netdev - Re: [PATCH] net/sctp: fix a null dereference in sctp_disposition sctp_sf_do_5_1D

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Message-ID: <a6e99e68-3964-40f4-8512-44f16bd058ee@web.de>
Date: Fri, 3 Oct 2025 17:36:20 +0200
From: Markus Elfring <Markus.Elfring@....de>
To: Xin Long <lucien.xin@...il.com>, Alexandr Sapozhnikov
 <alsp705@...il.com>, linux-sctp@...r.kernel.org, netdev@...r.kernel.org,
 lvc-project@...uxtesting.org
Cc: LKML <linux-kernel@...r.kernel.org>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>,
 Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
 Paolo Abeni <pabeni@...hat.com>
Subject: Re: [PATCH] net/sctp: fix a null dereference in sctp_disposition
 sctp_sf_do_5_1D_ce()

…
> > and sctp_ulpevent_make_authkey() returns 0, then the variable
> > ai_ev remains zero and the zero will be dereferenced
> > in the sctp_ulpevent_free() function.
…
> Fixes: 30f6ebf65bc4 ("sctp: add SCTP_AUTH_NO_AUTH type for
> AUTHENTICATION_EVENT")
…

See also:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.17#n145

Regards,
Markus