From patchwork Wed Nov 24 01:43:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Casey Schaufler X-Patchwork-Id: 12635725 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7345CC433F5 for ; Wed, 24 Nov 2021 01:55:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238995AbhKXB7C (ORCPT ); Tue, 23 Nov 2021 20:59:02 -0500 Received: from sonic306-28.consmr.mail.ne1.yahoo.com ([66.163.189.90]:36180 "EHLO sonic306-28.consmr.mail.ne1.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238713AbhKXB67 (ORCPT ); Tue, 23 Nov 2021 20:58:59 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1637718950; bh=7MiUFyCmfkC//4vnaYq/YKc6j4ocqCWB/2RMJPU3nwo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From:Subject:Reply-To; b=hsq3iHIWoxu3jFteNF1W4lpWvr9tmc1iU2bntRgRLcJSJaDWA8+fLt0tHUzvht37ZlPjHBlJUCo6nHjiPHl1gxpRLmK3ANasBQ0tBUM7xBakuZytoDNlmrvzY76Cr/S+EKvkGRyAvegC+E+MIec1YUFk/soYaP9TDmmVSppCy7vThBjiduZMfwrcqVfzp8jXiybHyr9ruGEuDMxfX+kGfBCHkHMtOgxPhasy4bc+TddvDPfoNb4c+4kMAD8T1axBo/kYqCTwu3JJ+ZoyPvlCrTHcgCYcYmpoMwf2M0Dj/yE1d4IUAyxkYu9COZTNtTnWUJi+PZhJyA82SsWwNHkPuA== X-SONIC-DKIM-SIGN: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1637718950; bh=xbeUysdvsbQ7KdjsehGv4BIwjhXQtvkgXbFDYAs9GnJ=; h=X-Sonic-MF:From:To:Subject:Date:From:Subject; b=S/gDAKqftZ+iR+HnqFPnYSj2E7lOruCEMKInEGGxIexX2zHaRNJ7ddIwbJGH9ZvoaBwhJoZlPR/+cYx31QVBj6RbzFaEOAhqzP010cSAnakRCEk6MF7F0g2zy3wwGYJFqBCl7QkfNSjFnNTVYeGfAKKt2jAZqdjqn4vAhs4gifes86DPXZUkw5uRG/QkSgcJEPNqTowVI+eUsl4Z9U4jM8AZJDG5oIaCxirYX8oumnH97N22ZtL+zrA69/x8pRqSG8fyrgKOVSlse+oz1sMLF7SZgOfex7GhsVvRyY0w6sgOz00Q5HfDiwf21q3zoZ3nYH60Ybgbe6cOYnbC5iRDKw== X-YMail-OSG: .NGEq8kVM1m5ea_5_RdkZfniA4gsr5x8kx74xZIAgxiCDKsjrfkfMErTj4fjY9F kE99kkOe1los1G1bHmubDnVXdBVolkcHmXmc3SYTtO1W11ZPSIEbE8uUBAOilmRGvh10DEYEk4Zr 62OHDb6wbze3ouU5cBQ6dwxeEcNSsh.Cv.CsZ_PFxvykto0L3tUO9MILZQRN_wJurEoRfeqm7Xr0 7M3ilEeUt1dzNGmJv7qsTaK.fbsR7q58QK5xLBLuTmcfTnr6ahiWauUK0h7vJJFPjVVOiQLiANA1 Ge..WshoaKw5Q3u1ucjJZ_xkWoEdQcbZBRZkj5_xN38GIM70iuQYgEHVyNBhLIqoI.cihQF8n7Px RTq.lWDGg5MP7MTTQqieDlkrvh7MOI6U14rOzC9L3.HJgLCRNgK8velXPwlxV8ZPMB7pKnXFeI6D l5tcXC7_IYGlQg_zhuhRuYDD3bdJYTJ.M77UXPx2bIIRxYnieallVmlybuEuEklxiR8kev92K8EP WggSuSyKYQyUD9sAcfWx4vvATaHOV6.zb4.yZHeT6OcWY55F55G_4EfBB0S_QgzduRuem6GPR9KE tkFF_NIX1FrazIG0YJPNec2J1UoAdn_49N5WyhPKAkuFxBkHbN.SYeJf7DXCxyowPcId7ZJFmpX3 wa0DMxmr8AbY0VlJIYtR3J7mRqt.QUgwAIxM_TkhWub42ulruJl55u838Rng6_trNvvByFKdu.0r XotuFQVeHQus.N_z26Epz8jEzXbshrfduXQd__.ysr_CjuX.m0HLskdt_2uzxB6PrYNA2PnZMOAT 4GN9oDqLtr42d20Wk_eBwhDLcXI03BEWHajw.M4.8i70bUeYPRVyl.h3iiSgzlqRKNIjUPSuuEHZ 8V.aEGl5YvPVVGATaLNpIFXNbOEWfOrskt.isbm0mFdS2y5Hn5BA2ys6ekF.xQ0O0Hju_Q5v8jkU xyhtvoN_XvUxnEH5AvByRq0eb2IcEhfVaV__elDKY4Okl41eFBRbHcPsoQuUyFK6YLIbPq_HJaZU T9Qk9Acrj_vpKNOVAo9XcDKaTUcszVFHs9vsGH77vXy32ebzduPsxn4Ltv2FN7qgXOT4fRW9DVsm 6IAkIA0XD.saWSddrql59gPGnADHdjNsCW7DHf4z.izhM_ZTbkN0V_tobgZmJRnstHs0XGggKNro ciakCKS0GXcJ27drxX3lA99aAED_vARVJbVY_mvqhoI2Az5stgtJoM4.1dTqikAZWXrYF3E6ta7. C8C4f6l5KRoseT8cUT.aaU3ZzSVkHim3lMmdWv3udzaOKeyccsT2MXg4WOk7HBuTn9Qt_PMnKqA2 UzvHSqZ.h7oQnQli0yhhpZ2ob0sdkZPnKzRMdL8_7bAv5GRhIH0m59b6wm5JC89Oict0nhYhosXM