From: Breno Leitao <leitao@debian.org>
To: Yasuaki Torimaru <yasuakitorimaru@gmail.com>
Cc: netdev@vger.kernel.org, steffen.klassert@secunet.com,
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: Fri, 27 Mar 2026 09:46:39 -0700 [thread overview]
Message-ID: <aca0YEL_PC3GFySl@gmail.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>
Reviewed-by: Breno Leitao <leitao@debian.org>
prev parent reply other threads:[~2026-03-27 16:46 UTC|newest]
Thread overview: 3+ 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 [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=aca0YEL_PC3GFySl@gmail.com \
--to=leitao@debian.org \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=herbert@gondor.apana.org.au \
--cc=horms@kernel.org \
--cc=kuba@kernel.org \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=stable@vger.kernel.org \
--cc=steffen.klassert@secunet.com \
--cc=yasuakitorimaru@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox