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Mon, 18 Jan 2021 23:55:05 -0800 (PST) Received: from gallifrey.ext.pengutronix.de ([2001:67c:670:201:5054:ff:fe8d:eefb] helo=bjornoya.blackshift.org) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1l1lql-0002gq-KV; Tue, 19 Jan 2021 08:54:51 +0100 Received: from [IPv6:2a03:f580:87bc:d400:8975:b8c4:b326:621a] (unknown [IPv6:2a03:f580:87bc:d400:8975:b8c4:b326:621a]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-384) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits)) (Client CN "mkl@blackshift.org", Issuer "StartCom Class 1 Client CA" (not verified)) (Authenticated sender: mkl@blackshift.org) by smtp.blackshift.org (Postfix) with ESMTPSA id 463EC5C7A0E; Tue, 19 Jan 2021 07:54:36 +0000 (UTC) To: angkery , manivannan.sadhasivam@linaro.org, thomas.kopp@microchip.com, wg@grandegger.com, davem@davemloft.net, kuba@kernel.org Cc: linux-can@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Junlin Yang References: <20210119020221.3713-1-angkery@163.com> From: Marc Kleine-Budde Autocrypt: addr=mkl@pengutronix.de; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: <20210119020221.3713-1-angkery@163.com> Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="MFBmdvepDAa83HI4jNqP40G2U9JYAOPNn" X-SA-Exim-Connect-IP: 2001:67c:670:201:5054:ff:fe8d:eefb X-SA-Exim-Mail-From: mkl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --MFBmdvepDAa83HI4jNqP40G2U9JYAOPNn Content-Type: multipart/mixed; boundary="MJd7BafsDwCg03TvaXIhqZgisVeE3DiRZ"; protected-headers="v1" From: Marc Kleine-Budde To: angkery , manivannan.sadhasivam@linaro.org, thomas.kopp@microchip.com, wg@grandegger.com, davem@davemloft.net, kuba@kernel.org Cc: linux-can@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Junlin Yang Message-ID: Subject: Re: [PATCH] can: mcp251xfd: mcp251xfd_handle_ivmif(): fix wrong NULL pointer check References: <20210119020221.3713-1-angkery@163.com> In-Reply-To: <20210119020221.3713-1-angkery@163.com> --MJd7BafsDwCg03TvaXIhqZgisVeE3DiRZ Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 1/19/21 3:02 AM, angkery wrote: > From: Junlin Yang >=20 > if alloc_can_err_skb() returns NULL, we should check skb instead of cf.= Have a look at the function, there is a check for cf several times before= this. But as cf is initialized as NULL this is should be no problem. While in: | ca4c6ebeeb50 can: mcp251xfd: mcp251xfd_handle_rxif_one(): | fix wrong NULL pointer check a real problem has been fixed. Marc --=20 Pengutronix e.K. | Marc Kleine-Budde | Embedded Linux | https://www.pengutronix.de | Vertretung West/Dortmund | Phone: +49-231-2826-924 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | --MJd7BafsDwCg03TvaXIhqZgisVeE3DiRZ-- --MFBmdvepDAa83HI4jNqP40G2U9JYAOPNn Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCgAdFiEEK3kIWJt9yTYMP3ehqclaivrt76kFAmAGkDgACgkQqclaivrt 76k3wwf/T3pirYlaWQKTcWKcDcJuvzEbAg109+zHl0Ltc0vlqd0foNtBv9064t8m 41Ld7wModYPl2kzrs2H6VMWYafX676EbaUiuxdtr78xeM8g+ivFo9TLQH8gT8L9g RoKq3MCx6K09GSRTMzoJqgB7IL9wsgachdGS/MykgH7qZZfQ+mlW77J+KG/eV84Y kJT8QkWYyZhe/1emTdxiUZzTL0tE2zlNZFQzKE4qAXMvTHf1u5ge/T3IfpqYINVw yceHZ/NRq/5P1EkWetHhCX5/INDTpG0Uz4KkAtg7evS0TWnXZOnWxUNpcF3ajQ/X QayRHvX1Zvjg0SvnE9YbEUDJyAZv9g== =0LFJ -----END PGP SIGNATURE----- --MFBmdvepDAa83HI4jNqP40G2U9JYAOPNn--