audit: move audit_aux_data_execve contents into audit_context union

audit_bprm() was being called to add an AUDIT_EXECVE record to the audit
context every time search_binary_handler() was recursively called.  Only one
reference is necessary, so just update it.  Move the the contents of
audit_aux_data_execve into the union in audit_context, removing dependence on a
kmalloc along the way.

Reported-by: Oleg Nesterov <onestero@redhat.com>
Cc: Eric Paris <eparis@redhat.com>
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Eric Paris <eparis@redhat.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/kernel/audit.h b/kernel/audit.h
index 123c9b7c3979..e7b94ab66c49 100644
--- a/kernel/audit.h
+++ b/kernel/audit.h
@@ -197,6 +197,10 @@ struct audit_context {
 			int			fd;
 			int			flags;
 		} mmap;
+		struct {
+			int			argc;
+			struct mm_struct	*mm;
+		} execve;
 	};
 	int fds[2];