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charset=us-ascii Content-Disposition: inline X-Rspam-User: X-Rspamd-Queue-Id: 10C0F20002 X-Rspamd-Server: rspam06 X-Stat-Signature: qqo6dgwptna4kow3wee1cd1k7i7676u3 X-HE-Tag: 1753840969-688408 X-HE-Meta: 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 xy8f5NsY tgzGAjGXfLVdNNDH/c7307ZDMp2WdoczXliHplLzWUEl63QVNUUimYkhTJ0l0WUJFNc4JONfLFjLT492k/TVHi0CUT7wpQZrNyDdT2ur1wWabGTI1eJjX+HWhl0DTwoD0pNMV2G1brbpkEJCxI11X9IT37GUmqBy8oIwTVncQQkf+3YeUGEd/3ihl5fFQNZxvVqIy3qngdJZzE0rxYXkPfHY9gbpOvbfT5gvT9MXqrsoJMVlk0WFakM2f0KppM2FHh9rTFTF7S2EAeqDgYIM5hE2ZZztKyz6bSJGIW04uN1R91jru4ROJ4BXExjg3kEsZ1kXDrsUc0et/IGJaZ0p20pPS3bj+rNpT1nIbbmcjS/sUUBaGv/+Ax1AnrvCCNyTOffNDLQu+nq9L82gsi4/3RrhyEptVOSwMlCts 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: tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 14bed9bc81bae64db98349319f367bfc7dab0afd commit: 3a8f6f3b469b4075919a3613e182f9a70df92d46 kmsan: enable on s390 date: 1 year, 1 month ago config: s390-randconfig-r111-20250730 (https://download.01.org/0day-ci/archive/20250730/202507300944.NePjNXZ2-lkp@intel.com/config) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project bcd0d972247154336dd1321f1fded818e46671d1) reproduce: (https://download.01.org/0day-ci/archive/20250730/202507300944.NePjNXZ2-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/202507300944.NePjNXZ2-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) >> mm/kmsan/hooks.c:269:14: sparse: sparse: cast removes address space '__user' of expression mm/kmsan/hooks.c:271:75: sparse: sparse: incorrect type in argument 3 (different address spaces) @@ expected void const *user_addr @@ got void [noderef] __user *to @@ mm/kmsan/hooks.c:271:75: sparse: expected void const *user_addr mm/kmsan/hooks.c:271:75: sparse: got void [noderef] __user *to mm/kmsan/hooks.c:280:50: sparse: sparse: cast removes address space '__user' of expression mm/kmsan/hooks.c:306:59: sparse: sparse: Using plain integer as NULL pointer mm/kmsan/hooks.c:319:79: sparse: sparse: Using plain integer as NULL pointer mm/kmsan/hooks.c:325:79: sparse: sparse: Using plain integer as NULL pointer mm/kmsan/hooks.c:421:78: sparse: sparse: Using plain integer as NULL pointer vim +/__user +269 mm/kmsan/hooks.c b073d7f8aee4eb Alexander Potapenko 2022-09-15 247 75cf0290271bf6 Alexander Potapenko 2022-09-15 248 void kmsan_copy_to_user(void __user *to, const void *from, size_t to_copy, 75cf0290271bf6 Alexander Potapenko 2022-09-15 249 size_t left) 75cf0290271bf6 Alexander Potapenko 2022-09-15 250 { 75cf0290271bf6 Alexander Potapenko 2022-09-15 251 unsigned long ua_flags; 75cf0290271bf6 Alexander Potapenko 2022-09-15 252 75cf0290271bf6 Alexander Potapenko 2022-09-15 253 if (!kmsan_enabled || kmsan_in_runtime()) 75cf0290271bf6 Alexander Potapenko 2022-09-15 254 return; 75cf0290271bf6 Alexander Potapenko 2022-09-15 255 /* 75cf0290271bf6 Alexander Potapenko 2022-09-15 256 * At this point we've copied the memory already. It's hard to check it 75cf0290271bf6 Alexander Potapenko 2022-09-15 257 * before copying, as the size of actually copied buffer is unknown. 75cf0290271bf6 Alexander Potapenko 2022-09-15 258 */ 75cf0290271bf6 Alexander Potapenko 2022-09-15 259 75cf0290271bf6 Alexander Potapenko 2022-09-15 260 /* copy_to_user() may copy zero bytes. No need to check. */ 75cf0290271bf6 Alexander Potapenko 2022-09-15 261 if (!to_copy) 75cf0290271bf6 Alexander Potapenko 2022-09-15 262 return; 75cf0290271bf6 Alexander Potapenko 2022-09-15 263 /* Or maybe copy_to_user() failed to copy anything. */ 75cf0290271bf6 Alexander Potapenko 2022-09-15 264 if (to_copy <= left) 75cf0290271bf6 Alexander Potapenko 2022-09-15 265 return; 75cf0290271bf6 Alexander Potapenko 2022-09-15 266 75cf0290271bf6 Alexander Potapenko 2022-09-15 267 ua_flags = user_access_save(); f926e9326f3a79 Ilya Leoshkevich 2024-06-21 268 if (!IS_ENABLED(CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE) || f926e9326f3a79 Ilya Leoshkevich 2024-06-21 @269 (u64)to < TASK_SIZE) { 75cf0290271bf6 Alexander Potapenko 2022-09-15 270 /* This is a user memory access, check it. */ 75cf0290271bf6 Alexander Potapenko 2022-09-15 271 kmsan_internal_check_memory((void *)from, to_copy - left, to, 75cf0290271bf6 Alexander Potapenko 2022-09-15 272 REASON_COPY_TO_USER); 75cf0290271bf6 Alexander Potapenko 2022-09-15 273 } else { 75cf0290271bf6 Alexander Potapenko 2022-09-15 274 /* Otherwise this is a kernel memory access. This happens when a 75cf0290271bf6 Alexander Potapenko 2022-09-15 275 * compat syscall passes an argument allocated on the kernel 75cf0290271bf6 Alexander Potapenko 2022-09-15 276 * stack to a real syscall. 75cf0290271bf6 Alexander Potapenko 2022-09-15 277 * Don't check anything, just copy the shadow of the copied 75cf0290271bf6 Alexander Potapenko 2022-09-15 278 * bytes. 75cf0290271bf6 Alexander Potapenko 2022-09-15 279 */ 75cf0290271bf6 Alexander Potapenko 2022-09-15 280 kmsan_internal_memmove_metadata((void *)to, (void *)from, 75cf0290271bf6 Alexander Potapenko 2022-09-15 281 to_copy - left); 75cf0290271bf6 Alexander Potapenko 2022-09-15 282 } 75cf0290271bf6 Alexander Potapenko 2022-09-15 283 user_access_restore(ua_flags); 75cf0290271bf6 Alexander Potapenko 2022-09-15 284 } 75cf0290271bf6 Alexander Potapenko 2022-09-15 285 EXPORT_SYMBOL(kmsan_copy_to_user); 75cf0290271bf6 Alexander Potapenko 2022-09-15 286 :::::: The code at line 269 was first introduced by commit :::::: f926e9326f3a79f7e01ac790e2361f44d8ca8320 kmsan: fix kmsan_copy_to_user() on arches with overlapping address spaces :::::: TO: Ilya Leoshkevich :::::: CC: Andrew Morton -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki