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xen/blkfront: harden blkfront against event channel storms
authorJuergen Gross <jgross@suse.com>
Thu, 16 Dec 2021 07:24:08 +0000 (08:24 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 22 Dec 2021 08:05:15 +0000 (09:05 +0100)
commit25898389795bd85d8e1520c0c75c3ad906c17da7
tree28711f0b8e08f43626fabefc11cb91c132ba2472tree | snapshot
parent4e2dfb5ae3e0c8fdb073abf1e352195ac255cc1acommit | diff
xen/blkfront: harden blkfront against event channel storms

commit 0fd08a34e8e3b67ec9bd8287ac0facf8374b844a upstream.

The Xen blkfront driver is still vulnerable for an attack via excessive
number of events sent by the backend. Fix that by using lateeoi event
channels.

This is part of XSA-391

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/block/xen-blkfront.c diff | blob | history
wrapfs-4.14.y