->start); 2263 arg->end = untagged_addr((unsigned long)arg->end); 2264 arg->vec = untagged_addr((unsigned long)arg->vec); 2265 2266 /* Validate memory pointers */ 2267 if (!IS_ALIGNED(arg->start, PAGE_SIZE)) 2268 return -EINVAL; > 2269 if (!access_ok((void __user *)arg->start, arg->end - arg->start)) 2270 return -EFAULT; 2271 if (!arg->vec && arg->vec_len) 2272 return -EINVAL; 2273 if (arg->vec && !access_ok((void __user *)arg->vec, 2274 arg->vec_len * sizeof(struct page_region))) 2275 return -EFAULT; 2276 2277 /* Fixup default values */ 2278 arg->end = ALIGN(arg->end, PAGE_SIZE); 2279 arg->walk_end = 0; 2280 if (!arg->max_pages) 2281 arg->max_pages = ULONG_MAX; 2282 2283 return 0; 2284 } 2285 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki