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X-CSE-ConnectionGUID: Igs4w93qRgaL183PT1Ddgw== X-CSE-MsgGUID: ZSMuUSfBRU+nhBFOgkjn1w== X-IronPort-AV: E=McAfee;i="6800,10657,11527"; a="75450440" X-IronPort-AV: E=Sophos;i="6.17,306,1747724400"; d="scan'208";a="75450440" Received: from fmviesa004.fm.intel.com ([10.60.135.144]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Aug 2025 13:37:46 -0700 X-CSE-ConnectionGUID: Qx5SML5/Rcq4Dz+k+Q3cHA== X-CSE-MsgGUID: WmwMD/4fTSGku8VThrHu1w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.17,306,1747724400"; d="scan'208";a="173481976" Received: from lkp-server02.sh.intel.com (HELO 4ea60e6ab079) ([10.239.97.151]) by fmviesa004.fm.intel.com with ESMTP; 20 Aug 2025 13:37:39 -0700 Received: from kbuild by 4ea60e6ab079 with local (Exim 4.96) (envelope-from ) id 1uopYu-000JfX-35; Wed, 20 Aug 2025 20:37:36 +0000 Date: Thu, 21 Aug 2025 04:36:46 +0800 From: kernel test robot To: Anthony Yznaga , linux-mm@kvack.org Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, akpm@linux-foundation.org, andreyknvl@gmail.com, arnd@arndb.de, bp@alien8.de, brauner@kernel.org, bsegall@google.com, corbet@lwn.net, dave.hansen@linux.intel.com, david@redhat.com, dietmar.eggemann@arm.com, ebiederm@xmission.com, hpa@zytor.com, jakub.wartak@mailbox.org, jannh@google.com, juri.lelli@redhat.com, khalid@kernel.org, liam.howlett@oracle.com, linyongting@bytedance.com, lorenzo.stoakes@oracle.com, luto@kernel.org, markhemm@googlemail.com, maz@kernel.org, mhiramat@kernel.org, mgorman@suse.de, mhocko@suse.com, mingo@redhat.com, muchun.song@linux.dev, neilb@suse.de, osalvador@suse.de Subject: Re: [PATCH v3 18/22] mm/mshare: Add an ioctl for mapping objects in an mshare region Message-ID: <202508210437.BXbf4eok-lkp@intel.com> References: <20250820010415.699353-19-anthony.yznaga@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250820010415.699353-19-anthony.yznaga@oracle.com> X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 47204140015 X-Stat-Signature: fugtxji4r75ukou6hoessg4jq8ahoaz9 X-Rspam-User: X-HE-Tag: 1755722268-545570 X-HE-Meta: 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 RZuxRZt4 ThGZvIDrI5kLvGE/pHFPjGx+Am1mtla1QPTySs3uA3DHjHDFI1ee2/tF4G8OTOQ7rOZAiK2tnpUus6bS/urP2qf7qbG9WVNI1WJ9upi2UFz1XJnm1H8JK/7v/NMpS2eYmyfNFZM2SP1YM5Pl9qvDwynufEHWkNfYb6Jt292ik7PA6wnjCF8yWpacDShkEi0ROUmr1iz/+RZKyvXdPMZ7T8dUCwjUP6tJswWRlPObNvi3o1IQ/X94N7fnaMEW8h4AWBVKmIDYYUerm/Us89SjdUYZfvybNWWksr+mCbJm3nwps0PTNSlQqv1EZ4Zgb742CkY0Eh3SYQO7kcKbM8GLvpBH2OAjEyaAFDYzWa5+7sfc8JUBm+StH6puhNw== 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 Anthony, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] [also build test WARNING on next-20250820] [cannot apply to tip/sched/core trace/for-next tip/x86/core tip/x86/mm kees/for-next/execve linus/master v6.17-rc2] [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/Anthony-Yznaga/mm-Add-msharefs-filesystem/20250820-091021 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20250820010415.699353-19-anthony.yznaga%40oracle.com patch subject: [PATCH v3 18/22] mm/mshare: Add an ioctl for mapping objects in an mshare region config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20250821/202508210437.BXbf4eok-lkp@intel.com/config) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250821/202508210437.BXbf4eok-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/202508210437.BXbf4eok-lkp@intel.com/ All warnings (new ones prefixed by >>): mm/mshare.c:305:16: warning: variable 'mshare_start' set but not used [-Wunused-but-set-variable] 305 | unsigned long mshare_start, mshare_size; | ^ >> mm/mshare.c:386:57: warning: variable 'vm_flags' is uninitialized when used here [-Wuninitialized] 386 | mapped_addr = __do_mmap(NULL, addr, size, prot, flags, vm_flags, | ^~~~~~~~ mm/mshare.c:361:21: note: initialize the variable 'vm_flags' to silence this warning 361 | vm_flags_t vm_flags; | ^ | = 0 2 warnings generated. vim +/vm_flags +386 mm/mshare.c 297 298 static unsigned long 299 msharefs_get_unmapped_area(struct file *file, unsigned long addr, 300 unsigned long len, unsigned long pgoff, unsigned long flags) 301 { 302 struct mshare_data *m_data = file->private_data; 303 struct mm_struct *mm = current->mm; 304 struct vm_area_struct *vma, *prev; > 305 unsigned long mshare_start, mshare_size; 306 const unsigned long mmap_end = arch_get_mmap_end(addr, len, flags); 307 308 mmap_assert_write_locked(mm); 309 310 if ((flags & MAP_TYPE) == MAP_PRIVATE) 311 return -EINVAL; 312 313 if (!mshare_is_initialized(m_data) || !mshare_has_owner(m_data)) 314 return -EINVAL; 315 316 mshare_start = m_data->start; 317 mshare_size = m_data->size; 318 319 if (len != mshare_size) 320 return -EINVAL; 321 322 if (len > mmap_end - mmap_min_addr) 323 return -ENOMEM; 324 325 if (flags & MAP_FIXED) { 326 if (!IS_ALIGNED(addr, mshare_align)) 327 return -EINVAL; 328 return addr; 329 } 330 331 if (addr) { 332 addr = ALIGN(addr, mshare_align); 333 vma = find_vma_prev(mm, addr, &prev); 334 if (mmap_end - len >= addr && addr >= mmap_min_addr && 335 (!vma || addr + len <= vm_start_gap(vma)) && 336 (!prev || addr >= vm_end_gap(prev))) 337 return addr; 338 } 339 340 if (!mm_flags_test(MMF_TOPDOWN, mm)) 341 return msharefs_get_unmapped_area_bottomup(file, addr, len, 342 pgoff, flags); 343 else 344 return msharefs_get_unmapped_area_topdown(file, addr, len, 345 pgoff, flags); 346 } 347 348 static long 349 msharefs_create_mapping(struct mshare_data *m_data, struct mshare_create *mcreate) 350 { 351 struct mm_struct *host_mm = m_data->mm; 352 unsigned long mshare_start, mshare_end; 353 unsigned long region_offset = mcreate->region_offset; 354 unsigned long size = mcreate->size; 355 unsigned int fd = mcreate->fd; 356 int flags = mcreate->flags; 357 int prot = mcreate->prot; 358 unsigned long populate = 0; 359 unsigned long mapped_addr; 360 unsigned long addr; 361 vm_flags_t vm_flags; 362 int error = -EINVAL; 363 364 mshare_start = m_data->start; 365 mshare_end = mshare_start + m_data->size; 366 addr = mshare_start + region_offset; 367 368 if ((addr < mshare_start) || (addr >= mshare_end) || 369 (addr + size > mshare_end)) 370 goto out; 371 372 /* 373 * Only anonymous shared memory at fixed addresses is allowed for now. 374 */ 375 if ((flags & (MAP_SHARED | MAP_FIXED)) != (MAP_SHARED | MAP_FIXED)) 376 goto out; 377 if (fd != -1) 378 goto out; 379 380 if (mmap_write_lock_killable(host_mm)) { 381 error = -EINTR; 382 goto out; 383 } 384 385 error = 0; > 386 mapped_addr = __do_mmap(NULL, addr, size, prot, flags, vm_flags, 387 0, &populate, NULL, host_mm); 388 389 if (IS_ERR_VALUE(mapped_addr)) 390 error = (long)mapped_addr; 391 392 mmap_write_unlock(host_mm); 393 out: 394 return error; 395 } 396 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki