[PATCH 14/22] Audit: only allow init user namespace to change audit_failure

[Gao feng]

Setting audit_failure to AUDIT_FAIL_PANIC may
cause system panic.

We should disallow uninit user namesapce to change it.

Signed-off-by: Gao feng <gaofeng@xxxxxxxxxxxxxx>
---
 kernel/audit.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/audit.c b/kernel/audit.c
index 306231d..79a8b8e 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -327,6 +327,9 @@ static int audit_set_failure(int state)
 	    && state != AUDIT_FAIL_PANIC)
 		return -EINVAL;
 
+	if (current_user_ns() != &init_user_ns)
+		return -EPERM;
+
 	return audit_do_config_change("audit_failure", &audit_failure, state);
 }
 
-- 
1.8.1.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/