2009-02-05 08:18:15 +00:00
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/*
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* security/tomoyo/domain.c
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*
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2010-05-17 01:12:46 +00:00
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* Domain transition functions for TOMOYO.
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2009-02-05 08:18:15 +00:00
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*
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2010-05-17 01:12:46 +00:00
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* Copyright (C) 2005-2010 NTT DATA CORPORATION
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2009-02-05 08:18:15 +00:00
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*/
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#include "common.h"
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#include <linux/binfmts.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
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#include <linux/slab.h>
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2009-02-05 08:18:15 +00:00
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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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2010-06-15 00:23:26 +00:00
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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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2011-06-26 14:17:10 +00:00
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* @param: Pointer to "struct tomoyo_acl_param".
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2010-06-15 00:23:26 +00:00
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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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2011-06-26 14:17:10 +00:00
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struct tomoyo_acl_param *param,
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2010-06-15 00:23:26 +00:00
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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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2011-06-26 14:17:10 +00:00
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int error = param->is_delete ? -ENOENT : -ENOMEM;
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2010-06-15 00:23:26 +00:00
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struct tomoyo_acl_head *entry;
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2011-06-26 14:17:10 +00:00
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struct list_head *list = param->list;
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2010-06-15 00:23:26 +00:00
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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 (!check_duplicate(entry, new_entry))
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continue;
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2011-06-26 14:17:10 +00:00
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entry->is_deleted = param->is_delete;
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2010-06-15 00:23:26 +00:00
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error = 0;
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break;
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}
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2011-06-26 14:17:10 +00:00
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if (error && !param->is_delete) {
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2010-06-15 00:23:26 +00:00
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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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2011-06-26 14:16:36 +00:00
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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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2011-07-08 04:21:37 +00:00
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return a->type == b->type && a->cond == b->cond;
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2011-06-26 14:16:36 +00:00
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}
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2010-06-12 11:46:22 +00:00
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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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2011-06-26 14:17:10 +00:00
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* @param: Pointer to "struct tomoyo_acl_param".
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2010-06-12 11:46:22 +00:00
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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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2011-06-26 14:17:10 +00:00
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struct tomoyo_acl_param *param,
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2010-06-12 11:46:22 +00:00
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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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2011-06-26 14:17:10 +00:00
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const bool is_delete = param->is_delete;
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2010-06-12 11:46:22 +00:00
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int error = is_delete ? -ENOENT : -ENOMEM;
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struct tomoyo_acl_info *entry;
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2011-06-26 14:17:10 +00:00
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struct list_head * const list = param->list;
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2010-06-12 11:46:22 +00:00
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2011-07-08 04:21:37 +00:00
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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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2010-06-12 11:46:22 +00:00
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if (mutex_lock_interruptible(&tomoyo_policy_lock))
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2011-07-08 04:21:37 +00:00
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goto out;
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2011-06-26 14:17:10 +00:00
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list_for_each_entry_rcu(entry, list, list) {
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2011-06-26 14:16:36 +00:00
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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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2010-06-12 11:46:22 +00:00
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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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2011-06-26 14:17:10 +00:00
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list_add_tail_rcu(&entry->list, list);
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2010-06-12 11:46:22 +00:00
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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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2011-07-08 04:21:37 +00:00
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out:
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tomoyo_put_condition(new_entry->cond);
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2010-06-12 11:46:22 +00:00
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return error;
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}
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2011-06-26 14:19:28 +00:00
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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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2010-06-16 07:22:51 +00:00
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void tomoyo_check_acl(struct tomoyo_request_info *r,
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2010-07-29 05:29:55 +00:00
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bool (*check_entry) (struct tomoyo_request_info *,
|
2010-06-16 07:22:51 +00:00
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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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2011-06-26 14:19:28 +00:00
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bool retried = false;
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const struct list_head *list = &domain->acl_info_list;
|
2010-06-16 07:22:51 +00:00
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2011-06-26 14:19:28 +00:00
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retry:
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list_for_each_entry_rcu(ptr, list, list) {
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2010-06-16 07:22:51 +00:00
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if (ptr->is_deleted || ptr->type != r->param_type)
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continue;
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2011-07-08 04:21:37 +00:00
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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->granted = true;
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return;
|
2010-06-16 07:22:51 +00:00
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}
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2011-06-26 14:19:28 +00:00
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if (!retried) {
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retried = true;
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2011-06-26 14:19:52 +00:00
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list = &domain->ns->acl_group[domain->group];
|
2011-06-26 14:19:28 +00:00
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goto retry;
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}
|
2010-06-16 07:22:51 +00:00
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r->granted = false;
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}
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2010-06-17 07:53:24 +00:00
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/* The list for "struct tomoyo_domain_info". */
|
2009-02-05 08:18:15 +00:00
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LIST_HEAD(tomoyo_domain_list);
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/**
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2010-06-25 02:16:00 +00:00
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* tomoyo_last_word - Get last component of a domainname.
