From: HACKE-RC <rc@rexion.ai>
To: Pablo Neira Ayuso <pablo@netfilter.org>, Florian Westphal <fw@strlen.de>
Cc: Phil Sutter <phil@nwl.cc>,
"David S . Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Simon Horman <horms@kernel.org>,
netfilter-devel@vger.kernel.org, coreteam@netfilter.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
HACKE-RC <rc@rexion.ai>
Subject: [PATCH net-next 0/2] netfilter: conntrack: validate parsed port values in IRC and Amanda helpers
Date: Thu, 30 Apr 2026 21:42:28 +0530 [thread overview]
Message-ID: <20260430161230.3438973-1-rc@rexion.ai> (raw)
Both nf_conntrack_irc and nf_conntrack_amanda parse port numbers from
application-layer protocol data using simple_strtoul(), which returns
unsigned long. The results are stored in u16 variables without range
checks, silently truncating values above 65535.
This series adds explicit upper-bound validation in both helpers.
Note: checkpatch warns about simple_strtoul being obsolete. Both
call sites use the endptr output parameter to advance the parse
position, which kstrtoul does not provide. Converting to kstrtoul
would require restructuring the parsers, which is out of scope for
this fix.
HACKE-RC (2):
netfilter: nf_conntrack_irc: reject DCC port values above 65535
netfilter: nf_conntrack_amanda: reject port values above 65535
net/netfilter/nf_conntrack_amanda.c | 10 ++++++----
net/netfilter/nf_conntrack_irc.c | 7 ++++++-
2 files changed, 12 insertions(+), 5 deletions(-)
--
2.54.0
next reply other threads:[~2026-04-30 16:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-30 16:12 HACKE-RC [this message]
2026-04-30 16:12 ` [PATCH net-next 1/2] netfilter: nf_conntrack_irc: reject DCC port values above 65535 HACKE-RC
2026-04-30 16:18 ` [PATCH net-next 0/2] netfilter: conntrack: validate parsed port values in IRC and Amanda helpers Pablo Neira Ayuso
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=20260430161230.3438973-1-rc@rexion.ai \
--to=rc@rexion.ai \
--cc=coreteam@netfilter.org \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=fw@strlen.de \
--cc=horms@kernel.org \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=netfilter-devel@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=pablo@netfilter.org \
--cc=phil@nwl.cc \
/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