From patchwork Fri May 11 00:55:16 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Casey Schaufler X-Patchwork-Id: 10392823 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 991DB60153 for ; Fri, 11 May 2018 00:57:26 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7ED9D28D42 for ; Fri, 11 May 2018 00:57:26 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 73B2828D4F; Fri, 11 May 2018 00:57:26 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4C46028D42 for ; Fri, 11 May 2018 00:57:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752106AbeEKAzX (ORCPT ); Thu, 10 May 2018 20:55:23 -0400 Received: from sonic311-29.consmr.mail.ne1.yahoo.com ([66.163.188.210]:43515 "EHLO sonic311-29.consmr.mail.ne1.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752033AbeEKAzV (ORCPT ); Thu, 10 May 2018 20:55:21 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1526000120; bh=f5X9Ud1hlwj9IEWFyzjxuqKpIJG3OCOK1Ict0QPyJ4s=; h=Subject:To:References:From:Date:In-Reply-To:From:Subject; b=k4+rJoJQTU4Dcnh4SFQZPj1d36f+qHsKmpz8HKhCABb111aPBfeQys5ooRpcH3AG4qCQpqq1rY7ffaTza3mZQmjom1Fbr0osUut5RkzSNQNC+wb38DByRASzzxxFuK37jvcqvITCy0t6IkHUpglaBDLMTFgx45v8quYE0gyv40kFs2jJysMBkkaZEfghc2xM37/7QQl65Debnk/a4W+eAtVIgww5M+WfBmdV40W7zUevCC8uWKI1VSGNPFnSG6Qkad+3IV/Pr6PJj5xK2gGCjAsVRrsJVsvS0/DI6OhNjgV8y78D5Cz7Wa0sBCtKGNrfG5893jCuiq6duBP5qcgWlw== X-YMail-OSG: qv9wc3oVM1mk5mYshALrvyAE5aEbCdDGTG5RkB_4JT0ga1uzTZOlB2.uo_34Bzh BzsD2PDBRZnw3SSWJNfkkfUfSufrhKg9AeXand2sg6WTgD14q_04fce37VLOMnXS3MxEMHdUvqRn 8IpI9sWzWrtHrgnL_j0SdSxqCHPAVtgzJM2Uy9BejgRuuYA5woUVV1mC_.kzXwoGxf9yRUxeQypw prgwav5afsLGJP9emRSkfYxl3ZuITRyXPSFHBrC0w.KsIbF8DGq0jrr8AK0vuCsVPDacAwVHDcaZ R6fU965zjb5McBtTeSn_rUZk47PNQFSIIykVcYKuUYYTJaYY6pRSb7UvM38cjaOoHLDigHbxX8k_ etH39D8vnHJpJNR4C1NULZfNDZ9N6bkcWepOvSA3GSr5bZ_OOMwTe.z8OIa_BseaVHflbnMTd59u rkrRPXuZ3bV6yQDIFOmkx0y7KiCfrnvae5VEMAHmTzkcGRdxlUv22CaU5AoGLuRWEBOXmXcF_FvH axbnQAXUQpNfpQygfPj68KmbvbRN2zG.eNUV3dl22XymomF722Afc1ioN7qJOjRoMEtiD_8pEpce x_zjazHjGZv5Dm5tHRLkaMGD.6eF2cRm2wO4zMb2fMS3ZcAWR_7Hxl24_x1rDa4si5uIPtBYR4Xf iMDE- Received: from sonic.gate.mail.ne1.yahoo.com by sonic311.consmr.mail.ne1.yahoo.com with HTTP; Fri, 11 May 2018 00:55:20 +0000 Received: from c-67-169-65-224.hsd1.ca.comcast.net (EHLO [192.168.0.105]) ([67.169.65.224]) by smtp429.mail.ne1.yahoo.com (Oath Hermes SMTP Server) with ESMTPA ID 207f69df107cacd0c21beb3934ce63ef; Fri, 11 May 2018 00:55:19 +0000 (UTC) Subject: [PATCH 16/23] LSM: Sharing of security blobs To: LSM , LKLM , Paul Moore , Stephen Smalley , SE Linux , "SMACK-discuss@lists.01.org" , John Johansen , Kees Cook , Tetsuo Handa , James Morris References: <7e8702ce-2598-e0a3-31a2-bc29157fb73d@schaufler-ca.com> From: Casey Schaufler Message-ID: <13c7db15-9c40-ac5e-542c-b200641dd6ad@schaufler-ca.com> Date: Thu, 10 May 2018 17:55:16 -0700 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <7e8702ce-2598-e0a3-31a2-bc29157fb73d@schaufler-ca.com> Content-Language: en-US Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP From: Casey Schaufler Date: Thu, 10 May 2018 14:57:25 -0700 Subject: [PATCH 16/23] LSM: Sharing of security blobs Augment the security modules that use security blobs ("Major" security modules) to allow sharing of the infrastructure allocated blobs. When CONFIG_SECURITY_STACKING is specified the blob pointer abstraction functions introduced earlier use the offset information provided by the infrastructure to find the data in the blob that is for use by the acting security module. The mechanism for specifying the active security modules has been changed. SELinux, Smack and AppArmor have behaviors beyond the sharing of security blobs that prevent them from working together at this point. TOMOYO does not have this limitation. Signed-off-by: