From: Justin Stitt <justinstitt@google.com>
To: "Linus Walleij" <linus.walleij@linaro.org>,
"Alvin Šipraga" <alsi@bang-olufsen.dk>,
"Andrew Lunn" <andrew@lunn.ch>,
"Florian Fainelli" <f.fainelli@gmail.com>,
"Vladimir Oltean" <olteanv@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
"Eric Dumazet" <edumazet@google.com>,
"Jakub Kicinski" <kuba@kernel.org>,
"Paolo Abeni" <pabeni@redhat.com>
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-hardening@vger.kernel.org,
Justin Stitt <justinstitt@google.com>
Subject: [PATCH] net: dsa: realtek: replace deprecated strncpy with ethtool_sprintf
Date: Mon, 09 Oct 2023 22:47:37 +0000 [thread overview]
Message-ID: <20231009-strncpy-drivers-net-dsa-realtek-rtl8366-core-c-v1-1-74e1b5190778@google.com> (raw)
`strncpy` is deprecated for use on NUL-terminated destination strings
[1] and as such we should prefer more robust and less ambiguous string
interfaces.
ethtool_sprintf() is designed specifically for get_strings() usage.
Let's replace strncpy in favor of this more robust and easier to
understand interface.
Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [1]
Link: https://manpages.debian.org/testing/linux-manual-4.8/strscpy.9.en.html [2]
Link: https://github.com/KSPP/linux/issues/90
Cc: linux-hardening@vger.kernel.org
Signed-off-by: Justin Stitt <justinstitt@google.com>
---
Note: build-tested only.
---
drivers/net/dsa/realtek/rtl8366-core.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/drivers/net/dsa/realtek/rtl8366-core.c b/drivers/net/dsa/realtek/rtl8366-core.c
index dc5f75be3017..b13766a3acbb 100644
--- a/drivers/net/dsa/realtek/rtl8366-core.c
+++ b/drivers/net/dsa/realtek/rtl8366-core.c
@@ -395,16 +395,13 @@ void rtl8366_get_strings(struct dsa_switch *ds, int port, u32 stringset,
uint8_t *data)
{
struct realtek_priv *priv = ds->priv;
- struct rtl8366_mib_counter *mib;
int i;
if (port >= priv->num_ports)
return;
for (i = 0; i < priv->num_mib_counters; i++) {
- mib = &priv->mib_counters[i];
- strncpy(data + i * ETH_GSTRING_LEN,
- mib->name, ETH_GSTRING_LEN);
+ ethtool_sprintf(&data, "%s", priv->mib_counters[i].name);
}
}
EXPORT_SYMBOL_GPL(rtl8366_get_strings);
---
base-commit: cbf3a2cb156a2c911d8f38d8247814b4c07f49a2
change-id: 20231009-strncpy-drivers-net-dsa-realtek-rtl8366-core-c-60a0f0ddc5cc
Best regards,
--
Justin Stitt <justinstitt@google.com>
next reply other threads:[~2023-10-09 22:48 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-09 22:47 Justin Stitt [this message]
2023-10-09 22:53 ` [PATCH] net: dsa: realtek: replace deprecated strncpy with ethtool_sprintf Florian Fainelli
2023-10-10 9:08 ` Linus Walleij
2023-10-10 22:10 ` Vladimir Oltean
2023-10-11 3:10 ` patchwork-bot+netdevbpf
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20231009-strncpy-drivers-net-dsa-realtek-rtl8366-core-c-v1-1-74e1b5190778@google.com \
--to=justinstitt@google.com \
--cc=alsi@bang-olufsen.dk \
--cc=andrew@lunn.ch \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=f.fainelli@gmail.com \
--cc=kuba@kernel.org \
--cc=linus.walleij@linaro.org \
--cc=linux-hardening@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=olteanv@gmail.com \
--cc=pabeni@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.