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authorAl Viro <viro@zeniv.linux.org.uk>2006-08-03 10:59:26 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2006-08-03 10:59:26 -0400
commitd51374adf5f2f88155a072d3d801104e3c0c3d7f (patch)
tree2b87e74cdb43fca5635cc25fb5a419cbb686ce00
parent471a5c7c839114cc8b55876203aeb2817c33e3c5 (diff)
[PATCH] mark context of syscall entered with no rules as dummy
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--include/linux/audit.h6
-rw-r--r--kernel/auditsc.c6
2 files changed, 10 insertions, 2 deletions
diff --git a/include/linux/audit.h b/include/linux/audit.h
index f1bfcff497b..3f736d65821 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -329,6 +329,11 @@ extern void __audit_inode(const char *name, const struct inode *inode);
extern void __audit_inode_child(const char *dname, const struct inode *inode,
const struct inode *parent);
extern void __audit_inode_update(const struct inode *inode);
+static inline int audit_dummy_context(void)
+{
+ void *p = current->audit_context;
+ return !p || *(int *)p;
+}
static inline void audit_getname(const char *name)
{
if (unlikely(current->audit_context))
@@ -416,6 +421,7 @@ extern int audit_n_rules;
#define audit_free(t) do { ; } while (0)
#define audit_syscall_entry(ta,a,b,c,d,e) do { ; } while (0)
#define audit_syscall_exit(f,r) do { ; } while (0)
+#define audit_dummy_context() 1
#define audit_getname(n) do { ; } while (0)
#define audit_putname(n) do { ; } while (0)
#define __audit_inode(n,i) do { ; } while (0)
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 3ea836d3d94..9618d150725 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -177,6 +177,7 @@ struct audit_aux_data_path {
/* The per-task audit context. */
struct audit_context {
+ int dummy; /* must be the first element */
int in_syscall; /* 1 if task is in a syscall */
enum audit_state state;
unsigned int serial; /* serial number for record */
@@ -517,7 +518,7 @@ static inline struct audit_context *audit_get_context(struct task_struct *tsk,
context->return_valid = return_valid;
context->return_code = return_code;
- if (context->in_syscall && !context->auditable) {
+ if (context->in_syscall && !context->dummy && !context->auditable) {
enum audit_state state;
state = audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_EXIT]);
@@ -1069,7 +1070,8 @@ void audit_syscall_entry(int arch, int major,
context->argv[3] = a4;
state = context->state;
- if (state == AUDIT_SETUP_CONTEXT || state == AUDIT_BUILD_CONTEXT)
+ context->dummy = !audit_n_rules;
+ if (!context->dummy && (state == AUDIT_SETUP_CONTEXT || state == AUDIT_BUILD_CONTEXT))
state = audit_filter_syscall(tsk, context, &audit_filter_list[AUDIT_FILTER_ENTRY]);
if (likely(state == AUDIT_DISABLED))
return;