Mike ChristieandGreg Kroah-Hartman 8f174c5db1 vhost-scsi: Handle vhost_vq_work_queue failures for events ...

[ Upstream commit b1b2ce58ed ]

Currently, we can try to queue an event's work before the vhost_task is
created. When this happens we just drop it in vhost_scsi_do_plug before
even calling vhost_vq_work_queue. During a device shutdown we do the
same thing after vhost_scsi_clear_endpoint has cleared the backends.

In the next patches we will be able to kill the vhost_task before we
have cleared the endpoint. In that case, vhost_vq_work_queue can fail
and we will leak the event's memory. This has handle the failure by
just freeing the event. This is safe to do, because
vhost_vq_work_queue will only return failure for us when the vhost_task
is killed and so userspace will not be able to handle events if we
sent them.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
Message-Id: <20240316004707.45557-2-michael.christie@oracle.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2024-07-11 12:49:20 +02:00

..

iotlb.c

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Kconfig

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Makefile

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net.c

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scsi.c

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test.c

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test.h

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vdpa.c

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vhost.c

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vhost.h

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vringh.c

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vsock.c

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