vhost: create worker at end of vhost_dev_set_owner

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vsock can start queueing work after VHOST_VSOCK_SET_GUEST_CID, so
after we have called vhost_worker_create it can be calling
vhost_work_queue and trying to access the vhost worker/task. If
vhost_dev_alloc_iovecs fails, then vhost_worker_free could free
the worker/task from under vsock.

This moves vhost_worker_create to the end of vhost_dev_set_owner
where we know we can no longer fail in that path. If it fails
after the VHOST_SET_OWNER and userspace closes the device, then
the normal vsock release handling will do the right thing.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
Message-Id: <20230626232307.97930-2-michael.christie@oracle.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

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Mike Christie 2023-06-26 18:22:51 -05:00 • committed by Michael S. Tsirkin

parent 3845308fc8

commit 3e11c6eb6a

1 changed files with 13 additions and 6 deletions

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drivers/vhost/vhost.c

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