From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 3D8711836E2; Sun, 1 Sep 2024 16:21:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725207695; cv=none; b=DHtbhglupH6zVr8Fv0fClY5CvEIHYI+PpSsmf1DT3ejrAeIy0eYot01BVIeYTmI4AbCE/rkcNWwHQHMm7vTSM01yQh5nUzpRmAjhbNfNYARTYh+OTapeHXejVUerGy0dQl26t0+IOWbD4dj0di5zJGRvCSw/7Jw2c7gY0BxSoMY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725207695; c=relaxed/simple; bh=5U1SMmzPGnJlXzpzvr6EpU4keEXHtrbe8S8VX9ZTfQc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jNXe5zN9N8MhdMEPbo7ib2ORHCLtomV11PcCBqB+v/kH51Ohpfi7CUkuMfzbQaT0IPNymb7tzNoMN90fPmBdozwiBRn2BpiwCBp+EKBYBb//UlCuWbDI50leUDpuBrog1m81J7bO0MqVmL+14dI6+CULjHn1i6/KBFQsdDlWZOc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=2j7GMwNs; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="2j7GMwNs" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4ABC7C4CEC3; Sun, 1 Sep 2024 16:21:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1725207694; bh=5U1SMmzPGnJlXzpzvr6EpU4keEXHtrbe8S8VX9ZTfQc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2j7GMwNsLLyfWgeXc8dMOVTScwcd/90T0etgxWd68HdC5hFLZWEuyw6ibU+yE7D1t 1YIipRi7RHaXFGDaZsURAkIbkkjeghtS0hEVV7qRfoOKCvAUC52cnYCpiMqa5BrUs7 gv4ihvfGN/ARkFi5OaYUCneBmx/SNUDNwXvSIyn4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Baokun Li , Jan Kara , Theodore Tso , Sasha Levin Subject: [PATCH 4.19 49/98] ext4: set the type of max_zeroout to unsigned int to avoid overflow Date: Sun, 1 Sep 2024 18:16:19 +0200 Message-ID: <20240901160805.550075135@linuxfoundation.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240901160803.673617007@linuxfoundation.org> References: <20240901160803.673617007@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Baokun Li [ Upstream commit 261341a932d9244cbcd372a3659428c8723e5a49 ] The max_zeroout is of type int and the s_extent_max_zeroout_kb is of type uint, and the s_extent_max_zeroout_kb can be freely modified via the sysfs interface. When the block size is 1024, max_zeroout may overflow, so declare it as unsigned int to avoid overflow. Signed-off-by: Baokun Li Reviewed-by: Jan Kara Link: https://lore.kernel.org/r/20240319113325.3110393-9-libaokun1@huawei.com Signed-off-by: Theodore Ts'o Signed-off-by: Sasha Levin --- fs/ext4/extents.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index d931252b7d0d1..d162cc0590533 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -3445,9 +3445,10 @@ static int ext4_ext_convert_to_initialized(handle_t *handle, struct ext4_extent *ex, *abut_ex; ext4_lblk_t ee_block, eof_block; unsigned int ee_len, depth, map_len = map->m_len; - int allocated = 0, max_zeroout = 0; int err = 0; int split_flag = EXT4_EXT_DATA_VALID2; + int allocated = 0; + unsigned int max_zeroout = 0; ext_debug("ext4_ext_convert_to_initialized: inode %lu, logical" "block %llu, max_blocks %u\n", inode->i_ino, -- 2.43.0