From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.21]) (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 983201EB9FD for ; Thu, 14 Nov 2024 08:59:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.21 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731574753; cv=none; b=RTb+s659LDr5BpY7IzVsPvpsQ0+e2YJ3bAPQ+8NV1D31f6FWeKeY0z3EK4XhXiBHCpDiAMFy4SQlfYsXr34sCeIF4qExgIeJH26IANG04hypUsLzml5m9tWkZ2QXaYNdzWCHRJQQL6EAa5CmqcxRUMjP8uJF/qI1PscKGktMxPc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731574753; c=relaxed/simple; bh=zmgGVKMZfes4VpUJdfgriBnLEaWUoRqsAbZOw2dqEJw=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=XX5gguzfnKonaBFpkxE/Qhc9YPdJwHcr2YLf6yasqa8We1C0vV4ifuhQOaNDHpuBYQze7dl8i+Yd5Lv+EhRIV67AX2gnyVxSthJhabT9WFeV74c5rpSGDxUR99wV6j/V6dP/y1Yv3M4mQefIsV2zoZXmxslTXMjtxSXBz5D8hCM= 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=Ba0orxTI; arc=none smtp.client-ip=198.175.65.21 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="Ba0orxTI" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1731574752; x=1763110752; h=date:from:to:cc:subject:message-id:mime-version; bh=zmgGVKMZfes4VpUJdfgriBnLEaWUoRqsAbZOw2dqEJw=; b=Ba0orxTIyIcHnzw6CBbKUiOjxLf4GZkrRIn6mspBPNntIfNXHxhoYODo znGeKtLNIw2hm7jAuxpPgJAuZD0zE+qzbHoSjkj2ZuDxjcugVheW4i49o DCymYGgDKTLbeWt6i9ve1gnU/WKgm82pUQIzAc0dXjDaZYiU1FPms6EN+ meSaSd2fb9ktpHoiL96uHwOzwzIDt9FhI+qRgCJV+EVgm3S7meFVD7khL ghu33ouJPkx8giu2BG95BBKDiURzQ9OWBWoq0gYp1sj9nf8Eb3ADNksOJ CIOggbVqU5tetYpSJKRXs7JxTG3pXoSzLvpE3GimHE4zjSJnHMoEtdLD1 w==; X-CSE-ConnectionGUID: GAJHyp/sTRS0auwTpe+z7g== X-CSE-MsgGUID: JeFnRoiLR2eralFHZUNdkw== X-IronPort-AV: E=McAfee;i="6700,10204,11222"; a="31476442" X-IronPort-AV: E=Sophos;i="6.11,199,1725346800"; d="scan'208";a="31476442" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by orvoesa113.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Nov 2024 00:59:11 -0800 X-CSE-ConnectionGUID: kFCCIwonQreffHEfd80mmw== X-CSE-MsgGUID: VkmR7VRtSBqR7YLqKym8Zw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,153,1728975600"; d="scan'208";a="118952856" Received: from lkp-server01.sh.intel.com (HELO 8eed2ac03994) ([10.239.97.150]) by orviesa002.jf.intel.com with ESMTP; 14 Nov 2024 00:59:10 -0800 Received: from kbuild by 8eed2ac03994 with local (Exim 4.96) (envelope-from ) id 1tBVgx-00008b-1w; Thu, 14 Nov 2024 08:59:07 +0000 Date: Thu, 14 Nov 2024 16:58:11 +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: <202411141631.Gm0CdUvq-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: d5c3ef07e625af7ba8aded2f507f092bceab3cbc commit: 4cdb60f56180d6ef7c10bd0e50ddda96ebc9f783 [1291/1291] svm: implement unpin pages to dec refcount config: arm64-randconfig-r063-20241113 (https://download.01.org/0day-ci/archive/20241114/202411141631.Gm0CdUvq-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/202411141631.Gm0CdUvq-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