From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.19]) (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 46074286415 for ; Tue, 10 Mar 2026 14:13:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.19 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773152035; cv=none; b=aio5qwC1Vo/PNafo+HT2TfIKKRnZkGXnIOvw3kndgPP2SYlvzYVUhUTDKX3mSzARRxlozII4e532FfCuBKW37DCRxYHJwLHoqMP4+jcNHid6J4BkOSgDi8xHWxGQs2sGS9fm/UtylKuFZTrJn1ldo59CgPf3cNIY0VtegcIr9f4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773152035; c=relaxed/simple; bh=mXa5e/flPR51kxQmb1rDEogWUQl/nMTENZyjtha2qVg=; h=Date:From:To:Cc:Subject:Message-ID; b=eFPHb+G1+5t1gtG2aEfxFQ4SVGKa2CobeBmAz+60Nk6r6V5fO0tTH5CwoztS/WuFKACprJGz+BUmhwFheco2lPNnSyrfyEzBs59MjYXOr/WKeJJ2PsMh3AeazF5q6v2KLsU7/OUQHE3uYerYDy/clbNarRCoFBZm4tbWSv5VOTo= 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=PcyQoGRD; arc=none smtp.client-ip=192.198.163.19 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="PcyQoGRD" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1773152034; x=1804688034; h=date:from:to:cc:subject:message-id; bh=mXa5e/flPR51kxQmb1rDEogWUQl/nMTENZyjtha2qVg=; b=PcyQoGRDKp2bXDWU6m5NPgP44EWd2if/A6w92INOA+vvE8XMuMEshIB6 QqgivFK+Ls7IBmGhcEJ0eZoA1WFjarhn/lCwmRzugvRsl0O/sadgTZo5t IPL9wPtUiX6SJVfoqafa6yD5aFEdH5BNGbL3qiOtCwmOevDx0UpA/ozjW 3c+yP02I3kABg8BA+f8Qhwhax7hrtsoRXqAB+X0fTa/z+ZZw9OT/awXr4 w16nZB/4qVEYLmy5l63kUMqIJiXAWtAe6RcIMvozARv54RNbDnQtPi6a5 iglWBKt9tCJP6AlHWlYTcury5ggDGXhsauPMC2ff/XhZtgAcdTpoB8Swa w==; X-CSE-ConnectionGUID: iWBRj4ZDQbGX5xAn8etwAA== X-CSE-MsgGUID: tEHtJFC8Q4OAWtfMRhvGWw== X-IronPort-AV: E=McAfee;i="6800,10657,11725"; a="73222467" X-IronPort-AV: E=Sophos;i="6.23,112,1770624000"; d="scan'208";a="73222467" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by fmvoesa113.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Mar 2026 07:13:53 -0700 X-CSE-ConnectionGUID: j+1+QnGBTWy7MnutXogJbw== X-CSE-MsgGUID: dpPrJGFhTpWcfWG1iLSSmA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,112,1770624000"; d="scan'208";a="216497563" Received: from lkp-server01.sh.intel.com (HELO 434e41ea3c86) ([10.239.97.150]) by fmviesa006.fm.intel.com with ESMTP; 10 Mar 2026 07:13:52 -0700 Received: from kbuild by 434e41ea3c86 with local (Exim 4.98.2) (envelope-from ) id 1vzxqI-0000000023K-0Mtv; Tue, 10 Mar 2026 14:13:50 +0000 Date: Tue, 10 Mar 2026 22:13:28 +0800 From: kernel test robot To: oe-kbuild@lists.linux.dev Cc: lkp@intel.com, Dan Carpenter Subject: [axboe:rw_iter 39/471] fs/libfs.c:1514 __simple_write_iter() warn: potential spectre issue 'attr->set_buf' [w] Message-ID: <202603102208.xRXDgO2R-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: oe-kbuild@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: BCC: lkp@intel.com CC: oe-kbuild-all@lists.linux.dev TO: Jens Axboe tree: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux.git rw_iter head: 0a49759be1c3b29207758e467fdc1a90d0716d06 commit: 7b40f9995773bf20c745784d976fc4e3cfc54699 [39/471] libfs: switch to