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![Greg Kroah-Hartman](/assets/img/avatar_default.png)
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
911 lines
25 KiB
C
911 lines
25 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* security/tomoyo/domain.c
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*
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* Copyright (C) 2005-2011 NTT DATA CORPORATION
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*/
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#include "common.h"
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#include <linux/binfmts.h>
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#include <linux/slab.h>
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#include <linux/rculist.h>
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/* Variables definitions.*/
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/* The initial domain. */
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struct tomoyo_domain_info tomoyo_kernel_domain;
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/**
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* tomoyo_update_policy - Update an entry for exception policy.
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*
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* @new_entry: Pointer to "struct tomoyo_acl_info".
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* @size: Size of @new_entry in bytes.
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* @param: Pointer to "struct tomoyo_acl_param".
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* @check_duplicate: Callback function to find duplicated entry.
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*
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* Returns 0 on success, negative value otherwise.
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*
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* Caller holds tomoyo_read_lock().
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*/
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int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
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struct tomoyo_acl_param *param,
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bool (*check_duplicate) (const struct tomoyo_acl_head
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*,
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const struct tomoyo_acl_head
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*))
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{
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int error = param->is_delete ? -ENOENT : -ENOMEM;
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struct tomoyo_acl_head *entry;
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struct list_head *list = param->list;
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if (mutex_lock_interruptible(&tomoyo_policy_lock))
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return -ENOMEM;
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list_for_each_entry_rcu(entry, list, list) {
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if (entry->is_deleted == TOMOYO_GC_IN_PROGRESS)
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continue;
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if (!check_duplicate(entry, new_entry))
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continue;
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entry->is_deleted = param->is_delete;
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error = 0;
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break;
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}
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if (error && !param->is_delete) {
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entry = tomoyo_commit_ok(new_entry, size);
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if (entry) {
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list_add_tail_rcu(&entry->list, list);
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error = 0;
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}
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}
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mutex_unlock(&tomoyo_policy_lock);
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return error;
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}
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/**
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* tomoyo_same_acl_head - Check for duplicated "struct tomoyo_acl_info" entry.
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*
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* @a: Pointer to "struct tomoyo_acl_info".
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* @b: Pointer to "struct tomoyo_acl_info".
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*
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* Returns true if @a == @b, false otherwise.
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*/
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static inline bool tomoyo_same_acl_head(const struct tomoyo_acl_info *a,
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const struct tomoyo_acl_info *b)
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{
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return a->type == b->type && a->cond == b->cond;
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}
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/**
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* tomoyo_update_domain - Update an entry for domain policy.
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*
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* @new_entry: Pointer to "struct tomoyo_acl_info".
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* @size: Size of @new_entry in bytes.
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* @param: Pointer to "struct tomoyo_acl_param".
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* @check_duplicate: Callback function to find duplicated entry.
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* @merge_duplicate: Callback function to merge duplicated entry.
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*
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* Returns 0 on success, negative value otherwise.
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*
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* Caller holds tomoyo_read_lock().
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*/
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int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
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struct tomoyo_acl_param *param,
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bool (*check_duplicate) (const struct tomoyo_acl_info
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*,
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const struct tomoyo_acl_info
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*),
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bool (*merge_duplicate) (struct tomoyo_acl_info *,
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struct tomoyo_acl_info *,
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const bool))
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{
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const bool is_delete = param->is_delete;
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int error = is_delete ? -ENOENT : -ENOMEM;
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struct tomoyo_acl_info *entry;
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struct list_head * const list = param->list;
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if (param->data[0]) {
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new_entry->cond = tomoyo_get_condition(param);
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if (!new_entry->cond)
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return -EINVAL;
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/*
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* Domain transition preference is allowed for only
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* "file execute" entries.
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*/
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if (new_entry->cond->transit &&
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!(new_entry->type == TOMOYO_TYPE_PATH_ACL &&
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container_of(new_entry, struct tomoyo_path_acl, head)
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->perm == 1 << TOMOYO_TYPE_EXECUTE))
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goto out;
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}
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if (mutex_lock_interruptible(&tomoyo_policy_lock))
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goto out;
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list_for_each_entry_rcu(entry, list, list) {
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if (entry->is_deleted == TOMOYO_GC_IN_PROGRESS)
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continue;
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if (!tomoyo_same_acl_head(entry, new_entry) ||
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!check_duplicate(entry, new_entry))
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continue;
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if (merge_duplicate)
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entry->is_deleted = merge_duplicate(entry, new_entry,
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is_delete);
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else
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entry->is_deleted = is_delete;
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error = 0;
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break;
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}
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if (error && !is_delete) {
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entry = tomoyo_commit_ok(new_entry, size);
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if (entry) {
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list_add_tail_rcu(&entry->list, list);
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error = 0;
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}
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}
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mutex_unlock(&tomoyo_policy_lock);
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out:
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tomoyo_put_condition(new_entry->cond);
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return error;
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}
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/**
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* tomoyo_check_acl - Do permission check.
