From patchwork Fri Jun 11 00:04:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Casey Schaufler X-Patchwork-Id: 12314367 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AC86EC48BE5 for ; Fri, 11 Jun 2021 00:15:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8AD2F613E3 for ; Fri, 11 Jun 2021 00:15:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231315AbhFKARs (ORCPT ); Thu, 10 Jun 2021 20:17:48 -0400 Received: from sonic312-31.consmr.mail.ne1.yahoo.com ([66.163.191.212]:41097 "EHLO sonic312-31.consmr.mail.ne1.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230493AbhFKARq (ORCPT ); Thu, 10 Jun 2021 20:17:46 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1623370549; bh=OlF33fqb8tWOkrdqEYXm4D3xeEZaVbk1tN/L/KHioSg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From:Subject:Reply-To; b=AHjxJXYesLB/eqt+2oghZQvxJjdFVdEUHu3ddzx9HkxnF625W4//1Lc0xK8/RgM4uBTlPO5jWLU2H1UMbJSd/ZZCbhAvI0/g1HapWjbpdETL9FXFSSQFpnPS0GN3iLlfvxFQCKpkKJM6s19onZEZ7UBN8DqH1MCl+bbkWAzTompUM6Aj4ULq6uibnF4fja6UCPwlSMwcIbRoaMHCMEdH9bKMaSKBmCNTIyRGlq/FbevPtFm9NRGZYGVbMC7CM1snJ+39TIKdVp5RddepVwquGUWvQUnR84y4vXMfnGejvmRJ252akwkwPIrZ+wVZNE6JhMaJWcB1bBLjaLmMEEV8zQ== X-SONIC-DKIM-SIGN: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1623370549; bh=rehM2rihCIFrsmcxyXH20xNTaNKRhbGfU/oem+hEQHJ=; h=X-Sonic-MF:From:To:Subject:Date:From:Subject; b=JvhbXEnHgvgfctLLfYix3mHYsH2H1YNn2pJqArC7xQLrRJiHM9DJdnBlWfWEN3r4U7ITkejEL7ueYlZ9OWy6iuBdgfZVLYofj9KTs0pkpvZzTszYu4UN4Fu4ewTbvcFf9YfHhY/IPYez46aBlSeCpqTW7FCkrvmMCtH1H+bSh30QiJk2oZZJN+POW5glyrqLydpbqKtQX64lcD19yfslizRr3mgdevyFZzKZIvoBGOyi60U5K9cNs6GH8OZrUkADblXnvwECt88RLSdE0YV2uUzLPdF8CmqfKBF7pu7CkXzwdUsqECTMFxYWZvIC8FH2dttMyQfELnQXAO1d3bJ8Eg== X-YMail-OSG: .lCHzwcVM1mJYvtP1wfVqQggwoHi6cnwMsj1Jj5Fgs7.5.JG9tBJRDNMQzoWRyM ayt1UmWKeBHO47K3Ro5H45.MEDZnbTvAfZfwG2GVqEnl4YENLBDhksRhr9H_HBrVw3fKVefDhGVo x9GdtvoJ2O97rlYTxz2_THRWLOFy9N50W_cue987cBhMD04BAvTIzsT5QGn0.I0REXbc1P7FZppB Dkhf9FR2Ay.5.w.c8T_0MIuvYANm8gl6grAJynne6Xi1ZvUD.kROgfsJNbmxxDlNceeRTcfgH2u9 vsMJ8HmYs6Cf96PWwaNkbDxj1rZs2s.7c24ctN52Unc8NMZ5b_dg3irLy20tokH.Jfqh8mT5kNeE nB0k7LI_yRcboKDgO63R6fxroxjYsP5Gmqar3f3.0F02oZuW9bV61Qnht8XgbovKrlZjqQ_CI4vt 6j5oLOjSd_EPQrdBuVanEWLoGs9V1_JabA5h4QdPLOip176Z.nalf4XBDDxLcALXsh32qcA39JOu SrS6W0AXlSVDMSZBc6cNCoTz08dMVD4YbSYoKNPH8Kg8NI5oQZy4ehMw7sR3DYQORC9.A0jNJJ2b mx7NOWOoPQBxBHp9lxco063TKTL3.OkvHvC0irquDluwe6kpX7j7V1NDxkuLlzSE87CPp9U17GxQ JPqbu7NPUYDjyvYFZfpN8ptv2ExSeEGTjjKrkvP6bmJybLCDXy483FhDzO9Ckom3KAcPfKEmCbIm gM1pF_Rs9l.GHKxLWibi3csm.32dEH6ffLEvmlvueYzG3WQMHOGOFM9y6GYJcnibfwM84tD8tfRR vpUBn8GaU71GuzHW0Vt0IrL8ZwlhJzTzqa.h_JD5uOXONvYCBDEd8C1S3mDP_gCdOEINz6xdEZn6 