From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 78CCCC282E0 for ; Tue, 9 Apr 2019 20:00:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4013C20883 for ; Tue, 9 Apr 2019 20:00:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=yahoo.com header.i=@yahoo.com header.b="lQx68RCt" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726907AbfDIUAq (ORCPT ); Tue, 9 Apr 2019 16:00:46 -0400 Received: from sonic304-28.consmr.mail.ne1.yahoo.com ([66.163.191.154]:34948 "EHLO sonic304-28.consmr.mail.ne1.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726890AbfDIUAp (ORCPT ); Tue, 9 Apr 2019 16:00:45 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1554840044; bh=7gPoCWetxgh6OIRNGIIxTECY/QFBwCB1nRYgDUU/GGw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From:Subject; b=lQx68RCt9/9QdgNGcEIANpw736vzXjIr5lVhS71Dc8ysQZiF5GlkCc2ec1ejEt4GUQHjp/3tz5Sq7IaTBA3HOg3SChDCrPFddeb1kiQpM+TO6Z1mnTTz5ZA/5SKIsAPIf0U/Yl+TOJgDd7Ns3jBoEveinXNkowdozqPMwQCGHfFeC5IA7mcevyQ7lxX0c6JCQjUNngFCO3XlFJyNkRiOELV+Dnq/+Cz8+HOv1u5PffNLlakjmbJrV58qCf2/RhAklrgDe2+isQ1fNxOYZ3hBle9AkgLjedtASGbb647O0tW/S+i3T+8voVxx5OLexBM0JRDW2MJmkKm3vf2q1NmJ4A== X-YMail-OSG: 0QZhezcVM1kWeUP9R1TytzQzOcI3DvmGyuo1NI2P8Fye5G8EAWiBRAnJOB4f4J0 8vQLOTaYAUQKaBToA.op0bkUq9ES9sZpwz96UAGSKtdWR8fC8hC88DUt.YjcBi5T_CpO4GW6HwW8 goM7wNl9qsaFQy4x.VLvPlacTL0psmIPqGXaNBwZhTvF078GQi0FFbQ0K8UtBN5wDF4JR4ayETGn 1VAKNo1wJd91hWLa1etGgUeA3L92OFVCxrqKdJoWcNvzYQQgARd8kxcSXs2SeWuMD3I5f1Rqi0Ka YaV02DfnkdnBx_DqoCh4XdxvZJcN.U8UL5HyTDYWEWXv2I0rtNj.sG5uqwOrvpKFZylS.vIeaWxd ZqdUNCv9uURmawyODWfYG_QumMA6YIjq8jwzuL_y_1uIVkSeFjVB57k4t41_gsYG26hlYjm38vLj Vr4VTBdQPQvx4wA8QncfxXTe7URVhLXszugEqy2No4qBDqP9FuzptxspqDcqa3pcEg4i4oGX_5Ab M3jeAppNr7YQBHWYmh4.VJwChkMCTBG2CraFoBSeahntb.sT8EoBgpKR4oBsZEVbEnzHMR9Mxgum Hd2lLuU1uegTcJ9Ev4uqIYShsecm8WyB87PBlmH6LtLztMA1cxREDZrSYrLmvvWL8cor0pSs.K4H 1ozo0udCGnoCzCbnbF04MhZvfaJld17owV9qqJrsHKyqeO.XbgRiCtaZ9P5L.rapeRGstVATYOBQ MHeTU0LRyk6Sh_gwHG2EENiiMKGMzhqdybq3CHj0m_XmRXmKM439bf4LSBoEEyeBAXtVTIc4YF98 R3GkbIrxRb9jzIvpUQ2KIu6z1IulVyBST5sbE0kImXlu.hxL9AmAnk3Au__YOqClGAjV1wPJFRo9 bknW8xWECjrp82ShP8YH2mPHzL.ESpRg0PRnS8wWENlcBV2ySynk6U1EVIFhEG8p3YleKoIwT86G vJKBssI19aAkcyslZyQInfRRaSP6557lm7GrjD2o3J7kHBTAAm_il81c8yUloxT5hNSDyR2bq1nb 3UzQsfmFYuRoHnXvY2a6wk6DS.H_Tnv7TVscvPVcVLJEfhTZjsIB01vPr2b.ceOgD60XVmWYih5y 5Lllptff.QL5rWQQSfjB3onBGtj3YFWBd251PIsdyc3cgrGMzfkAohvg3Deo_ Received: from sonic.gate.mail.ne1.yahoo.com by sonic304.consmr.mail.ne1.yahoo.com with HTTP; Tue, 9 Apr 2019 20:00:44 +0000 Received: from c-67-169-65-224.hsd1.ca.comcast.net (EHLO localhost.localdomain) ([67.169.65.224]) by smtp428.mail.bf1.yahoo.com (Oath Hermes SMTP Server) with ESMTPA ID dd207be9b16b6375049b46b06443493a; Tue, 09 Apr 2019 20:00:42 +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, keescook@chromium.org, john.johansen@canonical.com, penguin-kernel@i-love.sakura.ne.jp, paul@paul-moore.com, sds@tycho.nsa.gov Subject: [PATCH 38/59] LSM: Use lsm_context in secid_to_secctx hooks Date: Tue, 9 Apr 2019 12:59:03 -0700 Message-Id: <20190409195924.1509-39-casey@schaufler-ca.