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kernel_optimize_test/drivers/vhost
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Jason Wang 3b8b639966 vhost-vdpa: fix vm_flags for virtqueue doorbell mapping 
commit 3a3e0fad16d40a2aa68ddf7eea4acdf48b22dd44 upstream.

The virtqueue doorbell is usually implemented via registeres but we
don't provide the necessary vma->flags like VM_PFNMAP. This may cause
several issues e.g when userspace tries to map the doorbell via vhost
IOTLB, kernel may panic due to the page is not backed by page
structure. This patch fixes this by setting the necessary
vm_flags. With this patch, try to map doorbell via IOTLB will fail
with bad address.

Cc: stable@vger.kernel.org
Fixes: ddd89d0a05 ("vhost_vdpa: support doorbell mapping via mmap")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210413091557.29008-1-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-11 14:47:12 +02:00
..
iotlb.c vhost: Fix documentation 2020-09-24 05:54:36 -04:00
Kconfig vhost_vdpa: implement IRQ offloading in vhost_vdpa 2020-08-05 11:08:42 -04:00
Makefile
net.c vhost_net: fix ubuf refcount incorrectly when sendmsg fails 2021-01-12 20:18:13 +01:00
scsi.c vhost scsi: fix error return code in vhost_scsi_set_endpoint() 2020-12-30 11:54:00 +01:00
test.c tools/virtio: Add --reset 2020-06-22 12:34:21 -04:00
test.h tools/virtio: Add --reset 2020-06-22 12:34:21 -04:00
vdpa.c vhost-vdpa: fix vm_flags for virtqueue doorbell mapping 2021-05-11 14:47:12 +02:00
vhost.c vhost: Fix vhost_vq_reset() 2021-04-07 15:00:05 +02:00
vhost.h vhost: add helper to check if a vq has been setup 2020-11-15 17:30:54 -05:00
vringh.c vringh: fix vringh_iov_push_*() documentation 2020-11-25 04:22:48 -05:00
vsock.c vhost: allow device that does not depend on vhost worker 2020-06-04 15:36:51 -04:00