From: "thermal-bot for Justin Stitt" <tip-bot2@linutronix.de>
To: linux-pm@vger.kernel.org
Cc: Justin Stitt <justinstitt@google.com>,
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
rui.zhang@intel.com, daniel.lezcano@linaro.org, amitk@kernel.org
Subject: [thermal: thermal/fixes] thermal: intel: int340x_thermal: replace deprecated strncpy() with strscpy()
Date: Tue, 14 May 2024 10:18:57 -0000 [thread overview]
Message-ID: <171568193743.10875.13256773729291529190.tip-bot2@tip-bot2> (raw)
The following commit has been merged into the thermal/fixes branch of thermal:
Commit-ID: 03fa9a3ad1d61992a2105aeb1062b349f1a85012
Gitweb: https://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux.git//03fa9a3ad1d61992a2105aeb1062b349f1a85012
Author: Justin Stitt <justinstitt@google.com>
AuthorDate: Mon, 18 Mar 2024 22:36:10
Committer: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
CommitterDate: Wed, 27 Mar 2024 14:57:44 +01:00
thermal: intel: int340x_thermal: 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.
psvt->limit.string can only be 8 bytes so let's use the appropriate size
macro ACPI_LIMIT_STR_MAX_LEN.
Neither psvt->limit.string or psvt_user[i].limit.string requires the
NUL-padding behavior that strncpy() provides as they have both been
filled with NUL-bytes prior to the string operation.
| memset(&psvt->limit, 0, sizeof(u64));
and
| psvt_user = kzalloc(psvt_len, GFP_KERNEL);
Let's use `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
Signed-off-by: Justin Stitt <justinstitt@google.com>
Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/thermal/intel/int340x_thermal/acpi_thermal_rel.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/thermal/intel/int340x_thermal/acpi_thermal_rel.c b/drivers/thermal/intel/int340x_thermal/acpi_thermal_rel.c
index dc519a6..4b4a4d6 100644
--- a/drivers/thermal/intel/int340x_thermal/acpi_thermal_rel.c
+++ b/drivers/thermal/intel/int340x_thermal/acpi_thermal_rel.c
@@ -309,7 +309,7 @@ static int acpi_parse_psvt(acpi_handle handle, int *psvt_count, struct psvt **ps
if (knob->type == ACPI_TYPE_STRING) {
memset(&psvt->limit, 0, sizeof(u64));
- strncpy(psvt->limit.string, psvt_ptr->limit.str_ptr, knob->string.length);
+ strscpy(psvt->limit.string, psvt_ptr->limit.str_ptr, ACPI_LIMIT_STR_MAX_LEN);
} else {
psvt->limit.integer = psvt_ptr->limit.integer;
}
@@ -468,7 +468,7 @@ static int fill_psvt(char __user *ubuf)
psvt_user[i].unlimit_coeff = psvts[i].unlimit_coeff;
psvt_user[i].control_knob_type = psvts[i].control_knob_type;
if (psvt_user[i].control_knob_type == ACPI_TYPE_STRING)
- strncpy(psvt_user[i].limit.string, psvts[i].limit.string,
+ strscpy(psvt_user[i].limit.string, psvts[i].limit.string,
ACPI_LIMIT_STR_MAX_LEN);
else
psvt_user[i].limit.integer = psvts[i].limit.integer;
reply other threads:[~2024-05-14 10:19 UTC|newest]
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