From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) (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 98A49332EA0 for ; Mon, 23 Mar 2026 19:41:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.9 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774294915; cv=none; b=s4rAA9OOJsKyHUvUP42NQgWXSUzslzXcB+lMbnWX28/Vj9EQ+7XNi+efxjLDxskfV3gF52fDC5Ijkxj6vdWYHEzgs47X9Mj9iieFxDUaQEUZ22W81LhDA2bUIenCoGKtMJD/GF4vrt8aEx8eZ2owCK/wpqEMNizgrvuNCrtW1yk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774294915; c=relaxed/simple; bh=Fv1htHQ4ZsAobIwv6JlD0dv3hsiPfJjskUQgouy4biI=; h=Date:From:To:Cc:Subject:Message-ID; b=MT7FYFPoLTWL36Hz9uBpLKXTTg2+ybk2YCUTcYr7TsmRrY1SGFTpphCzNiDYvAyXFL+YYfgiNJX4hI0OhHAZ/+HYZcpePp1v6TwIF26ZKh+PNHSFpT21G9oCetileq4R6XUj7mrZ1I2JT4YAapZe43K5xC8fPRX2hP+K3fhCFqM= 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=ESZdbegf; arc=none smtp.client-ip=198.175.65.9 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="ESZdbegf" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1774294914; x=1805830914; h=date:from:to:cc:subject:message-id; bh=Fv1htHQ4ZsAobIwv6JlD0dv3hsiPfJjskUQgouy4biI=; b=ESZdbegf1sToQB39b4QMLBhOfrLLemfG+zEgtMtXVrxVNYDREayPGErF GQGDQUZDvd/fy63nAtX5nCnY796sKdqp8y+nZ9kCRThhCDWEI9NXwJQ16 jMe7LcDg/vGtS0ComRolmi7HAuDDXKGByuceISHMpNfZGmJydob1frmpO xOBIK+KWJxjtevlzVGPQPmDckm3ud4eDDhbFcVTWGh/BToGgcO2RutejY q4eaFwlCWmP/bALePT5paKnd/5XhYUqsa4iNKVkQYcOx1H51MVCbbD8rn ZKeVgNcgr6II4p1dT2TlIpwk76IuxwR+RSMBytB6QsXv6yO02mEXpxQ2s g==; X-CSE-ConnectionGUID: 20seKPWvSJ6pvzQn0WVuCA== X-CSE-MsgGUID: ZksYyWT3TO2R+re/suutrw== X-IronPort-AV: E=McAfee;i="6800,10657,11738"; a="97922562" X-IronPort-AV: E=Sophos;i="6.23,137,1770624000"; d="scan'208";a="97922562" Received: from fmviesa008.fm.intel.com ([10.60.135.148]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Mar 2026 12:41:53 -0700 X-CSE-ConnectionGUID: yawJpuHFTC+TyARnYQ0nWw== X-CSE-MsgGUID: 6wstae1yTTyn4OyrRH1NOA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,137,1770624000"; d="scan'208";a="221272997" Received: from lkp-server01.sh.intel.com (HELO 3905d212be1b) ([10.239.97.150]) by fmviesa008.fm.intel.com with ESMTP; 23 Mar 2026 12:41:52 -0700 Received: from kbuild by 3905d212be1b with local (Exim 4.98.2) (envelope-from ) id 1w4l9p-0000000037x-0yjw; Mon, 23 Mar 2026 19:41:49 +0000 Date: Tue, 24 Mar 2026 03:41:00 +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: <202603240307.SkGfaRsG-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: c369299895a591d96745d6492d4888259b004a9e commit: 56180dd20c19e5b0fa34822997a9ac66b517e7b3 futex: Use RCU-based per-CPU reference counting instead of rcuref_t date: 9 months ago config: s390-randconfig-r051-20260323 (https://download.01.org/0day-ci/archive/20260324/202603240307.SkGfaRsG-lkp@intel.com/config) compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project c911b8492374942bf4cfe35411e90a35d3837f6a) 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/202603240307.SkGfaRsG-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