On 8/10/25 11:44 PM, Thorsten Blum wrote:
> strcpy() is deprecated; use strscpy() instead.
>
> Link: https://github.com/KSPP/linux/issues/88
> Signed-off-by: Thorsten Blum <[email protected]>
> ---
> kernel/params.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/kernel/params.c b/kernel/params.c
> index b92d64161b75..88765f2d5d56 100644
> --- a/kernel/params.c
> +++ b/kernel/params.c
> @@ -513,13 +513,14 @@ EXPORT_SYMBOL(param_array_ops);
> int param_set_copystring(const char *val, const struct kernel_param *kp)
> {
> const struct kparam_string *kps = kp->str;
> + const size_t len = strnlen(val, kps->maxlen);
>
> - if (strnlen(val, kps->maxlen) == kps->maxlen) {
> + if (len == kps->maxlen) {
> pr_err("%s: string doesn't fit in %u chars.\n",
> kp->name, kps->maxlen-1);
> return -ENOSPC;
> }
> - strcpy(kps->string, val);
> + strscpy(kps->string, val, len + 1);
> return 0;
> }
Since the code already calculated the length of val and that it fits
into kps->string, is there any advantage (or disadvantage) to using
strscpy() over memcpy()?
> EXPORT_SYMBOL(param_set_copystring);
> @@ -841,7 +842,7 @@ static void __init param_sysfs_builtin(void)
> dot = strchr(kp->name, '.');
> if (!dot) {
> /* This happens for core_param() */
> - strcpy(modname, "kernel");
> + strscpy(modname, "kernel");
> name_len = 0;
> } else {
> name_len = dot - kp->name + 1;
I think this can go through the modules tree. I've CC'd the mailing
list.
--
Thanks,
Petr