kWxJTfuFL9OJZ92gWGU96_mFTsEDzTuXkYeRpMb7KLaAGC8IaTjuWFS9OxlmpfcxhqjA.U7IEKTW Et0mR1IqEsKVOYZpstvfNzMXcGWSvc.WxdcNsARwczM4rk_Vl3.kbhJwHvTZ0ROtIjni84JbwNHx RPb9Or93e.3rCalKmrFIyiMQvjkfK_m9ag2NAQIT.ylMXT1nPJpYU5v5vgS01Hdk6CS8JNrckUmV fVu3A23T6pPcAnBqWQdZCCys81ympLESxFw0DycOW24NmbE2jS3k1zNBOr5a5Kr7V.rb7nzEJqc4 y424Gtjm2Ziu6vUalcIvTBhnTsi7wlinT8JARoKR.Dv.arXeK0vHkO7jxDBdjWfi7EwkVxt3dAx9 .GLCdMeLWMBsqr.z6Hn5RmDYOmyxCyiccKHVmDpC4RXzT6WXQR0pHA3CjMnsu2yf1eG8V_Fjxy31 HBHI0jYOwYiGZzLNYyxb7j78meDkta0dhR0DIzQ0nzbPZ3vwvxwhZOsAyZ3v_agqywOteCwFlVfk 1HEoYsjsuXbLog6FM0bOR0IpPvfGuMjziUgSsA16Zh9ch5YtHkn2S_3jphBZN3WtDc1IzbjzGCHo YFJaz75CSUkBEBJm_e2ULisl2yqYBo79aUWJKDBl.IrQRT7V9pLicgGM6ghk3kOv3NlwFfYDMq2U GO9oZY8AA57xYMhypcWAvKCRiw2SSQe_CDKsVGeoSC4EvY4bBlFUkq3Tfyd6Y824pPPX9kPgDjgj eyjWzD2Moto8bhbnQ1nmlm3JY5UgmbfqKc3e_zOEEVRb.mM2JXhglF8FEAisEb3th3ves8sDljSu 7n8HzUWoJyMG3Iib1Pf37BMQ_Vprrt76gFFBxKSEfmt8.JnplEHgyc.lObxeLSxxKPyr5Nk60bhJ wlO1PNZ3aipiqcemyBvqu8wVqt57T6fByZV0VAktkGfFqKamIqT5HUbqnFrLMz6C65cnJ1grP3bP xJGg_YF5sG5L52p9GiEpyZm9iRhDzdQlN4dOGrm3SQofgVsd2weYZf2kE.CSUO_VWuouBrkc3bwM mysfNFwsIZXyYjbQZ4SWbRmdKYJ9BvrxTMCIEw_TarlyNlX3.U5M1HOk4PR30QlNrz1aWEzwZVOu AnFqCniwGJvh7FibB97jsrJNX5e2Fae4oDnngM2gGYp1k6y65xgjo5qHVUm.CRO9QaEpLjhE9udd LnGhCbrUzqNsMBItlbWAAild201NlAO1T1Jk5.iFWTbw46clOHO9Q01MiVfGbZ2yYxkUkmWuPtNO TjQo5sXZzhpyXRF2D517Hsa_cEloJ3g.WU8mvTuLtLiHjPTONdIjwcrXObiykuJCQW90i46s14X9 HTI4pbKQIirHeNLC.aeaVkhKmKDplN03X2skuysbY7a5AZQaw05.Yf_mBPyiCwd1L5Vsz1MmWGcS _4.ClYNPlgzfcbOXxNyoMGzyNwtTDp2UGxhtkWHMcW7tymzbCC5DqGMjZVvzzAqwtr6QPNW4r8a4 spTnc.rfvG8sCQnRU63N_vfxxGOWDgBf4LjvsYo2LXg5odJ7QZjgSc6axy1XwUsN.5yBl7XvBZ55 rxKAp_l1spXis95IKuIi.WT.InLxN6E20Kwo04VUede8pIHBQwv.jp1M0yJnQIOR2i7wHhdigNLb RCo0.djQqLugqCPpm8tojpe.MNyXixv2l.kmn87lQPRaYIcmPon2t4fuantFkvzEmvMFR.dv8TqQ XrtByzPISVGs2QI8.FVExGlPV8sZ.R4v7TH543_UYg5Rq0TmZTadLwuwO9nykbu6y5g2U1I4IKcE O8UX8CKMc86re6un27sV_OG4TQCFAAo7tnmFKThZDviFhcMlnihj3O7Mmg369ML4UWXsV0SCVvdV OeWR6S1KJqrZyX9HKuENoDtWQnqOPU_bPXJlzCL41cptOTuoDvXdI5AwIk13WE_BqfwEVF3vx_oC J5dXaPIw2nA60C8YXT7.4FvvO8CO.mNBYh_cNoSqVBDiE4cxxIWGfuR_1RH3xdfYGfJuYJv922Jj OXXxdPUBlkbA9XWckKa77M15_A862pOoz6FT5qCwZKTV73w26GfRwld_3o5JV1BAmK1IQlxFqswY nrWT39bycYWAXUn5VU6jBsHJ7ZmtE_LUQ0O2ej_s6xQPiNMwCqZPJ5JneoQUFdGDY.7lHiqVP00W 7nAkWceuHKIZNgE616Xf71Rswf84FwaoSwlUokMdH6FtlJCjBdZXbJGm1RtjsFwo_HHTsa_brUf8 VFLmDX5ad_coj2YROeprQtd_Ih3K3e196TTMN6oPzXmaB5zxTzk62RBKVh9ha7pQbA9fufEvYow. AgJUMcmLoPI6SeZFL.J1JEPakp1LRmygwCPOvW6dXYagvgfRQADmsJn7z7b0S8Xmp8cBZIj.6TdL bOw8iz9hjYm1bympXXqU8_T8g7hvS4XQ_VA8- X-Sonic-MF: Received: from sonic.gate.mail.ne1.yahoo.com by sonic312.consmr.mail.ne1.yahoo.com with HTTP; Fri, 11 Jun 2021 00:15:49 +0000 Received: by