[v2,07/13] LSM: Use lsmblob in security_current_getsecid

Message ID	20240830003411.16818-8-casey@schaufler-ca.com (mailing list archive)
State	Changes Requested
Delegated to:	Paul Moore
Headers	show Received: from sonic308-16.consmr.mail.ne1.yahoo.com (sonic308-16.consmr.mail.ne1.yahoo.com [66.163.187.39]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3D2504409 for <linux-security-module@vger.kernel.org>; Fri, 30 Aug 2024 00:37:34 +0000 (UTC) From: Casey Schaufler <casey@schaufler-ca.com> To: casey@schaufler-ca.com, paul@paul-moore.com, linux-security-module@vger.kernel.org Cc: jmorris@namei.org, serge@hallyn.com, keescook@chromium.org, john.johansen@canonical.com, penguin-kernel@i-love.sakura.ne.jp, stephen.smalley.work@gmail.com, linux-kernel@vger.kernel.org, selinux@vger.kernel.org, mic@digikod.net, linux-integrity@vger.kernel.org, audit@vger.kernel.org Subject: [PATCH v2 07/13] LSM: Use lsmblob in security_current_getsecid Date: Thu, 29 Aug 2024 17:34:05 -0700 Message-ID: <20240830003411.16818-8-casey@schaufler-ca.com> In-Reply-To: <20240830003411.16818-1-casey@schaufler-ca.com> References: <20240830003411.16818-1-casey@schaufler-ca.com> Precedence: bulk MIME-Version: 1.0 Content-Transfer-Encoding: 8bit
Series	LSM: Move away from secids \| expand [v2,00/13] LSM: Move away from secids [v2,01/13] LSM: Add the lsmblob data structure. [v2,02/13] LSM: Use lsmblob in security_audit_rule_match [v2,03/13] LSM: Add lsmblob_to_secctx hook [v2,04/13] Audit: maintain an lsmblob in audit_context [v2,05/13] LSM: Use lsmblob in security_ipc_getsecid [v2,06/13] Audit: Update shutdown LSM data [v2,07/13] LSM: Use lsmblob in security_current_getsecid [v2,08/13] LSM: Use lsmblob in security_inode_getsecid [v2,09/13] Audit: use an lsmblob in audit_names [v2,10/13] LSM: Create new security_cred_getlsmblob LSM hook [v2,11/13] Audit: Change context data from secid to lsmblob [v2,12/13] Netlabel: Use lsmblob for audit data [v2,13/13] LSM: Remove lsmblob scaffolding

diff --git a/include/linux/lsm_hook_defs.h b/include/linux/lsm_hook_defs.h index c3ffc3f98343..06c60f1aefa7 100644 --- a/include/linux/lsm_hook_defs.h +++ b/include/linux/lsm_hook_defs.h @@ -232,9 +232,9 @@ LSM_HOOK(int, 0, task_fix_setgroups, struct cred *new, const struct cred * old) LSM_HOOK(int, 0, task_setpgid, struct task_struct *p, pid_t pgid) LSM_HOOK(int, 0, task_getpgid, struct task_struct *p) LSM_HOOK(int, 0, task_getsid, struct task_struct *p) -LSM_HOOK(void, LSM_RET_VOID, current_getsecid_subj, u32 *secid) -LSM_HOOK(void, LSM_RET_VOID, task_getsecid_obj, - struct task_struct *p, u32 *secid) +LSM_HOOK(void, LSM_RET_VOID, current_getlsmblob_subj, struct lsmblob *blob) +LSM_HOOK(void, LSM_RET_VOID, task_getlsmblob_obj, + struct task_struct *p, struct lsmblob *blob) LSM_HOOK(int, 0, task_setnice, struct task_struct *p, int nice) LSM_HOOK(int, 0, task_setioprio, struct task_struct *p, int ioprio) LSM_HOOK(int, 0, task_getioprio, struct task_struct *p) diff --git a/include/linux/security.h b/include/linux/security.h index ebe8edaae953..b28f2f7fe4ef 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -492,8 +492,8 @@ int security_task_fix_setgroups(struct cred *new, const struct cred *old); int security_task_setpgid(struct task_struct *p, pid_t pgid); int security_task_getpgid(struct task_struct *p); int security_task_getsid(struct task_struct *p); -void security_current_getsecid_subj(u32 *secid); -void security_task_getsecid_obj(struct task_struct *p, u32 *secid); +void security_current_getlsmblob_subj(struct lsmblob *blob); +void