Casey Schaufler --- Documentation/admin-guide/LSM/index.rst | 14 ++++-- include/linux/lsm_hooks.h | 2 +- security/Kconfig | 86 +++++++++++++++++++++++++++++++++ security/apparmor/include/cred.h | 8 +++ security/apparmor/include/file.h | 9 +++- security/apparmor/include/lib.h | 4 ++ security/apparmor/include/task.h | 4 ++ security/apparmor/lsm.c | 8 ++- security/security.c | 30 +++++++++++- security/selinux/hooks.c | 3 +- security/selinux/include/objsec.h | 35 +++++++++++++- security/smack/smack.h | 33 +++++++++++++ security/smack/smack_lsm.c | 17 +++---- security/tomoyo/common.h | 12 ++++- security/tomoyo/tomoyo.c | 3 +- 15 files changed, 245 insertions(+), 23 deletions(-) diff --git a/Documentation/admin-guide/LSM/index.rst b/Documentation/admin-guide/LSM/index.rst index 9842e21afd4a..d3d8af174042 100644 --- a/Documentation/admin-guide/LSM/index.rst +++ b/Documentation/admin-guide/LSM/index.rst @@ -17,10 +17,16 @@ MAC extensions, other extensions can be built using the LSM to provide specific changes to system operation when these tweaks are not available in the core functionality of Linux itself. -The Linux capabilities modules will always be included. This may be -followed by any number of "minor" modules and at most one "major" module. -For more details on capabilities, see ``capabilities(7)`` in the Linux -man-pages project. +The Linux capabilities modules will always be included. For more details +on capabilities, see ``capabilities(7)`` in the Linux man-pages project. + +Security modules that do not use the security data blobs maintained +by the LSM infrastructure are considered "minor" modules. These may be +included at compile time and stacked explicitly. Security modules that +use the LSM maintained security blobs are considered "major" modules. +These may only be stacked if the CONFIG_LSM_STACKED configuration +option is used. If this is chosen all of the security modules selected +will be used. A list of the active security modules can be found by reading ``/sys/kernel/security/lsm``. This is a comma separated list, and diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h index 5428485750b6..7c461a8aba3e 100644 --- a/include/linux/lsm_hooks.h +++ b/include/linux/lsm_hooks.h @@ -2072,7 +2072,7 @@ static inline void security_delete_hooks(struct security_hook_list *hooks, #define __lsm_ro_after_init __ro_after_init #endif /* CONFIG_SECURITY_WRITABLE_HOOKS */ -extern int __init security_module_enable(const char *module); +extern bool __init security_module_enable(const char *lsm, const bool stacked); extern void __init capability_add_hooks(void); #ifdef CONFIG_SECURITY_YAMA extern void __init yama_add_hooks(void); diff --git a/security/Kconfig b/security/Kconfig index 116dba966553..8225388b81c3 100644 --- a/security/Kconfig +++ b/security/Kconfig @@ -36,6 +36,28 @@ config SECURITY_WRITABLE_HOOKS bool default n +config SECURITY_STACKING + bool "Security module stacking" + depends on SECURITY + help + Allows multiple major security modules to be stacked. + Modules are invoked in the order registered with a + "bail on fail" policy, in which the infrastructure + will stop processing once a denial is detected. Not + all modules can be stacked. SELinux and Smack are + known to be incompatible. User space components may + have trouble identifying the security module providing + data in some cases. + + If you select this option you will have to select which + of the stackable modules you wish to be active. The + "Default security module" will be ignored. The boot line + "security=" option can be used to specify that one of + the modules identifed for stacking should be used instead + of the entire stack. + + If you are unsure how to answer this