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-rw-r--r--kernel/auditsc.c131
1 files changed, 63 insertions, 68 deletions
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 51e735aedf58..6593a5207fb0 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -830,44 +830,6 @@ void audit_filter_inodes(struct task_struct *tsk, struct audit_context *ctx)
rcu_read_unlock();
}
-/* Transfer the audit context pointer to the caller, clearing it in the tsk's struct */
-static inline struct audit_context *audit_take_context(struct task_struct *tsk,
- int return_valid,
- long return_code)
-{
- struct audit_context *context = tsk->audit_context;
-
- if (!context)
- return NULL;
- context->return_valid = return_valid;
-
- /*
- * we need to fix up the return code in the audit logs if the actual
- * return codes are later going to be fixed up by the arch specific
- * signal handlers
- *
- * This is actually a test for:
- * (rc == ERESTARTSYS ) || (rc == ERESTARTNOINTR) ||
- * (rc == ERESTARTNOHAND) || (rc == ERESTART_RESTARTBLOCK)
- *
- * but is faster than a bunch of ||
- */
- if (unlikely(return_code <= -ERESTARTSYS) &&
- (return_code >= -ERESTART_RESTARTBLOCK) &&
- (return_code != -ENOIOCTLCMD))
- context->return_code = -EINTR;
- else
- context->return_code = return_code;
-
- if (context->in_syscall && !context->dummy) {
- audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_EXIT]);
- audit_filter_inodes(tsk, context);
- }
-
- audit_set_context(tsk, NULL);
- return context;
-}
-
static inline void audit_proctitle_free(struct audit_context *context)
{
kfree(context->proctitle.value);
@@ -1296,15 +1258,18 @@ static inline int audit_proctitle_rtrim(char *proctitle, int len)
return len;
}
-static void audit_log_proctitle(struct task_struct *tsk,
- struct audit_context *context)
+static void audit_log_proctitle(void)
{
int res;
char *buf;
char *msg = "(null)";
int len = strlen(msg);
+ struct audit_context *context = audit_context();
struct audit_buffer *ab;
+ if (!context || context->dummy)
+ return;
+
ab = audit_log_start(context, GFP_KERNEL, AUDIT_PROCTITLE);
if (!ab)
return; /* audit_panic or being filtered */
@@ -1317,7 +1282,7 @@ static void audit_log_proctitle(struct task_struct *tsk,
if (!buf)
goto out;
/* Historically called this from procfs naming */
- res = get_cmdline(tsk, buf, MAX_PROCTITLE_AUDIT_LEN);
+ res = get_cmdline(current, buf, MAX_PROCTITLE_AUDIT_LEN);
if (res == 0) {
kfree(buf);
goto out;
@@ -1337,15 +1302,15 @@ out:
audit_log_end(ab);
}
-static void audit_log_exit(struct audit_context *context, struct task_struct *tsk)
+static void audit_log_exit(void)
{
int i, call_panic = 0;
+ struct audit_context *context = audit_context();
struct audit_buffer *ab;
struct audit_aux_data *aux;
struct audit_names *n;
- /* tsk == current */
- context->personality = tsk->personality;
+ context->personality = current->personality;
ab = audit_log_start(context, GFP_KERNEL, AUDIT_SYSCALL);
if (!ab)
@@ -1367,7 +1332,7 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
context->argv[3],
context->name_count);
- audit_log_task_info(ab, tsk);
+ audit_log_task_info(ab);
audit_log_key(ab, context->filterkey);
audit_log_end(ab);
@@ -1456,7 +1421,7 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
audit_log_name(context, n, NULL, i++, &call_panic);
}
- audit_log_proctitle(tsk, context);
+ audit_log_proctitle();
/* Send end of event record to help user space know we are finished */
ab = audit_log_start(context, GFP_KERNEL, AUDIT_EOE);
@@ -1474,22 +1439,31 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
*/
void __audit_free(struct task_struct *tsk)
{
- struct audit_context *context;
+ struct audit_context *context = tsk->audit_context;
- context = audit_take_context(tsk, 0, 0);
if (!context)
return;
- /* Check for system calls that do not go through the exit
- * function (e.g., exit_group), then free context block.
