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Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: <20261019142516.300040-8-jarkko@kernel.org> References: <20261019142516.300040-8-jarkko@kernel.org> <20261019142516.300040-1-jarkko@kernel.org> To: Jarkko Sakkinen Cc: dhowells@redhat.com, keyrings@vger.kernel.org, Eric Biggers , stable@vger.kernel.org, Paul Moore , James Morris , "Serge E. Hallyn" , linux-security-module@vger.kernel.org (open list:SECURITY SUBSYSTEM), linux-kernel@vger.kernel.org (open list) Subject: Re: [RFC PATCH 7/8] KEYS: Reject @datalen values over INT_MAX X-Mailing-List: linux-security-module@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Date: Mon, 19 Oct 2026 16:43:27 +0100 Message-ID: <2610186.1792424607@warthog.procyon.org.uk> X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 X-Mimecast-MFC-PROC-ID: dH71KbNYFxLUasiTGSib0kL76wxaVNa5OPu_XVkeqao_1792424611 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="us-ascii" Content-ID: <2610185.1792424607.1@warthog.procyon.org.uk> Jarkko Sakkinen wrote: > - int delta = (int)datalen - key->datalen; > + int delta; > int ret = 0; > > key_check(key); > > + if (datalen > INT_MAX) > + return -EINVAL; > + > + delta = (int)datalen - key->datalen; > + You don't actually need to move the subtraction. But apart from that: Signed-off-by: David Howells