From: Andrew Lunn andrew@lunn.ch
[ Upstream commit fdfdf86720a34527f777cbe0d8599bf0528fa146 ]
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: 2170fef78a40 ("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 --- drivers/net/phy/marvell.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/net/phy/marvell.c +++ b/drivers/net/phy/marvell.c @@ -1497,9 +1497,10 @@ static int marvell_get_sset_count(struct
static void marvell_get_strings(struct phy_device *phydev, u8 *data) { + int count = marvell_get_sset_count(phydev); int i;
- for (i = 0; i < ARRAY_SIZE(marvell_hw_stats); i++) { + for (i = 0; i < count; i++) { memcpy(data + i * ETH_GSTRING_LEN, marvell_hw_stats[i].string, ETH_GSTRING_LEN); } @@ -1536,9 +1537,10 @@ static u64 marvell_get_stat(struct phy_d static void marvell_get_stats(struct phy_device *phydev, struct ethtool_stats *stats, u64 *data) { + int count = marvell_get_sset_count(phydev); int i;
- for (i = 0; i < ARRAY_SIZE(marvell_hw_stats); i++) + for (i = 0; i < count; i++) data[i] = marvell_get_stat(phydev, i); }