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From: Steffen Klassert <steffen.klassert@secunet.com>
To: Yasuaki Torimaru <yasuakitorimaru@gmail.com>
Cc: <netdev@vger.kernel.org>, <herbert@gondor.apana.org.au>,
	<davem@davemloft.net>, <edumazet@google.com>, <kuba@kernel.org>,
	<pabeni@redhat.com>, <horms@kernel.org>, <stable@vger.kernel.org>
Subject: Re: [PATCH net v3] xfrm: clear trailing padding in build_polexpire()
Date: Tue, 31 Mar 2026 09:47:35 +0200	[thread overview]
Message-ID: <act8F0uSYWmI7fAN@secunet.com> (raw)
In-Reply-To: <20260326055801.897013-1-yasuakitorimaru@gmail.com>

On Thu, Mar 26, 2026 at 02:58:00PM +0900, Yasuaki Torimaru wrote:
> build_expire() clears the trailing padding bytes of struct
> xfrm_user_expire after setting the hard field via memset_after(),
> but the analogous function build_polexpire() does not do this for
> struct xfrm_user_polexpire.
> 
> The padding bytes after the __u8 hard field are left
> uninitialized from the heap allocation, and are then sent to
> userspace via netlink multicast to XFRMNLGRP_EXPIRE listeners,
> leaking kernel heap memory contents.
> 
> Add the missing memset_after() call, matching build_expire().
> 
> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> Cc: stable@vger.kernel.org
> Signed-off-by: Yasuaki Torimaru <yasuakitorimaru@gmail.com>

Applied to the ipsec tree, thanks Yasuaki!

      parent reply	other threads:[~2026-03-31  7:47 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-03-26  5:58 [PATCH net v3] xfrm: clear trailing padding in build_polexpire() Yasuaki Torimaru
2026-03-27 13:38 ` Simon Horman
2026-03-27 16:46 ` Breno Leitao
2026-03-31  7:47 ` Steffen Klassert [this message]

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