|
2009-02-05 08:18:15 +00:00
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*
|
2011-06-26 14:19:52 +00:00
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* @name: Domainname to check.
|
2009-02-05 08:18:15 +00:00
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*
|
2010-06-25 02:16:00 +00:00
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* Returns the last word of @domainname.
|
2009-02-05 08:18:15 +00:00
|
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*/
|
2010-06-25 02:16:00 +00:00
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static const char *tomoyo_last_word(const char *name)
|
2009-02-05 08:18:15 +00:00
|
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{
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2010-06-25 02:16:00 +00:00
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const char *cp = strrchr(name, ' ');
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|
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if (cp)
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return cp + 1;
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return name;
|
2009-02-05 08:18:15 +00:00
|
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}
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|
2011-06-26 14:17:10 +00:00
|
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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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* Returns true if @a == @b, false otherwise.
|
|
|
|
*/
|
2010-06-25 02:16:00 +00:00
|
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static bool tomoyo_same_transition_control(const struct tomoyo_acl_head *a,
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|
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const struct tomoyo_acl_head *b)
|
2010-06-15 00:23:26 +00:00
|
|
|
{
|
2010-06-21 02:14:39 +00:00
|
|
|
const struct tomoyo_transition_control *p1 = container_of(a,
|
|
|
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typeof(*p1),
|
|
|
|
head);
|
|
|
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const struct tomoyo_transition_control *p2 = container_of(b,
|
|
|
|
typeof(*p2),
|
|
|
|
head);
|
|
|
|
return p1->type == p2->type && p1->is_last_name == p2->is_last_name
|
2010-06-15 00:23:26 +00:00
|
|
|
&& p1->domainname == p2->domainname
|
|
|
|
&& p1->program == p2->program;
|
|
|
|
}
|
|
|
|
|
2009-02-05 08:18:15 +00:00
|
|
|
/**
|
2011-06-26 14:17:10 +00:00
|
|
|
* tomoyo_write_transition_control - Write "struct tomoyo_transition_control" list.
|
2009-02-05 08:18:15 +00:00
|
|
|
*
|
2011-06-26 14:17:10 +00:00
|
|
|
* @param: Pointer to "struct tomoyo_acl_param".
|
|
|
|
* @type: Type of this entry.
|
2009-02-05 08:18:15 +00:00
|
|
|
*
|
|
|
|
* Returns 0 on success, negative value otherwise.
