Nicholas Bellinger 60a01f558a vhost/scsi: Fix incorrect usage of get_user_pages_fast write parameter ... This patch addresses a long-standing bug where the get_user_pages_fast() write parameter used for setting the underlying page table entry permission bits was incorrectly set to write=1 for data_direction=DMA_TO_DEVICE, and passed into get_user_pages_fast() via vhost_scsi_map_iov_to_sgl(). However, this parameter is intended to signal WRITEs to pinned userspace PTEs for the virtio-scsi DMA_FROM_DEVICE -> READ payload case, and *not* for the virtio-scsi DMA_TO_DEVICE -> WRITE payload case. This bug would manifest itself as random process segmentation faults on KVM host after repeated vhost starts + stops and/or with lots of vhost endpoints + LUNs. Cc: Stefan Hajnoczi <stefanha@redhat.com> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Asias He <asias@redhat.com> Cc: <stable@vger.kernel.org> # 3.6+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>		2013-10-25 11:03:34 -07:00
..
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: correctly limit the max pending buffers	2013-09-03 22:46:58 -04:00
scsi.c	vhost/scsi: Fix incorrect usage of get_user_pages_fast write parameter	2013-10-25 11:03:34 -07:00
test.c	vhost: Remove custom vhost rcu usage	2013-07-11 15:38:40 +03:00
test.h
vhost.c	vhost: wake up worker outside spin_lock	2013-09-17 09:21:32 +03:00
vhost.h	vhost: Remove custom vhost rcu usage	2013-07-11 15:38:40 +03:00
vringh.c	Add missing module license tag to vring helpers.	2013-05-08 10:49:03 +09:30