arinc653: don't leak hypervisor stack contents through XEN_SYSCTL_SCHEDOP_getinfo

Note that due to XSA-77 this is not a security issue.

Reported-by: "栾尚聪(好风)" <shangcong.lsc@alibaba-inc.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by Robert VanVossen <robert.vanvossen@dornerworks.com>

diff --git a/xen/common/sched_arinc653.c b/xen/common/sched_arinc653.c
index 819b8691937a7ea86b1664e07edccefb9fedad12..cff5da9d9912a8bd08c738b91329d4772984081b 100644 (file)
--- a/xen/common/sched_arinc653.c
+++ b/xen/common/sched_arinc653.c
@@ -705,6 +705,7 @@ a653sched_adjust_global(const struct scheduler *ops,
         rc = arinc653_sched_set(ops, &local_sched);
         break;
     case XEN_SYSCTL_SCHEDOP_getinfo:
+        memset(&local_sched, -1, sizeof(local_sched));
         rc = arinc653_sched_get(ops, &local_sched);
         if ( rc )
             break;