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linux/drivers/vhost
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Jason Wang 6c74f68cf3 vhost: scsi: add weight support 
commit c1ea02f15a upstream.

This patch will check the weight and exit the loop if we exceeds the
weight. This is useful for preventing scsi kthread from hogging cpu
which is guest triggerable.

This addresses CVE-2019-3900.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Fixes: 057cbf49a1 ("tcm_vhost: Initial merge for vhost level target fabric driver")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
[bwh: Backported to 3.16:
 - Drop changes in vhost_scsi_ctl_handle_vq()
 - Adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
History 2019-08-13 12:39:24 +01:00
..
Kconfig vhost: Make vhost a separate module 2013-07-07 17:33:44 +03:00
Makefile vhost: Make vhost a separate module 2013-07-07 17:33:44 +03:00
net.c vhost_net: fix possible infinite loop 2019-08-13 12:39:24 +01:00
scsi.c vhost: scsi: add weight support 2019-08-13 12:39:24 +01:00
test.c vhost: move memory pointer to VQs 2014-06-09 16:21:07 +03:00
test.h vhost test module 2010-12-09 16:00:21 +02:00
vhost.c vhost: introduce vhost_exceeds_weight() 2019-08-13 12:39:24 +01:00
vhost.h vhost: introduce vhost_exceeds_weight() 2019-08-13 12:39:24 +01:00
vringh.c Add missing module license tag to vring helpers. 2013-05-08 10:49:03 +09:30