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Thu, 3 Feb 2022 00:05:21 +0000 Received: by kubenode514.mail-prod1.omega.bf1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID cfd0a79a651ddfd5d30c37da48c43da1; Thu, 03 Feb 2022 00:05:20 +0000 (UTC) From: Casey Schaufler To: casey.schaufler@intel.com, jmorris@namei.org, linux-security-module@vger.kernel.org, selinux@vger.kernel.org Cc: casey@schaufler-ca.com, linux-audit@redhat.com, keescook@chromium.org, john.johansen@canonical.com, penguin-kernel@i-love.sakura.ne.jp, paul@paul-moore.com, sds@tycho.nsa.gov, linux-kernel@vger.kernel.org, Stephen Smalley Subject: [PATCH v32 10/28] LSM: Use lsmblob in security_ipc_getsecid Date: Wed, 2 Feb 2022 15:53:05 -0800 Message-Id: <20220202235323.23929-11-casey@schaufler-ca.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220202235323.23929-1-casey@schaufler-ca.com> References: <20220202235323.23929-1-casey@schaufler-ca.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org There may be more than one LSM that provides IPC data for auditing. Change security_ipc_getsecid() to fill in a lsmblob structure instead of the u32 secid. The audit data structure containing the secid will be updated later, so there is a bit of scaffolding here. Reviewed-by: Kees Cook Reviewed-by: John Johansen Acked-by: Stephen Smalley Acked-by: Paul Moore Signed-off-by: Casey Schaufler Cc: linux-audit@redhat.com --- include/linux/security.h | 7 ++++--- kernel/auditsc.c | 7 ++++++- security/security.c | 12 +++++++++--- 3 files changed, 19 insertions(+), 7 deletions(-) diff --git a/include/linux/security.h b/include/linux/security.h index 44843d665f35..62178dd4ec08 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -519,7 +519,7 @@ int security_task_prctl(int option, unsigned long arg2, unsigned long arg3, unsigned long arg4, unsigned long arg5); void security_task_to_inode(struct task_struct *p, struct inode *inode); int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag); -void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid); +void security_ipc_getsecid(struct kern_ipc_perm *ipcp, struct lsmblob *blob); int security_msg_msg_alloc(struct msg_msg *msg); void security_msg_msg_free(struct msg_msg *msg); int security_msg_queue_alloc(struct kern_ipc_perm *msq); @@ -1276,9 +1276,10 @@ static inline int security_ipc_permission(struct kern_ipc_perm *ipcp, return 0; } -static inline void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid) +static inline void security_ipc_getsecid(struct kern_ipc_perm *ipcp, + struct lsmblob *blob) { - *secid = 0; + lsmblob_init(blob, 0); } static inline int security_msg_msg_alloc(struct msg_msg *msg) diff --git a/kernel/auditsc.c b/kernel/auditsc.c index 5edb16cb12e0..598e0de45b04 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -2610,12 +2610,17 @@ void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat) void __audit_ipc_obj(struct kern_ipc_perm *ipcp) { struct audit_context *context = audit_context(); + struct lsmblob blob; context->ipc.uid = ipcp->uid; context->ipc.gid = ipcp->gid; context->ipc.mode = ipcp->mode; context->ipc.has_perm = 0; - security_ipc_getsecid(ipcp, &context->ipc.osid); + security_ipc_getsecid(ipcp, &blob); + /* context->ipc.osid will be changed to a lsmblob later in + * the patch series. This will allow auditing of all the object + * labels associated with the ipc object. */ + context->ipc.osid = lsmblob_value(&blob); context->type = AUDIT_IPC; } diff --git a/security/security.c b/security/security.c index ffdd366d2098..815200684bcf 100644 --- a/security/security.c +++ b/security/security.c @@ -1999,10 +1999,16 @@ int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag) return call_int_hook(ipc_permission, 0, ipcp, flag); } -void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid) +void security_ipc_getsecid(struct kern_ipc_perm *ipcp, struct lsmblob *blob) { - *secid = 0; - call_void_hook(ipc_getsecid, ipcp, secid); + struct security_hook_list *hp; + + lsmblob_init(blob, 0); + hlist_for_each_entry(hp, &security_hook_heads.ipc_getsecid, list) { + if (WARN_ON(hp->lsmid->slot < 0 || hp->lsmid->slot >= lsm_slot)) + continue; + hp->hook.ipc_getsecid(ipcp, &blob->secid[hp->lsmid->slot]); + } } int security_msg_msg_alloc(struct msg_msg *msg) -- 2.31.