[PATCH] bpftool: Replace strncpy with strscpy

From: Michael Estner
Date: Fri Feb 28 2025 - 13:24:51 EST


strncpy() is deprecated for NUL-terminated destination buffers. Use
strscpy() instead and remove the manual NUL-termination.

Compile-tested only.

Link: https://github.com/KSPP/linux/issues/90

Signed-off-by: Michael Estner <michaelestner@xxxxxx>
---
tools/bpf/bpftool/xlated_dumper.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/tools/bpf/bpftool/xlated_dumper.c b/tools/bpf/bpftool/xlated_dumper.c
index d0094345fb2b..60dbe48a91a3 100644
--- a/tools/bpf/bpftool/xlated_dumper.c
+++ b/tools/bpf/bpftool/xlated_dumper.c
@@ -135,8 +135,7 @@ print_insn_json(void *private_data, const char *fmt, ...)

va_start(args, fmt);
if (l > 0) {
- strncpy(chomped_fmt, fmt, l - 1);
- chomped_fmt[l - 1] = '\0';
+ strscpy(chomped_fmt, fmt);
}
jsonw_vprintf_enquote(json_wtr, chomped_fmt, args);
va_end(args);
--
2.25.1