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*
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* @r: Pointer to "struct tomoyo_request_info".
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* @check_entry: Callback function to check type specific parameters.
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*
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* Returns 0 on success, negative value otherwise.
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*
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* Caller holds tomoyo_read_lock().
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*/
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void tomoyo_check_acl(struct tomoyo_request_info *r,
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bool (*check_entry) (struct tomoyo_request_info *,
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const struct tomoyo_acl_info *))
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{
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const struct tomoyo_domain_info *domain = r->domain;
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struct tomoyo_acl_info *ptr;
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bool retried = false;
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const struct list_head *list = &domain->acl_info_list;
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retry:
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list_for_each_entry_rcu(ptr, list, list) {
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if (ptr->is_deleted || ptr->type != r->param_type)
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continue;
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if (!check_entry(r, ptr))
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continue;
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if (!tomoyo_condition(r, ptr->cond))
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continue;
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r->matched_acl = ptr;
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r->granted = true;
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return;
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}
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if (!retried) {
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retried = true;
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list = &domain->ns->acl_group[domain->group];
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goto retry;
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}
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r->granted = false;
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}
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/* The list for "struct tomoyo_domain_info". */
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LIST_HEAD(tomoyo_domain_list);
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/**
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* tomoyo_last_word - Get last component of a domainname.
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*
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* @name: Domainname to check.
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*
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* Returns the last word of @domainname.
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*/
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static const char *tomoyo_last_word(const char *name)
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{
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const char *cp = strrchr(name, ' ');
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if (cp)
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return cp + 1;
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return name;
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}
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/**
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* tomoyo_same_transition_control - Check for duplicated "struct tomoyo_transition_control" entry.
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*
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* @a: Pointer to "struct tomoyo_acl_head".
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* @b: Pointer to "struct tomoyo_acl_head".
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*
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* Returns true if @a == @b, false otherwise.
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*/
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static bool tomoyo_same_transition_control(const struct tomoyo_acl_head *a,
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const struct tomoyo_acl_head *b)
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{
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const struct tomoyo_transition_control *p1 = container_of(a,
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typeof(*p1),
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head);
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const struct tomoyo_transition_control *p2 = container_of(b,
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typeof(*p2),
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head);
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return p1->type == p2->type && p1->is_last_name == p2->is_last_name
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&& p1->domainname == p2->domainname
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&& p1->program == p2->program;
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}
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/**
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* tomoyo_write_transition_control - Write "struct tomoyo_transition_control" list.
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*
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* @param: Pointer to "struct tomoyo_acl_param".
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* @type: Type of this entry.
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*
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* Returns 0 on success, negative value otherwise.
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*/
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int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
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const u8 type)
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{
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struct tomoyo_transition_control e = { .type = type };
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int error = param->is_delete ? -ENOENT : -ENOMEM;
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char *program = param->data;
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char *domainname = strstr(program, " from ");
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if (domainname) {
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*domainname = '\0';
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domainname += 6;
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} else if (type == TOMOYO_TRANSITION_CONTROL_NO_KEEP ||
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type == TOMOYO_TRANSITION_CONTROL_KEEP) {
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domainname = program;
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program = NULL;
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}
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if (program && strcmp(program, "any")) {
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if (!tomoyo_correct_path(program))
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return -EINVAL;
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e.program = tomoyo_get_name(program);
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if (!e.program)
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goto out;
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}
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if (domainname && strcmp(domainname, "any")) {
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if (!tomoyo_correct_domain(domainname)) {
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if (!tomoyo_correct_path(domainname))
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goto out;
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e.is_last_name = true;
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}
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e.domainname = tomoyo_get_name(domainname);
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if (!e.domainname)
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goto out;
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}
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param->list = ¶m->ns->policy_list[TOMOYO_ID_TRANSITION_CONTROL];
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error = tomoyo_update_policy(&e.head, sizeof(e), param,
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tomoyo_same_transition_control);
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out:
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tomoyo_put_name(e.domainname);
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tomoyo_put_name(e.program);
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return error;
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}
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/**
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* tomoyo_scan_transition - Try to find specific domain transition type.