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6B9E6C433EF for ; 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Thu, 3 Feb 2022 00:05:21 +0000 Received: by kubenode514.mail-prod1.omega.bf1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID cfd0a79a651ddfd5d30c37da48c43da1; Thu, 03 Feb 2022 00:05:20 +0000 (UTC) From: Casey Schaufler To: casey.schaufler@intel.com, jmorris@namei.org, linux-security-module@vger.kernel.org, selinux@vger.kernel.org Subject: [PATCH v32 10/28] LSM: Use lsmblob in security_ipc_getsecid Date: Wed, 2 Feb 2022 15:53:05 -0800 Message-Id: <20220202235323.23929-11-casey@schaufler-ca.com> In-Reply-To: <20220202235323.23929-1-casey@schaufler-ca.com> References: <20220202235323.23929-1-casey@schaufler-ca.com> MIME-Version: 1.0 X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.85 on 10.11.54.9 X-loop: linux-audit@redhat.com Cc: john.johansen@canonical.com, linux-kernel@vger.kernel.org, linux-audit@redhat.com, sds@tycho.nsa.gov X-BeenThere: linux-audit@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: Linux Audit Discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-audit-bounces@redhat.com Errors-To: linux-audit-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=linux-audit-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit There may be more than one LSM that provides IPC data for auditing. Change security_ipc_getsecid() to fill in a lsmblob structure instead of the u32 secid. The audit data structure containing the secid will be updated later, so there is a bit of scaffolding here. Reviewed-by: Kees Cook Reviewed-by: John Johansen Acked-by: Stephen Smalley Acked-by: Paul Moore Signed-off-by: Casey Schaufler Cc: linux-audit@redhat.com --- include/linux/security.h | 7 ++++--- kernel/auditsc.c | 7 ++++++- security/security.c | 12 +++++++++--- 3 files changed, 19 insertions(+), 7 deletions(-) diff --git a/include/linux/security.h b/include/linux/security.h index 44843d665f35..62178dd4ec08 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -519,7 +519,7 @@ int security_task_prctl(int option, unsigned long arg2, unsigned long arg3, unsigned long arg4, unsigned long arg5); void security_task_to_inode(struct task_struct *p, struct inode *inode); int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag); -void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid); +void security_ipc_getsecid(struct kern_ipc_perm *ipcp, struct lsmblob *blob); int security_msg_msg_alloc(struct msg_msg *msg); void security_msg_msg_free(struct msg_msg *msg); int security_msg_queue_alloc(struct kern_ipc_perm *msq); @@ -1276,9 +1276,10 @@ static inline int security_ipc_permission(struct kern_ipc_perm *ipcp, return 0; } -static inline void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid) +static inline void security_ipc_getsecid(struct kern_ipc_perm *ipcp, + struct lsmblob *blob) { - *secid = 0; + lsmblob_init(blob, 0); } static inline int security_msg_msg_alloc(struct msg_msg *msg) diff --git a/kernel/auditsc.c b/kernel/auditsc.c index 5edb16cb12e0..598e0de45b04 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -2610,12 +2610,17 @@ void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat) void __audit_ipc_obj(struct kern_ipc_perm *ipcp) { struct audit_context *context = audit_context(); + struct lsmblob blob; context->ipc.uid = ipcp->uid; context->ipc.gid = ipcp->gid; context->ipc.mode = ipcp->mode; context->ipc.has_perm = 0; - security_ipc_getsecid(ipcp, &context->ipc.osid); + security_ipc_getsecid(ipcp, &blob); + /* context->ipc.osid will be changed to a lsmblob later in + * the patch series. This will allow auditing of all the object + * labels associated with the ipc object. */ + context->ipc.osid = lsmblob_value(&blob); context->type = AUDIT_IPC; } diff --git a/security/security.c b/security/security.c index ffdd366d2098..815200684bcf 100644 --- a/security/security.c +++ b/security/security.c @@ -1999,10 +1999,16 @@ int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag) return call_int_hook(ipc_permission, 0, ipcp, flag); } -void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid) +void security_ipc_getsecid(struct kern_ipc_perm *ipcp, struct lsmblob *blob) { - *secid = 0; - call_void_hook(ipc_getsecid, ipcp, secid); + struct security_hook_list *hp; + + lsmblob_init(blob, 0); + hlist_for_each_entry(hp, &security_hook_heads.ipc_getsecid, list) { + if (WARN_ON(hp->lsmid->slot < 0 || hp->lsmid->slot >= lsm_slot)) + continue; + hp->hook.ipc_getsecid(ipcp, &blob->secid[hp->lsmid->slot]); + } } int security_msg_msg_alloc(struct msg_msg *msg) -- 2.31.1 -- Linux-audit mailing list Linux-audit@redhat.com https://listman.redhat.com/mailman/listinfo/linux-audit