OHmJwngQ3JWM2pQPELZ.LQwM5.5IS82m9oO1AmNfvaFs.i6qozFnGpTDKGUAFgmKBjss3GfwmChx ACDx5NTjA2IsrqAYZbH1CohCTeig05oFuz4T65ee1hvw0nnVJUDqGYfPE1WyX_.QDcAh1byYLw.7 QkxKY94HsO4F2.skmVarntSfZcaL5h6GCPOFEnS_FV.ygqDWLPWa4TSnOb3SRjdrQCjj2pB95X0D oSXdBWcFhXgFBoyj.WjaXGKhGBAuYwiACgx2pEl_XZnI_Li_WlX02zm2sxDdggkusXssaoOtOP_a Y8DdqyFBYVDKSnqnheojHWVkCww4C3fSXL3RKEUJ2Kg5bob3EH9wu21PYpOB0Y5SjuHkFDtv.EpK P6WWrSVxcAdT0DVFuv96cIvxudRrWnxDcA7pWUHWpaFGElDgdpwzilKloWGx09wIkapkCUFDa.Mk 25moOhK1.Jp4TsRUEU.cu8KnE9sQOeMmGa4mWlOMV3fDf2kbjmXqOQnkAw6klF3S9ZNr87aG7ypv vXDebwH5kvl94vuMz_eNZXl5U5KUKkT4.D3158E.zm9GRx_CVG91xnep0Ymxe8pR163njWjr_igE ie.xYTOyq4yHAbSYETDumuUybuV_nqnx3ZD8s78Wc43EB4TfZ63SbNTw.6rb9puWp5EjPUhFTkeO _040hgJRzYsswmtt_C75kZN00JFvriCLAA8Xwrm25CUnJU0G8YKYgebA.piVjA0vnTRJTxsGurwv UY5HWkk_uQANd380sRMBoDqad71Q6QSnrZ2q.5_H37.FEmU2_hrMNLz1g4ew26Q4YMyVMcyV_AT. 94JpEcBDB48bNSOvhlr7OkW4HzaJrTj6eigiBLAxhhq31Q5bCbdA_Z1LFficGBXmrhstjmhrt2zu NQtGDXZedzds4156_lDVVYMba868quF8hREw0k3_ams5j X-Sonic-MF: Received: from sonic.gate.mail.ne1.yahoo.com by sonic306.consmr.mail.ne1.yahoo.com with HTTP; Wed, 24 Nov 2021 01:55:50 +0000 Received: by kubenode511.mail-prod1.omega.ne1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 642dde53d69d58293143a094a618e31b; Wed, 24 Nov 2021 01:55:45 +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 , linux-integrity@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH v30 11/28] LSM: Use lsmblob in security_task_getsecid Date: Tue, 23 Nov 2021 17:43:15 -0800 Message-Id: <20211124014332.36128-12-casey@schaufler-ca.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211124014332.36128-1-casey@schaufler-ca.com> References: <20211124014332.36128-1-casey@schaufler-ca.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org Change the security_task_getsecid_subj() and security_task_getsecid_obj() interfaces to fill in a lsmblob structure instead of a u32 secid in support of LSM stacking. Audit interfaces will need to collect all possible secids for possible reporting. Reviewed-by: Kees Cook Reviewed-by: John Johansen Acked-by: Stephen Smalley Acked-by: Paul Moore Signed-off-by: Casey Schaufler Cc: linux-integrity@vger.kernel.org Cc: linux-audit@redhat.com Cc: netdev@vger.kernel.org --- drivers/android/binder.c | 6 +-- include/linux/security.h | 14 ++++--- kernel/audit.c | 16 +++----- kernel/auditfilter.c | 4 +- kernel/auditsc.c | 25 ++++++------ net/netlabel/netlabel_unlabeled.c | 5 ++- net/netlabel/netlabel_user.h | 6 ++- security/integrity/ima/ima_appraise.c | 12 +++--- security/integrity/ima/ima_main.c | 55 +++++++++++++++------------ security/security.c | 25 +++++++++--- 10 files changed, 96 insertions(+), 72 deletions(-) diff --git a/drivers/android/binder.c b/drivers/android/binder.c index 01cef18f942f..780c7e265f3a 100644 --- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -2718,16 +2718,16 @@ static void binder_transaction(struct binder_proc *proc, t->priority = task_nice(current); if (target_node && target_node->txn_security_ctx) { - u32 secid; struct lsmblob blob; size_t added_size; + u32 secid; security_cred_getsecid(proc->cred, &secid); /* - * Later in this patch set security_task_getsecid() will + * Later in this patch set security_cred_getsecid() will * provide a lsmblob instead of a secid. lsmblob_init * is used to ensure that all the secids in the lsmblob - * get the value returned from security_task_getsecid(), + * get the value returned from security_cred_getsecid(), * which means that the one expected by * security_secid_to_secctx() will be set. */ diff --git a/include/linux/security.h b/include/linux/security.h index 42c99237786b..efd6e88d57b1 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -503,8 +503,8 @@ int security_task_fix_setgid(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_task_getsecid_subj(struct task_struct *p, u32 *secid); -void security_task_getsecid_obj(struct task_struct *p, u32 *secid); +void security_task_getsecid_subj(struct task_struct *p, struct lsmblob *blob); +void security_task_getsecid_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); @@ -1206,14 +1206,16 @@ static inline int security_task_getsid(struct task_struct *p) return 0; } -static inline void security_task_getsecid_subj(struct task_struct *p, u32 *secid) +static inline void security_task_getsecid_subj(struct task_struct *p, + struct lsmblob *blob) { - *secid = 0; + lsmblob_init(blob, 0); } -static inline void security_task_getsecid_obj(struct task_struct *p, u32 *secid) +static inline void security_task_getsecid_obj(struct task_struct *p, + struct lsmblob *blob) { - *secid = 0; + lsmblob_init(blob, 0); } static inline int security_task_setnice(struct task_struct *p, int nice) diff --git a/kernel/audit.c b/kernel/audit.c index 22286163e93e..d92c7b894183 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -2139,19 +2139,12 @@ int audit_log_task_context(struct audit_buffer *ab) char *ctx = NULL; unsigned len; int error; - u32 sid; struct lsmblob blob; - security_task_getsecid_subj(current, &sid); - if (!sid) + security_task_getsecid_subj(current, &blob); + if (!lsmblob_is_set(&blob)) return 0; - /* - * lsmblob_init sets all values in the lsmblob to sid. - * This is temporary until security_task_getsecid is converted - * to use a lsmblob, which happens later in this patch set. - */ - lsmblob_init(&blob, sid); error = security_secid_to_secctx(&blob, &ctx, &len); if (error) { if (error != -EINVAL) @@ -2359,6 +2352,7 @@ int audit_set_loginuid(kuid_t loginuid) int audit_signal_info(int sig, struct task_struct *t) { kuid_t uid = current_uid(), auid; + struct lsmblob blob; if (auditd_test_task(t) && (sig == SIGTERM || sig == SIGHUP || @@ -2369,7 +2363,9 @@ int audit_signal_info(int sig, struct task_struct *t) audit_sig_uid = auid; else audit_sig_uid = uid; - security_task_getsecid_subj(current, &audit_sig_sid); + security_task_getsecid_subj(current, &blob); + /* scaffolding until audit_sig_sid is converted */ + audit_sig_sid = blob.secid[0]; } return audit_signal_info_syscall(t); diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c index ffbd8396bdc9..de165c2cd55f 100644 --- a/kernel/auditfilter.c +++ b/kernel/auditfilter.c @@ -1340,7 +1340,6 @@ int audit_filter(int msgtype, unsigned int listtype) struct audit_field *f = &e->rule.fields[i]; struct lsmblob blob; pid_t pid; - u32 sid; switch (f->type) { case AUDIT_PID: @@ -1371,8 +1370,7 @@ int audit_filter(int msgtype, unsigned int listtype) case AUDIT_SUBJ_CLR: if (f->lsm_isset) { security_task_getsecid_subj(current, - &sid); - lsmblob_init(&blob, sid); + &blob); result = security_audit_rule_match( &blob, f->type, f->op, &f->lsm_rules); diff --git a/kernel/auditsc.c b/kernel/auditsc.c index bba31349ae3e..7cd70a43408f 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -467,7 +467,6 @@ 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; @@ -667,17 +666,9 @@ static int audit_filter_rules(struct task_struct *tsk, logged upon error */ if (f->lsm_isset) { if (need_sid) { - security_task_getsecid_subj(tsk, &sid); + security_task_getsecid_subj(tsk, &blob); need_sid = 0; } - /* - * lsmblob_init sets all values in the lsmblob - * to sid. This is temporary until - * security_task_getsecid() is converted to - * provide a lsmblob, which happens later in - * this patch set. - */ - lsmblob_init(&blob, sid); result = security_audit_rule_match(&blob, f->type, f->op, &f->lsm_rules); @@ -2703,12 +2694,15 @@ 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_getsecid_obj(t, &blob); + /* scaffolding - until target_sid is converted */ + context->target_sid = blob.secid[0]; memcpy(context->target_comm, t->comm, TASK_COMM_LEN); } @@ -2724,6 +2718,7 @@ 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; @@ -2735,7 +2730,9 @@ 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_getsecid_obj(t, &blob); + /* scaffolding until target_sid is converted */ + ctx->target_sid = blob.secid[0]; memcpy(ctx->target_comm, t->comm, TASK_COMM_LEN); return 0; } @@ -2756,7 +2753,9 @@ 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_getsecid_obj(t, &blob); + /* scaffolding until target_sid is converted */ + axp->target_sid[axp->pid_count] = blob.secid[0]; 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 51cb4fce5edf..15b53fc4e83f 100644 --- a/net/netlabel/netlabel_unlabeled.c +++ b/net/netlabel/netlabel_unlabeled.c @@ -1562,11 +1562,14 @@ 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_task_getsecid_subj(current, &audit_info.secid); + security_task_getsecid_subj(current, &blob); + /* scaffolding until audit_info.secid is converted */ + audit_info.secid = blob.secid[0]; 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 6190cbf94bf0..aa31f7bf79ee 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_task_getsecid_subj(current, &audit_info->secid); + struct lsmblob blob; + + security_task_getsecid_subj(current, &blob); + /* scaffolding until secid is converted */ + audit_info->secid = blob.secid[0]; audit_info->loginuid = audit_get_loginuid(current); audit_info->sessionid = audit_get_sessionid(current); } diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c index dbba51583e7c..2fedda131a39 100644 --- a/security/integrity/ima/ima_appraise.c +++ b/security/integrity/ima/ima_appraise.c @@ -71,15 +71,17 @@ bool is_ima_appraise_enabled(void) int ima_must_appraise(struct user_namespace *mnt_userns, struct inode *inode, int mask, enum ima_hooks func) { - u32 secid; + struct lsmblob blob; if (!ima_appraise) return 0; - security_task_getsecid_subj(current, &secid); - return ima_match_policy(mnt_userns, inode, current_cred(), secid, - func, mask, IMA_APPRAISE | IMA_HASH, NULL, - NULL, NULL, NULL); + security_task_getsecid_subj(current, &blob); + /* scaffolding the .secid[0] */ + return ima_match_policy(mnt_userns, inode, current_cred(), + blob.secid[0], func, mask, + IMA_APPRAISE | IMA_HASH, NULL, NULL, NULL, + NULL); } static int ima_fix_xattr(struct dentry *dentry, diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c index 465865412100..c327f93d3962 100644 --- a/security/integrity/ima/ima_main.c +++ b/security/integrity/ima/ima_main.c @@ -405,12 +405,13 @@ static int process_measurement(struct file *file, const struct cred *cred, */ int ima_file_mmap(struct file *file, unsigned long prot) { - u32 secid; + struct lsmblob blob; if (file && (prot & PROT_EXEC)) { - security_task_getsecid_subj(current, &secid); - return process_measurement(file, current_cred(), secid, NULL, - 0, MAY_EXEC, MMAP_CHECK); + security_task_getsecid_subj(current, &blob); + /* scaffolding - until process_measurement changes */ + return process_measurement(file, current_cred(), blob.secid[0], + NULL, 0, MAY_EXEC, MMAP_CHECK); } return 0; @@ -436,9 +437,9 @@ int ima_file_mprotect(struct vm_area_struct *vma, unsigned long prot) 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? */ @@ -446,11 +447,11 @@ int ima_file_mprotect(struct vm_area_struct *vma, unsigned long prot) !(prot & PROT_EXEC) || (vma->vm_flags & VM_EXEC)) return 0; - security_task_getsecid_subj(current, &secid); + security_task_getsecid_subj(current, &blob); inode = file_inode(vma->vm_file); action = ima_get_action(file_mnt_user_ns(vma->vm_file), inode, - current_cred(), secid, MAY_EXEC, MMAP_CHECK, - &pcr, &template, NULL, NULL); + current_cred(), blob.secid[0], MAY_EXEC, + MMAP_CHECK, &pcr, &template, NULL, NULL); /* Is the mmap'ed file in policy? */ if (!(action & (IMA_MEASURE | IMA_APPRAISE_SUBMASK))) @@ -486,10 +487,12 @@ int ima_bprm_check(struct linux_binprm *bprm) { int ret; u32 secid; + struct lsmblob blob; - security_task_getsecid_subj(current, &secid); - ret = process_measurement(bprm->file, current_cred(), secid, NULL, 0, - MAY_EXEC, BPRM_CHECK); + security_task_getsecid_subj(current, &blob); + /* scaffolding until process_measurement changes */ + ret = process_measurement(bprm->file, current_cred(), blob.secid[0], + NULL, 0, MAY_EXEC, BPRM_CHECK); if (ret) return ret; @@ -510,10 +513,11 @@ int ima_bprm_check(struct linux_binprm *bprm) */ int ima_file_check(struct file *file, int mask) { - u32 secid; + struct lsmblob blob; - security_task_getsecid_subj(current, &secid); - return process_measurement(file, current_cred(), secid, NULL, 0, + security_task_getsecid_subj(current, &blob); + /* scaffolding until process_measurement changes */ + return process_measurement(file, current_cred(), blob.secid[0], NULL, 