security_task_getlsmblob_obj(struct task_struct *p, struct lsmblob *blob); int security_task_setnice(struct task_struct *p, int nice); int security_task_setioprio(struct task_struct *p, int ioprio); int security_task_getioprio(struct task_struct *p); @@ -1268,14 +1268,15 @@ static inline int security_task_getsid(struct task_struct *p) return 0; } -static inline void security_current_getsecid_subj(u32 *secid) +static inline void security_current_getlsmblob_subj(struct lsmblob *blob) { - *secid = 0; + lsmblob_init(blob); } -static inline void security_task_getsecid_obj(struct task_struct *p, u32 *secid) +static inline void security_task_getlsmblob_obj(struct task_struct *p, + struct lsmblob *blob) { - *secid = 0; + lsmblob_init(blob); } static inline int security_task_setnice(struct task_struct *p, int nice) diff --git a/kernel/audit.c b/kernel/audit.c index 9dac776b60a7..97c0dea0e3a1 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -2179,16 +2179,16 @@ void audit_log_key(struct audit_buffer *ab, char *key) int audit_log_task_context(struct audit_buffer *ab) { + struct lsmblob blob; char *ctx = NULL; unsigned len; int error; - u32 sid; - security_current_getsecid_subj(&sid); - if (!sid) + security_current_getlsmblob_subj(&blob); + if (!lsmblob_is_set(&blob)) return 0; - error = security_secid_to_secctx(sid, &ctx, &len); + error = security_lsmblob_to_secctx(&blob, &ctx, &len); if (error) { if (error != -EINVAL) goto error_path; @@ -2405,8 +2405,7 @@ int audit_signal_info(int sig, struct task_struct *t) audit_sig_uid = auid; else audit_sig_uid = uid; - /* scaffolding */ - security_current_getsecid_subj(&audit_sig_lsm.scaffold.secid); + security_current_getlsmblob_subj(&audit_sig_lsm); } return audit_signal_info_syscall(t); diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c index c4c7cda3b846..06309227a0eb 100644 --- a/kernel/auditfilter.c +++ b/kernel/auditfilter.c @@ -1371,8 +1371,7 @@ int audit_filter(int msgtype, unsigned int listtype) case AUDIT_SUBJ_CLR: if (f->lsm_rule) { /* scaffolding */ - security_current_getsecid_subj( - &blob.scaffold.secid); + security_current_getlsmblob_subj(&blob); result = security_audit_rule_match( &blob, f->type, f->op, f->lsm_rule); diff --git a/kernel/auditsc.c b/kernel/auditsc.c index 94b7ef89da2e..1f05445978f9 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -470,7 +470,6 @@ static int audit_filter_rules(struct task_struct *tsk, { const struct cred *cred; int i, need_sid = 1; - u32 sid; struct lsmblob blob = { }; unsigned int sessionid; @@ -675,15 +674,14 @@ static int audit_filter_rules(struct task_struct *tsk, * fork()/copy_process() in which case * the new @tsk creds are still a dup * of @current's creds so we can still - * use security_current_getsecid_subj() + * use + * security_current_getlsmblob_subj() * here even though it always refs * @current's creds */ - security_current_getsecid_subj(&sid); + security_current_getlsmblob_subj(&blob); need_sid = 0; } - /* scaffolding */ - blob.scaffold.secid = sid; result = security_audit_rule_match(&blob, f->type, f->op, @@ -2730,12 +2728,15 @@ int __audit_sockaddr(int len, void *a) void __audit_ptrace(struct task_struct *t) { struct audit_context *context = audit_context(); + struct lsmblob blob; context->target_pid = task_tgid_nr(t); context->target_auid = audit_get_loginuid(t); context->target_uid = task_uid(t); context->target_sessionid = audit_get_sessionid(t); - security_task_getsecid_obj(t, &context->target_sid); + security_task_getlsmblob_obj(t, &blob); + /* scaffolding */ + context->target_sid = blob.scaffold.secid; memcpy(context->target_comm, t->comm, TASK_COMM_LEN); } @@ -2751,6 +2752,7 @@ int audit_signal_info_syscall(struct task_struct *t) struct audit_aux_data_pids *axp; struct audit_context *ctx = audit_context(); kuid_t t_uid = task_uid(t); + struct lsmblob blob; if (!audit_signals || audit_dummy_context()) return 0; @@ -2762,7 +2764,9 @@ int audit_signal_info_syscall(struct task_struct *t) ctx->target_auid = audit_get_loginuid(t); ctx->target_uid = t_uid; ctx->target_sessionid = audit_get_sessionid(t); - security_task_getsecid_obj(t, &ctx->target_sid); + security_task_getlsmblob_obj(t, &blob); + /* scaffolding */ + ctx->target_sid = blob.scaffold.secid; memcpy(ctx->target_comm, t->comm, TASK_COMM_LEN); return 0; } @@ -2783,7 +2787,9 @@ int audit_signal_info_syscall(struct task_struct *t) axp->target_auid[axp->pid_count] = audit_get_loginuid(t); axp->target_uid[axp->pid_count] = t_uid; axp->target_sessionid[axp->pid_count] = audit_get_sessionid(t); - security_task_getsecid_obj(t, &axp->target_sid[axp->pid_count]); + security_task_getlsmblob_obj(t, &blob); + /* scaffolding */ + axp->target_sid[axp->pid_count] = blob.scaffold.secid; memcpy(axp->target_comm[axp->pid_count], t->comm, TASK_COMM_LEN); axp->pid_count++; diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c index 9996883bf2b7..7f38dc9b6b57 100644 --- a/net/netlabel/netlabel_unlabeled.c +++ b/net/netlabel/netlabel_unlabeled.c @@ -1534,11 +1534,14 @@ int __init netlbl_unlabel_defconf(void) int ret_val; struct netlbl_dom_map *entry; struct netlbl_audit audit_info; + struct lsmblob blob; /* Only the kernel is allowed to call this function and the only time * it is called is at bootup before the audit subsystem is reporting * messages so don't worry to much about these values. */ - security_current_getsecid_subj(&audit_info.secid); + security_current_getlsmblob_subj(&blob); + /* scaffolding */ + audit_info.secid = blob.scaffold.secid; audit_info.loginuid = GLOBAL_ROOT_UID; audit_info.sessionid = 0; diff --git a/net/netlabel/netlabel_user.h b/net/netlabel/netlabel_user.h index d6c5b31eb4eb..40841d7af1d8 100644 --- a/net/netlabel/netlabel_user.h +++ b/net/netlabel/netlabel_user.h @@ -32,7 +32,11 @@ */ static inline void netlbl_netlink_auditinfo(struct netlbl_audit *audit_info) { - security_current_getsecid_subj(&audit_info->secid); + struct lsmblob blob; + + security_current_getlsmblob_subj(&blob); + /* scaffolding */ + audit_info->secid = blob.scaffold.secid; audit_info->loginuid = audit_get_loginuid(current); audit_info->sessionid = audit_get_sessionid(current); } diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c index 050d103f5ca5..877c4e809ae8 100644 --- a/security/apparmor/lsm.c +++ b/security/apparmor/lsm.c @@ -982,17 +982,24 @@ static void apparmor_bprm_committed_creds(const struct linux_binprm *bprm) return; } -static void apparmor_current_getsecid_subj(u32 *secid) +static void apparmor_current_getlsmblob_subj(struct lsmblob *blob) { struct aa_label *label = __begin_current_label_crit_section(); - *secid = label->secid; + + blob->apparmor.label = label; + /* scaffolding */ + blob->scaffold.secid = label->secid; __end_current_label_crit_section(label); } -static void apparmor_task_getsecid_obj(struct task_struct *p, u32 *secid) +static void apparmor_task_getlsmblob_obj(struct task_struct *p, + struct lsmblob *blob) { struct aa_label *label = aa_get_task_label(p); - *secid = label->secid; + + blob->apparmor.label = label; + /* scaffolding */ + blob->scaffold.secid = label->secid; aa_put_label(label); } @@ -1518,8 +1525,9 @@ static struct security_hook_list apparmor_hooks[] __ro_after_init = { LSM_HOOK_INIT(task_free, apparmor_task_free), LSM_HOOK_INIT(task_alloc, apparmor_task_alloc), - LSM_HOOK_INIT(current_getsecid_subj, apparmor_current_getsecid_subj), - LSM_HOOK_INIT(task_getsecid_obj, apparmor_task_getsecid_obj), + LSM_HOOK_INIT(current_getlsmblob_subj, + apparmor_current_getlsmblob_subj), + LSM_HOOK_INIT(task_getlsmblob_obj, apparmor_task_getlsmblob_obj), LSM_HOOK_INIT(task_setrlimit, apparmor_task_setrlimit), LSM_HOOK_INIT(task_kill, apparmor_task_kill), LSM_HOOK_INIT(userns_create, apparmor_userns_create), diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h index c51e24d24d1e..64bd77aa28e9 100644 --- a/security/integrity/ima/ima.h +++ b/security/integrity/ima/ima.h @@ -369,7 +369,7 @@ static inline void ima_process_queued_keys(void) {} /* LIM API function definitions */ int ima_get_action(struct mnt_idmap *idmap, struct inode *inode, - const struct cred *cred, u32 secid, int mask, + const struct cred *cred, struct lsmblob *blob, int mask, enum ima_hooks func, int *pcr, struct ima_template_desc **template_desc, const char *func_data, unsigned int *allowed_algos); @@ -400,8 +400,8 @@ const char *ima_d_path(const struct path *path, char **pathbuf, char *filename); /* IMA policy related functions */ int ima_match_policy(struct mnt_idmap *idmap, struct inode *inode, - const struct cred *cred, u32 secid, enum ima_hooks func, - int mask, int flags, int *pcr, + const struct cred *cred, struct lsmblob *blob, + enum ima_hooks func, int mask, int flags, int *pcr, struct ima_template_desc **template_desc, const char *func_data, unsigned int *allowed_algos); void ima_init_policy(void); diff --git a/security/integrity/ima/ima_api.c b/security/integrity/ima/ima_api.c index 984e861f6e33..896cf716dd6d 100644 --- a/security/integrity/ima/ima_api.c +++ b/security/integrity/ima/ima_api.c @@ -165,7 +165,7 @@ void ima_add_violation(struct file *file, const unsigned char *filename, * @idmap: idmap of the mount the inode was found from * @inode: pointer to the inode associated with the object being validated * @cred: pointer to credentials structure to validate - * @secid: secid of the task being validated + * @blob: secid(s) of the task being validated * @mask: contains the permission mask (MAY_READ, MAY_WRITE, MAY_EXEC, * MAY_APPEND) * @func: caller identifier @@ -187,7 +187,7 @@ void ima_add_violation(struct file *file, const unsigned char *filename, * */ int ima_get_action(struct mnt_idmap *idmap, struct inode *inode, - const struct cred *cred, u32 secid, int mask, + const struct cred *cred, struct lsmblob *blob, int mask, enum ima_hooks func, int *pcr, struct ima_template_desc **template_desc, const char *func_data, unsigned int *allowed_algos) @@ -196,7 +196,7 @@ int ima_get_action(struct mnt_idmap *idmap, struct inode *inode, flags &= ima_policy_flag; - return ima_match_policy(idmap, inode, cred, secid, func, mask, + return ima_match_policy(idmap, inode, cred, blob, func, mask, flags, pcr, template_desc, func_data, allowed_algos); } diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c index 656c709b974f..b0db2f38efc6 100644 --- a/security/integrity/ima/ima_appraise.c +++ b/security/integrity/ima/ima_appraise.c @@ -73,13 +73,13 @@ bool is_ima_appraise_enabled(void) int ima_must_appraise(struct mnt_idmap *idmap, struct inode *inode, int mask, enum ima_hooks func) { - u32 secid; + struct lsmblob blob; if (!ima_appraise) return 0; - security_current_getsecid_subj(&secid); - return