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*
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* @list: Pointer to "struct list_head".
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* @domainname: The name of current domain.
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* @program: The name of requested program.
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* @last_name: The last component of @domainname.
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* @type: One of values in "enum tomoyo_transition_type".
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*
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* Returns true if found one, false otherwise.
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*
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* Caller holds tomoyo_read_lock().
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*/
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static inline bool tomoyo_scan_transition
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(const struct list_head *list, const struct tomoyo_path_info *domainname,
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const struct tomoyo_path_info *program, const char *last_name,
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const enum tomoyo_transition_type type)
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{
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const struct tomoyo_transition_control *ptr;
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list_for_each_entry_rcu(ptr, list, head.list) {
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if (ptr->head.is_deleted || ptr->type != type)
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continue;
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if (ptr->domainname) {
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if (!ptr->is_last_name) {
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if (ptr->domainname != domainname)
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continue;
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} else {
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/*
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* Use direct strcmp() since this is
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* unlikely used.
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*/
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if (strcmp(ptr->domainname->name, last_name))
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continue;
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}
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}
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if (ptr->program && tomoyo_pathcmp(ptr->program, program))
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continue;
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return true;
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}
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return false;
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}
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/**
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* tomoyo_transition_type - Get domain transition type.
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*
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* @ns: Pointer to "struct tomoyo_policy_namespace".
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* @domainname: The name of current domain.
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* @program: The name of requested program.
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*
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* Returns TOMOYO_TRANSITION_CONTROL_TRANSIT if executing @program causes
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* domain transition across namespaces, TOMOYO_TRANSITION_CONTROL_INITIALIZE if
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* executing @program reinitializes domain transition within that namespace,
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* TOMOYO_TRANSITION_CONTROL_KEEP if executing @program stays at @domainname ,
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* others otherwise.
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*
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* Caller holds tomoyo_read_lock().
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*/
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static enum tomoyo_transition_type tomoyo_transition_type
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(const struct tomoyo_policy_namespace *ns,
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const struct tomoyo_path_info *domainname,
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const struct tomoyo_path_info *program)
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{
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const char *last_name = tomoyo_last_word(domainname->name);
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enum tomoyo_transition_type type = TOMOYO_TRANSITION_CONTROL_NO_RESET;
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while (type < TOMOYO_MAX_TRANSITION_TYPE) {
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const struct list_head * const list =
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&ns->policy_list[TOMOYO_ID_TRANSITION_CONTROL];
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if (!tomoyo_scan_transition(list, domainname, program,
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last_name, type)) {
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type++;
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continue;
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}
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if (type != TOMOYO_TRANSITION_CONTROL_NO_RESET &&
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type != TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE)
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break;
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/*
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* Do not check for reset_domain if no_reset_domain matched.
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* Do not check for initialize_domain if no_initialize_domain
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* matched.
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*/
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type++;
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type++;
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}
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return type;
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}
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/**
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* tomoyo_same_aggregator - Check for duplicated "struct tomoyo_aggregator" entry.
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*
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* @a: Pointer to "struct tomoyo_acl_head".
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* @b: Pointer to "struct tomoyo_acl_head".
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*
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* Returns true if @a == @b, false otherwise.
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*/
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static bool tomoyo_same_aggregator(const struct tomoyo_acl_head *a,
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const struct tomoyo_acl_head *b)
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{
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const struct tomoyo_aggregator *p1 = container_of(a, typeof(*p1),
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head);
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const struct tomoyo_aggregator *p2 = container_of(b, typeof(*p2),
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head);
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return p1->original_name == p2->original_name &&
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p1->aggregated_name == p2->aggregated_name;
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}
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/**
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* tomoyo_write_aggregator - Write "struct tomoyo_aggregator" list.
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*
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* @param: Pointer to "struct tomoyo_acl_param".
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*
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* Returns 0 on success, negative value otherwise.
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*
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* Caller holds tomoyo_read_lock().
