From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.15]) (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 ED717340DA6 for ; Mon, 22 Dec 2025 13:50:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.15 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766411439; cv=none; b=abcDQxkuaDaxiLsEuFE7jRq8R9OffQBr/USEMd7Jw71HvIuhO2AIzq52BZ2x6R827zTQYexRXLxG/JAqL/vCglU2C6Jq7/412uOf6/n9KKTf5exEL/rFtUhRoOfXZm5E/WSXyOzp11mf12iiFwooFaaXwsu2/Tjr6EcnHoYSnTM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766411439; c=relaxed/simple; bh=hsHhkh5LKy7MgXe+vgdt51lHHVOv9oHAylPXMpAcbc4=; h=Date:From:To:Cc:Subject:Message-ID; b=Gkel1Oi6WDqWVQlKMVpYedqTRHeHE+t+1oQnVkSI+6rpfDzaFc+6EmSSpCqJiL9+4/XUOZIWpgtdP3/LL0C1nt8fbU1YoeIqoz8368jGEmZard0xzigFfh0Eztg4SWDW/My8ZGu5T3MRVCFkPDq9uQWwGecQbIfurGG3jThzNT4= 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=BwKeN9KI; arc=none smtp.client-ip=198.175.65.15 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="BwKeN9KI" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1766411439; x=1797947439; h=date:from:to:cc:subject:message-id; bh=hsHhkh5LKy7MgXe+vgdt51lHHVOv9oHAylPXMpAcbc4=; b=BwKeN9KIUapLppb/VomOzK/F3MUyPQGz9wyzLyUOj9yTXNc+g/+zCTUI ubPm3MGFKVhMH8elZVa6Qr6vQDz3+2CjUo4smHljbdcZD96lh78mbjj9q 3s9aAsHCdgTfG5VetyhNwuTztrxFKzN+01QbmVmEwys8r1/WEd1wVvIP1 2QC/IBieg1t23ItAx7dR70uYvAXfbRGVp4Dzw73xbhMkQGxn14BN4n0o8 WSMCz9TSpvYBnzAMI0UxlzFSGPNVvOkz/DQviw4gzhL/aVqF8UtLjqBTG EC/4VdPZpL1PuAJ1Oe2T2VcB9UiUO5FhqoudhH9bi4x4v0O0MeDOggArR g==; X-CSE-ConnectionGUID: qplzx5hYRAeMSq8SWFl13w== X-CSE-MsgGUID: Gm5FG1fpQ6ixDwBjpDHHQg== X-IronPort-AV: E=McAfee;i="6800,10657,11650"; a="71895000" X-IronPort-AV: E=Sophos;i="6.21,168,1763452800"; d="scan'208";a="71895000" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by orvoesa107.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Dec 2025 05:50:38 -0800 X-CSE-ConnectionGUID: nnUMSUkpTaiaIrY9Wf/7Ig== X-CSE-MsgGUID: /Xb205lxTXaILtVwAj5ASg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,168,1763452800"; d="scan'208";a="199166721" Received: from lkp-server02.sh.intel.com (HELO dd3453e2b682) ([10.239.97.151]) by fmviesa007.fm.intel.com with ESMTP; 22 Dec 2025 05:50:35 -0800 Received: from kbuild by dd3453e2b682 with local (Exim 4.98.2) (envelope-from ) id 1vXgIz-000000000eJ-0mLr; Mon, 22 Dec 2025 13:50:33 +0000 Date: Mon, 22 Dec 2025 21:50:16 +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: <202512222152.KF2aRkYU-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: 9448598b22c50c8a5bb77a9103e2d49f134c9578 commit: 56180dd20c19e5b0fa34822997a9ac66b517e7b3 futex: Use RCU-based per-CPU reference counting instead of rcuref_t date: 5 months ago config: arm-randconfig-r061-20251222 (https://download.01.org/0day-ci/archive/20251222/202512222152.KF2aRkYU-lkp@intel.com/config) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 789845e319bbf346d42ee2c0090a9b8e153797a2) 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/202512222152.KF2aRkYU-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