From nobody Sun Jun 21 16:13:55 2026 Received: from out-176.mta1.migadu.com (out-176.mta1.migadu.com [95.215.58.176]) (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 BE28F33AD85 for ; Thu, 2 Apr 2026 16:51:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.176 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775148705; cv=none; b=nwj1yytPgRJryVKzVPEmtKVjK0QH568HOG1L77ax6ywUyWzu4h0q4Y5FnK0/NgFYo8oWYQNXezzBTGKOFDGaDlGC77mkc8zH64enjZnN22QX1ahPyknxFqbZLGyomZim+itawUeDzgdxIcBeAMBO7zss3k3Sgpr+KANXf7NoXKI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775148705; c=relaxed/simple; bh=7+ebTfKNmoY0GJbcW4ffsXXZItEMbgpQ6j+s1RZFbzY=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=h3RTaz8VD5CsDx1dkGirkRlyD0hMCDKcricmuU48N9Z6A6juIShyKKsD2HcOBUZPvvLrrrxEyn9gdMXjFrJmYvU0SJMM+NcgzacUbnAnXXJoLW8d1zQ21YlOH6QtaGyXOIYbLcTbVWAx6lAuQW9PUAjDifRBm6wOLHsVpWngZ3Y= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=u51YtbSz; arc=none smtp.client-ip=95.215.58.176 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="u51YtbSz" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1775148695; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=e4OY0pFHQqF1taLpbuoZ/S+1gfsYOaYB6e+6qLBiwC8=; b=u51YtbSzkO9g4gp7z68UAp7pDnTk8CB3ln+PVWRTV7oW82r8aOpzSIOW5CLDL5lpOMy/HZ fGg2RDRo2EXZLugfGWVke2uIsjcusuar6yYXNxwsRtWIgdGidjVl7nDCBy3vyR+4ghjRXg GQHcPsBx0qbLPpz3FA6VEkyvCVzRGp4= From: Thorsten Blum To: Jens Axboe , Kees Cook , Thorsten Blum Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH RESEND] block: use sysfs_emit in sysfs show functions Date: Thu, 2 Apr 2026 18:50:00 +0200 Message-ID: <20260402164958.894879-4-thorsten.blum@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2186; i=thorsten.blum@linux.dev; h=from:subject; bh=nPckZVY05Ya9LYXM78UJ3KicfyNlpcwy07PqJzw0dyY=; b=owGbwMvMwCUWt7pQ4caZUj3G02pJDJnn5pl12c3Zqq3a6znPW2H5zrkdFze8PM58icX0qGO0R b1O6lmmjhIWBjEuBlkxRZYHs37M8C2tqdxkErETZg4rE8gQBi5OAZjITglGhpk18ot+SF7jUe6Y 63R5rlvw/Rk7AlSsRJzio9esZk5Yv4bhu2P1sp3nY4/YvmiWrDm0JOLYjlnXGbKL2qbJVVgarrv JAAA= X-Developer-Key: i=thorsten.blum@linux.dev; a=openpgp; fpr=1D60735E8AEF3BE473B69D84733678FD8DFEEAD4 Content-Transfer-Encoding: quoted-printable X-Migadu-Flow: FLOW_OUT Content-Type: text/plain; charset="utf-8" Replace sprintf() with sysfs_emit() in sysfs show functions. sysfs_emit() is preferred for formatting sysfs output because it provides safer bounds checking. Signed-off-by: Thorsten Blum Reviewed-by: Damien Le Moal --- block/partitions/core.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/block/partitions/core.c b/block/partitions/core.c index 740228750aaf..02ec8f663e6a 100644 --- a/block/partitions/core.c +++ b/block/partitions/core.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include #include @@ -177,31 +178,31 @@ static struct parsed_partitions *check_partition(stru= ct gendisk *hd) static ssize_t part_partition_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%d\n", bdev_partno(dev_to_bdev(dev))); + return sysfs_emit(buf, "%d\n", bdev_partno(dev_to_bdev(dev))); } =20 static ssize_t part_start_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%llu\n", dev_to_bdev(dev)->bd_start_sect); + return sysfs_emit(buf, "%llu\n", dev_to_bdev(dev)->bd_start_sect); } =20 static ssize_t part_ro_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%d\n", bdev_read_only(dev_to_bdev(dev))); + return sysfs_emit(buf, "%d\n", bdev_read_only(dev_to_bdev(dev))); } =20 static ssize_t part_alignment_offset_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%u\n", bdev_alignment_offset(dev_to_bdev(dev))); + return sysfs_emit(buf, "%u\n", bdev_alignment_offset(dev_to_bdev(dev))); } =20 static ssize_t part_discard_alignment_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%u\n", bdev_discard_alignment(dev_to_bdev(dev))); + return sysfs_emit(buf, "%u\n", bdev_discard_alignment(dev_to_bdev(dev))); } =20 static DEVICE_ATTR(partition, 0444, part_partition_show, NULL);