From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.17]) (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 E170A7DA7F for ; Wed, 13 Nov 2024 13:23:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.17 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731504202; cv=none; b=hvVUi8Anex9b4CFy+TWK5gH6QWsLsniYavi1ckvfiXFASTZHABccfHhNqJAfEUcRiRWlanRuUIy3Cb7le/UboSZOWUCvjJPAJkUqHdPKrNyR5/jLaq8bGjhryaPdC6kpP+HGxlq4ynTEM4gxnO8nAeCtY5n5Xujd4faCNoTEuPw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731504202; c=relaxed/simple; bh=Gg2SCIXCVRFKCYEQ+hWgamTJyRG5uQ/VH43udAER+Ig=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=fLMU3wQaIB03TuwbHIu9/Zbi/2qQVRID3VV5kNkqVPd3IRkUQQYRsrUQJ8l63gKRDfMwgx1QDBe+mTGjpyL3hYrAEr6AiUCliyUIk2ADrKu/GyMk3dLp1uCxBLRJ1kImFRhCK7UcrDtSeB+6Y4WWh9hiqCen3PBPpDIxbEwBxhU= 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=jgyJl5jk; arc=none smtp.client-ip=192.198.163.17 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="jgyJl5jk" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1731504199; x=1763040199; h=date:from:to:cc:subject:message-id:mime-version; bh=Gg2SCIXCVRFKCYEQ+hWgamTJyRG5uQ/VH43udAER+Ig=; b=jgyJl5jkwmSzDKvdkqP57MMjpyANzW0mM2Dzw3jOtfhBjvI7Ng5D+72b Vu1EF0B4BuHo6P5pE5ZQVm6eVyyf+cBW4jw1QXHjla8j7XDAYoWG2N55m Hyk1e8h/uTGJGzzeRdxLrp65zbh1yepZXe6lngS/UU+ZKDavs55RF5SQc h5J4LyDkAUZg0mIQf4DqcOUuuAgp57K7kxyuZToRP5Ea/bK3UQ70Lw7OW XyWhxsKVWekX1Vv5RWQWP5CtN9lhKavUY4OrH1avkBzXE6ZJqHXhzTMcz rupG4YMIub5cjzWkr1zypTGV+nK1fA/bX0n6+pf8f8MQXeSPfPjb6X/5l Q==; X-CSE-ConnectionGUID: 1yhLL/GVTBisv+lQ9ml3HQ== X-CSE-MsgGUID: lRNNnsxgSGqKKWgsHaGzKA== X-IronPort-AV: E=McAfee;i="6700,10204,11254"; a="31277701" X-IronPort-AV: E=Sophos;i="6.12,151,1728975600"; d="scan'208";a="31277701" Received: from fmviesa004.fm.intel.com ([10.60.135.144]) by fmvoesa111.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Nov 2024 05:23:18 -0800 X-CSE-ConnectionGUID: P2gEA26fRAid8QMoX9gV9A== X-CSE-MsgGUID: SqjD7/zuRZKcoFTH+nOSWw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,151,1728975600"; d="scan'208";a="92644570" Received: from lkp-server01.sh.intel.com (HELO 80bd855f15b3) ([10.239.97.150]) by fmviesa004.fm.intel.com with ESMTP; 13 Nov 2024 05:23:16 -0800 Received: from kbuild by 80bd855f15b3 with local (Exim 4.96) (envelope-from ) id 1tBDL0-0000Pn-1H; Wed, 13 Nov 2024 13:23:14 +0000 Date: Wed, 13 Nov 2024 21:22:21 +0800 From: kernel test robot To: kernel@openeuler.org, Xie XiuQi Cc: oe-kbuild-all@lists.linux.dev Subject: [openeuler:openEuler-1.0-LTS 1291/1291] drivers/char/svm.c:312:17-38: WARNING: atomic_dec_and_test variation before object free at line 335. Message-ID: <202411132134.HfBsR3KA-lkp@intel.com> Precedence: bulk X-Mailing-List: oe-kbuild-all@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: a81d020c58c2c6a55ebaf15846470a9ecb69bd1a commit: 4cdb60f56180d6ef7c10bd0e50ddda96ebc9f783 [1291/1291] svm: implement unpin pages to dec refcount config: arm64-randconfig-r063-20241113 (https://download.01.org/0day-ci/archive/20241113/202411132134.HfBsR3KA-lkp@intel.com/config) compiler: aarch64-linux-gcc (GCC) 14.2.0 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/202411132134.HfBsR3KA-lkp@intel.com/ cocci warnings: (new ones prefixed by >>) >> drivers/char/svm.c:312:17-38: WARNING: atomic_dec_and_test variation before object free at line 335. vim +312 drivers/char/svm.c 304 305 static void svm_remove_sdma(struct svm_process *process, 306 struct svm_sdma *sdma, bool try_rm) 307 { 308 int null_count = 0; 309 310 mutex_lock(&process->mutex); 311 > 312 if (try_rm && (!atomic64_dec_and_test(&sdma->ref))) { 313 mutex_unlock(&process->mutex); 314 return; 315 } 316 317 rb_erase(&sdma->node, &process->sdma_list); 318 RB_CLEAR_NODE(&sdma->node); 319 mutex_unlock(&process->mutex); 320 321 while (sdma->nr_pages--) { 322 if (sdma->pages[sdma->nr_pages] == NULL) { 323 pr_err("null pointer, nr_pages:%d.\n", sdma->nr_pages); 324 null_count++; 325 continue; 326 } 327 328 put_page(sdma->pages[sdma->nr_pages]); 329 } 330 331 if (null_count) 332 dump_stack(); 333 334 kfree(sdma->pages); > 335 kfree(sdma); 336 } 337 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki