vsock/virtio: update credit only if socket is not closed

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commit ce7536bc73 upstream.

If the socket is closed or is being released, some resources used by
virtio_transport_space_update() such as 'vsk->trans' may be released.

To avoid a use after free bug we should only update the available credit
when we are sure the socket is still open and we have the lock held.

Fixes: 06a8fc7836 ("VSOCK: Introduce virtio_vsock_common.ko")
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Link: https://lore.kernel.org/r/20210208144454.84438-1-sgarzare@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Stefano Garzarella 2021-02-08 15:44:54 +01:00 • committed by Greg Kroah-Hartman

parent ba3bcb35d7

commit afe3170160

1 changed files with 2 additions and 2 deletions

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net/vmw_vsock/virtio_transport_common.c

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