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authorAndrew Lunn <andrew@lunn.ch>2019-04-25 00:33:00 +0200
committerDavid S. Miller <davem@davemloft.net>2019-04-26 12:06:14 -0400
commitfdfdf86720a34527f777cbe0d8599bf0528fa146 (patch)
treed73687fe5b1629b5ed92ff1c0c435add7141f2ca /drivers/net/phy
parent4e43df38a2e6c876d3c8ecc4196ed67a895c425d (diff)
downloadlinux-fdfdf86720a34527f777cbe0d8599bf0528fa146.tar.bz2
net: phy: marvell: Fix buffer overrun with stats counters
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>
Diffstat (limited to 'drivers/net/phy')
-rw-r--r--drivers/net/phy/marvell.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c
index 3ccba37bd6dd..f76c4048b978 100644
--- a/drivers/net/phy/marvell.c
+++ b/drivers/net/phy/marvell.c
@@ -1489,9 +1489,10 @@ static int marvell_get_sset_count(struct phy_device *phydev)
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++) {
strlcpy(data + i * ETH_GSTRING_LEN,
marvell_hw_stats[i].string, ETH_GSTRING_LEN);
}
@@ -1519,9 +1520,10 @@ static u64 marvell_get_stat(struct phy_device *phydev, int i)
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);
}