linux-kernel - [PATCH 5.19 078/365] virtio: VIRTIO_HARDEN

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Date:   Tue, 23 Aug 2022 09:59:39 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, "Jason Wang" <jasowang@...hat.com>,
        "Michael S. Tsirkin" <mst@...hat.com>
Subject: [PATCH 5.19 078/365] virtio: VIRTIO_HARDEN_NOTIFICATION is broken

From: Michael S. Tsirkin <mst@...hat.com>

commit ebe797f25f68f28581f46a9cb9c1997ac15c39a0 upstream.

This option doesn't really work and breaks too many drivers.
Not yet sure what's the right thing to do, for now
let's make sure randconfig isn't broken by this.

Fixes: c346dae4f3fb ("virtio: disable notification hardening by default")
Cc: "Jason Wang" <jasowang@...hat.com>
Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
Acked-by: Jason Wang <jasowang@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/virtio/Kconfig |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/virtio/Kconfig
+++ b/drivers/virtio/Kconfig
@@ -35,11 +35,12 @@ if VIRTIO_MENU
 
 config VIRTIO_HARDEN_NOTIFICATION
         bool "Harden virtio notification"
+        depends on BROKEN
         help
           Enable this to harden the device notifications and suppress
           those that happen at a time where notifications are illegal.
 
-          Experimental: Note that several drivers still have bugs that
+          Experimental: Note that several drivers still have issues that
           may cause crashes or hangs when correct handling of
           notifications is enforced; depending on the subset of
           drivers and devices you use, this may or may not work.