|
|
|
|
*/
|
2011-06-26 14:17:10 +00:00
|
|
|
int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
|
|
|
|
const u8 type)
|
2009-02-05 08:18:15 +00:00
|
|
|
{
|
2010-06-21 02:14:39 +00:00
|
|
|
struct tomoyo_transition_control e = { .type = type };
|
2011-06-26 14:17:10 +00:00
|
|
|
int error = param->is_delete ? -ENOENT : -ENOMEM;
|
|
|
|
char *program = param->data;
|
|
|
|
char *domainname = strstr(program, " from ");
|
|
|
|
if (domainname) {
|
|
|
|
*domainname = '\0';
|
|
|
|
domainname += 6;
|
|
|
|
} else if (type == TOMOYO_TRANSITION_CONTROL_NO_KEEP ||
|
|
|
|
type == TOMOYO_TRANSITION_CONTROL_KEEP) {
|
|
|
|
domainname = program;
|
|
|
|
program = NULL;
|
|
|
|
}
|
2011-06-26 14:17:46 +00:00
|
|
|
if (program && strcmp(program, "any")) {
|
2010-06-21 02:14:39 +00:00
|
|
|
if (!tomoyo_correct_path(program))
|
|
|
|
return -EINVAL;
|
|
|
|
e.program = tomoyo_get_name(program);
|
|
|
|
if (!e.program)
|
|
|
|
goto out;
|
|
|
|
}
|
2011-06-26 14:17:46 +00:00
|
|
|
if (domainname && strcmp(domainname, "any")) {
|
2010-06-21 02:14:39 +00:00
|
|
|
if (!tomoyo_correct_domain(domainname)) {
|
|
|
|
if (!tomoyo_correct_path(domainname))
|
|
|
|
goto out;
|
2010-05-06 03:40:02 +00:00
|
|
|
e.is_last_name = true;
|
2010-06-21 02:14:39 +00:00
|
|
|
}
|
2010-05-06 03:40:02 +00:00
|
|
|
e.domainname = tomoyo_get_name(domainname);
|
|
|
|
if (!e.domainname)
|
2010-02-07 11:23:59 +00:00
|
|
|
goto out;
|
2009-02-05 08:18:15 +00:00
|
|
|
}
|
2011-06-26 14:19:52 +00:00
|
|
|
param->list = ¶m->ns->policy_list[TOMOYO_ID_TRANSITION_CONTROL];
|
2011-06-26 14:17:10 +00:00
|
|
|
error = tomoyo_update_policy(&e.head, sizeof(e), param,
|
2010-06-25 02:16:00 +00:00
|
|
|
tomoyo_same_transition_control);
|
2011-06-26 14:17:10 +00:00
|
|
|
out:
|
2010-05-06 03:40:02 +00:00
|
|
|
tomoyo_put_name(e.domainname);
|
|
|
|
tomoyo_put_name(e.program);
|
2009-02-05 08:18:15 +00:00
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2011-06-26 14:19:52 +00:00
|
|
|
* tomoyo_scan_transition - Try to find specific domain transition type.
|
2009-02-05 08:18:15 +00:00
|
|
|
*
|
2011-06-26 14:19:52 +00:00
|
|
|
* @list: Pointer to "struct list_head".
|
|
|
|
* @domainname: The name of current domain.
|
|
|
|
* @program: The name of requested program.
|
|
|
|
* @last_name: The last component of @domainname.
|
|
|
|
* @type: One of values in "enum tomoyo_transition_type".
|
2009-02-05 08:18:15 +00:00
|
|
|
*
|
2011-06-26 14:19:52 +00:00
|
|
|
* Returns true if found one, false otherwise.
|
2009-12-08 00:34:43 +00:00
|
|
|
*
|
|
|
|
* Caller holds tomoyo_read_lock().
|
2009-02-05 08:18:15 +00:00
|
|
|
*/
|
2011-06-26 14:19:52 +00:00
|
|
|
static inline bool tomoyo_scan_transition
|
|
|
|
(const struct list_head *list, const struct tomoyo_path_info *domainname,
|
|
|
|
const struct tomoyo_path_info *program, const char *last_name,
|
|
|
|
const enum tomoyo_transition_type type)
|
2009-02-05 08:18:15 +00:00
|
|
|
{
|
2010-06-21 02:14:39 +00:00
|
|
|
const struct tomoyo_transition_control *ptr;
|
2011-06-26 14:19:52 +00:00
|
|
|
list_for_each_entry_rcu(ptr, list, head.list) {
|
|
|
|
if (ptr->head.is_deleted || ptr->type != type)
|
|
|
|
continue;
|
|
|
|
if (ptr->domainname) {
|
|
|
|
if (!ptr->is_last_name) {
|
|
|
|
if (ptr->domainname != domainname)
|
|
|
|
continue;
|
|
|
|
} else {
|
2010-06-21 02:14:39 +00:00
|
|
|
/*
|
2011-06-26 14:19:52 +00:00
|
|
|
* Use direct strcmp() since this is
|
|
|
|
* unlikely used.
