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Diffstat (limited to 'ipc/kdbus/item.c')
-rw-r--r--ipc/kdbus/item.c293
1 files changed, 0 insertions, 293 deletions
diff --git a/ipc/kdbus/item.c b/ipc/kdbus/item.c
deleted file mode 100644
index ce78dba03..000000000
--- a/ipc/kdbus/item.c
+++ /dev/null
@@ -1,293 +0,0 @@
-/*
- * Copyright (C) 2013-2015 Kay Sievers
- * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
- * Copyright (C) 2013-2015 Daniel Mack <daniel@zonque.org>
- * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@gmail.com>
- * Copyright (C) 2013-2015 Linux Foundation
- * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@opendz.org>
- *
- * kdbus is free software; you can redistribute it and/or modify it under
- * the terms of the GNU Lesser General Public License as published by the
- * Free Software Foundation; either version 2.1 of the License, or (at
- * your option) any later version.
- */
-
-#include <linux/ctype.h>
-#include <linux/fs.h>
-#include <linux/string.h>
-
-#include "item.h"
-#include "limits.h"
-#include "util.h"
-
-/*
- * This verifies the string at position @str with size @size is properly
- * zero-terminated and does not contain a 0-byte but at the end.
- */
-static bool kdbus_str_valid(const char *str, size_t size)
-{
- return size > 0 && memchr(str, '\0', size) == str + size - 1;
-}
-
-/**
- * kdbus_item_validate_name() - validate an item containing a name
- * @item: Item to validate
- *
- * Return: zero on success or an negative error code on failure
- */
-int kdbus_item_validate_name(const struct kdbus_item *item)
-{
- const char *name = item->str;
- unsigned int i;
- size_t len;
-
- if (item->size < KDBUS_ITEM_HEADER_SIZE + 2)
- return -EINVAL;
-
- if (item->size > KDBUS_ITEM_HEADER_SIZE +
- KDBUS_SYSNAME_MAX_LEN + 1)
- return -ENAMETOOLONG;
-
- if (!kdbus_str_valid(name, KDBUS_ITEM_PAYLOAD_SIZE(item)))
- return -EINVAL;
-
- len = strlen(name);
- if (len == 0)
- return -EINVAL;
-
- for (i = 0; i < len; i++) {
- if (isalpha(name[i]))
- continue;
- if (isdigit(name[i]))
- continue;
- if (name[i] == '_')
- continue;
- if (i > 0 && i + 1 < len && (name[i] == '-' || name[i] == '.'))
- continue;
-
- return -EINVAL;
- }
-
- return 0;
-}
-
-/**
- * kdbus_item_validate() - validate a single item
- * @item: item to validate
- *
- * Return: 0 if item is valid, negative error code if not.
- */
-int kdbus_item_validate(const struct kdbus_item *item)
-{
- size_t payload_size = KDBUS_ITEM_PAYLOAD_SIZE(item);
- size_t l;
- int ret;
-
- BUILD_BUG_ON(KDBUS_ITEM_HEADER_SIZE !=
- sizeof(struct kdbus_item_header));
-
- if (item->size < KDBUS_ITEM_HEADER_SIZE)
- return -EINVAL;
-
- switch (item->type) {
- case KDBUS_ITEM_NEGOTIATE:
- if (payload_size % sizeof(u64) != 0)
- return -EINVAL;
- break;
-
- case KDBUS_ITEM_PAYLOAD_VEC:
- case KDBUS_ITEM_PAYLOAD_OFF:
- if (payload_size != sizeof(struct kdbus_vec))
- return -EINVAL;
- if (item->vec.size == 0 || item->vec.size > SIZE_MAX)
- return -EINVAL;
- break;
-
- case KDBUS_ITEM_PAYLOAD_MEMFD:
- if (payload_size != sizeof(struct kdbus_memfd))
- return -EINVAL;
- if (item->memfd.size == 0 || item->memfd.size > SIZE_MAX)
- return -EINVAL;
- if (item->memfd.fd < 0)
- return -EBADF;
- break;
-
- case KDBUS_ITEM_FDS:
- if (payload_size % sizeof(int) != 0)
- return -EINVAL;
- break;
-
- case KDBUS_ITEM_CANCEL_FD:
- if (payload_size != sizeof(int))
- return -EINVAL;
- break;
-
- case KDBUS_ITEM_BLOOM_PARAMETER:
- if (payload_size != sizeof(struct kdbus_bloom_parameter))
- return -EINVAL;
- break;
-
- case KDBUS_ITEM_BLOOM_FILTER:
- /* followed by the bloom-mask, depends on the bloom-size */
- if (payload_size < sizeof(struct kdbus_bloom_filter))
- return -EINVAL;
- break;
-
- case KDBUS_ITEM_BLOOM_MASK:
- /* size depends on bloom-size of bus */
- break;
-