question, answer N. + config SECURITY_LSM_DEBUG bool "Enable debugging of the LSM infrastructure" depends on SECURITY @@ -251,6 +273,9 @@ source security/yama/Kconfig source security/integrity/Kconfig +menu "Security Module Selection" + visible if !SECURITY_STACKING + choice prompt "Default security module" default DEFAULT_SECURITY_SELINUX if SECURITY_SELINUX @@ -290,3 +315,64 @@ config DEFAULT_SECURITY endmenu +menu "Security Module Stack" + visible if SECURITY_STACKING + +choice + prompt "Stacked 'extreme' security module" + default SECURITY_SELINUX_STACKED if SECURITY_SELINUX + default SECURITY_SMACK_STACKED if SECURITY_SMACK + default SECURITY_APPARMOR_STACKED if SECURITY_APPARMOR + + help + Enable an extreme security module. These modules cannot + be used at the same time. + + config SECURITY_SELINUX_STACKED + bool "SELinux" if SECURITY_SELINUX=y + help + This option instructs the system to use the SELinux checks. + At this time the Smack security module is incompatible with this + module. + At this time the AppArmor security module is incompatible with this + module. + + config SECURITY_SMACK_STACKED + bool "Simplified Mandatory Access Control" if SECURITY_SMACK=y + help + This option instructs the system to use the Smack checks. + At this time the SELinux security module is incompatible with this + module. + At this time the AppArmor security module is incompatible with this + module. + + config SECURITY_APPARMOR_STACKED + bool "AppArmor" if SECURITY_APPARMOR=y + help + This option instructs the system to use the AppArmor checks. + At this time the SELinux security module is incompatible with this + module. + At this time the Smack security module is incompatible with this + module. + + config SECURITY_NOTHING_STACKED + bool "Use no 'extreme' security module" + help + Use none of the SELinux, Smack or AppArmor security module. + +endchoice + +config SECURITY_TOMOYO_STACKED + bool "TOMOYO support is enabled by default" + depends on SECURITY_TOMOYO && SECURITY_STACKING + default n + help + This option instructs the system to use the TOMOYO checks. + If not selected the module will not be invoked. + Stacked security modules may interact in unexpected ways. + + If you are unsure how to answer this question, answer N. + +endmenu + +endmenu diff --git a/security/apparmor/include/cred.h b/security/apparmor/include/cred.h index a90eae76d7c1..be7575adf6f0 100644 --- a/security/apparmor/include/cred.h +++ b/security/apparmor/include/cred.h @@ -25,7 +25,11 @@ static inline struct aa_label *cred_label(const struct cred *cred) { +#ifdef CONFIG_SECURITY_STACKING + struct aa_label **blob = cred->security + apparmor_blob_sizes.lbs_cred; +#else struct aa_label **blob = cred->security; +#endif AA_BUG(!blob); return *blob; @@ -34,7 +38,11 @@ static inline struct aa_label *cred_label(const struct cred *cred) static inline void set_cred_label(const struct cred *cred, struct aa_label *label) { +#ifdef CONFIG_SECURITY_STACKING + struct aa_label **blob = cred->security + apparmor_blob_sizes.lbs_cred; +#else struct aa_label **blob = cred->security; +#endif AA_BUG(!blob); *blob = label; diff --git a/security/apparmor/include/file.h b/security/apparmor/include/file.h index 4c2c8ac8842f..e28811943425 100644 --- a/security/apparmor/include/file.h +++ b/security/apparmor/include/file.h @@ -32,7 +32,14 @@ struct path; AA_MAY_CHMOD | AA_MAY_CHOWN | AA_MAY_LOCK | \ AA_EXEC_MMAP | AA_MAY_LINK) -#define file_ctx(X) ((struct aa_file_ctx *)(X)->f_security) +static inline struct aa_file_ctx *file_ctx(struct file *file) +{ +#ifdef CONFIG_SECURITY_STACKING + return file->f_security + apparmor_blob_sizes.lbs_file; +#else + return file->f_security; +#endif +} /* struct aa_file_ctx - the AppArmor