|
2010-06-21 02:14:39 +00:00
|
|
|
*/
|
2011-06-26 14:19:52 +00:00
|
|
|
if (strcmp(ptr->domainname->name, last_name))
|
|
|
|
continue;
|
2010-06-21 02:14:39 +00:00
|
|
|
}
|
2009-02-05 08:18:15 +00:00
|
|
|
}
|
2011-06-26 14:19:52 +00:00
|
|
|
if (ptr->program && tomoyo_pathcmp(ptr->program, program))
|
|
|
|
continue;
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* tomoyo_transition_type - Get domain transition type.
|
|
|
|
*
|
|
|
|
* @ns: Pointer to "struct tomoyo_policy_namespace".
|
|
|
|
* @domainname: The name of current domain.
|
|
|
|
* @program: The name of requested program.
|
|
|
|
*
|
|
|
|
* Returns TOMOYO_TRANSITION_CONTROL_TRANSIT if executing @program causes
|
|
|
|
* domain transition across namespaces, TOMOYO_TRANSITION_CONTROL_INITIALIZE if
|
|
|
|
* executing @program reinitializes domain transition within that namespace,
|
|
|
|
* TOMOYO_TRANSITION_CONTROL_KEEP if executing @program stays at @domainname ,
|
|
|
|
* others otherwise.
|
|
|
|
*
|
|
|
|
* Caller holds tomoyo_read_lock().
|
|
|
|
*/
|
|
|
|
static enum tomoyo_transition_type tomoyo_transition_type
|
|
|
|
(const struct tomoyo_policy_namespace *ns,
|
|
|
|
const struct tomoyo_path_info *domainname,
|
|
|
|
const struct tomoyo_path_info *program)
|
|
|
|
{
|
|
|
|
const char *last_name = tomoyo_last_word(domainname->name);
|
|
|
|
enum tomoyo_transition_type type = TOMOYO_TRANSITION_CONTROL_NO_RESET;
|
|
|
|
while (type < TOMOYO_MAX_TRANSITION_TYPE) {
|
|
|
|
const struct list_head * const list =
|
|
|
|
&ns->policy_list[TOMOYO_ID_TRANSITION_CONTROL];
|
|
|
|
if (!tomoyo_scan_transition(list, domainname, program,
|
|
|
|
last_name, type)) {
|
|
|
|
type++;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
if (type != TOMOYO_TRANSITION_CONTROL_NO_RESET &&
|
|
|
|
type != TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE)
|
|
|
|
break;
|
|
|
|
/*
|
|
|
|
* Do not check for reset_domain if no_reset_domain matched.
|
|
|
|
* Do not check for initialize_domain if no_initialize_domain
|
|
|
|
* matched.
|
|
|
|
*/
|
|
|
|
type++;
|
|
|
|
type++;
|
2009-02-05 08:18:15 +00:00
|
|
|
}
|
2010-06-21 02:14:39 +00:00
|
|
|
return type;
|
2009-02-05 08:18:15 +00:00
|
|
|
}
|
|
|
|
|
2011-06-26 14:17:10 +00:00
|
|
|
/**
|
|
|
|
* tomoyo_same_aggregator - Check for duplicated "struct tomoyo_aggregator" entry.
|
|
|
|
*
|
|
|
|
* @a: Pointer to "struct tomoyo_acl_head".
|
|
|
|
* @b: Pointer to "struct tomoyo_acl_head".
|
|
|
|
*
|
|
|
|
* Returns true if @a == @b, false otherwise.