- case KDBUS_ITEM_CONN_DESCRIPTION:
- case KDBUS_ITEM_MAKE_NAME:
- ret = kdbus_item_validate_name(item);
- if (ret < 0)
- return ret;
- break;
-
- case KDBUS_ITEM_ATTACH_FLAGS_SEND:
- case KDBUS_ITEM_ATTACH_FLAGS_RECV:
- case KDBUS_ITEM_ID:
- case KDBUS_ITEM_DST_ID:
- if (payload_size != sizeof(u64))
- return -EINVAL;
- break;
-
- case KDBUS_ITEM_TIMESTAMP:
- if (payload_size != sizeof(struct kdbus_timestamp))
- return -EINVAL;
- break;
-
- case KDBUS_ITEM_CREDS:
- if (payload_size != sizeof(struct kdbus_creds))
- return -EINVAL;
- break;
-
- case KDBUS_ITEM_AUXGROUPS:
- if (payload_size % sizeof(u32) != 0)
- return -EINVAL;
- break;
-
- case KDBUS_ITEM_NAME:
- case KDBUS_ITEM_DST_NAME:
- case KDBUS_ITEM_PID_COMM:
- case KDBUS_ITEM_TID_COMM:
- case KDBUS_ITEM_EXE:
- case KDBUS_ITEM_CMDLINE:
- case KDBUS_ITEM_CGROUP:
- case KDBUS_ITEM_SECLABEL:
- if (!kdbus_str_valid(item->str, payload_size))
- return -EINVAL;
- break;
-
- case KDBUS_ITEM_CAPS:
- if (payload_size < sizeof(u32))
- return -EINVAL;
- if (payload_size < sizeof(u32) +
- 4 * CAP_TO_INDEX(item->caps.last_cap) * sizeof(u32))
- return -EINVAL;
- break;
-
- case KDBUS_ITEM_AUDIT:
- if (payload_size != sizeof(struct kdbus_audit))
- return -EINVAL;
- break;
-
- case KDBUS_ITEM_POLICY_ACCESS:
- if (payload_size != sizeof(struct kdbus_policy_access))
- return -EINVAL;
- break;
-
- case KDBUS_ITEM_NAME_ADD:
- case KDBUS_ITEM_NAME_REMOVE:
- case KDBUS_ITEM_NAME_CHANGE:
- if (payload_size < sizeof(struct kdbus_notify_name_change))
- return -EINVAL;
- l = payload_size - offsetof(struct kdbus_notify_name_change,
- name);
- if (l > 0 && !kdbus_str_valid(item->name_change.name, l))
- return -EINVAL;
- break;
-
- case KDBUS_ITEM_ID_ADD:
- case KDBUS_ITEM_ID_REMOVE:
- if (payload_size != sizeof(struct kdbus_notify_id_change))
- return -EINVAL;
- break;
-
- case KDBUS_ITEM_REPLY_TIMEOUT:
- case KDBUS_ITEM_REPLY_DEAD:
- if (payload_size != 0)
- return -EINVAL;
- break;
-
- default:
- break;
- }
-
- return 0;
-}
-
-/**
- * kdbus_items_validate() - validate items passed by user-space
- * @items: items to validate
- * @items_size: number of items
- *
- * This verifies that the passed items pointer is consistent and valid.
- * Furthermore, each item is checked for:
- * - valid "size" value
- * - payload is of expected type
- * - payload is fully included in the item
- * - string payloads are zero-terminated
- *
- * Return: 0 on success, negative error code on failure.
- */
-int kdbus_items_validate(const struct kdbus_item *items, size_t items_size)
-{
- const struct kdbus_item *item;
- int ret;
-
- KDBUS_ITEMS_FOREACH(item, items, items_size) {
- if (!KDBUS_ITEM_VALID(item, items, items_size))
- return -EINVAL;
-
- ret = kdbus_item_validate(item);
- if (ret < 0)
- return ret;
- }
-
- if (!KDBUS_ITEMS_END(item, items, items_size))
- return -EINVAL;
-
- return 0;
-}
-
-/**
- * kdbus_item_set() - Set item content
- * @item: The item to modify
- * @type: The item type to set (KDBUS_ITEM_*)
- * @data: Data to copy to item->data, may be %NULL
- * @len: Number of bytes in @data
- *
- * This sets type, size and data fields of an item. If @data is NULL, the data
- * memory is cleared.
- *
- * Note that you must align your @data memory to 8 bytes. Trailing padding (in
- * case @len is not 8byte aligned) is cleared by this call.
- *
- * Returns: Pointer to the following item.
- */
-struct kdbus_item *kdbus_item_set(struct kdbus_item *item, u64 type,
- const void *data, size_t len)
-{
- item->type = type;
- item->size = KDBUS_ITEM_HEADER_SIZE + len;
-
- if (data) {
- memcpy(item->data, data, len);
- memset(item->data + len, 0, KDBUS_ALIGN8(len) - len);
- } else {
- memset(item->data, 0, KDBUS_ALIGN8(len));
- }
-
- return KDBUS_ITEM_NEXT(item);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-12 11:36:34 +0000