context the file was opened in * @lock: lock to update the ctx diff --git a/security/apparmor/include/lib.h b/security/apparmor/include/lib.h index 6505e1ad9e23..bbe9b384d71d 100644 --- a/security/apparmor/include/lib.h +++ b/security/apparmor/include/lib.h @@ -16,6 +16,7 @@ #include #include +#include #include "match.h" @@ -55,6 +56,9 @@ const char *aa_splitn_fqname(const char *fqname, size_t n, const char **ns_name, size_t *ns_len); void aa_info_message(const char *str); +/* Security blob offsets */ +extern struct lsm_blob_sizes apparmor_blob_sizes; + /** * aa_strneq - compare null terminated @str to a non null terminated substring * @str: a null terminated string diff --git a/security/apparmor/include/task.h b/security/apparmor/include/task.h index 039c1e60887a..4fbe9370e6e0 100644 --- a/security/apparmor/include/task.h +++ b/security/apparmor/include/task.h @@ -16,7 +16,11 @@ static inline struct aa_task_ctx *task_ctx(struct task_struct *task) { +#ifdef CONFIG_SECURITY_STACKING + return task->security + apparmor_blob_sizes.lbs_task; +#else return task->security; +#endif } /* diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c index e3890899a10c..1943ff17e0df 100644 --- a/security/apparmor/lsm.c +++ b/security/apparmor/lsm.c @@ -1508,7 +1508,9 @@ static int __init apparmor_init(void) int error; if (!finish) { - if (apparmor_enabled && security_module_enable("apparmor")) + if (apparmor_enabled && + security_module_enable("apparmor", + IS_ENABLED(CONFIG_SECURITY_APPARMOR_STACKED))) security_add_blobs(&apparmor_blob_sizes); else apparmor_enabled = false; @@ -1516,7 +1518,9 @@ static int __init apparmor_init(void) return 0; } - if (!apparmor_enabled || !security_module_enable("apparmor")) { + if (!apparmor_enabled || + !security_module_enable("apparmor", + IS_ENABLED(CONFIG_SECURITY_APPARMOR_STACKED))) { aa_info_message("AppArmor disabled by boot time parameter"); apparmor_enabled = false; return 0; diff --git a/security/security.c b/security/security.c index 412dba75da65..e0f01cdd1830 100644 --- a/security/security.c +++ b/security/security.c @@ -38,6 +38,7 @@ /* Maximum number of letters for an LSM name string */ #define SECURITY_NAME_MAX 10 +#define MODULE_STACK "(stacking)" struct security_hook_heads security_hook_heads __lsm_ro_after_init; static ATOMIC_NOTIFIER_HEAD(lsm_notifier_chain); @@ -50,7 +51,11 @@ static struct lsm_blob_sizes blob_sizes; /* Boot-time LSM user choice */ static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] = +#ifdef CONFIG_SECURITY_STACKING + MODULE_STACK; +#else CONFIG_DEFAULT_SECURITY; +#endif static void __init do_security_initcalls(void) { @@ -174,6 +179,7 @@ static int lsm_append(char *new, char **result) /** * security_module_enable - Load given security module on boot ? * @module: the name of the module + * @stacked: indicates that the module wants to be stacked * * Each LSM must pass this method before registering its own operations * to avoid security registration races. This method may also be used @@ -189,9 +195,29 @@ static int lsm_append(char *new, char **result) * * Otherwise, return false. */ -int __init security_module_enable(const char *module) +bool __init security_module_enable(const char *lsm, const bool stacked) { - return !strcmp(module, chosen_lsm); +#ifdef CONFIG_SECURITY_STACKING + /* + * Module defined on the command line security=XXXX + */ + if (strcmp(chosen_lsm, MODULE_STACK)) { + if (!strcmp(lsm, chosen_lsm)) { + pr_info("Command line sets the %s security module.