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charset=us-ascii Content-Disposition: inline X-Rspamd-Server: rspam02 X-Stat-Signature: bqtqmociwe5fxzkahgpedmk1rcssxngy X-Rspamd-Queue-Id: 59A791C0007 X-Rspam-User: X-HE-Tag: 1740959330-510902 X-HE-Meta: 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 HUJJho2n Hlnj2zp3P+moH1fwqbi7QZT7ic0pNBWkyR42mdUItKQBCunIIJfT5d62c5lVbhabReX1s3c2QiL13wazsZxpPOWQ2q1YF8gY042L2hIeZwCPR7cXlWO/GEvSTxfC0dOH3GO8M5f/VSb5kgztbyMSKbhYNHqTrHWMFSbPn/t66VLHyb5Xb44gpTrvy+rRVjp06vv6QkRh9wzqOH6MHCTuUe+XHpzBoek84SxcqsElJpxTS+H/TNOsoJnN4ZOGECA036R0AmRtjuqDi/pCzGqrh6CbSRNbzGAb6fnZbYHrRIvPM8PRW3ytq2fePhAsh8gaD63L3D1GwFaaikPBbZo4KsG0zHPQwhjA3zufpjDMMeYaY34D3HahmmX4tD7hIACx0xqIcHRpHLRmU6brcaolLTyNPVmAg5djRE+3YHbu9Raq98tvV6/xtAtM7gTSbBs8n+FlZixon5Ly4Bhw= 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 Ilya, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 7eb172143d5508b4da468ed59ee857c6e5e01da6 commit: 3a8f6f3b469b4075919a3613e182f9a70df92d46 kmsan: enable on s390 date: 8 months ago config: s390-randconfig-r122-20250303 (https://download.01.org/0day-ci/archive/20250303/202503030742.0cGEybrx-lkp@intel.com/config) compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90) reproduce: (https://download.01.org/0day-ci/archive/20250303/202503030742.0cGEybrx-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/202503030742.0cGEybrx-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