From patchwork Thu Apr 7 21:22:12 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Casey Schaufler X-Patchwork-Id: 12805754 X-Patchwork-Delegate: kuba@kernel.org 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 B6796C433EF for ; Thu, 7 Apr 2022 21:28:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231519AbiDGVaJ (ORCPT ); Thu, 7 Apr 2022 17:30:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44416 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231479AbiDGV36 (ORCPT ); Thu, 7 Apr 2022 17:29:58 -0400 Received: from sonic313-15.consmr.mail.ne1.yahoo.com (sonic313-15.consmr.mail.ne1.yahoo.com [66.163.185.38]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C874F1A3AC3 for ; Thu, 7 Apr 2022 14:27:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1649366864; bh=tqvz12saZEJBvLj3JqZS/kWuQOAhpDE8Slwx2TBUp2U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From:Subject:Reply-To; b=SOvLO4T3OISVSBqMCrcDBVA8Q5Zp/V4FBfwSidAbolsbkDk8hfv+3I/1xHh3Q/ySEB2BQdekdEMel/WiErooVj5jzwQ28Y7tQGiph6C2UmOVKevB6+bfYofysfYT7ecNobCwssPMSzFPXhkMAX3GPHCFxwyfYOG8zBbHlWzVp5MqJSsC+PgH2y5VwqCwHa/JkiWvGUwjXveMjecpxufsk+WFa3nuvltpZe5qSUY7Y6+pVf/ZkaFscdMf312tKmhMbwGEqs3uURHVvt4jCmLR2pjVzJmKYY3Yp8X2W2N1hPygULhw2J7HRWzr7vUaud663LPZMJ0nvj6s6YBVRpCmRA== X-SONIC-DKIM-SIGN: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1649366864; bh=AAWOlDwGs5LPBd0XpVRpUN17fXHim6VffyuVxTHOQFd=; h=X-Sonic-MF:From:To:Subject:Date:From:Subject; b=Wd+tED0N4TpuIau0NBdt0+0d1geztDXG+mxxmeG7oPuGDdwAn9oaZFSrDAr2sMVKcukasmFEBVCPrNTnv/mJsa3+EU4Zm+F42VeBuryjTURKYVxH3DUJ55TvHwRysrun1wVEm1ZZX69SXOxFAa7jfrF5tH8JUpOhkjZhvoNQ2HrjkxhRT9QH7kOloKOUhMSZOccICBHk8Xsdhh+aLqDIdmPxmsUcH49eI3VmraaBj8lEZ0aGnxpLYBu6F33ONeY0VyhDlUjPHQS9WbtXyYUuLUEQSKafVaNmiajP27ZfHH2SjDuCyGpRpzu1nBhM9pLpW7oEZqfQLsfyv0PrXflJPQ== X-YMail-OSG: kXj8Lj4VM1k2a7qv_Ga7KkLxG.PfhibZu4gSfcBtZnDDHFOh1.M0P4j_E5nGnvK Rk2wn8N6DMuB55zS8ddfYooFq_8fU4iSfHWg3usQq534fiEzAFm7s_1RF17cRj_StVd7IP52U2J5 HEZiqJMTEhyxJs2dcm5Ja_cdylAv4gaEd6i6xErtjx1dtXS.WkmkO7OpC7EG93ebVlv8yiUKaHvr eFPXXIonHAibECS6bzYhjGZ5Z9gd_7P5nP11_.OBODH3Ki0YBz.9Tj78GuEtHKKQ65jSC0U3bsAY FRGL92vJCoBnUNG1iEL5kfyALuHuZXbEpbJ0rkvwVm6Z4NSCTBPnR1viSBuBgPRzgFt77_lkZr36 mtWvyFlCV0bhRvPhIBgYC2W_7HmL_q7Y8EuAtQ4V6y3fqx6VHrjscbgtP1JmcORlGunaySqVlAI2 3_xQm5ZbJE1Vf_oRIxOOLMqA2FRiD8kXvMD5p7s8w0LDyYFdZ.7B9Kq0R_Kd0hqi_gtcQfZGIwK0 oNnaz7xYgoekUC_WPh0.HJqPLSp1RXZIFgYIVvoFFm3NH5WnjdYRoNQYbqwdLL3qZo9.thGrlasQ 4UV9M86oJrgQDR.sSdETbQf01G4YghAICvmYHp14RxfpaUqnlhL8uWU3ZNaYzDqFMsTCxtCFFuxM PUCJMyRPkpwgV.hN5744pvD9aWbZe3N0dSjFVtF_iYY2vtN_1DxcH47WhlzJ6R6XkopiRC24F01q SVxziBFYnjXFLcjW.Tc.QsNC3fLGTMo6pD6qJqhR93XEqUQ4AIzYEZ401Ld9pTwNgRzDrWpHxt3s NgWmEB1M_PLgEu_21LAGlIB0S7by0I4pp6LVkZnXuoc8MmC96hI6wzkf12N3.yjGrHuxyKiV7faU LAoKgJcRMfvsYg2PG.Wg67WnjG6NtyU1.4FJF8CCL33ZWZELJYyPM6_U4ziwIHMZvr9h6HCeo6Eh pQTn9tpC0i5D9xNpODxq0daYoHMQVTo7fUuR73fbfrtSWm1nrvkD5TIlnz9Ip5.QXDs8GhAa6uQB hT9.5rhMapdQdzwD2PzsOC3euLAKvM.2MeT8CzPMplMty3UVmQvMFvMIC.fZ41eub9cXng_enYmJ t4iyk0y0X3uJLVBxBoUxZqWqIrxXDmrx.cV1kADKNGHsFnzujB7AuXXJ7jHArUQ7uInbvZygy0Ve hz7FO3TXWfgnX2vZSVE3ClbPEk273HDGCj8zTwJTP3DipkQYtJz5Cfl34rNXl9HXzajd.O1CYWM8 orDrNypK0m5JasSYM3kMWUKyE24t..hpSfL9sx7Hh.175_TpLkOIwj9RyY39EcKex6._ozrExgBB hAGTLP9.rsJv4WEaQDDv0pb20U8KYtFsHPNZigrtl9et9DqawJNVdcRd9fJ487IqJIqu2s3aRCti oUTnUH.cgUbmSbVjg.Y.jwgWYbvtxozQImOvAqSk5liYt8B5Y.x93HFzyO35z11SeGLfs_qLnONi fPBEdwvJZFTymun3TGOONO2N7kdom2MBOiCQLGojeuyvfr8UIxWc1JK_6JZugYqC6.FYu5_83qFv I6VbZhDf8tiZKRaUPSPZe17KyPjnA1B6o_SQpPNqONdT6VZnp.Npjt25OQ74nrhmtZEpCQ6H.3ZW a_XBa0sDlV5qykkIc8snhZBHusqvQsWBqobOej1FnQTSXA4yqHJ3KISNPjiX9iH2mE.owBhVDmmU yRE0nkhslCRdH3Lr8vzU3EQhuPS17YZ9qf5iqg.9C1UAJblm5WK7v9Umg5Jp_.hQfFT3dmS50O6z d6twxrtfecjaD0scjojxwh5PbifHQZboGrZTG5mQmFI.48nU4ePOyk0UgzTwZOWfmLPSXDulkeK8 2EoezDosTHMH5zR3_o_pvO9FWB.26ZdCqQJDpyjg9vRYTFO2zF7FZdFF1foUh0DoNqxdDL.xRgD7 v5d.mHFIDroIrZb0XXm.lUyu0oUZWqG10ZnQ9_hHBm37_BQFX.fo_Lv9Qxm1_d_aGspUV0ciGCuT hBqVBaFVWzDsR0ZM9j_N_8UOhtdwj3v2phnwv9T.eYJNfv4k6HfgkK23pM8.ksxHVL22TGHtOPp4 