ima_match_policy(idmap, inode, current_cred(), secid, + security_current_getlsmblob_subj(&blob); + return ima_match_policy(idmap, inode, current_cred(), &blob, func, mask, IMA_APPRAISE | IMA_HASH, NULL, NULL, NULL, NULL); } diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c index f04f43af651c..d408a700fe6f 100644 --- a/security/integrity/ima/ima_main.c +++ b/security/integrity/ima/ima_main.c @@ -206,8 +206,8 @@ static void ima_file_free(struct file *file) } static int process_measurement(struct file *file, const struct cred *cred, - u32 secid, char *buf, loff_t size, int mask, - enum ima_hooks func) + struct lsmblob *blob, char *buf, loff_t size, + int mask, enum ima_hooks func) { struct inode *real_inode, *inode = file_inode(file); struct ima_iint_cache *iint = NULL; @@ -232,7 +232,7 @@ static int process_measurement(struct file *file, const struct cred *cred, * bitmask based on the appraise/audit/measurement policy. * Included is the appraise submask. */ - action = ima_get_action(file_mnt_idmap(file), inode, cred, secid, + action = ima_get_action(file_mnt_idmap(file), inode, cred, blob, mask, func, &pcr, &template_desc, NULL, &allowed_algos); violation_check = ((func == FILE_CHECK || func == MMAP_CHECK || @@ -443,23 +443,23 @@ static int process_measurement(struct file *file, const struct cred *cred, static int ima_file_mmap(struct file *file, unsigned long reqprot, unsigned long prot, unsigned long flags) { - u32 secid; + struct lsmblob blob; int ret; if (!file) return 0; - security_current_getsecid_subj(&secid); + security_current_getlsmblob_subj(&blob); if (reqprot & PROT_EXEC) { - ret = process_measurement(file, current_cred(), secid, NULL, + ret = process_measurement(file, current_cred(), &blob, NULL, 0, MAY_EXEC, MMAP_CHECK_REQPROT); if (ret) return ret; } if (prot & PROT_EXEC) - return process_measurement(file, current_cred(), secid, NULL, + return process_measurement(file, current_cred(), &blob, NULL, 0, MAY_EXEC, MMAP_CHECK); return 0; @@ -488,9 +488,9 @@ static int ima_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, char *pathbuf = NULL; const char *pathname = NULL; struct inode *inode; + struct lsmblob blob; int result = 0; int action; - u32 secid; int pcr; /* Is mprotect making an mmap'ed file executable? */ @@ -498,13 +498,13 @@ static int ima_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, !(prot & PROT_EXEC) || (vma->vm_flags & VM_EXEC)) return 0; - security_current_getsecid_subj(&secid); + security_current_getlsmblob_subj(&blob); inode = file_inode(vma->vm_file); action = ima_get_action(file_mnt_idmap(vma->vm_file), inode, - current_cred(), secid, MAY_EXEC, MMAP_CHECK, + current_cred(), &blob, MAY_EXEC, MMAP_CHECK, &pcr, &template, NULL, NULL); action |= ima_get_action(file_mnt_idmap(vma->vm_file), inode, - current_cred(), secid, MAY_EXEC, + current_cred(), &blob, MAY_EXEC, MMAP_CHECK_REQPROT, &pcr, &template, NULL, NULL); @@ -542,15 +542,18 @@ static int ima_bprm_check(struct linux_binprm *bprm) { int ret; u32 secid; + struct lsmblob blob = { }; - security_current_getsecid_subj(&secid); - ret = process_measurement(bprm->file, current_cred(), secid, NULL, 0, - MAY_EXEC, BPRM_CHECK); + security_current_getlsmblob_subj(&blob); + ret = process_measurement(bprm->file, current_cred(), + &blob, NULL, 0, MAY_EXEC, BPRM_CHECK); if (ret) return ret; security_cred_getsecid(bprm->cred, &secid); - return process_measurement(bprm->file, bprm->cred, secid, NULL, 0, + /* scaffolding */ + blob.scaffold.secid = secid; + return process_measurement(bprm->file, bprm->cred, &blob, NULL, 