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Message-ID: <20231011-strncpy-drivers-net-ethernet-pensando-ionic-ionic_main-c-v1-1-23c62a16ff58@google.com>
Date: Wed, 11 Oct 2023 21:53:44 +0000
From: Justin Stitt <justinstitt@...gle.com>
To: Shannon Nelson <shannon.nelson@....com>, Brett Creeley <brett.creeley@....com>, drivers@...sando.io,
"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-hardening@...r.kernel.org, Justin Stitt <justinstitt@...gle.com>
Subject: [PATCH] ionic: replace deprecated strncpy with strscpy
strncpy() is deprecated for use on NUL-terminated destination strings
[1] and as such we should prefer more robust and less ambiguous string
interfaces.
NUL-padding is not needed due to `ident` being memset'd to 0 just before
the copy.
Considering the above, a suitable replacement is `strscpy` [2] due to
the fact that it guarantees NUL-termination on the destination buffer
without unnecessarily NUL-padding.
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@...r.kernel.org
Signed-off-by: Justin Stitt <justinstitt@...gle.com>
---
Note: build-tested only.
Found with: $ rg "strncpy\("
---
drivers/net/ethernet/pensando/ionic/ionic_main.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_main.c b/drivers/net/ethernet/pensando/ionic/ionic_main.c
index 1dc79cecc5cc..835577392178 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_main.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_main.c
@@ -554,8 +554,8 @@ int ionic_identify(struct ionic *ionic)
memset(ident, 0, sizeof(*ident));
ident->drv.os_type = cpu_to_le32(IONIC_OS_TYPE_LINUX);
- strncpy(ident->drv.driver_ver_str, UTS_RELEASE,
- sizeof(ident->drv.driver_ver_str) - 1);
+ strscpy(ident->drv.driver_ver_str, UTS_RELEASE,
+ sizeof(ident->drv.driver_ver_str));
mutex_lock(&ionic->dev_cmd_lock);
---
base-commit: cbf3a2cb156a2c911d8f38d8247814b4c07f49a2
change-id: 20231011-strncpy-drivers-net-ethernet-pensando-ionic-ionic_main-c-709f8f1ea312
Best regards,
--
Justin Stitt <justinstitt@...gle.com>
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