0, mask & (MAY_READ | MAY_WRITE | MAY_EXEC | MAY_APPEND), FILE_CHECK); } @@ -689,7 +693,7 @@ 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 @@ -709,8 +713,9 @@ 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_task_getsecid_subj(current, &secid); - return process_measurement(file, current_cred(), secid, NULL, + security_task_getsecid_subj(current, &blob); + /* scaffolding - until process_measurement changes */ + return process_measurement(file, current_cred(), blob.secid[0], NULL, 0, MAY_READ, func); } @@ -739,7 +744,7 @@ int ima_post_read_file(struct file *file, void *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) @@ -752,9 +757,10 @@ int ima_post_read_file(struct file *file, void *buf, loff_t size, } func = read_idmap[read_id] ?: FILE_CHECK; - security_task_getsecid_subj(current, &secid); - return process_measurement(file, current_cred(), secid, buf, size, - MAY_READ, func); + security_task_getsecid_subj(current, &blob); + /* scaffolding until process_measurement changes */ + return process_measurement(file, current_cred(), blob.secid[0], buf, + size, MAY_READ, func); } /** @@ -882,7 +888,7 @@ int process_buffer_measurement(struct user_namespace *mnt_userns, 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; @@ -905,9 +911,10 @@ int process_buffer_measurement(struct user_namespace *mnt_userns, * buffer measurements. */ if (func) { - security_task_getsecid_subj(current, &secid); + security_task_getsecid_subj(current, &blob); + /* scaffolding */ action = ima_get_action(mnt_userns, inode, current_cred(), - secid, 0, func, &pcr, &template, + blob.secid[0], 0, func, &pcr, &template, func_data, NULL); if (!(action & IMA_MEASURE) && !digest) return -ENOENT; diff --git a/security/security.c b/security/security.c index 2e74e5e88d64..1b9f33097216 100644 --- a/security/security.c +++ b/security/security.c @@ -1906,17 +1906,30 @@ int security_task_getsid(struct task_struct *p) return call_int_hook(task_getsid, 0, p); } -void security_task_getsecid_subj(struct task_struct *p, u32 *secid) +void security_task_getsecid_subj(struct task_struct *p, struct lsmblob *blob) { - *secid = 0; - call_void_hook(task_getsecid_subj, p, secid); + struct security_hook_list *hp; + + lsmblob_init(blob, 0); + hlist_for_each_entry(hp, &security_hook_heads.task_getsecid_subj, + list) { + if (WARN_ON(hp->lsmid->slot < 0 || hp->lsmid->slot >= lsm_slot)) + continue; + hp->hook.task_getsecid_subj(p, &blob->secid[hp->lsmid->slot]); + } } EXPORT_SYMBOL(security_task_getsecid_subj); -void security_task_getsecid_obj(struct task_struct *p, u32 *secid) +void security_task_getsecid_obj(struct task_struct *p, struct lsmblob *blob) { - *secid = 0; - call_void_hook(task_getsecid_obj, p, secid); + struct security_hook_list *hp; + + lsmblob_init(blob, 0); + hlist_for_each_entry(hp, &security_hook_heads.task_getsecid_obj, list) { + if (WARN_ON(hp->lsmid->slot < 0 || hp->lsmid->slot >= lsm_slot)) + continue; + hp->hook.task_getsecid_obj(p, &blob->secid[hp->lsmid->slot]); + } } EXPORT_SYMBOL(security_task_getsecid_obj);