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 7A1712C21D8 for ; Wed, 11 Mar 2026 06:33:04 +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=1773210786; cv=none; b=EKWMys9WpPZDO+znLfo7b9bfVBrqUv9CmG5tRsgpnax+rAFDjbjnE2HiecLKtIsNO98Nd5hutWns1C7vvC+wA7+5UWEs+f0jaPAyzBEgqnBy2hVqpGzlrTWpfIDbPVE1Z37L/Y/2Yo8Qkn64zM6tkZtgL9dQ7jcOb5145JXNcLc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773210786; c=relaxed/simple; bh=UpfZLynQyj2hoJQ0TygV62vn7Gy99M3F9gS6hzHS17o=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type; b=LS8JPVPhszgQ9sxgkn+L9tan1J7keDHCdPIeOGA2WerHG0NsOq3Z4RS5DMvgoPYkI2cliA0B0Y3vcSiI/u+ooIDFnGg/U+E9iMpUoZzdhq9nUR/SniCXHm0tXgo04/4I/aWFmhJy1cJANr5zcJCYTsxBcX8kydYQ5rY0kzEZ9JM= 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=UyV2FgPm; 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="UyV2FgPm" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1773210784; x=1804746784; h=date:from:to:cc:subject:message-id:mime-version: content-transfer-encoding; bh=UpfZLynQyj2hoJQ0TygV62vn7Gy99M3F9gS6hzHS17o=; b=UyV2FgPmb3er+eAX/LbnLNCFKc515CHRabO4yb92to2ZDZGQr+LYlCid hrBzxtHPio9IForzOEFAnHUUAbjP+yartWFoTdm2NIZ5AdQ6ViNziAdYs 9JwCUfhZqxCrz23BCbPdBS2C2zau5syEIc+BkOWZiDw+N/yPOOQds8B18 MgBQXFdxXRqq0ibaKHgPeG/54RahMFmr4yF0VVHgm3zMd0BFOdTs82ufS +5eU1ABgrrcMuMmfHjE4UTJVN2uHGsuaFUUbCHBIM6yzrk0/5I75di4JO I8PFIEnRO9DnqyEW35+UK+G1Ot+l46jhrwY2lsJrbo0K3iBLH8msYBeeT w==; X-CSE-ConnectionGUID: UjyBOtzzQkeDCVUJio9alg== X-CSE-MsgGUID: aIjydWeHS56coytW776eiA== X-IronPort-AV: E=McAfee;i="6800,10657,11725"; a="77876634" X-IronPort-AV: E=Sophos;i="6.23,113,1770624000"; d="scan'208";a="77876634" Received: from orviesa009.jf.intel.com ([10.64.159.149]) by orvoesa107.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Mar 2026 23:33:03 -0700 X-CSE-ConnectionGUID: H6sQt6N6QuWNFBlIHtCKVA== X-CSE-MsgGUID: wsr/1rQRRUiPtRmdGF8FpA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,113,1770624000"; d="scan'208";a="220311567" Received: from lkp-server01.sh.intel.com (HELO 418530b1a366) ([10.239.97.150]) by orviesa009.jf.intel.com with ESMTP; 10 Mar 2026 23:33:00 -0700 Received: from kbuild by 418530b1a366 with local (Exim 4.98.2) (envelope-from ) id 1w0D7r-000000000oT-1k5L; Wed, 11 Mar 2026 06:32:59 +0000 Date: Wed, 11 Mar 2026 14:32:13 +0800 From: kernel test robot To: oe-kbuild@lists.linux.dev Cc: lkp@intel.com, Dan Carpenter Subject: [axboe:rw_iter 115/471] drivers/hid/hid-picolcd_debugfs.c:50 picolcd_debug_reset_write() warn: potential spectre issue 'buf' [w] (local cap) Message-ID: <202603111411.GE776lsA-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: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable 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: 7dfd9f363e6d79bc842bf6e7fa86541a21142fef [115/471] drivers/hid: con= vert to read/write iterators :::::: branch date: 5 days ago :::::: commit date: 5 days ago config: openrisc-randconfig-r071-20260307 (https://download.01.org/0day-ci/= archive/20260311/202603111411.GE776lsA-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 versio= n of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Reported-by: Dan Carpenter | Closes: https://lore.kernel.org/r/202603111411.GE776lsA-lkp@intel.com/ smatch warnings: drivers/hid/hid-picolcd_debugfs.c:50 picolcd_debug_reset_write() warn: pote= ntial spectre issue 'buf' [w] (local cap) vim +/buf +50 drivers/hid/hid-picolcd_debugfs.c fabdbf2fd22fa1 Bruno Pr=C3=A9mont 2012-07-30 37 =20 7dfd9f363e6d79 Jens Axboe 2024-04-05 38 static ssize_t picolcd_debug_r= eset_write(struct kiocb *iocb, 7dfd9f363e6d79 Jens Axboe 2024-04-05 39 struct iov_iter *from) fabdbf2fd22fa1 Bruno Pr=C3=A9mont 2012-07-30 40 { 7dfd9f363e6d79 Jens Axboe 2024-04-05 41 struct picolcd_data *data =3D = ((struct seq_file *)iocb->ki_filp->private_data)->private; 7dfd9f363e6d79 Jens Axboe 2024-04-05 42 size_t count =3D iov_iter_cou= nt(from); fabdbf2fd22fa1 Bruno Pr=C3=A9mont 2012-07-30 43 char buf[32]; fabdbf2fd22fa1 Bruno Pr=C3=A9mont 2012-07-30 44 size_t cnt =3D min(count= , sizeof(buf)-1); 7dfd9f363e6d79 Jens Axboe 2024-04-05 45 if (!copy_from_iter_full(buf,= cnt, from)) fabdbf2fd22fa1 Bruno Pr=C3=A9mont 2012-07-30 46 return -EFAULT; fabdbf2fd22fa1 Bruno Pr=C3=A9mont 2012-07-30 47 =20 fabdbf2fd22fa1 Bruno Pr=C3=A9mont 2012-07-30 48 while (cnt > 0 && (buf[c= nt-1] =3D=3D ' ' || buf[cnt-1] =3D=3D '\n')) fabdbf2fd22fa1 Bruno Pr=C3=A9mont 2012-07-30 49 cnt--; fabdbf2fd22fa1 Bruno Pr=C3=A9mont 2012-07-30 @50 buf[cnt] =3D '\0'; fabdbf2fd22fa1 Bruno Pr=C3=A9mont 2012-07-30 51 if (strcmp(buf, "all") = =3D=3D 0) { fabdbf2fd22fa1 Bruno Pr=C3=A9mont 2012-07-30 52 picolcd_reset(data->hde= v); fabdbf2fd22fa1 Bruno Pr=C3=A9mont 2012-07-30 53 picolcd_fb_reset(data, = 1); fabdbf2fd22fa1 Bruno Pr=C3=A9mont 2012-07-30 54 } else if (strcmp(buf, "= fb") =3D=3D 0) { fabdbf2fd22fa1 Bruno Pr=C3=A9mont 2012-07-30 55 picolcd_fb_reset(data, = 1); fabdbf2fd22fa1 Bruno Pr=C3=A9mont 2012-07-30 56 } else { fabdbf2fd22fa1 Bruno Pr=C3=A9mont 2012-07-30 57 return -EINVAL; fabdbf2fd22fa1 Bruno Pr=C3=A9mont 2012-07-30 58 } fabdbf2fd22fa1 Bruno Pr=C3=A9mont 2012-07-30 59 return count; fabdbf2fd22fa1 Bruno Pr=C3=A9mont 2012-07-30 60 } fabdbf2fd22fa1 Bruno Pr=C3=A9mont 2012-07-30 61 =20 :::::: The code at line 50 was first introduced by commit :::::: fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 HID: picoLCD: split driver = code :::::: TO: Bruno Pr=C3=A9mont :::::: CC: Jiri Kosina --=20 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki