lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date: Tue, 03 Oct 2023 22:23:07 +0000
From: Justin Stitt <>
To: Arnd Bergmann <>, Greg Kroah-Hartman <>
	Justin Stitt <>
Subject: [PATCH v2] drivers: misc: ti-st: 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

We expect both `kim_data->dev_name` and `kim_gdata->dev_name` to be

`kim_data->dev_name` seems to not require NUL-padding.

`kim_gdata` is already zero-allocated and as such does not require
|       kim_gdata = kzalloc(sizeof(struct kim_data_s), GFP_KERNEL);

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.

Let's also opt to use the more idiomatic strscpy usage of:
strscpy(dest, src, sizeof(dest))

Link: [1]
Link: [2]
Signed-off-by: Justin Stitt <>
Changes in v2:
- use sizeof(dest) (thanks Kees)
- rebase onto mainline cbf3a2cb156a2c91
- Link to v1:
Note: build-tested only.
 drivers/misc/ti-st/st_kim.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/ti-st/st_kim.c b/drivers/misc/ti-st/st_kim.c
index fe682e0553b2..4b1be0bb6ac0 100644
--- a/drivers/misc/ti-st/st_kim.c
+++ b/drivers/misc/ti-st/st_kim.c
@@ -590,7 +590,7 @@ static ssize_t store_dev_name(struct device *dev,
 	struct kim_data_s *kim_data = dev_get_drvdata(dev);
 	pr_debug("storing dev name >%s<", buf);
-	strncpy(kim_data->dev_name, buf, count);
+	strscpy(kim_data->dev_name, buf, sizeof(kim_data->dev_name));
 	pr_debug("stored dev name >%s<", kim_data->dev_name);
 	return count;
@@ -751,7 +751,8 @@ static int kim_probe(struct platform_device *pdev)
 	/* copying platform data */
-	strncpy(kim_gdata->dev_name, pdata->dev_name, UART_DEV_NAME_LEN);
+	strscpy(kim_gdata->dev_name, pdata->dev_name,
+		sizeof(kim_gdata->dev_name));
 	kim_gdata->flow_cntrl = pdata->flow_cntrl;
 	kim_gdata->baud_rate = pdata->baud_rate;
 	pr_info("sysfs entries created\n");

base-commit: cbf3a2cb156a2c911d8f38d8247814b4c07f49a2
change-id: 20230927-strncpy-drivers-misc-ti-st-st_kim-c-e1663a211a0c

Best regards,
Justin Stitt <>

Powered by blists - more mailing lists