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*/
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int tomoyo_write_aggregator(struct tomoyo_acl_param *param)
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{
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struct tomoyo_aggregator e = { };
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int error = param->is_delete ? -ENOENT : -ENOMEM;
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const char *original_name = tomoyo_read_token(param);
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const char *aggregated_name = tomoyo_read_token(param);
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if (!tomoyo_correct_word(original_name) ||
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!tomoyo_correct_path(aggregated_name))
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return -EINVAL;
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e.original_name = tomoyo_get_name(original_name);
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e.aggregated_name = tomoyo_get_name(aggregated_name);
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if (!e.original_name || !e.aggregated_name ||
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e.aggregated_name->is_patterned) /* No patterns allowed. */
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goto out;
|
|
param->list = ¶m->ns->policy_list[TOMOYO_ID_AGGREGATOR];
|
|
error = tomoyo_update_policy(&e.head, sizeof(e), param,
|
|
tomoyo_same_aggregator);
|
|
out:
|
|
tomoyo_put_name(e.original_name);
|
|
tomoyo_put_name(e.aggregated_name);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* tomoyo_find_namespace - Find specified namespace.
|
|
*
|
|
* @name: Name of namespace to find.
|
|
* @len: Length of @name.
|
|
*
|
|
* Returns pointer to "struct tomoyo_policy_namespace" if found,
|
|
* NULL otherwise.
|
|
*
|
|
* Caller holds tomoyo_read_lock().
|
|
*/
|
|
static struct tomoyo_policy_namespace *tomoyo_find_namespace
|
|
(const char *name, const unsigned int len)
|
|
{
|
|
struct tomoyo_policy_namespace *ns;
|
|
list_for_each_entry(ns, &tomoyo_namespace_list, namespace_list) {
|
|
if (strncmp(name, ns->name, len) ||
|
|
(name[len] && name[len] != ' '))
|
|
continue;
|
|
return ns;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* tomoyo_assign_namespace - Create a new namespace.
|
|
*
|
|
* @domainname: Name of namespace to create.
|
|
*
|
|
* Returns pointer to "struct tomoyo_policy_namespace" on success,
|
|
* NULL otherwise.
|
|
*
|
|
* Caller holds tomoyo_read_lock().
|
|
*/
|
|
struct tomoyo_policy_namespace *tomoyo_assign_namespace(const char *domainname)
|
|
{
|
|
struct tomoyo_policy_namespace *ptr;
|
|
struct tomoyo_policy_namespace *entry;
|
|
const char *cp = domainname;
|
|
unsigned int len = 0;
|
|
while (*cp && *cp++ != ' ')
|
|
len++;
|
|
ptr = tomoyo_find_namespace(domainname, len);
|
|
if (ptr)
|
|
return ptr;
|
|
if (len >= TOMOYO_EXEC_TMPSIZE - 10 || !tomoyo_domain_def(domainname))
|
|
return NULL;
|
|
entry = kzalloc(sizeof(*entry) + len + 1, GFP_NOFS);
|
|
if (!entry)
|
|
return NULL;
|
|
if (mutex_lock_interruptible(&tomoyo_policy_lock))
|
|
goto out;
|
|
ptr = tomoyo_find_namespace(domainname, len);
|
|
if (!ptr && tomoyo_memory_ok(entry)) {
|
|
char *name = (char *) (entry + 1);
|
|
ptr = entry;
|
|
memmove(name, domainname, len);
|
|
name[len] = '\0';
|
|
entry->name = name;
|
|
tomoyo_init_policy_namespace(entry);
|
|
entry = NULL;
|
|
}
|
|
mutex_unlock(&tomoyo_policy_lock);
|
|
out:
|
|
kfree(entry);
|
|
return ptr;
|
|
}
|
|
|
|
/**
|
|
* tomoyo_namespace_jump - Check for namespace jump.
|
|
*
|
|
* @domainname: Name of domain.
|
|
*
|
|
* Returns true if namespace differs, false otherwise.
|
|
*/
|
|
static bool tomoyo_namespace_jump(const char *domainname)
|
|
{
|
|
const char *namespace = tomoyo_current_namespace()->name;
|
|
const int len = strlen(namespace);
|
|
return strncmp(domainname, namespace, len) ||
|
|
(domainname[len] && domainname[len] != ' ');
|
|
}
|
|
|
|
/**
|
|
* tomoyo_assign_domain - Create a domain or a namespace.
|
|
*
|
|
* @domainname: The name of domain.
