1 files changed, 0 insertions, 221 deletions
diff --git a/security/apparmor/context.c b/security/apparmor/context.c
deleted file mode 100644
index d95a3d47cb92..000000000000
--- a/security/apparmor/context.c
+++ /dev/null
@@ -1,221 +0,0 @@
-/*
- * AppArmor security module
- *
- * This file contains AppArmor functions used to manipulate object security
- * contexts.
- *
- * Copyright (C) 1998-2008 Novell/SUSE
- * Copyright 2009-2010 Canonical Ltd.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation, version 2 of the
- * License.
- *
- *
- * AppArmor sets confinement on every task, via the cred_label() which
- * is required and are not allowed to be NULL.  The cred_label is
- * reference counted.
- *
- * TODO
- * If a task uses change_hat it currently does not return to the old
- * cred or task context but instead creates a new one.  Ideally the task
- * should return to the previous cred if it has not been modified.
- *
- */
-
-#include "include/context.h"
-#include "include/policy.h"
-
-
-/**
- * aa_get_task_label - Get another task's label
- * @task: task to query  (NOT NULL)
- *
- * Returns: counted reference to @task's label
- */
-struct aa_label *aa_get_task_label(struct task_struct *task)
-{
-	struct aa_label *p;
-
-	rcu_read_lock();
-	p = aa_get_newest_label(__aa_task_raw_label(task));
-	rcu_read_unlock();
-
-	return p;
-}
-
-/**
- * aa_alloc_task_ctx - allocate a new task_ctx
- * @flags: gfp flags for allocation
- *
- * Returns: allocated buffer or NULL on failure
- */
-struct aa_task_ctx *aa_alloc_task_ctx(gfp_t flags)
-{
-	return kzalloc(sizeof(struct aa_task_ctx), flags);
-}
-
-/**
- * aa_free_task_ctx - free a task_ctx
- * @ctx: task_ctx to free (MAYBE NULL)
- */
-void aa_free_task_ctx(struct aa_task_ctx *ctx)
-{
-	if (ctx) {
-		aa_put_label(ctx->previous);
-		aa_put_label(ctx->onexec);
-
-		kzfree(ctx);
-	}
-}
-
-/**
- * aa_dup_task_ctx - duplicate a task context, incrementing reference counts
- * @new: a blank task context      (NOT NULL)
- * @old: the task context to copy  (NOT NULL)
- */
-void aa_dup_task_ctx(struct aa_task_ctx *new, const struct aa_task_ctx *old)
-{
-	*new = *old;
-	aa_get_label(new->previous);
-	aa_get_label(new->onexec);
-}
-
-/**
- * aa_replace_current_label - replace the current tasks label
- * @label: new label  (NOT NULL)
- *
- * Returns: 0 or error on failure
- */
-int aa_replace_current_label(struct aa_label *label)
-{
-	struct aa_label *old = aa_current_raw_label();
-	struct cred *new;
-
-	AA_BUG(!label);
-
-	if (old == label)
-		return 0;
-
-	if (current_cred() != current_real_cred())
-		return -EBUSY;
-
-	new  = prepare_creds();
-	if (!new)
-		return -ENOMEM;
-
-	if (unconfined(label) || (labels_ns(old) != labels_ns(label)))
-		/*
-		 * if switching to unconfined or a different label namespace
-		 * clear out context state
-		 */
-		aa_clear_task_ctx_trans(current_task_ctx());
-
-	/*
-	 * be careful switching cred label, when racing replacement it
-	 * is possible that the cred labels's->proxy->label is the reference
-	 * keeping @label valid, so make sure to get its reference before
-	 * dropping the reference on the cred's label
-	 */
-	aa_get_label(label);
-	aa_put_label(cred_label(new));
-	cred_label(new) = label;
-
-	commit_creds(new);
-	return 0;
-}
-
-/**
- * aa_set_current_onexec - set the tasks change_profile to happen onexec
- * @label: system label to set at exec  (MAYBE NULL to clear value)
- * @stack: whether stacking should be done
- * Returns: 0 or error on failure
- */
-int aa_set_current_onexec(struct aa_label *label, bool stack)
-{
-	struct aa_task_ctx *ctx = current_task_ctx();
-
-	aa_get_label(label);
-	aa_put_label(ctx->onexec);
-	ctx->onexec = label;
-	ctx->token = stack;
-
-	return 0;
-}
-
-/**
- * aa_set_current_hat - set the current tasks hat
- * @label: label to set as the current hat  (NOT NULL)
- * @token: token value that must be specified to change from the hat
- *
- * Do switch of tasks hat.  If the task is currently in a hat
- * validate the token to match.
- *
- * Returns: 0 or error on failure
- */
-int aa_set_current_hat(struct aa_label *label, u64 token)
-{
-	struct aa_task_ctx *ctx = current_task_ctx();
-	struct cred *new;
-
-	new = prepare_creds();
-	if (!new)
-		return -ENOMEM;
-	AA_BUG(!label);
-
-	if (!ctx->previous) {
-		/* transfer refcount */
-		ctx->previous = cred_label(new);
-		ctx->token = token;
-	} else if (ctx->token == token) {
-		aa_put_label(cred_label(new));
-	} else {
-		/* previous_profile && ctx->token != token */
-		abort_creds(new);
-		return -EACCES;
-	}
-
-	cred_label(new) = aa_get_newest_label(label);
-	/* clear exec on switching context */
-	aa_put_label(ctx->onexec);
-	ctx->onexec = NULL;
-
-	commit_creds(new);
-	return 0;
-}
-
-/**
- * aa_restore_previous_label - exit from hat context restoring previous label
- * @token: the token that must be matched to exit hat context
- *
- * Attempt to return out of a hat to the previous label.  The token
- * must match the stored token value.
- *
- * Returns: 0 or error of failure
- */
-int aa_restore_previous_label(u64 token)
-{
-	struct aa_task_ctx *ctx = current_task_ctx();
-	struct cred *new;
-
-	if (ctx->token != token)
-		return -EACCES;
-	/* ignore restores when there is no saved label */
-	if (!ctx->previous)
-		return 0;
-
-	new = prepare_creds();
-	if (!new)
-		return -ENOMEM;
-
-	aa_put_label(cred_label(new));
-	cred_label(new) = aa_get_newest_label(ctx->previous);
-	AA_BUG(!cred_label(new));
-	/* clear exec && prev information when restoring to previous context */
-	aa_clear_task_ctx_trans(ctx);
-
-	commit_creds(new);
-
-	return 0;
-}