The patch titled
Task watchers: register audit task watcher
has been added to the -mm tree. Its filename is
task-watchers-register-audit-task-watcher.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Task watchers: register audit task watcher
From: Matt Helsley <matthltc@xxxxxxxxxx>
Adapt audit to use task watchers.
Signed-off-by: Matt Helsley <matthltc@xxxxxxxxxx>
Cc: David Woodhouse <dwmw2@xxxxxxxxxxxxx>
Cc: <linux-audit@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
kernel/audit.c | 25 ++++++++++++++++++++++++-
kernel/exit.c | 3 ---
kernel/fork.c | 7 +------
3 files changed, 25 insertions(+), 10 deletions(-)
diff -puN kernel/audit.c~task-watchers-register-audit-task-watcher kernel/audit.c
--- a/kernel/audit.c~task-watchers-register-audit-task-watcher
+++ a/kernel/audit.c
@@ -48,6 +48,7 @@
#include <linux/module.h>
#include <linux/err.h>
#include <linux/kthread.h>
+#include <linux/notifier.h>
#include <linux/audit.h>
@@ -66,6 +67,26 @@ static int audit_initialized;
/* No syscall auditing will take place unless audit_enabled != 0. */
int audit_enabled;
+static int audit_task(struct notifier_block *nb, unsigned long val, void *t)
+{
+ struct task_struct *tsk = t;
+
+ switch(get_watch_event(val)) {
+ case WATCH_TASK_INIT:
+ /* Hack: -EFOO sets NOTIFY_STOP_MASK */
+ return audit_alloc(tsk);
+ case WATCH_TASK_FREE:
+ if (unlikely(tsk->audit_context))
+ audit_free(tsk);
+ default:
+ return NOTIFY_DONE;
+ }
+}
+
+static struct notifier_block __read_mostly audit_watch_tasks_nb = {
+ .notifier_call = audit_task,
+};
+
/* Default state when kernel boots without any parameters. */
static int audit_default;
@@ -709,8 +730,10 @@ static int __init audit_enable(char *str
printk(KERN_INFO "audit: %s%s\n",
audit_default ? "enabled" : "disabled",
audit_initialized ? "" : " (after initialization)");
- if (audit_initialized)
+ if (audit_initialized) {
audit_enabled = audit_default;
+ register_task_watcher(&audit_watch_tasks_nb);
+ }
return 1;
}
diff -puN kernel/exit.c~task-watchers-register-audit-task-watcher kernel/exit.c
--- a/kernel/exit.c~task-watchers-register-audit-task-watcher
+++ a/kernel/exit.c
@@ -37,7 +37,6 @@
#include <linux/futex.h>
#include <linux/compat.h>
#include <linux/pipe_fs_i.h>
-#include <linux/audit.h> /* for audit_free() */
#include <linux/resource.h>
#include <linux/notifier.h>
@@ -908,8 +907,6 @@ fastcall NORET_TYPE void do_exit(long co
if (unlikely(tsk->compat_robust_list))
compat_exit_robust_list(tsk);
#endif
- if (unlikely(tsk->audit_context))
- audit_free(tsk);
tsk->exit_code = code;
taskstats_exit_send(tsk, tidstats, tgidstats);
taskstats_exit_free(tidstats, tgidstats);
diff -puN kernel/fork.c~task-watchers-register-audit-task-watcher kernel/fork.c
--- a/kernel/fork.c~task-watchers-register-audit-task-watcher
+++ a/kernel/fork.c
@@ -40,7 +40,6 @@
#include <linux/rcupdate.h>
#include <linux/ptrace.h>
#include <linux/mount.h>
-#include <linux/audit.h>
#include <linux/profile.h>
#include <linux/rmap.h>
#include <linux/acct.h>
@@ -1067,11 +1066,9 @@ static task_t *copy_process(unsigned lon
if ((retval = security_task_alloc(p)))
goto bad_fork_cleanup_policy;
- if ((retval = audit_alloc(p)))
- goto bad_fork_cleanup_security;
/* copy all the process information */
if ((retval = copy_semundo(clone_flags, p)))
- goto bad_fork_cleanup_audit;
+ goto bad_fork_cleanup_security;
if ((retval = copy_files(clone_flags, p)))
goto bad_fork_cleanup_semundo;
if ((retval = copy_fs(clone_flags, p)))
@@ -1249,8 +1246,6 @@ bad_fork_cleanup_files:
exit_files(p); /* blocking */
bad_fork_cleanup_semundo:
exit_sem(p);
-bad_fork_cleanup_audit:
- audit_free(p);
bad_fork_cleanup_security:
security_task_free(p);
notify_result = notify_watchers(WATCH_TASK_FREE, p);
_
Patches currently in -mm which might be from matthltc@xxxxxxxxxx are
process-events-header-cleanup.patch
process-events-license-change.patch
remove-unecessary-null-check-in-kernel-acctc.patch
mark-profile-notifier-blocks-__read_mostly.patch
task-watchers-task-watchers.patch
task-watchers-task-watchers-tidy.patch
task-watchers-register-process-events-task-watcher.patch
task-watchers-refactor-process-events.patch
task-watchers-make-process-events-configurable-as.patch
task-watchers-allow-task-watchers-to-block.patch
task-watchers-register-audit-task-watcher.patch
task-watchers-register-per-task-delay-accounting.patch
task-watchers-register-profile-as-a-task-watcher.patch
task-watchers-add-support-for-per-task-watchers.patch
task-watchers-register-semundo-task-watcher.patch
task-watchers-register-per-task-semundo-watcher.patch
ipc-replace-kmalloc-and-memset-in-get_undo_list-with-kzalloc.patch
-
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