From: Florian Fainelli f.fainelli@gmail.com
commit 55f53567afe5f0cd2fd9e006b174c08c31c466f8 upstream.
Our statistics strings are allocated at initialization without being bound to a specific size, yet, we would copy ETH_GSTRING_LEN bytes using memcpy() which would create out of bounds accesses, this was flagged by KASAN. Replace this with strlcpy() to make sure we are bound the source buffer size and we also always NUL-terminate strings.
Fixes: 2b2427d06426 ("phy: micrel: Add ethtool statistics counters") Signed-off-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/micrel.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/net/phy/micrel.c +++ b/drivers/net/phy/micrel.c @@ -677,8 +677,8 @@ static void kszphy_get_strings(struct ph int i;
for (i = 0; i < ARRAY_SIZE(kszphy_hw_stats); i++) { - memcpy(data + i * ETH_GSTRING_LEN, - kszphy_hw_stats[i].string, ETH_GSTRING_LEN); + strlcpy(data + i * ETH_GSTRING_LEN, + kszphy_hw_stats[i].string, ETH_GSTRING_LEN); } }