read iter and add copy helpers :::::: branch date: 4 days ago :::::: commit date: 6 days ago config: openrisc-randconfig-r071-20260307 (https://download.01.org/0day-ci/archive/20260310/202603102208.xRXDgO2R-lkp@intel.com/config) compiler: or1k-linux-gcc (GCC) 15.2.0 smatch: v0.5.0-9004-gb810ac53 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 | Reported-by: Dan Carpenter | Closes: https://lore.kernel.org/r/202603102208.xRXDgO2R-lkp@intel.com/ smatch warnings: fs/libfs.c:1514 __simple_write_iter() warn: potential spectre issue 'attr->set_buf' [w] vim +1514 fs/libfs.c 7b40f9995773bf Jens Axboe 2024-04-03 1491 7b40f9995773bf Jens Axboe 2024-04-03 1492 static ssize_t __simple_write_iter(struct kiocb *iocb, struct iov_iter *from, 7b40f9995773bf Jens Axboe 2024-04-03 1493 bool is_signed) 7b40f9995773bf Jens Axboe 2024-04-03 1494 { 7b40f9995773bf Jens Axboe 2024-04-03 1495 struct simple_attr *attr; 7b40f9995773bf Jens Axboe 2024-04-03 1496 unsigned long long val; 7b40f9995773bf Jens Axboe 2024-04-03 1497 size_t len = iov_iter_count(from); 7b40f9995773bf Jens Axboe 2024-04-03 1498 size_t size; 7b40f9995773bf Jens Axboe 2024-04-03 1499 ssize_t ret; 7b40f9995773bf Jens Axboe 2024-04-03 1500 7b40f9995773bf Jens Axboe 2024-04-03 1501 attr = iocb->ki_filp->private_data; 7b40f9995773bf Jens Axboe 2024-04-03 1502 if (!attr->set) 7b40f9995773bf Jens Axboe 2024-04-03 1503 return -EACCES; 7b40f9995773bf Jens Axboe 2024-04-03 1504 7b40f9995773bf Jens Axboe 2024-04-03 1505 ret = mutex_lock_interruptible(&attr->mutex); 7b40f9995773bf Jens Axboe 2024-04-03 1506 if (ret) 7b40f9995773bf Jens Axboe 2024-04-03 1507 return ret; 7b40f9995773bf Jens Axboe 2024-04-03 1508 7b40f9995773bf Jens Axboe 2024-04-03 1509 ret = -EFAULT; 7b40f9995773bf Jens Axboe 2024-04-03 1510 size = min(sizeof(attr->set_buf) - 1, len); 7b40f9995773bf Jens Axboe 2024-04-03 1511 if (!copy_from_iter(attr->set_buf, size, from)) 7b40f9995773bf Jens Axboe 2024-04-03 1512 goto out; 7b40f9995773bf Jens Axboe 2024-04-03 1513 7b40f9995773bf Jens Axboe 2024-04-03 @1514 attr->set_buf[size] = '\0'; 7b40f9995773bf Jens Axboe 2024-04-03 1515 if (is_signed) 7b40f9995773bf Jens Axboe 2024-04-03 1516 ret = kstrtoll(attr->set_buf, 0, &val); 7b40f9995773bf Jens Axboe 2024-04-03 1517 else 7b40f9995773bf Jens Axboe 2024-04-03 1518 ret = kstrtoull(attr->set_buf, 0, &val); 7b40f9995773bf Jens Axboe 2024-04-03 1519 if (ret) 7b40f9995773bf Jens Axboe 2024-04-03 1520 goto out; 7b40f9995773bf Jens Axboe 2024-04-03 1521 ret = attr->set(attr->data, val); 7b40f9995773bf Jens Axboe 2024-04-03 1522 if (ret == 0) 7b40f9995773bf Jens Axboe 2024-04-03 1523 ret = len; /* on success, claim we got the whole input */ 7b40f9995773bf Jens Axboe 2024-04-03 1524 out: 7b40f9995773bf Jens Axboe 2024-04-03 1525 mutex_unlock(&attr->mutex); 7b40f9995773bf Jens Axboe 2024-04-03 1526 return ret; 7b40f9995773bf Jens Axboe 2024-04-03 1527 } 7b40f9995773bf Jens Axboe 2024-04-03 1528 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki