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 24988161B65; Mon, 29 Jan 2024 17:12:37 +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=1706548357; cv=none; b=b++M6qMwOaCyrdObq9+LM7YVWv0aNsv6btPZArHal8iHppueG6bbOG0OSRuoqND3VrWLdOZVzbn2jw0xe5P4DvHDue+Dl+6Yca3VSt7Nkem1KJHHmoagY+Du7Mo4t9c9hmAJrXQpEigKSnnqEWVG6uSiJ/K/GRzT4D9FkwQp//U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706548357; c=relaxed/simple; bh=GEWEQAZGwtdUEpe3umJfVPJNz+SZa+7l0zDc8a1/v+c=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=QpN7901Tg+bnNVHEqdrvntY/B99PHn7No+MApfZbR8EzvOpeSuwFEYd0ZzjxQM+HoiQLdUaSRUoyfyGDsO5+1xcLR9SiG+icXSKhwmi59Kd5AQWO+V/1qCbH9NYbdbHx0msCr08lrtrW8lrSqxIxPY3AIBbFOurRNiFey8mfhos= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=O/qortU5; 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="O/qortU5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E376DC433F1; Mon, 29 Jan 2024 17:12:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1706548357; bh=GEWEQAZGwtdUEpe3umJfVPJNz+SZa+7l0zDc8a1/v+c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=O/qortU5ciwN9yRiOhywGdI7lX32Z8FQ+Eomix9Nchot020LUC0WlfbzBuH9mty6X A2lk568GJq1KfuLaWkANmgEs07MAeABy5UHQABQlcrYDLKdzOaDP+8K7S3sKIz8Mgx I6a27jiQEI6o5P478qWtQScQMNeZTEKwRWODVzP8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Filipe Manana , Qu Wenruo , David Sterba Subject: [PATCH 6.1 119/185] btrfs: defrag: reject unknown flags of btrfs_ioctl_defrag_range_args Date: Mon, 29 Jan 2024 09:05:19 -0800 Message-ID: <20240129170002.417682118@linuxfoundation.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240129165958.589924174@linuxfoundation.org> References: <20240129165958.589924174@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 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Qu Wenruo commit 173431b274a9a54fc10b273b46e67f46bcf62d2e upstream. Add extra sanity check for btrfs_ioctl_defrag_range_args::flags. This is not really to enhance fuzzing tests, but as a preparation for future expansion on btrfs_ioctl_defrag_range_args. In the future we're going to add new members, allowing more fine tuning for btrfs defrag. Without the -ENONOTSUPP error, there would be no way to detect if the kernel supports those new defrag features. CC: stable@vger.kernel.org # 4.14+ Reviewed-by: Filipe Manana Signed-off-by: Qu Wenruo Reviewed-by: David Sterba Signed-off-by: David Sterba Signed-off-by: Greg Kroah-Hartman --- fs/btrfs/ioctl.c | 4 ++++ include/uapi/linux/btrfs.h | 3 +++ 2 files changed, 7 insertions(+) --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -3500,6 +3500,10 @@ static int btrfs_ioctl_defrag(struct fil ret = -EFAULT; goto out; } + if (range.flags & ~BTRFS_DEFRAG_RANGE_FLAGS_SUPP) { + ret = -EOPNOTSUPP; + goto out; + } /* compression requires us to start the IO */ if ((range.flags & BTRFS_DEFRAG_RANGE_COMPRESS)) { range.flags |= BTRFS_DEFRAG_RANGE_START_IO; --- a/include/uapi/linux/btrfs.h +++ b/include/uapi/linux/btrfs.h @@ -585,6 +585,9 @@ struct btrfs_ioctl_clone_range_args { */ #define BTRFS_DEFRAG_RANGE_COMPRESS 1 #define BTRFS_DEFRAG_RANGE_START_IO 2 +#define BTRFS_DEFRAG_RANGE_FLAGS_SUPP (BTRFS_DEFRAG_RANGE_COMPRESS | \ + BTRFS_DEFRAG_RANGE_START_IO) + struct btrfs_ioctl_defrag_range_args { /* start of the defrag operation */ __u64 start;