- * We use GFP_ATOMIC here because we might be doing this
- * in the context of the idle thread */
- /* that can happen only if we are called from do_exit() */
- if (context->in_syscall && context->current_state == AUDIT_RECORD_CONTEXT)
- audit_log_exit(context, tsk);
+ /* We are called either by do_exit() or the fork() error handling code;
+ * in the former case tsk == current and in the latter tsk is a
+ * random task_struct that doesn't doesn't have any meaningful data we
+ * need to log via audit_log_exit().
+ */
+ if (tsk == current && !context->dummy && context->in_syscall) {
+ context->return_valid = 0;
+ context->return_code = 0;
+
+ audit_filter_syscall(tsk, context,
+ &audit_filter_list[AUDIT_FILTER_EXIT]);
+ audit_filter_inodes(tsk, context);
+ if (context->current_state == AUDIT_RECORD_CONTEXT)
+ audit_log_exit();
+ }
+
if (!list_empty(&context->killed_trees))
audit_kill_trees(&context->killed_trees);
+ audit_set_context(tsk, NULL);
audit_free_context(context);
}
@@ -1559,17 +1533,40 @@ void __audit_syscall_exit(int success, long return_code)
{
struct audit_context *context;
- if (success)
- success = AUDITSC_SUCCESS;
- else
- success = AUDITSC_FAILURE;
-
- context = audit_take_context(current, success, return_code);
+ context = audit_context();
if (!context)
return;
- if (context->in_syscall && context->current_state == AUDIT_RECORD_CONTEXT)
- audit_log_exit(context, current);
+ if (!context->dummy && context->in_syscall) {
+ if (success)
+ context->return_valid = AUDITSC_SUCCESS;
+ else
+ context->return_valid = AUDITSC_FAILURE;
+
+ /*
+ * we need to fix up the return code in the audit logs if the
+ * actual return codes are later going to be fixed up by the
+ * arch specific signal handlers
+ *
+ * This is actually a test for:
+ * (rc == ERESTARTSYS ) || (rc == ERESTARTNOINTR) ||
+ * (rc == ERESTARTNOHAND) || (rc == ERESTART_RESTARTBLOCK)
+ *
+ * but is faster than a bunch of ||
+ */
+ if (unlikely(return_code <= -ERESTARTSYS) &&
+ (return_code >= -ERESTART_RESTARTBLOCK) &&
+ (return_code != -ENOIOCTLCMD))
+ context->return_code = -EINTR;
+ else
+ context->return_code = return_code;
+
+ audit_filter_syscall(current, context,
+ &audit_filter_list[AUDIT_FILTER_EXIT]);
+ audit_filter_inodes(current, context);
+ if (context->current_state == AUDIT_RECORD_CONTEXT)
+ audit_log_exit();
+ }
context->in_syscall = 0;
context->prio = context->state == AUDIT_RECORD_CONTEXT ? ~0ULL : 0;
@@ -1591,7 +1588,6 @@ void __audit_syscall_exit(int success, long return_code)
kfree(context->filterkey);
context->filterkey = NULL;
}
- audit_set_context(current, context);
}
static inline void handle_one(const struct inode *inode)
@@ -2025,7 +2021,7 @@ static void audit_log_set_loginuid(kuid_t koldloginuid, kuid_t kloginuid,
uid = from_kuid(&init_user_ns, task_uid(current));
oldloginuid = from_kuid(&init_user_ns, koldloginuid);
loginuid = from_kuid(&init_user_ns, kloginuid),
- tty = audit_get_tty(current);
+ tty = audit_get_tty();
audit_log_format(ab, "pid=%d uid=%u", task_tgid_nr(current), uid);
audit_log_task_context(ab);
@@ -2046,7 +2042,6 @@ static void audit_log_set_loginuid(kuid_t koldloginuid, kuid_t kloginuid,
*/
int audit_set_loginuid(kuid_t loginuid)
{
- struct task_struct *task = current;
unsigned int oldsessionid, sessionid = AUDIT_SID_UNSET;
kuid_t oldloginuid;
int rc;
@@ -2065,8 +2060,8 @@ int audit_set_loginuid(kuid_t loginuid)
sessionid = (unsigned int)atomic_inc_return(&session_id);
}
- task->sessionid = sessionid;
- task->loginuid = loginuid;
+ current->sessionid = sessionid;
+ current->loginuid = loginuid;
out:
audit_log_set_loginuid(oldloginuid, loginuid, oldsessionid, sessionid, rc);
return rc;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-15 23:42:36 +0000