|
|
|
|
*/
|
2010-06-25 02:16:00 +00:00
|
|
|
static bool tomoyo_same_aggregator(const struct tomoyo_acl_head *a,
|
|
|
|
const struct tomoyo_acl_head *b)
|
2010-06-15 00:23:26 +00:00
|
|
|
{
|
2011-06-26 14:17:10 +00:00
|
|
|
const struct tomoyo_aggregator *p1 = container_of(a, typeof(*p1),
|
|
|
|
head);
|
|
|
|
const struct tomoyo_aggregator *p2 = container_of(b, typeof(*p2),
|
|
|
|
head);
|
2010-06-15 00:23:26 +00:00
|
|
|
return p1->original_name == p2->original_name &&
|
|
|
|
p1->aggregated_name == p2->aggregated_name;
|
|
|
|
}
|
|
|
|
|
2010-06-03 11:38:03 +00:00
|
|
|
/**
|
2011-06-26 14:17:10 +00:00
|
|
|
* tomoyo_write_aggregator - Write "struct tomoyo_aggregator" list.
|
2010-06-03 11:38:03 +00:00
|
|
|
*
|
2011-06-26 14:17:10 +00:00
|
|
|
* @param: Pointer to "struct tomoyo_acl_param".
|
2010-06-03 11:38:03 +00:00
|
|
|
*
|
|
|
|
* Returns 0 on success, negative value otherwise.
|
|
|
|
*
|
|
|
|
* Caller holds tomoyo_read_lock().
|
|
|
|
*/
|
2011-06-26 14:17:10 +00:00
|
|
|
int tomoyo_write_aggregator(struct tomoyo_acl_param *param)
|
2010-06-03 11:38:03 +00:00
|
|
|
{
|
2010-06-25 02:16:00 +00:00
|
|
|
struct tomoyo_aggregator e = { };
|
2011-06-26 14:17:10 +00:00
|
|
|
int error = param->is_delete ? -ENOENT : -ENOMEM;
|
|
|
|
const char *original_name = tomoyo_read_token(param);
|
|
|
|
const char *aggregated_name = tomoyo_read_token(param);
|
|
|
|
if (!tomoyo_correct_word(original_name) ||
|
2010-06-16 07:23:55 +00:00
|
|
|
!tomoyo_correct_path(aggregated_name))
|
2010-06-03 11:38:03 +00:00
|
|
|
return -EINVAL;
|
|
|
|
e.original_name = tomoyo_get_name(original_name);
|
|
|
|
e.aggregated_name = tomoyo_get_name(aggregated_name);
|
|
|
|
if (!e.original_name || !e.aggregated_name ||
|
|
|
|
e.aggregated_name->is_patterned) /* No patterns allowed. */
|
|
|
|
goto out;
|
2011-06-26 14:19:52 +00:00
|
|
|
param->list = ¶m->ns->policy_list[TOMOYO_ID_AGGREGATOR];
|
2011-06-26 14:17:10 +00:00
|
|
|
error = tomoyo_update_policy(&e.head, sizeof(e), param,
|
2010-06-25 02:16:00 +00:00
|
|
|
tomoyo_same_aggregator);
|
2011-06-26 14:17:10 +00:00
|
|
|
out:
|
2010-06-03 11:38:03 +00:00
|
|
|
tomoyo_put_name(e.original_name);
|
|
|
|
tomoyo_put_name(e.aggregated_name);
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
2009-02-05 08:18:15 +00:00
|
|
|
/**
|
2011-06-26 14:19:52 +00:00
|
|
|
* tomoyo_find_namespace - Find specified namespace.
|
2009-02-05 08:18:15 +00:00
|
|
|
*
|
2011-06-26 14:19:52 +00:00
|
|
|
* @name: Name of namespace to find.
|
|
|
|
* @len: Length of @name.
|
2009-02-05 08:18:15 +00:00
|
|
|
*
|
2011-06-26 14:19:52 +00:00
|
|
|
* Returns pointer to "struct tomoyo_policy_namespace" if found,
|
|
|
|
* NULL otherwise.
|
2009-12-08 00:34:43 +00:00
|
|
|
*
|
|
|
|
* Caller holds tomoyo_read_lock().