|
|
* @transit: True if transit to domain found or created.
|
|
*
|
|
* Returns pointer to "struct tomoyo_domain_info" on success, NULL otherwise.
|
|
*
|
|
* Caller holds tomoyo_read_lock().
|
|
*/
|
|
struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
|
|
const bool transit)
|
|
{
|
|
struct tomoyo_domain_info e = { };
|
|
struct tomoyo_domain_info *entry = tomoyo_find_domain(domainname);
|
|
bool created = false;
|
|
if (entry) {
|
|
if (transit) {
|
|
/*
|
|
* Since namespace is created at runtime, profiles may
|
|
* not be created by the moment the process transits to
|
|
* that domain. Do not perform domain transition if
|
|
* profile for that domain is not yet created.
|
|
*/
|
|
if (tomoyo_policy_loaded &&
|
|
!entry->ns->profile_ptr[entry->profile])
|
|
return NULL;
|
|
}
|
|
return entry;
|
|
}
|
|
/* Requested domain does not exist. */
|
|
/* Don't create requested domain if domainname is invalid. */
|
|
if (strlen(domainname) >= TOMOYO_EXEC_TMPSIZE - 10 ||
|
|
!tomoyo_correct_domain(domainname))
|
|
return NULL;
|
|
/*
|
|
* Since definition of profiles and acl_groups may differ across
|
|
* namespaces, do not inherit "use_profile" and "use_group" settings
|
|
* by automatically creating requested domain upon domain transition.
|
|
*/
|
|
if (transit && tomoyo_namespace_jump(domainname))
|
|
return NULL;
|
|
e.ns = tomoyo_assign_namespace(domainname);
|
|
if (!e.ns)
|
|
return NULL;
|
|
/*
|
|
* "use_profile" and "use_group" settings for automatically created
|
|
* domains are inherited from current domain. These are 0 for manually
|
|
* created domains.
|
|
*/
|
|
if (transit) {
|
|
const struct tomoyo_domain_info *domain = tomoyo_domain();
|
|
e.profile = domain->profile;
|
|
e.group = domain->group;
|
|
}
|
|
e.domainname = tomoyo_get_name(domainname);
|
|
if (!e.domainname)
|
|
return NULL;
|
|
if (mutex_lock_interruptible(&tomoyo_policy_lock))
|
|
goto out;
|
|
entry = tomoyo_find_domain(domainname);
|
|
if (!entry) {
|
|
entry = tomoyo_commit_ok(&e, sizeof(e));
|
|
if (entry) {
|
|
INIT_LIST_HEAD(&entry->acl_info_list);
|
|
list_add_tail_rcu(&entry->list, &tomoyo_domain_list);
|
|
created = true;
|
|
}
|
|
}
|
|
mutex_unlock(&tomoyo_policy_lock);
|
|
out:
|
|
tomoyo_put_name(e.domainname);
|
|
if (entry && transit) {
|
|
if (created) {
|
|
struct tomoyo_request_info r;
|
|
tomoyo_init_request_info(&r, entry,
|
|
TOMOYO_MAC_FILE_EXECUTE);
|
|
r.granted = false;
|
|
tomoyo_write_log(&r, "use_profile %u\n",
|
|
entry->profile);
|
|
tomoyo_write_log(&r, "use_group %u\n", entry->group);
|
|
tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
|
|
}
|
|
}
|
|
return entry;
|
|
}
|
|
|
|
/**
|
|
* tomoyo_environ - Check permission for environment variable names.
|
|
*
|
|
* @ee: Pointer to "struct tomoyo_execve".
|
|
*
|
|
* Returns 0 on success, negative value otherwise.
