From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.13]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DED5EE573 for ; Sat, 6 Jan 2024 19:47:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="WXypUmHN" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1704570444; x=1736106444; h=date:from:to:cc:subject:message-id:mime-version; bh=mnFIl0dvqXooO299Hp/kM9Igogj5TlXsxdN7Rzfe+4w=; b=WXypUmHNcXyxe7omDbgfbe8mzC6ZlVI4lV7orJuFadpMXbDZCrrapiLJ 7v50tVz4aeDj3LMzzn+ytCjXlRHQrBaRtxGNTmaSOQ5o+QIUO+mKrO4y6 ZDxam63RBDeIN74a3GChe1fGTP5HGtT1Dm0rmvfvD/kQ74YbsK/aQIrB6 Ws5aNAqamRT3YbCIOzGbyl6UKy3LCHjTgTwK2XlNCnIAGUJxP+hdPqPk+ 34bjPOAVil8Uq8KgGeKNl8uQhHorNUKNvL3VfCHYcmh02Wes+khR+tBGo UEWMvb9j7hVEoC1Hr7+Zq90teLJRwvtDbZikrfzl4kf7bxieQhrx7Sqed A==; X-IronPort-AV: E=McAfee;i="6600,9927,10945"; a="4769632" X-IronPort-AV: E=Sophos;i="6.04,337,1695711600"; d="scan'208";a="4769632" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Jan 2024 11:47:23 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10945"; a="924502792" X-IronPort-AV: E=Sophos;i="6.04,337,1695711600"; d="scan'208";a="924502792" Received: from lkp-server02.sh.intel.com (HELO b07ab15da5fe) ([10.239.97.151]) by fmsmga001.fm.intel.com with ESMTP; 06 Jan 2024 11:47:21 -0800 Received: from kbuild by b07ab15da5fe with local (Exim 4.96) (envelope-from ) id 1rMCdb-0002wO-12; Sat, 06 Jan 2024 19:47:19 +0000 Date: Sun, 7 Jan 2024 03:47:08 +0800 From: kernel test robot To: Rick Edgecombe Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Dave Hansen , Yu-cheng Yu , "Borislav Petkov (AMD)" , Kees Cook Subject: arch/x86/kernel/shstk.c:295:55: sparse: sparse: cast removes address space '__user' of expression Message-ID: <202401070321.axBUxYMQ-lkp@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 95c8a35f1c017327eab3b6a2ff5c04255737c856 commit: 05e36022c0543ba55a3de55af455b00cb3eb4fcc x86/shstk: Handle signals for shadow stack date: 5 months ago config: x86_64-randconfig-123-20240106 (https://download.01.org/0day-ci/archive/20240107/202401070321.axBUxYMQ-lkp@intel.com/config) compiler: ClangBuiltLinux clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240107/202401070321.axBUxYMQ-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/202401070321.axBUxYMQ-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) arch/x86/kernel/shstk.c:244:29: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected unsigned long long [noderef] [usertype] __user *addr @@ got void *[noderef] __user @@ arch/x86/kernel/shstk.c:244:29: sparse: expected unsigned long long [noderef] [usertype] __user *addr arch/x86/kernel/shstk.c:244:29: sparse: got void *[noderef] __user >> arch/x86/kernel/shstk.c:295:55: sparse: sparse: cast removes address space '__user' of expression vim +/__user +295 arch/x86/kernel/shstk.c 271 272 int setup_signal_shadow_stack(struct ksignal *ksig) 273 { 274 void __user *restorer = ksig->ka.sa.sa_restorer; 275 unsigned long ssp; 276 int err; 277 278 if (!cpu_feature_enabled(X86_FEATURE_USER_SHSTK) || 279 !features_enabled(ARCH_SHSTK_SHSTK)) 280 return 0; 281 282 if (!restorer) 283 return -EINVAL; 284 285 ssp = get_user_shstk_addr(); 286 if (unlikely(!ssp)) 287 return -EINVAL; 288 289 err = shstk_push_sigframe(&ssp); 290 if (unlikely(err)) 291 return err; 292 293 /* Push restorer address */ 294 ssp -= SS_FRAME_SIZE; > 295 err = write_user_shstk_64((u64 __user *)ssp, (u64)restorer); 296 if (unlikely(err)) 297 return -EFAULT; 298 299 fpregs_lock_and_load(); 300 wrmsrl(MSR_IA32_PL3_SSP, ssp); 301 fpregs_unlock(); 302 303 return 0; 304 } 305 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki