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From: Jason Wang <>
Cc:,,,, Jason Wang <>
Subject: [PATCH] dpaa2-eth: Replace strlcpy with strscpy
Date: Mon, 30 Aug 2021 21:05:31 +0800	[thread overview]
Message-ID: <> (raw)

The strlcpy should not be used because it doesn't limit the source
length. As linus says, it's a completely useless function if you
can't implicitly trust the source string - but that is almost always
why people think they should use it! All in all the BSD function
will lead some potential bugs.

But the strscpy doesn't require reading memory from the src string
beyond the specified "count" bytes, and since the return value is
easier to error-check than strlcpy()'s. In addition, the implementation
is robust to the string changing out from underneath it, unlike the
current strlcpy() implementation.

Thus, We prefer using strscpy instead of strlcpy.

Signed-off-by: Jason Wang <>
 drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c
index ad5e374eeccf..2da5f881f630 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c
@@ -72,12 +72,12 @@ static void dpaa2_eth_get_drvinfo(struct net_device *net_dev,
 	struct dpaa2_eth_priv *priv = netdev_priv(net_dev);
-	strlcpy(drvinfo->driver, KBUILD_MODNAME, sizeof(drvinfo->driver));
+	strscpy(drvinfo->driver, KBUILD_MODNAME, sizeof(drvinfo->driver));
 	snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
 		 "%u.%u", priv->dpni_ver_major, priv->dpni_ver_minor);
-	strlcpy(drvinfo->bus_info, dev_name(net_dev->dev.parent->parent),
+	strscpy(drvinfo->bus_info, dev_name(net_dev->dev.parent->parent),
@@ -191,11 +191,11 @@ static void dpaa2_eth_get_strings(struct net_device *netdev, u32 stringset,
 	switch (stringset) {
 	case ETH_SS_STATS:
 		for (i = 0; i < DPAA2_ETH_NUM_STATS; i++) {
-			strlcpy(p, dpaa2_ethtool_stats[i], ETH_GSTRING_LEN);
+			strscpy(p, dpaa2_ethtool_stats[i], ETH_GSTRING_LEN);
 		for (i = 0; i < DPAA2_ETH_NUM_EXTRA_STATS; i++) {
-			strlcpy(p, dpaa2_ethtool_extras[i], ETH_GSTRING_LEN);
+			strscpy(p, dpaa2_ethtool_extras[i], ETH_GSTRING_LEN);
 		if (dpaa2_eth_has_mac(priv))

             reply	other threads:[~2021-08-30 13:06 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-30 13:05 Jason Wang [this message]
2021-08-31 11:10 ` patchwork-bot+netdevbpf

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