From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.18]) (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 57E4826CE05 for ; Sun, 1 Feb 2026 16:39:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769964000; cv=none; b=cYvGZgfbjojJhEftQBrCsFg7pqCkAEcHw6DH73B5lgsSzEQjFALYER+TM94jJ9cPe/ENiezxE2A+qCpxwUF3ye7vCaEc+CNNhldETO7gSrYimVmrCMndnuT4HBLfUYEj6kqzHHbCvZdCG7hOWBiGrnssv1Q4ndmEI4XP1hC3s1Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769964000; c=relaxed/simple; bh=3HTb0YPDd65e572M5YmxiZECIbQIMv7TSMohnUqkbM8=; h=Date:From:To:Cc:Subject:Message-ID; b=p+TDFZxk2zD+SvNu8+YSYiyVjHHbrAdDsVAo6I3wmjNJxUl+xNpQwXcyMmaXrd8Uw9yO4KqcLT/3c80bzyyj+s60rmr+fec5fCD18UsyKSh/1kR3hc+YoXA7kadXzPxfhzJBlRUJ+wl33k1bROoewSfljdSTxlBhHlHzt24GkvU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=UV6jwvvY; arc=none smtp.client-ip=192.198.163.18 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="UV6jwvvY" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1769963998; x=1801499998; h=date:from:to:cc:subject:message-id; bh=3HTb0YPDd65e572M5YmxiZECIbQIMv7TSMohnUqkbM8=; b=UV6jwvvY563O3HiuzVSLGlmG5g9/m33cxHzyuu9lSpHeKuqUtgeSL2Cv Hq4p8xwCuhdUYTXi26zFksPS72PnvQJo+7TdLvSrVGeZjoS/cMni3Witx 3KM0usZoFcvtOIXBXb8LqVjti21o49Hg61NrA90TKskNhOHTQkrncv4N/ bvmzuizhVak4BmkhMWLtEBZ+f3ybE1wLGKV3ViDxbJKbIqGH9TJmbQX0g hVXV5jjnhyBwUy6W6MVMTdV9A+8sX2+wXMbCC5uTzARvWTpiepUQKzDWs pEe+GnrAYo9UAo1w8eDw/lSDGN9W8V9f3PxU5p4psmyWK397eqbElqJMC w==; X-CSE-ConnectionGUID: Vv2vfhjRSN+gOdDUDY7Ufw== X-CSE-MsgGUID: Y8CSIA7HTPinNRjQ4hkBFg== X-IronPort-AV: E=McAfee;i="6800,10657,11689"; a="70343141" X-IronPort-AV: E=Sophos;i="6.21,267,1763452800"; d="scan'208";a="70343141" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by fmvoesa112.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Feb 2026 08:39:57 -0800 X-CSE-ConnectionGUID: GIcSVop5Rbi6+5w/RtvL9g== X-CSE-MsgGUID: XLusxyhoSjKR3/R9jOn4rw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,267,1763452800"; d="scan'208";a="213400079" Received: from lkp-server01.sh.intel.com (HELO 765f4a05e27f) ([10.239.97.150]) by orviesa003.jf.intel.com with ESMTP; 01 Feb 2026 08:39:56 -0800 Received: from kbuild by 765f4a05e27f with local (Exim 4.98.2) (envelope-from ) id 1vmaUL-00000000erc-3R7y; Sun, 01 Feb 2026 16:39:53 +0000 Date: Mon, 02 Feb 2026 00:39:13 +0800 From: kernel test robot To: Peter Zijlstra Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Sebastian Andrzej Siewior Subject: kernel/futex/core.c:1748:2-8: WARNING: NULL check before some freeing functions is not needed. Message-ID: <202602020051.j6qD61S7-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: oe-kbuild-all@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 162b42445b585cd89f45475848845db353539605 commit: 56180dd20c19e5b0fa34822997a9ac66b517e7b3 futex: Use RCU-based per-CPU reference counting instead of rcuref_t date: 7 months ago config: x86_64-randconfig-r061-20260201 (https://download.01.org/0day-ci/archive/20260202/202602020051.j6qD61S7-lkp@intel.com/config) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) 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/202602020051.j6qD61S7-lkp@intel.com/ cocci warnings: (new ones prefixed by >>) >> kernel/futex/core.c:1748:2-8: WARNING: NULL check before some freeing functions is not needed. vim +1748 kernel/futex/core.c 56180dd20c19e5 Peter Zijlstra 2025-07-10 1739 80367ad01d93ac Sebastian Andrzej Siewior 2025-04-16 1740 void futex_hash_free(struct mm_struct *mm) 80367ad01d93ac Sebastian Andrzej Siewior 2025-04-16 1741 { bd54df5ea7cada Sebastian Andrzej Siewior 2025-04-16 1742 struct futex_private_hash *fph; bd54df5ea7cada Sebastian Andrzej Siewior 2025-04-16 1743 56180dd20c19e5 Peter Zijlstra 2025-07-10 1744 free_percpu(mm->futex_ref); bd54df5ea7cada Sebastian Andrzej Siewior 2025-04-16 1745 kvfree(mm->futex_phash_new); bd54df5ea7cada Sebastian Andrzej Siewior 2025-04-16 1746 fph = rcu_dereference_raw(mm->futex_phash); 56180dd20c19e5 Peter Zijlstra 2025-07-10 1747 if (fph) bd54df5ea7cada Sebastian Andrzej Siewior 2025-04-16 @1748 kvfree(fph); bd54df5ea7cada Sebastian Andrzej Siewior 2025-04-16 1749 } bd54df5ea7cada Sebastian Andrzej Siewior 2025-04-16 1750 :::::: The code at line 1748 was first introduced by commit :::::: bd54df5ea7cadac520e346d5f0fe5d58e635b6ba futex: Allow to resize the private local hash :::::: TO: Sebastian Andrzej Siewior :::::: CC: Peter Zijlstra -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki