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-rw-r--r--security/apparmor/context.c107
1 files changed, 56 insertions, 51 deletions
diff --git a/security/apparmor/context.c b/security/apparmor/context.c
index 3064c6ced87c..1fc16b88efbf 100644
--- a/security/apparmor/context.c
+++ b/security/apparmor/context.c
@@ -13,11 +13,11 @@
* License.
*
*
- * AppArmor sets confinement on every task, via the the aa_task_cxt and
- * the aa_task_cxt.profile, both of which are required and are not allowed
- * to be NULL. The aa_task_cxt is not reference counted and is unique
+ * AppArmor sets confinement on every task, via the the aa_task_ctx and
+ * the aa_task_ctx.profile, both of which are required and are not allowed
+ * to be NULL. The aa_task_ctx is not reference counted and is unique
* to each cred (which is reference count). The profile pointed to by
- * the task_cxt is reference counted.
+ * the task_ctx is reference counted.
*
* TODO
* If a task uses change_hat it currently does not return to the old
@@ -30,28 +30,28 @@
#include "include/policy.h"
/**
- * aa_alloc_task_context - allocate a new task_cxt
+ * aa_alloc_task_context - allocate a new task_ctx
* @flags: gfp flags for allocation
*
* Returns: allocated buffer or NULL on failure
*/
-struct aa_task_cxt *aa_alloc_task_context(gfp_t flags)
+struct aa_task_ctx *aa_alloc_task_context(gfp_t flags)
{
- return kzalloc(sizeof(struct aa_task_cxt), flags);
+ return kzalloc(sizeof(struct aa_task_ctx), flags);
}
/**
- * aa_free_task_context - free a task_cxt
- * @cxt: task_cxt to free (MAYBE NULL)
+ * aa_free_task_context - free a task_ctx
+ * @ctx: task_ctx to free (MAYBE NULL)
*/
-void aa_free_task_context(struct aa_task_cxt *cxt)
+void aa_free_task_context(struct aa_task_ctx *ctx)
{
- if (cxt) {
- aa_put_profile(cxt->profile);
- aa_put_profile(cxt->previous);
- aa_put_profile(cxt->onexec);
+ if (ctx) {
+ aa_put_profile(ctx->profile);
+ aa_put_profile(ctx->previous);
+ aa_put_profile(ctx->onexec);
- kzfree(cxt);
+ kzfree(ctx);
}
}
@@ -60,7 +60,7 @@ void aa_free_task_context(struct aa_task_cxt *cxt)
* @new: a blank task context (NOT NULL)
* @old: the task context to copy (NOT NULL)
*/
-void aa_dup_task_context(struct aa_task_cxt *new, const struct aa_task_cxt *old)
+void aa_dup_task_context(struct aa_task_ctx *new, const struct aa_task_ctx *old)
{
*new = *old;
aa_get_profile(new->profile);
@@ -93,31 +93,36 @@ struct aa_profile *aa_get_task_profile(struct task_struct *task)
*/
int aa_replace_current_profile(struct aa_profile *profile)
{
- struct aa_task_cxt *cxt = current_cxt();
+ struct aa_task_ctx *ctx = current_ctx();
struct cred *new;
- BUG_ON(!profile);
+ AA_BUG(!profile);
- if (cxt->profile == profile)
+ if (ctx->profile == profile)
return 0;
+ if (current_cred() != current_real_cred())
+ return -EBUSY;
+
new = prepare_creds();
if (!new)
return -ENOMEM;
- cxt = cred_cxt(new);
- if (unconfined(profile) || (cxt->profile->ns != profile->ns))
+ ctx = cred_ctx(new);
+ if (unconfined(profile) || (ctx->profile->ns != profile->ns))
/* if switching to unconfined or a different profile namespace
* clear out context state
*/
- aa_clear_task_cxt_trans(cxt);
+ aa_clear_task_ctx_trans(ctx);
- /* be careful switching cxt->profile, when racing replacement it
- * is possible that cxt->profile->replacedby->profile is the reference
+ /*
+ * be careful switching ctx->profile, when racing replacement it
+ * is possible that ctx->profile->proxy->profile is the reference
* keeping @profile valid, so make sure to get its reference before
- * dropping the reference on cxt->profile */
+ * dropping the reference on ctx->profile
+ */
aa_get_profile(profile);
- aa_put_profile(cxt->profile);
- cxt->profile = profile;
+ aa_put_profile(ctx->profile);
+ ctx->profile = profile;
commit_creds(new);
return 0;
@@ -131,15 +136,15 @@ int aa_replace_current_profile(struct aa_profile *profile)
*/
int aa_set_current_onexec(struct aa_profile *profile)
{
- struct aa_task_cxt *cxt;
+ struct aa_task_ctx *ctx;
struct cred *new = prepare_creds();
if (!new)
return -ENOMEM;
- cxt = cred_cxt(new);
+ ctx = cred_ctx(new);
aa_get_profile(profile);
- aa_put_profile(cxt->onexec);
- cxt->onexec = profile;
+ aa_put_profile(ctx->onexec);
+ ctx->onexec = profile;
commit_creds(new);
return 0;
@@ -157,28 +162,28 @@ int aa_set_current_onexec(struct aa_profile *profile)
*/
int aa_set_current_hat(struct aa_profile *profile, u64 token)
{
- struct aa_task_cxt *cxt;
+ struct aa_task_ctx *ctx;
struct cred *new = prepare_creds();
if (!new)
return -ENOMEM;
- BUG_ON(!profile);
+ AA_BUG(!profile);
- cxt = cred_cxt(new);
- if (!cxt->previous) {
+ ctx = cred_ctx(new);
+ if (!ctx->previous) {
/* transfer refcount */
- cxt->previous = cxt->profile;
- cxt->token = token;
- } else if (cxt->token == token) {
- aa_put_profile(cxt->profile);
+ ctx->previous = ctx->profile;
+ ctx->token = token;
+ } else if (ctx->token == token) {
+ aa_put_profile(ctx->profile);
} else {
- /* previous_profile && cxt->token != token */
+ /* previous_profile && ctx->token != token */
abort_creds(new);
return -EACCES;
}
- cxt->profile = aa_get_newest_profile(profile);
+ ctx->profile = aa_get_newest_profile(profile);
/* clear exec on switching context */
- aa_put_profile(cxt->onexec);
- cxt->onexec = NULL;
+ aa_put_profile(ctx->onexec);
+ ctx->onexec = NULL;
commit_creds(new);
return 0;
@@ -195,27 +200,27 @@ int aa_set_current_hat(struct aa_profile *profile, u64 token)
*/
int aa_restore_previous_profile(u64 token)
{
- struct aa_task_cxt *cxt;
+ struct aa_task_ctx *ctx;
struct cred *new = prepare_creds();
if (!new)
return -ENOMEM;
- cxt = cred_cxt(new);
- if (cxt->token != token) {
+ ctx = cred_ctx(new);
+ if (ctx->token != token) {
abort_creds(new);
return -EACCES;
}
/* ignore restores when there is no saved profile */
- if (!cxt->previous) {
+ if (!ctx->previous) {
abort_creds(new);
return 0;
}
- aa_put_profile(cxt->profile);
- cxt->profile = aa_get_newest_profile(cxt->previous);
- BUG_ON(!cxt->profile);
+ aa_put_profile(ctx->profile);
+ ctx->profile = aa_get_newest_profile(ctx->previous);
+ AA_BUG(!ctx->profile);
/* clear exec && prev information when restoring to previous context */
- aa_clear_task_cxt_trans(cxt);
+ aa_clear_task_ctx_trans(ctx);
commit_creds(new);
return 0;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 12:56:35 +0000