\n", + lsm); + return true; + } + return false; + } + /* + * Module configured as stacked. + */ + return stacked; +#else + if (strcmp(lsm, chosen_lsm) == 0) + return true; + return false; +#endif } /** diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index f3531e5bc3d9..1b81b74b8f84 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -6906,7 +6906,8 @@ static __init int selinux_init(void) { static int finish; - if (!security_module_enable("selinux")) { + if (!security_module_enable("selinux", + IS_ENABLED(CONFIG_SECURITY_SELINUX_STACKED))) { selinux_enabled = 0; return 0; } diff --git a/security/selinux/include/objsec.h b/security/selinux/include/objsec.h index 6092786c5828..da5b3eaa5a58 100644 --- a/security/selinux/include/objsec.h +++ b/security/selinux/include/objsec.h @@ -161,47 +161,80 @@ struct bpf_security_struct { extern struct lsm_blob_sizes selinux_blob_sizes; static inline struct task_security_struct *selinux_cred(const struct cred *cred) { +#ifdef CONFIG_SECURITY_STACKING + return cred->security + selinux_blob_sizes.lbs_cred; +#else return cred->security; +#endif } static inline struct file_security_struct *selinux_file(const struct file *file) { +#ifdef CONFIG_SECURITY_STACKING + return file->f_security + selinux_blob_sizes.lbs_file; +#else return file->f_security; +#endif } -static inline struct inode_security_struct *selinux_inode(const struct inode *inode) +static inline struct inode_security_struct *selinux_inode( + const struct inode *inode) { +#ifdef CONFIG_SECURITY_STACKING + return inode->i_security + selinux_blob_sizes.lbs_inode; +#else return inode->i_security; +#endif } static inline struct superblock_security_struct *selinux_superblock( const struct super_block *superblock) { +#ifdef CONFIG_SECURITY_STACKING + return superblock->s_security + selinux_blob_sizes.lbs_superblock; +#else return superblock->s_security; +#endif } static inline struct msg_security_struct *selinux_msg_msg( const struct msg_msg *msg_msg) { +#ifdef CONFIG_SECURITY_STACKING + return msg_msg->security + selinux_blob_sizes.lbs_msg_msg; +#else return msg_msg->security; +#endif } static inline struct ipc_security_struct *selinux_ipc( const struct kern_ipc_perm *ipc) { +#ifdef CONFIG_SECURITY_STACKING + return ipc->security + selinux_blob_sizes.lbs_ipc; +#else return ipc->security; +#endif } #ifdef CONFIG_KEYS static inline struct key_security_struct *selinux_key(const struct key *key) { +#ifdef CONFIG_SECURITY_STACKING + return key->security + selinux_blob_sizes.lbs_key; +#else return key->security; +#endif } #endif /* CONFIG_KEYS */ static inline struct sk_security_struct *selinux_sock(const struct sock *sock) { +#ifdef CONFIG_SECURITY_STACKING + return sock->sk_security + selinux_blob_sizes.lbs_sock; +#else return sock->sk_security; +#endif } #endif /* _SELINUX_OBJSEC_H_ */ diff --git a/security/smack/smack.h b/security/smack/smack.h index e50ed4945a40..87ced0fc1a19 100644 --- a/security/smack/smack.h +++ b/security/smack/smack.h @@ -337,6 +337,7 @@ extern struct smack_known *smack_syslog_label; extern struct smack_known *smack_unconfined; #endif extern int smack_ptrace_rule; +extern struct lsm_blob_sizes smack_blob_sizes; extern struct smack_known smack_known_floor; extern struct smack_known smack_known_hat; @@ -359,44 +360,76 @@ extern struct hlist_head smack_known_hash[SMACK_HASH_SLOTS]; static inline struct task_smack *smack_cred(const struct cred *cred) { +#ifdef CONFIG_SECURITY_STACKING + return cred->security + smack_blob_sizes.lbs_cred; +#else return cred->security; +#endif } static inline struct smack_known **smack_file(const struct file *file) { +#ifdef CONFIG_SECURITY_STACKING + return file->f_security + smack_blob_sizes.lbs_file; +#else return file->f_security; +#endif } static inline struct inode_smack *smack_inode(const struct inode *inode) { +#ifdef CONFIG_SECURITY_STACKING + return inode->i_security + smack_blob_sizes.lbs_inode; +#else return inode->i_security; +#endif } static