|
|
*/
|
|
static int tomoyo_environ(struct tomoyo_execve *ee)
|
|
{
|
|
struct tomoyo_request_info *r = &ee->r;
|
|
struct linux_binprm *bprm = ee->bprm;
|
|
/* env_page.data is allocated by tomoyo_dump_page(). */
|
|
struct tomoyo_page_dump env_page = { };
|
|
char *arg_ptr; /* Size is TOMOYO_EXEC_TMPSIZE bytes */
|
|
int arg_len = 0;
|
|
unsigned long pos = bprm->p;
|
|
int offset = pos % PAGE_SIZE;
|
|
int argv_count = bprm->argc;
|
|
int envp_count = bprm->envc;
|
|
int error = -ENOMEM;
|
|
|
|
ee->r.type = TOMOYO_MAC_ENVIRON;
|
|
ee->r.profile = r->domain->profile;
|
|
ee->r.mode = tomoyo_get_mode(r->domain->ns, ee->r.profile,
|
|
TOMOYO_MAC_ENVIRON);
|
|
if (!r->mode || !envp_count)
|
|
return 0;
|
|
arg_ptr = kzalloc(TOMOYO_EXEC_TMPSIZE, GFP_NOFS);
|
|
if (!arg_ptr)
|
|
goto out;
|
|
while (error == -ENOMEM) {
|
|
if (!tomoyo_dump_page(bprm, pos, &env_page))
|
|
goto out;
|
|
pos += PAGE_SIZE - offset;
|
|
/* Read. */
|
|
while (argv_count && offset < PAGE_SIZE) {
|
|
if (!env_page.data[offset++])
|
|
argv_count--;
|
|
}
|
|
if (argv_count) {
|
|
offset = 0;
|
|
continue;
|
|
}
|
|
while (offset < PAGE_SIZE) {
|
|
const unsigned char c = env_page.data[offset++];
|
|
|
|
if (c && arg_len < TOMOYO_EXEC_TMPSIZE - 10) {
|
|
if (c == '=') {
|
|
arg_ptr[arg_len++] = '\0';
|
|
} else if (c == '\\') {
|
|
arg_ptr[arg_len++] = '\\';
|
|
arg_ptr[arg_len++] = '\\';
|
|
} else if (c > ' ' && c < 127) {
|
|
arg_ptr[arg_len++] = c;
|
|
} else {
|
|
arg_ptr[arg_len++] = '\\';
|
|
arg_ptr[arg_len++] = (c >> 6) + '0';
|
|
arg_ptr[arg_len++]
|
|
= ((c >> 3) & 7) + '0';
|
|
arg_ptr[arg_len++] = (c & 7) + '0';
|
|
}
|
|
} else {
|
|
arg_ptr[arg_len] = '\0';
|
|
}
|
|
if (c)
|
|
continue;
|
|
if (tomoyo_env_perm(r, arg_ptr)) {
|
|
error = -EPERM;
|
|
break;
|
|
}
|
|
if (!--envp_count) {
|
|
error = 0;
|
|
break;
|
|
}
|
|
arg_len = 0;
|
|
}
|
|
offset = 0;
|
|
}
|
|
out:
|
|
if (r->mode != TOMOYO_CONFIG_ENFORCING)
|
|
error = 0;
|
|
kfree(env_page.data);
|
|
kfree(arg_ptr);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* tomoyo_find_next_domain - Find a domain.
|
|
*
|
|
* @bprm: Pointer to "struct linux_binprm".
|
|
*
|
|
* Returns 0 on success, negative value otherwise.
|
|
*
|
|
* Caller holds tomoyo_read_lock().
|
|
*/
|
|
int tomoyo_find_next_domain(struct linux_binprm *bprm)
|
|
{
|
|
struct tomoyo_domain_info *old_domain = tomoyo_domain();
|
|
struct tomoyo_domain_info *domain = NULL;
|
|
const char *original_name = bprm->filename;
|
|
int retval = -ENOMEM;
|
|
bool reject_on_transition_failure = false;
|
|
const struct tomoyo_path_info *candidate;
|
|
struct tomoyo_path_info exename;
|
|
struct tomoyo_execve *ee = kzalloc(sizeof(*ee), GFP_NOFS);
|
|
|
|
if (!ee)
|
|
return -ENOMEM;
|
|
ee->tmp = kzalloc(TOMOYO_EXEC_TMPSIZE, GFP_NOFS);
|
|
if (!ee->tmp) {
|
|
kfree(ee);
|
|
return -ENOMEM;
|
|
}
|
|
/* ee->dump->data is allocated by tomoyo_dump_page(). */
|
|
tomoyo_init_request_info(&ee->r, NULL, TOMOYO_MAC_FILE_EXECUTE);
|
|
ee->r.ee = ee;
|
|
ee->bprm = bprm;
|
|
ee->r.obj = &ee->obj;
|
|
ee->obj.path1 = bprm->file->f_path;
|
|
/* Get symlink's pathname of program. */
|
|
retval = -ENOENT;
|
|
exename.name = tomoyo_realpath_nofollow(original_name);
|
|
if (!exename.name)
|
|
goto out;
|
|
tomoyo_fill_path_info(&exename);
|
|
retry:
|
|
/* Check 'aggregator' directive. */
|
|
{
|
|
struct tomoyo_aggregator *ptr;
|
|
struct list_head *list =
|
|
&old_domain->ns->policy_list[TOMOYO_ID_AGGREGATOR];
|
|
/* Check 'aggregator' directive. */
|
|
candidate = &exename;
|
|
list_for_each_entry_rcu(ptr, list, head.list) {
|
|
if (ptr->head.is_deleted ||
|
|
!tomoyo_path_matches_pattern(&exename,
|
|
ptr->original_name))
|
|
continue;
|
|
candidate = ptr->aggregated_name;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Check execute permission. */
|
|
retval = tomoyo_execute_permission(&ee->r, candidate);
|
|
if (retval == TOMOYO_RETRY_REQUEST)
|
|
goto retry;
|
|
if (retval < 0)
|
|
goto out;
|
|
/*
|
|
* To be able to specify domainnames with wildcards, use the
|
|
* pathname specified in the policy (which may contain
|
|
* wildcard) rather than the pathname passed to execve()
|
|
* (which never contains wildcard).