|
2009-02-05 08:18:15 +00:00
|
|
|
*/
|
2011-06-26 14:19:52 +00:00
|
|
|
static struct tomoyo_policy_namespace *tomoyo_find_namespace
|
|
|
|
(const char *name, const unsigned int len)
|
2009-02-05 08:18:15 +00:00
|
|
|
{
|
2011-06-26 14:19:52 +00:00
|
|
|
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;
|
|
|
|
}
|
2009-02-05 08:18:15 +00:00
|
|
|
|
2011-06-26 14:19:52 +00:00
|
|
|
/**
|
|
|
|
* 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))
|
2010-02-07 11:23:59 +00:00
|
|
|
return NULL;
|
2011-06-26 14:19:52 +00:00
|
|
|
entry = kzalloc(sizeof(*entry) + len + 1, GFP_NOFS);
|
|
|
|
if (!entry)
|
2010-02-07 11:23:59 +00:00
|
|
|
return NULL;
|
2010-05-05 15:18:15 +00:00
|
|
|
if (mutex_lock_interruptible(&tomoyo_policy_lock))
|
|
|
|
goto out;
|
2011-06-26 14:19:52 +00:00
|
|
|
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);
|
2010-02-07 11:23:59 +00:00
|
|
|
entry = NULL;
|
2009-02-05 08:18:15 +00:00
|
|
|
}
|
2010-01-03 12:16:32 +00:00
|
|
|
mutex_unlock(&tomoyo_policy_lock);
|
2011-06-26 14:19:52 +00:00
|
|
|
out:
|
2010-02-07 11:23:59 +00:00
|
|
|
kfree(entry);
|
2011-06-26 14:19:52 +00:00
|
|
|
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 (!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);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return entry;
|
2009-02-05 08:18:15 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* tomoyo_find_next_domain - Find a domain.
|
|
|
|
*
|
2009-06-19 05:13:27 +00:00
|
|
|
* @bprm: Pointer to "struct linux_binprm".
|
2009-02-05 08:18:15 +00:00
|
|
|
*
|
|
|
|
* Returns 0 on success, negative value otherwise.
|
2009-12-08 00:34:43 +00:00
|
|
|
*
|
|
|
|
* Caller holds tomoyo_read_lock().
|
2009-02-05 08:18:15 +00:00
|
|
|
*/
|
2009-06-19 05:13:27 +00:00
|
|
|
int tomoyo_find_next_domain(struct linux_binprm *bprm)
|
2009-02-05 08:18:15 +00:00
|
|
|
{
|
|
|
|
struct tomoyo_domain_info *old_domain = tomoyo_domain();
|
|
|
|
struct tomoyo_domain_info *domain = NULL;
|
|
|
|
const char *original_name = bprm->filename;
|
|
|
|
int retval = -ENOMEM;
|
2010-06-03 11:36:43 +00:00
|
|
|
bool need_kfree = false;
|
2011-06-26 14:19:52 +00:00
|
|
|
bool reject_on_transition_failure = false;
|
2010-06-03 11:36:43 +00:00
|
|
|
struct tomoyo_path_info rn = { }; /* real name */
|
2011-07-08 04:25:53 +00:00
|
|
|
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;
|
2010-05-17 01:11:36 +00:00
|
|
|
retry:
|
2010-06-03 11:36:43 +00:00
|
|
|
if (need_kfree) {
|
|
|
|
kfree(rn.name);
|
|
|
|
need_kfree = false;
|
|
|
|
}
|
2010-06-21 00:58:53 +00:00
|
|
|
/* Get symlink's pathname of program. */
|
2009-02-05 08:18:15 +00:00
|
|
|
retval = -ENOENT;
|
2010-06-21 00:58:53 +00:00
|
|
|
rn.name = tomoyo_realpath_nofollow(original_name);
|
2010-06-03 11:36:43 +00:00
|
|
|
if (!rn.name)
|
2009-02-05 08:18:15 +00:00
|
|
|
goto out;
|
2010-06-03 11:36:43 +00:00
|
|
|
tomoyo_fill_path_info(&rn);
|
|
|
|
need_kfree = true;
|
|
|
|
|
2010-06-03 11:38:03 +00:00
|
|
|
/* Check 'aggregator' directive. */
|
|
|
|
{
|
2010-06-25 02:16:00 +00:00
|
|
|
struct tomoyo_aggregator *ptr;
|
2011-06-26 14:19:52 +00:00
|
|
|
struct list_head *list =
|
|
|
|
&old_domain->ns->policy_list[TOMOYO_ID_AGGREGATOR];
|
|
|
|
/* Check 'aggregator' directive. */
|
|
|
|
list_for_each_entry_rcu(ptr, list, head.list) {
|
2010-06-15 00:22:42 +00:00
|
|
|
if (ptr->head.is_deleted ||
|
2010-06-03 11:38:03 +00:00
|
|
|
!tomoyo_path_matches_pattern(&rn,
|
|
|
|
ptr->original_name))
|
|
|
|
continue;
|
2010-06-21 00:58:53 +00:00
|
|
|
kfree(rn.name);
|
2010-06-03 11:38:03 +00:00
|
|
|
need_kfree = false;
|
|
|
|
/* This is OK because it is read only. */
|
|
|
|
rn = *ptr->aggregated_name;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2009-02-05 08:18:15 +00:00
|
|
|
/* Check execute permission. */
|
2011-07-08 04:25:53 +00:00
|
|
|
retval = tomoyo_path_permission(&ee->r, TOMOYO_TYPE_EXECUTE, &rn);
|
2010-05-17 01:11:36 +00:00
|
|
|
if (retval == TOMOYO_RETRY_REQUEST)
|
|
|
|
goto retry;
|
2009-02-05 08:18:15 +00:00
|
|
|
if (retval < 0)
|
|
|
|
goto out;
|
2010-07-29 05:29:55 +00:00
|
|
|
/*
|
|
|
|
* 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).
|
|
|
|
*/
|
2011-07-08 04:25:53 +00:00
|
|
|
if (ee->r.param.path.matched_path) {
|
2010-07-29 05:29:55 +00:00
|
|
|
if (need_kfree)
|
|
|
|
kfree(rn.name);
|
|
|
|
need_kfree = false;
|
|
|
|
/* This is OK because it is read only. */
|
2011-07-08 04:25:53 +00:00
|
|
|
rn = *ee->r.param.path.matched_path;
|
2010-07-29 05:29:55 +00:00
|
|
|
}
|
2009-02-05 08:18:15 +00:00
|
|
|
|
2010-06-21 02:14:39 +00:00
|
|
|
/* Calculate domain to transit to. */
|
2011-06-26 14:19:52 +00:00
|
|
|
switch (tomoyo_transition_type(old_domain->ns, old_domain->domainname,
|
|
|
|
&rn)) {
|
|
|
|
case TOMOYO_TRANSITION_CONTROL_RESET:
|
|
|
|
/* Transit to the root of specified namespace. */
|
2011-07-08 04:25:53 +00:00
|
|
|
snprintf(ee->tmp, TOMOYO_EXEC_TMPSIZE - 1, "<%s>", rn.name);
|
2011-06-26 14:19:52 +00:00
|
|
|
/*
|
|
|
|
* Make do_execve() fail if domain transition across namespaces
|
|
|
|
* has failed.