0, MAY_EXEC, CREDS_CHECK); } @@ -566,10 +569,10 @@ static int ima_bprm_check(struct linux_binprm *bprm) */ static int ima_file_check(struct file *file, int mask) { - u32 secid; + struct lsmblob blob; - security_current_getsecid_subj(&secid); - return process_measurement(file, current_cred(), secid, NULL, 0, + security_current_getlsmblob_subj(&blob); + return process_measurement(file, current_cred(), &blob, NULL, 0, mask & (MAY_READ | MAY_WRITE | MAY_EXEC | MAY_APPEND), FILE_CHECK); } @@ -768,7 +771,7 @@ static int ima_read_file(struct file *file, enum kernel_read_file_id read_id, bool contents) { enum ima_hooks func; - u32 secid; + struct lsmblob blob; /* * Do devices using pre-allocated memory run the risk of the @@ -788,9 +791,9 @@ static int ima_read_file(struct file *file, enum kernel_read_file_id read_id, /* Read entire file for all partial reads. */ func = read_idmap[read_id] ?: FILE_CHECK; - security_current_getsecid_subj(&secid); - return process_measurement(file, current_cred(), secid, NULL, - 0, MAY_READ, func); + security_current_getlsmblob_subj(&blob); + return process_measurement(file, current_cred(), &blob, NULL, 0, + MAY_READ, func); } const int read_idmap[READING_MAX_ID] = { @@ -818,7 +821,7 @@ static int ima_post_read_file(struct file *file, char *buf, loff_t size, enum kernel_read_file_id read_id) { enum ima_hooks func; - u32 secid; + struct lsmblob blob; /* permit signed certs */ if (!file && read_id == READING_X509_CERTIFICATE) @@ -831,8 +834,8 @@ static int ima_post_read_file(struct file *file, char *buf, loff_t size, } func = read_idmap[read_id] ?: FILE_CHECK; - security_current_getsecid_subj(&secid); - return process_measurement(file, current_cred(), secid, buf, size, + security_current_getlsmblob_subj(&blob); + return process_measurement(file, current_cred(), &blob, buf, size, MAY_READ, func); } @@ -967,7 +970,7 @@ int process_buffer_measurement(struct mnt_idmap *idmap, int digest_hash_len = hash_digest_size[ima_hash_algo]; int violation = 0; int action = 0; - u32 secid; + struct lsmblob blob; if (digest && digest_len < digest_hash_len) return -EINVAL; @@ -990,9 +993,9 @@ int process_buffer_measurement(struct mnt_idmap *idmap, * buffer measurements. */ if (func) { - security_current_getsecid_subj(&secid); + security_current_getlsmblob_subj(&blob); action = ima_get_action(idmap, inode, current_cred(), - secid, 0, func, &pcr, &template, + &blob, 0, func, &pcr, &template, func_data, NULL); if (!(action & IMA_MEASURE) && !digest) return -ENOENT; diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c index 40119816b848..33bdbd031673 100644 --- a/security/integrity/ima/ima_policy.c +++ b/security/integrity/ima/ima_policy.c @@ -557,7 +557,7 @@ static bool ima_match_rule_data(struct ima_rule_entry *rule, * @idmap: idmap of the mount the inode was found from * @inode: a pointer to an inode * @cred: a pointer to a credentials structure for user validation - * @secid: the secid of the task to be validated + * @blob: the secid(s) of the task to be validated * @func: LIM hook identifier * @mask: requested action (MAY_READ | MAY_WRITE | MAY_APPEND | MAY_EXEC) * @func_data: func specific data, may be NULL @@ -567,7 +567,7 @@ static bool ima_match_rule_data(struct ima_rule_entry *rule, static bool ima_match_rules(struct ima_rule_entry *rule, struct mnt_idmap *idmap, struct inode *inode, const struct cred *cred, - u32 secid, enum ima_hooks func, int mask, + struct lsmblob *blob, enum ima_hooks func, int mask, const char *func_data) { int i; @@ -658,8 +658,6 @@ static bool ima_match_rules(struct ima_rule_entry *rule, case LSM_SUBJ_USER: case LSM_SUBJ_ROLE: case LSM_SUBJ_TYPE: - /* scaffolding */ - blob.scaffold.secid = secid; rc = ima_filter_rule_match(&blob, lsm_rule->lsm[i].type, Audit_equal, lsm_rule->lsm[i].rule); @@ -723,7 +721,7 @@ static int get_subaction(struct ima_rule_entry *rule, enum ima_hooks func) * @inode: pointer to an inode for which the policy decision is being made * @cred: pointer to a credentials structure for which the policy decision is * being made - * @secid: LSM secid of the task to be validated + * @blob: LSM secid(s) of the task to be validated * @func: IMA hook identifier * @mask: requested action (MAY_READ | MAY_WRITE | MAY_APPEND | MAY_EXEC) * @flags: IMA actions to consider (e.g. IMA_MEASURE | IMA_APPRAISE) @@ -740,8 +738,8 @@ static int get_subaction(struct ima_rule_entry *rule, enum ima_hooks func) * than writes so ima_match_policy() is classical RCU candidate. */ int ima_match_policy(struct mnt_idmap *idmap, struct inode *inode, - const struct cred *cred, u32 secid, enum ima_hooks func, - int mask, int flags, int *pcr, + const struct cred *cred, struct lsmblob *blob, + enum ima_hooks func, int mask, int flags, int *pcr, struct ima_template_desc **template_desc, const char *func_data, unsigned int *allowed_algos) { @@ -759,7 +757,7 @@ int ima_match_policy(struct mnt_idmap *idmap, struct inode *inode, if (!(entry->action & actmask)) continue; - if (!ima_match_rules(entry, idmap, inode, cred, secid, + if (!ima_match_rules(entry, idmap, inode, cred, blob, func, mask, func_data)) continue; diff --git a/security/security.c b/security/security.c index 6e72e678b5b4..b6e28e20ac51 100644 --- a/security/security.c +++ b/security/security.c @@ -3373,33 +3373,33 @@ int security_task_getsid(struct task_struct *p) } /** - * security_current_getsecid_subj() - Get the current task's subjective secid - * @secid: secid value + * security_current_getlsmblob_subj() - Current task's subjective LSM data + * @blob: lsm specific information * * Retrieve the subjective security identifier of the current task and return - * it in @secid. In case of failure, @secid will be set to zero. + * it in @blob. */ -void security_current_getsecid_subj(u32 *secid) +void security_current_getlsmblob_subj(struct lsmblob *blob) { - *secid = 0; - call_void_hook(current_getsecid_subj, secid); + lsmblob_init(blob); + call_void_hook(current_getlsmblob_subj, blob); } -EXPORT_SYMBOL(security_current_getsecid_subj); +EXPORT_SYMBOL(security_current_getlsmblob_subj); /** - * security_task_getsecid_obj() - Get a task's objective secid + * security_task_getlsmblob_obj() - Get a task's objective LSM data * @p: target task - * @secid: secid value + * @blob: lsm specific information * * Retrieve the objective security identifier of the task_struct in @p and - * return it in @secid. In case of failure, @secid will be set to zero. + * return it in @blob. */ -void security_task_getsecid_obj(struct task_struct *p, u32 *secid) +void security_task_getlsmblob_obj(struct task_struct *p, struct lsmblob *blob) { - *secid = 0; - call_void_hook(task_getsecid_obj, p, secid); + lsmblob_init(blob); + call_void_hook(task_getlsmblob_obj, p, blob); } -EXPORT_SYMBOL(security_task_getsecid_obj); +EXPORT_SYMBOL(security_task_getlsmblob_obj); /** * security_task_setnice() - Check if setting a task's nice value is allowed diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 1b34b86426e8..af48b8f868b7 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -4161,14 +4161,19 @@ static int