[PATCH bpf-next] bpf: Replace strncpy() with strscpy_pad()

[Yuntao Wang]

Using strncpy() on NUL-terminated strings is considered deprecated[1],
replace it with strscpy_pad().

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings

Signed-off-by: Yuntao Wang <ytcoode@xxxxxxxxx>
---
 kernel/bpf/helpers.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c
index ae64110a98b5..d03b28761a67 100644
--- a/kernel/bpf/helpers.c
+++ b/kernel/bpf/helpers.c
@@ -225,13 +225,7 @@ BPF_CALL_2(bpf_get_current_comm, char *, buf, u32, size)
 	if (unlikely(!task))
 		goto err_clear;
 
-	strncpy(buf, task->comm, size);
-
-	/* Verifier guarantees that size > 0. For task->comm exceeding
-	 * size, guarantee that buf is %NUL-terminated. Unconditionally
-	 * done here to save the size test.
-	 */
-	buf[size - 1] = 0;
+	strscpy_pad(buf, task->comm, size);
 	return 0;
 err_clear:
 	memset(buf, 0, size);
-- 
2.35.1