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| author | Al Viro <viro@zeniv.linux.org.uk> | 2006-08-03 10:59:26 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2006-08-03 10:59:26 -0400 |
| commit | d51374adf5f2f88155a072d3d801104e3c0c3d7f (patch) | |
| tree | 2b87e74cdb43fca5635cc25fb5a419cbb686ce00 | |
| parent | 471a5c7c839114cc8b55876203aeb2817c33e3c5 (diff) | |
| download | lwn-d51374adf5f2f88155a072d3d801104e3c0c3d7f.tar.gz lwn-d51374adf5f2f88155a072d3d801104e3c0c3d7f.zip | |
[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.h | 6 | ||||
| -rw-r--r-- | kernel/auditsc.c | 6 |
2 files changed, 10 insertions, 2 deletions
diff --git a/include/linux/audit.h b/include/linux/audit.h index f1bfcff497bf..3f736d658218 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 3ea836d3d941..9618d1507251 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; |