|
|
*/
|
|
if (ee->r.param.path.matched_path)
|
|
candidate = ee->r.param.path.matched_path;
|
|
|
|
/*
|
|
* Check for domain transition preference if "file execute" matched.
|
|
* If preference is given, make do_execve() fail if domain transition
|
|
* has failed, for domain transition preference should be used with
|
|
* destination domain defined.
|
|
*/
|
|
if (ee->transition) {
|
|
const char *domainname = ee->transition->name;
|
|
reject_on_transition_failure = true;
|
|
if (!strcmp(domainname, "keep"))
|
|
goto force_keep_domain;
|
|
if (!strcmp(domainname, "child"))
|
|
goto force_child_domain;
|
|
if (!strcmp(domainname, "reset"))
|
|
goto force_reset_domain;
|
|
if (!strcmp(domainname, "initialize"))
|
|
goto force_initialize_domain;
|
|
if (!strcmp(domainname, "parent")) {
|
|
char *cp;
|
|
strncpy(ee->tmp, old_domain->domainname->name,
|
|
TOMOYO_EXEC_TMPSIZE - 1);
|
|
cp = strrchr(ee->tmp, ' ');
|
|
if (cp)
|
|
*cp = '\0';
|
|
} else if (*domainname == '<')
|
|
strncpy(ee->tmp, domainname, TOMOYO_EXEC_TMPSIZE - 1);
|
|
else
|
|
snprintf(ee->tmp, TOMOYO_EXEC_TMPSIZE - 1, "%s %s",
|
|
old_domain->domainname->name, domainname);
|
|
goto force_jump_domain;
|
|
}
|
|
/*
|
|
* No domain transition preference specified.
|
|
* Calculate domain to transit to.
|
|
*/
|
|
switch (tomoyo_transition_type(old_domain->ns, old_domain->domainname,
|
|
candidate)) {
|
|
case TOMOYO_TRANSITION_CONTROL_RESET:
|
|
force_reset_domain:
|
|
/* Transit to the root of specified namespace. */
|
|
snprintf(ee->tmp, TOMOYO_EXEC_TMPSIZE - 1, "<%s>",
|
|
candidate->name);
|
|
/*
|
|
* Make do_execve() fail if domain transition across namespaces
|
|
* has failed.
|
|
*/
|
|
reject_on_transition_failure = true;
|
|
break;
|
|
case TOMOYO_TRANSITION_CONTROL_INITIALIZE:
|
|
force_initialize_domain:
|
|
/* Transit to the child of current namespace's root. */
|
|
snprintf(ee->tmp, TOMOYO_EXEC_TMPSIZE - 1, "%s %s",
|
|
old_domain->ns->name, candidate->name);
|
|
break;
|
|
case TOMOYO_TRANSITION_CONTROL_KEEP:
|
|
force_keep_domain:
|
|
/* Keep current domain. */
|
|
domain = old_domain;
|
|
break;
|
|
default:
|
|
if (old_domain == &tomoyo_kernel_domain &&
|
|
!tomoyo_policy_loaded) {
|
|
/*
|
|
* Needn't to transit from kernel domain before
|
|
* starting /sbin/init. But transit from kernel domain
|
|
* if executing initializers because they might start
|
|
* before /sbin/init.