inline struct socket_smack *smack_sock(const struct sock *sock) { +#ifdef CONFIG_SECURITY_STACKING + return sock->sk_security + smack_blob_sizes.lbs_sock; +#else return sock->sk_security; +#endif } static inline struct superblock_smack *smack_superblock( const struct super_block *superblock) { +#ifdef CONFIG_SECURITY_STACKING + return superblock->s_security + smack_blob_sizes.lbs_superblock; +#else return superblock->s_security; +#endif } static inline struct smack_known **smack_msg_msg(const struct msg_msg *msg) { +#ifdef CONFIG_SECURITY_STACKING + return msg->security + smack_blob_sizes.lbs_msg_msg; +#else return msg->security; +#endif } static inline struct smack_known **smack_ipc(const struct kern_ipc_perm *ipc) { +#ifdef CONFIG_SECURITY_STACKING + return ipc->security + smack_blob_sizes.lbs_ipc; +#else return ipc->security; +#endif } #ifdef CONFIG_KEYS static inline struct smack_known **smack_key(const struct key *key) { +#ifdef CONFIG_SECURITY_STACKING + return key->security + smack_blob_sizes.lbs_key; +#else return key->security; +#endif } #endif /* CONFIG_KEYS */ diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index c15861eb3606..4cc3d6e04e10 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -3432,18 +3432,16 @@ static int smack_getprocattr(struct task_struct *p, char *name, char **value) { struct smack_known *skp = smk_of_task_struct(p); char *cp; - int slen; - if (strcmp(name, "current") != 0) + if (strcmp(name, "current") == 0) { + cp = kstrdup(skp->smk_known, GFP_KERNEL); + if (cp == NULL) + return -ENOMEM; + } else return -EINVAL; - cp = kstrdup(skp->smk_known, GFP_KERNEL); - if (cp == NULL) - return -ENOMEM; - - slen = strlen(cp); *value = cp; - return slen; + return strlen(cp); } /** @@ -4683,7 +4681,8 @@ static __init int smack_init(void) struct cred *cred = (struct cred *) current->cred; struct task_smack *tsp; - if (!security_module_enable("smack")) + if (!security_module_enable("smack", + IS_ENABLED(CONFIG_SECURITY_SMACK_STACKED))) return 0; if (!finish) { diff --git a/security/tomoyo/common.h b/security/tomoyo/common.h index 0110bebe86e2..f386f92c57c5 100644 --- a/security/tomoyo/common.h +++ b/security/tomoyo/common.h @@ -1087,6 +1087,7 @@ extern struct tomoyo_domain_info tomoyo_kernel_domain; extern struct tomoyo_policy_namespace tomoyo_kernel_namespace; extern unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT]; extern unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT]; +extern struct lsm_blob_sizes tomoyo_blob_sizes; /********** Inlined functions. **********/ @@ -1206,7 +1207,11 @@ static inline void tomoyo_put_group(struct tomoyo_group *group) */ static inline struct tomoyo_domain_info **tomoyo_cred(const struct cred *cred) { +#ifdef CONFIG_SECURITY_STACKING + return cred->security + tomoyo_blob_sizes.lbs_cred; +#else return cred->security; +#endif } /** @@ -1216,8 +1221,13 @@ static inline struct tomoyo_domain_info **tomoyo_cred(const struct cred *cred) */ static inline struct tomoyo_domain_info *tomoyo_domain(void) { - struct tomoyo_domain_info **blob = tomoyo_cred(current_cred()); + const struct cred *cred = current_cred(); + struct tomoyo_domain_info **blob; + + if (cred->security == NULL) + return NULL; + blob = tomoyo_cred(cred); return *blob; } diff --git a/security/tomoyo/tomoyo.c b/security/tomoyo/tomoyo.c index 821ca242a194..eb4b886b6076 100644 --- a/security/tomoyo/tomoyo.c +++ b/security/tomoyo/tomoyo.c @@ -564,7 +564,8 @@ static int __init tomoyo_init(void) struct cred *cred = (struct cred *) current_cred(); struct tomoyo_domain_info **blob; - if (!security_module_enable("tomoyo")) { + if (!security_module_enable("tomoyo", + IS_ENABLED(CONFIG_SECURITY_TOMOYO_STACKED))) { tomoyo_enabled = false; return 0; }