From: Simon Horman <horms@kernel.org>
To: Paul Moses <p@1g4.org>
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,
chopps@labn.net, linux-kernel@vger.kernel.org,
stable@vger.kernel.org
Subject: Re: [PATCH net v2] xfrm: iptfs: only publish mode_data after clone setup
Date: Fri, 13 Mar 2026 14:26:07 +0000 [thread overview]
Message-ID: <20260313142607.GC461701@kernel.org> (raw)
In-Reply-To: <20260312113843.2883169-1-p@1g4.org>
On Thu, Mar 12, 2026 at 11:39:09AM +0000, Paul Moses wrote:
> iptfs_clone_state() stores x->mode_data before allocating the reorder
> window. If that allocation fails, the code frees the cloned state and
> returns -ENOMEM, leaving x->mode_data pointing at freed memory.
>
> The xfrm clone unwind later runs destroy_state() through x->mode_data,
> so the failed clone path tears down IPTFS state that clone_state()
> already freed.
>
> Keep the cloned IPTFS state private until all allocations succeed so
> failed clones leave x->mode_data unset. The destroy path already
> handles a NULL mode_data pointer.
>
> Fixes: 6be02e3e4f37 ("xfrm: iptfs: handle reordering of received packets")
> Cc: stable@vger.kernel.org
> Signed-off-by: Paul Moses <p@1g4.org>
> ---
> Changes in v2:
> - Fix Fixes tag to point to 6be02e3e4f37
Thanks for the update.
Reviewed-by: Simon Horman <horms@kernel.org>
prev parent reply other threads:[~2026-03-13 14:26 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-12 11:39 [PATCH net v2] xfrm: iptfs: only publish mode_data after clone setup Paul Moses
2026-03-13 11:34 ` Steffen Klassert
2026-03-13 14:26 ` Simon Horman [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=20260313142607.GC461701@kernel.org \
--to=horms@kernel.org \
--cc=chopps@labn.net \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=herbert@gondor.apana.org.au \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=p@1g4.org \
--cc=pabeni@redhat.com \
--cc=stable@vger.kernel.org \
--cc=steffen.klassert@secunet.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