GP5i47J3Y4UKkllGmbLgzZbRwzcuMxhq.9yZgws8xZ5b.mo3h033ksnaR.B0ktY8wJN8.BiZ2WQG R0SURPvjMCx0wICq.kHlm1jB.0mKpRE8Nnm09EYR2xawTSejFwLolOF1nn3rCcaY7UYiFzW5A2eU aTqKNp18i23LkXazYlpVVktovujD8XcpzJ1byKmyhJanyK9XDgWxHjaeSf49q4haqMA9Eunogji0 5P6pDdyamVgcAdjCC5Xw3Ic93mivIoMh1tjDBsyl_vmXNScvxlBNauaOM4Q-- X-Sonic-MF: Received: from sonic.gate.mail.ne1.yahoo.com by sonic313.consmr.mail.ne1.yahoo.com with HTTP; Thu, 7 Apr 2022 21:27:44 +0000 Received: by kubenode522.mail-prod1.omega.ne1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID cdeff4c1363a36af98b9100857bab95c; Thu, 07 Apr 2022 21:27:42 +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, stephen.smalley.work@gmail.com, linux-kernel@vger.kernel.org, linux-integrity@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH v34 11/29] LSM: Use lsmblob in security_current_getsecid Date: Thu, 7 Apr 2022 14:22:12 -0700 Message-Id: <20220407212230.12893-12-casey@schaufler-ca.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220407212230.12893-1-casey@schaufler-ca.com> References: <20220407212230.12893-1-casey@schaufler-ca.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Change the security_current_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 Reported-by: kernel test robot Reported-by: kernel test robot Reported-by: kernel test robot --- drivers/android/binder.c | 6 +-- include/linux/security.h | 13 ++++--- 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, 95 insertions(+), 72 deletions(-) diff --git a/drivers/android/binder.c b/drivers/android/binder.c index 381a4fddd4a5..bae8440ffc73 100644 --- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -2980,16 +2980,16 @@ 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 4646ca90f457..10ff7db2232e 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -502,8 +502,8 @@ 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_current_getsecid_subj(u32 *secid); -void security_task_getsecid_obj(struct task_struct *p, u32 *secid); +void security_current_getsecid_subj(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); @@ -1199,14 +1199,15 @@ 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_getsecid_subj(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 2acf95cf9895..0a7869c9c9ad 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -2178,19 +2178,12 @@ int audit_log_task_context(struct audit_buffer *ab) char *ctx = NULL; unsigned len; int error; - u32 sid; struct lsmblob blob; - security_current_getsecid_subj(&sid); - if (!sid) + security_current_getsecid_subj(&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) { @@ -2399,6 +2392,7 @@ 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 || @@ -2409,7 +2403,9 @@ int audit_signal_info(int sig, struct task_struct *t) audit_sig_uid = auid; else audit_sig_uid = uid; - security_current_getsecid_subj(&audit_sig_sid); + security_current_getsecid_subj(&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 15cd4fe35e9c..39ded5cb2429 100644 --- a/kernel/auditfilter.c +++ b/kernel/auditfilter.c @@ -1339,7 +1339,6 @@ 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: @@ -1369,8 +1368,7 @@ int audit_filter(int msgtype, unsigned int listtype) case AUDIT_SUBJ_SEN: case AUDIT_SUBJ_CLR: if (f->lsm_str) { - security_current_getsecid_subj(&sid); - lsmblob_init(&blob, sid); + security_current_getsecid_subj(&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 d125dba69a76..5ad606cc4814 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; @@ -676,17 +675,9 @@ static int audit_filter_rules(struct task_struct *tsk, * here even though it always refs * @current's creds */ - security_current_getsecid_subj(&sid); + security_current_getsecid_subj(&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); @@ -2764,12 +2755,15 @@ 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); } @@ -2785,6 +2779,7 @@ 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; @@ -2796,7 +2791,9 @@ 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; } @@ -2817,7 +2814,9 @@ 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 0a99663e6edb..c86df6ead742 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_current_getsecid_subj(&audit_info.secid); + security_current_getsecid_subj(&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 d6c5b31eb4eb..3d5610ed5f0e 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_getsecid_subj(&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 17232bbfb9f9..217d20c60e1d 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_current_getsecid_subj(&secid); - return ima_match_policy(mnt_userns, inode, current_cred(), secid, - func, mask, IMA_APPRAISE | IMA_HASH, NULL, - NULL, NULL, NULL); + security_current_getsecid_subj(&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 3d3f8c5c502b..2d99cb996d5f 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_current_getsecid_subj(&secid); - return process_measurement(file, current_cred(), secid, NULL, - 0, MAY_EXEC, MMAP_CHECK); + security_current_getsecid_subj(&blob); + /* scaffolding - until process_measurement changes */ + return process_measurement(file, current_cred(), blob.secid[0], + NULL, 0, MAY_EXEC, MMAP_CHECK); } return 0; @@ -437,9 +438,9 @@ 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? */ @@ -447,11 +448,11 @@ int ima_file_mprotect(struct vm_area_struct *vma, unsigned long prot) !(prot & PROT_EXEC) || (vma->vm_flags & VM_EXEC)) return 0; - security_current_getsecid_subj(&secid); + security_current_getsecid_subj(&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))) @@ -487,10 +488,12 @@ 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_getsecid_subj(&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; @@ -511,10 +514,11 @@ int ima_bprm_check(struct linux_binprm *bprm) */ 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_getsecid_subj(&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); } @@ -710,7 +714,7 @@ 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 @@ -730,8 +734,9 @@ 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_current_getsecid_subj(&secid); - return process_measurement(file, current_cred(), secid, NULL, + security_current_getsecid_subj(&blob); + /* scaffolding - until process_measurement changes */ + return process_measurement(file, current_cred(), blob.secid[0], NULL, 0, MAY_READ, func); } @@ -760,7 +765,7 @@ 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) @@ -773,9 +778,10 @@ int ima_post_read_file(struct file *file, void *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, - MAY_READ, func); + security_current_getsecid_subj(&blob); + /* scaffolding - until process_measurement changes */ + return process_measurement(file, current_cred(), blob.secid[0], buf, + size, MAY_READ, func); } /** @@ -900,7 +906,7 @@ 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; @@ -923,9 +929,10 @@ int process_buffer_measurement(struct user_namespace *mnt_userns, * buffer measurements. */ if (func) { - security_current_getsecid_subj(&secid); + security_current_getsecid_subj(&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 131c851dd681..eae5b7f3a0db 100644 --- a/security/security.c +++ b/security/security.c @@ -1922,17 +1922,30 @@ int security_task_getsid(struct task_struct *p) return call_int_hook(task_getsid, 0, p); } -void security_current_getsecid_subj(u32 *secid) +void security_current_getsecid_subj(struct lsmblob *blob) { - *secid = 0; - call_void_hook(current_getsecid_subj, secid); + struct security_hook_list *hp; + + lsmblob_init(blob, 0); + hlist_for_each_entry(hp, &security_hook_heads.current_getsecid_subj, + list) { + if (WARN_ON(hp->lsmid->slot < 0 || hp->lsmid->slot >= lsm_slot)) + continue; + hp->hook.current_getsecid_subj(&blob->secid[hp->lsmid->slot]); + } } EXPORT_SYMBOL(security_current_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);