|
|
|
|
*/
|
|
|
|
reject_on_transition_failure = true;
|
|
|
|
break;
|
2010-06-21 02:14:39 +00:00
|
|
|
case TOMOYO_TRANSITION_CONTROL_INITIALIZE:
|
2011-06-26 14:19:52 +00:00
|
|
|
/* Transit to the child of current namespace's root. */
|
2011-07-08 04:25:53 +00:00
|
|
|
snprintf(ee->tmp, TOMOYO_EXEC_TMPSIZE - 1, "%s %s",
|
2011-06-26 14:19:52 +00:00
|
|
|
old_domain->ns->name, rn.name);
|
2010-06-21 02:14:39 +00:00
|
|
|
break;
|
|
|
|
case TOMOYO_TRANSITION_CONTROL_KEEP:
|
2009-02-05 08:18:15 +00:00
|
|
|
/* Keep current domain. */
|
|
|
|
domain = old_domain;
|
2010-06-21 02:14:39 +00:00
|
|
|
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;
|
|
|
|
} else {
|
|
|
|
/* Normal domain transition. */
|
2011-07-08 04:25:53 +00:00
|
|
|
snprintf(ee->tmp, TOMOYO_EXEC_TMPSIZE - 1, "%s %s",
|
2010-06-21 02:14:39 +00:00
|
|
|
old_domain->domainname->name, rn.name);
|
|
|
|
}
|
|
|
|
break;
|
2009-02-05 08:18:15 +00:00
|
|
|
}
|
2011-06-26 14:15:31 +00:00
|
|
|
if (!domain)
|
2011-07-08 04:25:53 +00:00
|
|
|
domain = tomoyo_assign_domain(ee->tmp, true);
|
2009-02-05 08:18:15 +00:00
|
|
|
if (domain)
|
2011-06-26 14:19:52 +00:00
|
|
|
retval = 0;
|
|
|
|
else if (reject_on_transition_failure) {
|
2011-07-08 04:25:53 +00:00
|
|
|
printk(KERN_WARNING "ERROR: Domain '%s' not ready.\n",
|
|
|
|
ee->tmp);
|
2011-06-26 14:19:52 +00:00
|
|
|
retval = -ENOMEM;
|
2011-07-08 04:25:53 +00:00
|
|
|
} else if (ee->r.mode == TOMOYO_CONFIG_ENFORCING)
|
2011-06-26 14:19:52 +00:00
|
|
|
retval = -ENOMEM;
|
|
|
|
else {
|
|
|
|
retval = 0;
|
2011-06-26 14:21:19 +00:00
|
|
|
if (!old_domain->flags[TOMOYO_DIF_TRANSITION_FAILED]) {
|
|
|
|
old_domain->flags[TOMOYO_DIF_TRANSITION_FAILED] = true;
|
2011-07-08 04:25:53 +00:00
|
|
|
ee->r.granted = false;
|
|
|
|
tomoyo_write_log(&ee->r, "%s", tomoyo_dif
|
2011-06-26 14:21:19 +00:00
|
|
|
[TOMOYO_DIF_TRANSITION_FAILED]);
|
2011-06-26 14:19:52 +00:00
|
|
|
printk(KERN_WARNING
|
2011-07-08 04:25:53 +00:00
|
|
|
"ERROR: Domain '%s' not defined.\n", ee->tmp);
|
2011-06-26 14:19:52 +00:00
|
|
|
}
|
|
|
|
}
|
2009-02-05 08:18:15 +00:00
|
|
|
out:
|
2009-06-19 05:13:27 +00:00
|
|
|
if (!domain)
|
|
|
|
domain = old_domain;
|
2010-02-11 00:43:20 +00:00
|
|
|
/* Update reference count on "struct tomoyo_domain_info". */
|
|
|
|
atomic_inc(&domain->users);
|
2009-06-19 05:13:27 +00:00
|
|
|
bprm->cred->security = domain;
|
2010-06-03 11:36:43 +00:00
|
|
|
if (need_kfree)
|
|
|
|
kfree(rn.name);
|
2011-07-08 04:25:53 +00:00
|
|
|
kfree(ee->tmp);
|
|
|
|
kfree(ee->dump.data);
|
|
|
|
kfree(ee);
|
2009-02-05 08:18:15 +00:00
|
|
|
return retval;
|
|
|
|
}
|
2011-07-08 04:24:54 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* 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_finish_execve(). */
|
|
|
|
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
|
|
|
|
if (get_user_pages(current, bprm->mm, pos, 1, 0, 1, &page, 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, KM_USER0);
|
|
|
|
dump->page = page;
|
|
|
|
memcpy(dump->data + offset, kaddr + offset,
|
|
|
|
PAGE_SIZE - offset);
|
|
|
|
kunmap_atomic(kaddr, KM_USER0);
|
|
|
|
}
|
|
|
|
/* Same with put_arg_page(page) in fs/exec.c */
|
|
|
|
#ifdef CONFIG_MMU
|
|
|
|
put_page(page);
|
|
|
|
#endif
|
|
|
|
return true;
|
|
|
|
}
|