From: Danilo Krummrich <dakr@kernel.org>
To: Kees Cook <kees@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Erhard Furtner <erhard_f@mailbox.org>,
Michal Hocko <mhocko@suse.com>, Vlastimil Babka <vbabka@suse.cz>,
Uladzislau Rezki <urezki@gmail.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
linux-hardening@vger.kernel.org
Subject: Re: [PATCH v2] mm: vmalloc: Support more granular vrealloc() sizing
Date: Sat, 26 Apr 2025 12:17:28 +0200 [thread overview]
Message-ID: <aAyyuCz6Y1bliBbn@pollux> (raw)
In-Reply-To: <20250426001105.it.679-kees@kernel.org>
On Fri, Apr 25, 2025 at 05:11:07PM -0700, Kees Cook wrote:
> Introduce struct vm_struct::requested_size so that the requested
> (re)allocation size is retained separately from the allocated area
> size. This means that KASAN will correctly poison the correct spans
> of requested bytes. This also means we can support growing the usable
> portion of an allocation that can already be supported by the existing
> area's existing allocation.
>
> Reported-by: Erhard Furtner <erhard_f@mailbox.org>
> Closes: https://lore.kernel.org/all/20250408192503.6149a816@outsider.home/
> Fixes: 3ddc2fefe6f3 ("mm: vmalloc: implement vrealloc()")
> Signed-off-by: Kees Cook <kees@kernel.org>
Reviewed-by: Danilo Krummrich <dakr@kernel.org>
prev parent reply other threads:[~2025-04-26 10:17 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-26 0:11 [PATCH v2] mm: vmalloc: Support more granular vrealloc() sizing Kees Cook
2025-04-26 10:17 ` Danilo Krummrich [this message]
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