From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.10]) (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 4312D1E1DF0 for ; Mon, 2 Feb 2026 02:05:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.10 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769997923; cv=none; b=LmB3unsLCIJ9oK2R2OBTCwZdt5Qin5lqFrk6QkgXTd4q+/VSJhhjkCKU4y/iN5RDn4aeUcbtFdhyjwGzjD2At0TAeHoQt55te8eRl81Azcq6OMRujkXP8soRf931sJ/nKI6rpd4Pma/d1GC/cb1j1WPRCMFGkMhynJUURGGb7Gs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769997923; c=relaxed/simple; bh=dubTfeMWyR38ZCodDyq2UNaK+f32THn8tTifdmXOTTg=; h=Date:From:To:Cc:Subject:Message-ID; b=N8Hs0Va872JB4UsX8RvX2Px8VKgZEqVh2ftCl2X7FdLB2GZTvNMjMK6XY33Hy79nFMDSCYgojlzFjMvoQBV98xid66aHwGsSY2TvllfNQL26r2U4eI/UntV5JvZlycFXoVf2odIfDqhH92VX2sjqBUWSG5a3MlIblZeuNxxRfRs= 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=Vei50lsZ; arc=none smtp.client-ip=198.175.65.10 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="Vei50lsZ" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1769997922; x=1801533922; h=date:from:to:cc:subject:message-id; bh=dubTfeMWyR38ZCodDyq2UNaK+f32THn8tTifdmXOTTg=; b=Vei50lsZ630byeuqMihx5BxhLiDPnPfMVGwBliVyEYQnCiSSA0hKelKA ClPgDTh8URTUkVkNTYovB2fefViQBxyw/XfCznNACYHNl4ZmHuD/NgrdT 0eOkOtOm4wggG9Qe5ICK0G6gb3zi44FCJzMEwVpmgVP0rtoxXwp7ewHgv MjPjkDdR3la4gU1UFqvEqS7AYsTBB7ub/SPgznsAJ6SaY7zQTOXQSv+U2 3U+oJnvFB7JFfWRxt/ikLjm2UZBAbVjDNr8RvWG4OC0U2ugQpe6Nfo6Tx jeS7oClRaW4Eb/Lnme0VGnv37fUSBBAiP+ux8CRlTOzRvQveJFFWTK8uy Q==; X-CSE-ConnectionGUID: X8C1zPpRSmOGTSKZIjLn9Q== X-CSE-MsgGUID: vWjlHLQjRiCUwA0dRYeDcQ== X-IronPort-AV: E=McAfee;i="6800,10657,11689"; a="88577159" X-IronPort-AV: E=Sophos;i="6.21,267,1763452800"; d="scan'208";a="88577159" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Feb 2026 18:05:22 -0800 X-CSE-ConnectionGUID: N3p4nkOtTNyjo4ObSSNxlg== X-CSE-MsgGUID: r5UThWkBQ3a09U5TqoK3JA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,267,1763452800"; d="scan'208";a="208647211" Received: from lkp-server01.sh.intel.com (HELO 765f4a05e27f) ([10.239.97.150]) by orviesa010.jf.intel.com with ESMTP; 01 Feb 2026 18:05:20 -0800 Received: from kbuild by 765f4a05e27f with local (Exim 4.98.2) (envelope-from ) id 1vmjJW-00000000fB4-07xY; Mon, 02 Feb 2026 02:05:18 +0000 Date: Mon, 02 Feb 2026 10:05:00 +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: <202602021017.JuULzLgI-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: 18f7fcd5e69a04df57b563360b88be72471d6b62 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/20260202/202602021017.JuULzLgI-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/202602021017.JuULzLgI-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