On 8/13/25 3:21 PM, Thorsten Blum wrote: > strcpy() is deprecated; use strscpy() and memcpy() instead. > > In param_set_copystring(), we can safely use memcpy() because we already > know the length of the source string 'val' and that it is guaranteed to > be NUL-terminated within the first 'kps->maxlen' bytes. > > Link: https://github.com/KSPP/linux/issues/88 > Signed-off-by: Thorsten Blum <thorsten.blum@xxxxxxxxx> > --- > Changes in v2: > - Use memcpy() in param_set_copystring() as suggested by Petr Pavlu > - Link to v1: https://lore.kernel.org/lkml/20250810214456.2236-1-thorsten.blum@xxxxxxxxx/ > --- > kernel/params.c | 7 ++++--- > 1 file changed, 4 insertions(+), 3 deletions(-) > > diff --git a/kernel/params.c b/kernel/params.c > index b92d64161b75..b96cfd693c99 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); > + memcpy(kps->string, val, len + 1); > return 0; > } > 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; Reviewed-by: Petr Pavlu <petr.pavlu@xxxxxxxx> -- Thanks, Petr
