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[ Upstream commitfdfdf86720] marvell_get_sset_count() returns how many statistics counters there are. If the PHY supports fibre, there are 3, otherwise two. marvell_get_strings() does not make this distinction, and always returns 3 strings. This then often results in writing past the end of the buffer for the strings. Fixes:2170fef78a("Marvell phy: add field to get errors from fiber link.") Signed-off-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>