On 05/25/2015 07:28 PM, kernel@xxxxxxxxxxxxxxxx wrote:
From: Martin Sperl <kernel@xxxxxxxxxxxxxxxx> per spi-master statistics accessible as: /sys/class/spi_master/spi*/statistics/ per spi-device statistics accessible via: /sys/class/spi_master/spi*/spi*.*/statistics/ The following statistics are exposed as separate "files" inside these directories: * messages number of spi_messages * transfers number of spi_transfers * bytes number of bytes transferred * bytes_rx number of bytes transmitted * bytes_tx number of bytes received * bytes_histo transferred bytes/spi_transfer histogram
Having those kinds of stats in world readable files has serious security implications as they can be used to implement side-channel attacks. They should probably only be available in debugfs for root.
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