4.19-stable review patch. If anyone has any objections, please let me know.
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From: Hyunwoo Kim v4bel@theori.io
commit 6ca575374dd9a507cdd16dfa0e78c2e9e20bd05f upstream.
During loopback communication, a dangling pointer can be created in vsk->trans, potentially leading to a Use-After-Free condition. This issue is resolved by initializing vsk->trans to NULL.
Cc: stable stable@kernel.org Fixes: 06a8fc78367d ("VSOCK: Introduce virtio_vsock_common.ko") Signed-off-by: Hyunwoo Kim v4bel@theori.io Signed-off-by: Wongi Lee qwerty@theori.io Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Message-Id: 2024102245-strive-crib-c8d3@gregkh Signed-off-by: Michael S. Tsirkin mst@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/vmw_vsock/virtio_transport_common.c | 1 + 1 file changed, 1 insertion(+)
--- a/net/vmw_vsock/virtio_transport_common.c +++ b/net/vmw_vsock/virtio_transport_common.c @@ -646,6 +646,7 @@ void virtio_transport_destruct(struct vs struct virtio_vsock_sock *vvs = vsk->trans;
kfree(vvs); + vsk->trans = NULL; } EXPORT_SYMBOL_GPL(virtio_transport_destruct);