[PATCH linux-next] parisc: use strscpy() to instead of strncpy()

yang.yang29
2022-12-23T02:41:04Z

From: Xu Panda <xu.panda@zte.com.cn>

The implementation of strscpy() is more robust and safer.
That's now the recommended way to copy NUL-terminated strings.

Signed-off-by: Xu Panda <xu.panda@zte.com.cn>
Signed-off-by: Yang Yang <yang.yang29@zte.com>
---
drivers/parisc/pdc_stable.c | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/parisc/pdc_stable.c b/drivers/parisc/pdc_stable.c
index d6af5726ddf3..403bca0021c5 100644
--- a/drivers/parisc/pdc_stable.c
+++ b/drivers/parisc/pdc_stable.c
@@ -274,8 +274,7 @@ pdcspath_hwpath_write(struct pdcspath_entry *entry, const char *buf, size_t coun

/* We'll use a local copy of buf */
count = min_t(size_t, count, sizeof(in)-1);
- strncpy(in, buf, count);
- in[count] = '\0';
+ strscpy(in, buf, count + 1);

/* Let's clean up the target. 0xff is a blank pattern */
memset(&hwpath, 0xff, sizeof(hwpath));
@@ -388,8 +387,7 @@ pdcspath_layer_write(struct pdcspath_entry *entry, const char *buf, size_t count

/* We'll use a local copy of buf */
count = min_t(size_t, count, sizeof(in)-1);
- strncpy(in, buf, count);
- in[count] = '\0';
+ strscpy(in, buf, count + 1);

/* Let's clean up the target. 0 is a blank pattern */
memset(&layers, 0, sizeof(layers));
@@ -756,8 +754,7 @@ static ssize_t pdcs_auto_write(struct kobject *kobj,

/* We'll use a local copy of buf */
count = min_t(size_t, count, sizeof(in)-1);
- strncpy(in, buf, count);
- in[count] = '\0';
+ strscpy(in, buf, count + 1);

/* Current flags are stored in primary boot path entry */
pathentry = &pdcspath_entry_primary;
--
2.15.2