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Fri, 22 Jul 2022 06:22:07 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id EvwjFA9C2mJ1FAAAMHmgww (envelope-from ); Fri, 22 Jul 2022 06:22:07 +0000 Message-ID: <10c59d89-2bbd-ae7c-d1cf-97d5c58c7330@suse.de> Date: Fri, 22 Jul 2022 08:22:07 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: Re: [PATCH 1/2] nvme-auth: Fix off by one checks Content-Language: en-US To: Dan Carpenter Cc: linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org, linux-nvme@lists.infradead.org References: From: Hannes Reinecke In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220721_232212_206487_FF8F5C8F X-CRM114-Status: GOOD ( 16.57 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On 7/18/22 13:09, Dan Carpenter wrote: > The > ARRAY_SIZE() checks need to be >= ARRAY_SIZE() to prevent reading > one element beyond the end of the arrays. > > Fixes: a476416bb57b ("nvme: implement In-Band authentication") > Signed-off-by: Dan Carpenter > --- > The MAINTAINERS file needs to be updated for this new code. > > drivers/nvme/common/auth.c | 10 +++++----- > 1 file changed, 5 insertions(+), 5 deletions(-) > > diff --git a/drivers/nvme/common/auth.c b/drivers/nvme/common/auth.c > index 0c86ebce59d2..bfb16fec0aed 100644 > --- a/drivers/nvme/common/auth.c > +++ b/drivers/nvme/common/auth.c > @@ -55,7 +55,7 @@ static struct nvme_auth_dhgroup_map { > > const char *nvme_auth_dhgroup_name(u8 dhgroup_id) > { > - if ((dhgroup_id > ARRAY_SIZE(dhgroup_map)) || > + if ((dhgroup_id >= ARRAY_SIZE(dhgroup_map)) || > !dhgroup_map[dhgroup_id].name || > !strlen(dhgroup_map[dhgroup_id].name)) > return NULL; > @@ -65,7 +65,7 @@ EXPORT_SYMBOL_GPL(nvme_auth_dhgroup_name); > > const char *nvme_auth_dhgroup_kpp(u8 dhgroup_id) > { > - if ((dhgroup_id > ARRAY_SIZE(dhgroup_map)) || > + if ((dhgroup_id >= ARRAY_SIZE(dhgroup_map)) || > !dhgroup_map[dhgroup_id].kpp || > !strlen(dhgroup_map[dhgroup_id].kpp)) > return NULL; > @@ -113,7 +113,7 @@ static struct nvme_dhchap_hash_map { > > const char *nvme_auth_hmac_name(u8 hmac_id) > { > - if ((hmac_id > ARRAY_SIZE(hash_map)) || > + if ((hmac_id >= ARRAY_SIZE(hash_map)) || > !hash_map[hmac_id].hmac || > !strlen(hash_map[hmac_id].hmac)) > return NULL; > @@ -123,7 +123,7 @@ EXPORT_SYMBOL_GPL(nvme_auth_hmac_name); > > const char *nvme_auth_digest_name(u8 hmac_id) > { > - if ((hmac_id > ARRAY_SIZE(hash_map)) || > + if ((hmac_id >= ARRAY_SIZE(hash_map)) || > !hash_map[hmac_id].digest || > !strlen(hash_map[hmac_id].digest)) > return NULL; > @@ -148,7 +148,7 @@ EXPORT_SYMBOL_GPL(nvme_auth_hmac_id); > > size_t nvme_auth_hmac_hash_len(u8 hmac_id) > { > - if ((hmac_id > ARRAY_SIZE(hash_map)) || > + if ((hmac_id >= ARRAY_SIZE(hash_map)) || > !hash_map[hmac_id].hmac || > !strlen(hash_map[hmac_id].hmac)) > return 0; Reviewed-by: Hannes Reinecke Cheers, Hannes -- Dr. Hannes Reinecke Kernel Storage Architect hare@suse.de +49 911 74053 688 SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg HRB 36809 (AG Nürnberg), Geschäftsführer: Ivo Totev, Andrew Myers, Andrew McDonald, Martje Boudien Moerman