[PATCH bpf-next] bpf: Replace snprintf("%s", ...) with strscpy()

From: Thorsten Blum

Date: Sun Feb 01 2026 - 13:06:19 EST


Replace snprintf("%s", ...) with the faster and more direct strscpy().

Signed-off-by: Thorsten Blum <thorsten.blum@xxxxxxxxx>
---
kernel/bpf/btf.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
index 8959f3bc1e92..72fa0cb1a71b 100644
--- a/kernel/bpf/btf.c
+++ b/kernel/bpf/btf.c
@@ -25,6 +25,7 @@
#include <linux/perf_event.h>
#include <linux/bsearch.h>
#include <linux/kobject.h>
+#include <linux/string.h>
#include <linux/sysfs.h>
#include <linux/overflow.h>

@@ -1210,8 +1211,7 @@ static const char *btf_show_name(struct btf_show *show)

/* Even if we don't want type name info, we want parentheses etc */
if (show->flags & BTF_SHOW_NONAME)
- snprintf(show->state.name, sizeof(show->state.name), "%s",
- parens);
+ strscpy(show->state.name, parens);
else
snprintf(show->state.name, sizeof(show->state.name),
"%s%s%s(%s%s%s%s%s%s)%s",
@@ -6324,7 +6324,7 @@ static struct btf *btf_parse_base(struct btf_verifier_env *env, const char *name
btf->data_size = data_size;
btf->kernel_btf = true;
btf->named_start_id = 0;
- snprintf(btf->name, sizeof(btf->name), "%s", name);
+ strscpy(btf->name, name);

err = btf_parse_hdr(env);
if (err)
@@ -6443,7 +6443,7 @@ static struct btf *btf_parse_module(const char *module_name, const void *data,
btf->start_str_off = base_btf->hdr.str_len;
btf->kernel_btf = true;
btf->named_start_id = 0;
- snprintf(btf->name, sizeof(btf->name), "%s", module_name);
+ strscpy(btf->name, module_name);

btf->data = kvmemdup(data, data_size, GFP_KERNEL | __GFP_NOWARN);
if (!btf->data) {
--
Thorsten Blum <thorsten.blum@xxxxxxxxx>
GPG: 1D60 735E 8AEF 3BE4 73B6 9D84 7336 78FD 8DFE EAD4