linux-kernel - Re: [PATCH] mm/cma: Replace snprintf with strscpy in cma_new

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Message-Id: <20260126165450.f83b1895deeda8e4332a57d3@linux-foundation.org>
Date: Mon, 26 Jan 2026 16:54:50 -0800
From: Andrew Morton <akpm@...ux-foundation.org>
To: SeongJae Park <sj@...nel.org>
Cc: Thorsten Blum <thorsten.blum@...ux.dev>, David Hildenbrand
 <david@...nel.org>, Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
 "Liam R. Howlett" <Liam.Howlett@...cle.com>, Vlastimil Babka
 <vbabka@...e.cz>, Mike Rapoport <rppt@...nel.org>, Suren Baghdasaryan
 <surenb@...gle.com>, Michal Hocko <mhocko@...e.com>, linux-mm@...ck.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/cma: Replace snprintf with strscpy in cma_new_area

On Mon, 26 Jan 2026 16:47:22 -0800 SeongJae Park <sj@...nel.org> wrote:

> > @@ -233,7 +234,7 @@ static int __init cma_new_area(const char *name, phys_addr_t size,
> >  	cma_area_count++;
> >  
> >  	if (name)
> > -		snprintf(cma->name, CMA_MAX_NAME, "%s", name);
> > +		strscpy(cma->name, name);
> 
> Any reason to drop CMA_MAX_NAME protection?  You can pass the size of
> destination buffer as the third argument of strscpy().

strscpy() will now use sizeof(cma->name):

	char name[CMA_MAX_NAME];