From: Muchun Song <muchun.song@linux.dev>
To: Thorsten Blum <thorsten.blum@linux.dev>
Cc: Oscar Salvador <osalvador@suse.de>,
David Hildenbrand <david@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Frank van der Linden <fvdl@google.com>,
stable@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm/hugetlb: fix early boot crash on parameters without '=' separator
Date: Thu, 9 Apr 2026 19:03:41 +0800 [thread overview]
Message-ID: <518E33D5-81E7-4119-8168-6E31ED743930@linux.dev> (raw)
In-Reply-To: <20260409105437.108686-4-thorsten.blum@linux.dev>
> On Apr 9, 2026, at 18:54, Thorsten Blum <thorsten.blum@linux.dev> wrote:
>
> If hugepages, hugepagesz, or default_hugepagesz are specified on the
> kernel command line without the '=' separator, early parameter parsing
> passes NULL to hugetlb_add_param(), which dereferences it in strlen()
> and can crash the system during early boot.
>
> Reject NULL values in hugetlb_add_param() and return -EINVAL instead.
>
> Fixes: 5b47c02967ab ("mm/hugetlb: convert cmdline parameters from setup to early")
> Cc: stable@vger.kernel.org
> Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Reviewed-by: Muchun Song <muchun.song@linux.dev>
Thanks.
prev parent reply other threads:[~2026-04-09 11:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-09 10:54 Thorsten Blum
2026-04-09 11:03 ` Muchun Song [this message]
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