selinux_task_getsid(struct task_struct *p) PROCESS__GETSESSION, NULL); } -static void selinux_current_getsecid_subj(u32 *secid) +static void selinux_current_getlsmblob_subj(struct lsmblob *blob) { - *secid = current_sid(); + blob->selinux.secid = current_sid(); + /* scaffolding */ + blob->scaffold.secid = blob->selinux.secid; } -static void selinux_task_getsecid_obj(struct task_struct *p, u32 *secid) +static void selinux_task_getlsmblob_obj(struct task_struct *p, + struct lsmblob *blob) { - *secid = task_sid_obj(p); + blob->selinux.secid = task_sid_obj(p); + /* scaffolding */ + blob->scaffold.secid = blob->selinux.secid; } static int selinux_task_setnice(struct task_struct *p, int nice) @@ -7240,8 +7245,8 @@ static struct security_hook_list selinux_hooks[] __ro_after_init = { LSM_HOOK_INIT(task_setpgid, selinux_task_setpgid), LSM_HOOK_INIT(task_getpgid, selinux_task_getpgid), LSM_HOOK_INIT(task_getsid, selinux_task_getsid), - LSM_HOOK_INIT(current_getsecid_subj, selinux_current_getsecid_subj), - LSM_HOOK_INIT(task_getsecid_obj, selinux_task_getsecid_obj), + LSM_HOOK_INIT(current_getlsmblob_subj, selinux_current_getlsmblob_subj), + LSM_HOOK_INIT(task_getlsmblob_obj, selinux_task_getlsmblob_obj), LSM_HOOK_INIT(task_setnice, selinux_task_setnice), LSM_HOOK_INIT(task_setioprio, selinux_task_setioprio), LSM_HOOK_INIT(task_getioprio, selinux_task_getioprio), diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index 370ca7fb1843..fcacc59faf33 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -2239,30 +2239,35 @@ static int smack_task_getsid(struct task_struct *p) } /** - * smack_current_getsecid_subj - get the subjective secid of the current task - * @secid: where to put the result + * smack_current_getlsmblob_subj - get the subjective secid of the current task + * @blob: where to put the result * * Sets the secid to contain a u32 version of the task's subjective smack label. */ -static void smack_current_getsecid_subj(u32 *secid) +static void smack_current_getlsmblob_subj(struct lsmblob *blob) { struct smack_known *skp = smk_of_current(); - *secid = skp->smk_secid; + blob->smack.skp = skp; + /* scaffolding */ + blob->scaffold.secid = skp->smk_secid; } /** - * smack_task_getsecid_obj - get the objective secid of the task + * smack_task_getlsmblob_obj - get the objective data of the task * @p: the task - * @secid: where to put the result + * @blob: where to put the result * * Sets the secid to contain a u32 version of the task's objective smack label. */ -static void smack_task_getsecid_obj(struct task_struct *p, u32 *secid) +static void smack_task_getlsmblob_obj(struct task_struct *p, + struct lsmblob *blob) { struct smack_known *skp = smk_of_task_struct_obj(p); - *secid = skp->smk_secid; + blob->smack.skp = skp; + /* scaffolding */ + blob->scaffold.secid = skp->smk_secid; } /** @@ -5148,8 +5153,8 @@ static struct security_hook_list smack_hooks[] __ro_after_init = { LSM_HOOK_INIT(task_setpgid, smack_task_setpgid), LSM_HOOK_INIT(task_getpgid, smack_task_getpgid), LSM_HOOK_INIT(task_getsid, smack_task_getsid), - LSM_HOOK_INIT(current_getsecid_subj, smack_current_getsecid_subj), - LSM_HOOK_INIT(task_getsecid_obj, smack_task_getsecid_obj), + LSM_HOOK_INIT(current_getlsmblob_subj, smack_current_getlsmblob_subj), + LSM_HOOK_INIT(task_getlsmblob_obj, smack_task_getlsmblob_obj), LSM_HOOK_INIT(task_setnice, smack_task_setnice), LSM_HOOK_INIT(task_setioprio, smack_task_setioprio), LSM_HOOK_INIT(task_getioprio, smack_task_getioprio),

[v2,07/13] LSM: Use lsmblob in security_current_getsecid

Commit Message

Patch