kubenode557.mail-prod1.omega.gq1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 264b86f3300bf3b01d750e08400c1764; Fri, 11 Jun 2021 00:15:47 +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, linux-integrity@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH v27 10/25] LSM: Use lsmblob in security_task_getsecid Date: Thu, 10 Jun 2021 17:04:20 -0700 Message-Id: <20210611000435.36398-11-casey@schaufler-ca.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210611000435.36398-1-casey@schaufler-ca.com> References: <20210611000435.36398-1-casey@schaufler-ca.com> MIME-Version: 1.0 Precedence: bulk List-ID: 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 | 12 +----- 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 | 10 +++-- security/integrity/ima/ima_main.c | 56 +++++++++++++++------------ security/security.c | 25 +++++++++--- 10 files changed, 94 insertions(+), 79 deletions(-) diff --git a/drivers/android/binder.c b/drivers/android/binder.c index 193397a1fece..ab55358f868b 100644 --- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -2710,7 +2710,6 @@ 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; @@ -2723,16 +2722,7 @@ static void binder_transaction(struct binder_proc *proc, * here; however, it isn't clear that binder would handle that * case well anyway. */ - security_task_getsecid_obj(proc->tsk, &secid); - /* - * Later in this patch set security_task_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(), - * which means that the one expected by - * security_secid_to_secctx() will be set. - */ - lsmblob_init(&blob, secid); + security_task_getsecid_obj(proc->tsk, &blob); ret = security_secid_to_secctx(&blob, &secctx, &secctx_sz); if (ret) { return_error = BR_FAILED_REPLY; diff --git a/include/linux/security.h b/include/linux/security.h index bdac0a124052..60f4515b9181 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -500,8 +500,8 @@ 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); @@ -1197,14 +1197,16 @@ 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 6a04d762d272..1ba14a7a38f7 100644 --- a/kernel/auditfilter.c +++ b/kernel/auditfilter.c @@ -1330,7 +1330,6 @@ int audit_filter(int msgtype, unsigned int listtype) for (i = 0; i < e->rule.field_count; i++) { struct audit_field *f = &e->rule.fields[i]; pid_t pid; - u32 sid; struct lsmblob blob; switch (f->type) { @@ -1362,8 +1361,7 @@ 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 9aeddf881e67..dd902b68433e 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -471,7 +471,6 @@ 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; @@ -668,17 +667,9 @@ 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); @@ -2422,12 +2413,15 @@ 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); } @@ -2443,6 +2437,7 @@ 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; @@ -2454,7 +2449,9 @@ 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; } @@ -2475,7 +2472,9 @@ 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 534dee9c7b6f..b08442582874 100644 --- a/net/netlabel/netlabel_unlabeled.c +++ b/net/netlabel/netlabel_unlabeled.c @@ -1564,11 +1564,14 @@ 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 b9ba8112b3c5..11f6da93f31b 100644 --- a/net/netlabel/netlabel_user.h +++ b/net/netlabel/netlabel_user.h @@ -34,7 +34,11 @@ static inline void netlbl_netlink_auditinfo(struct sk_buff *skb, 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 4e5eb0236278..f8c7b593175f 100644 --- a/security/integrity/ima/ima_appraise.c +++ b/security/integrity/ima/ima_appraise.c @@ -71,14 +71,16 @@ 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); + 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); } 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 906c1d8e0b71..9d1ed00eb349 100644 --- a/security/integrity/ima/ima_main.c +++ b/security/integrity/ima/ima_main.c @@ -388,12 +388,13 @@ 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; @@ -419,9 +420,9 @@ 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? */ @@ -429,11 +430,12 @@ 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); + /* scaffolding */ action = ima_get_action(file_mnt_user_ns(vma->vm_file), inode, - current_cred(), secid, MAY_EXEC, MMAP_CHECK, - &pcr, &template, 0); + current_cred(), blob.secid[0], MAY_EXEC, + MMAP_CHECK, &pcr, &template, 0); /* Is the mmap'ed file in policy? */ if (!(action & (IMA_MEASURE | IMA_APPRAISE_SUBMASK))) @@ -469,10 +471,12 @@ 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; @@ -493,10 +497,11 @@ 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); } @@ -672,7 +677,7 @@ 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 @@ -692,8 +697,9 @@ 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); } @@ -722,7 +728,7 @@ 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) @@ -735,9 +741,10 @@ 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); } /** @@ -859,7 +866,7 @@ void 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 (!ima_policy_flag) return; @@ -879,9 +886,10 @@ void 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); if (!(action & IMA_MEASURE)) return; diff --git a/security/security.c b/security/security.c index 7f722ac04d99..ce22903ccce2 100644 --- a/security/security.c +++ b/security/security.c @@ -1904,17 +1904,30 @@ 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);