|
|
*/
|
|
domain = old_domain;
|
|
break;
|
|
}
|
|
force_child_domain:
|
|
/* Normal domain transition. */
|
|
snprintf(ee->tmp, TOMOYO_EXEC_TMPSIZE - 1, "%s %s",
|
|
old_domain->domainname->name, candidate->name);
|
|
break;
|
|
}
|
|
force_jump_domain:
|
|
if (!domain)
|
|
domain = tomoyo_assign_domain(ee->tmp, true);
|
|
if (domain)
|
|
retval = 0;
|
|
else if (reject_on_transition_failure) {
|
|
printk(KERN_WARNING "ERROR: Domain '%s' not ready.\n",
|
|
ee->tmp);
|
|
retval = -ENOMEM;
|
|
} else if (ee->r.mode == TOMOYO_CONFIG_ENFORCING)
|
|
retval = -ENOMEM;
|
|
else {
|
|
retval = 0;
|
|
if (!old_domain->flags[TOMOYO_DIF_TRANSITION_FAILED]) {
|
|
old_domain->flags[TOMOYO_DIF_TRANSITION_FAILED] = true;
|
|
ee->r.granted = false;
|
|
tomoyo_write_log(&ee->r, "%s", tomoyo_dif
|
|
[TOMOYO_DIF_TRANSITION_FAILED]);
|
|
printk(KERN_WARNING
|
|
"ERROR: Domain '%s' not defined.\n", ee->tmp);
|
|
}
|
|
}
|
|
out:
|
|
if (!domain)
|
|
domain = old_domain;
|
|
/* Update reference count on "struct tomoyo_domain_info". */
|
|
atomic_inc(&domain->users);
|
|
bprm->cred->security = domain;
|
|
kfree(exename.name);
|
|
if (!retval) {
|
|
ee->r.domain = domain;
|
|
retval = tomoyo_environ(ee);
|
|
}
|
|
kfree(ee->tmp);
|
|
kfree(ee->dump.data);
|
|
kfree(ee);
|
|
return retval;
|
|
}
|
|
|
|
/**
|
|
* tomoyo_dump_page - Dump a page to buffer.
|
|
*
|
|
* @bprm: Pointer to "struct linux_binprm".
|
|
* @pos: Location to dump.
|
|
* @dump: Poiner to "struct tomoyo_page_dump".
|
|
*
|
|
* Returns true on success, false otherwise.
|
|
*/
|
|
bool tomoyo_dump_page(struct linux_binprm *bprm, unsigned long pos,
|
|
struct tomoyo_page_dump *dump)
|
|
{
|
|
struct page *page;
|
|
|
|
/* dump->data is released by tomoyo_find_next_domain(). */
|
|
if (!dump->data) {
|
|
dump->data = kzalloc(PAGE_SIZE, GFP_NOFS);
|
|
if (!dump->data)
|
|
return false;
|
|
}
|
|
/* Same with get_arg_page(bprm, pos, 0) in fs/exec.c */
|
|
#ifdef CONFIG_MMU
|
|
/*
|
|
* This is called at execve() time in order to dig around
|
|
* in the argv/environment of the new proceess
|
|
* (represented by bprm). 'current' is the process doing
|
|
* the execve().
|
|
*/
|
|
if (get_user_pages_remote(current, bprm->mm, pos, 1,
|
|
FOLL_FORCE, &page, NULL, NULL) <= 0)
|
|
return false;
|
|
#else
|
|
page = bprm->page[pos / PAGE_SIZE];
|
|
#endif
|
|
if (page != dump->page) {
|
|
const unsigned int offset = pos % PAGE_SIZE;
|
|
/*
|
|
* Maybe kmap()/kunmap() should be used here.
|
|
* But remove_arg_zero() uses kmap_atomic()/kunmap_atomic().
|
|
* So do I.
|
|
*/
|
|
char *kaddr = kmap_atomic(page);
|
|
|
|
dump->page = page;
|
|
memcpy(dump->data + offset, kaddr + offset,
|
|
PAGE_SIZE - offset);
|
|
kunmap_atomic(kaddr);
|
|
}
|
|
/* Same with put_arg_page(page) in fs/exec.c */
|
|
#ifdef CONFIG_MMU
|
|
put_page(page);
|
|
#endif
|
|
return true;
|
|
}
|