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commit c93ad1337ad06a718890a89cdd85188ff9a5a5cc upstream. If register_snap_client fails in atalk_init, error code should be set, otherwise it will triggers NULL pointer dereference while unloading module. Fixes: 9804501fa122 ("appletalk: Fix potential NULL pointer dereference in unregister_snap_client") Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>