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20190409195924.1509-1-casey@schaufler-ca.com> References: <20190409195924.1509-1-casey@schaufler-ca.com> Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: Convert SELinux, Smack and AppArmor to use the lsm_context structure instead of a context/secid pair. There is some scaffolding involved that will be removed when the related data is updated. Signed-off-by: Casey Schaufler --- include/linux/lsm_hooks.h | 6 ++---- security/apparmor/include/secid.h | 2 +- security/apparmor/secid.c | 11 +++++------ security/security.c | 12 ++++++++++-- security/selinux/hooks.c | 5 ++--- security/smack/smack_lsm.c | 8 +++----- 6 files changed, 23 insertions(+), 21 deletions(-) diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h index af0bcdf8fcfe..566714aa0caf 100644 --- a/include/linux/lsm_hooks.h +++ b/include/linux/lsm_hooks.h @@ -1323,9 +1323,8 @@ * length and the next call which actually allocates and returns the * secdata. * @l points to the security information. - * @secdata contains the pointer that stores the converted security + * @cp contains the pointer that stores the converted security * context. - * @seclen pointer which contains the length of the data * @secctx_to_secid: * Convert security context to exported lsm data. * @l contains the pointer to the generated security data. @@ -1672,8 +1671,7 @@ union security_list_options { int (*getprocattr)(struct task_struct *p, char *name, char **value); int (*setprocattr)(const char *name, void *value, size_t size); int (*ismaclabel)(const char *name); - int (*secid_to_secctx)(struct lsm_export *l, char **secdata, - u32 *seclen); + int (*secid_to_secctx)(struct lsm_export *l, struct lsm_context *cp); int (*secctx_to_secid)(const char *secdata, u32 seclen, struct lsm_export *l); void (*release_secctx)(char *secdata, u32 seclen); diff --git a/security/apparmor/include/secid.h b/security/apparmor/include/secid.h index 5381eff03d4f..964d3dc92635 100644 --- a/security/apparmor/include/secid.h +++ b/security/apparmor/include/secid.h @@ -26,7 +26,7 @@ struct aa_label; #define AA_SECID_WILDCARD 1 struct aa_label *aa_secid_to_label(struct lsm_export *l); -int apparmor_secid_to_secctx(struct lsm_export *l, char **secdata, u32 *seclen); +int apparmor_secid_to_secctx(struct lsm_export *l, struct lsm_context *cp); int apparmor_secctx_to_secid(const char *secdata, u32 seclen, struct lsm_export *l); void apparmor_release_secctx(char *secdata, u32 seclen); diff --git a/security/apparmor/secid.c b/security/apparmor/secid.c index 69d98a89db75..4e11434605d6 100644 --- a/security/apparmor/secid.c +++ b/security/apparmor/secid.c @@ -81,7 +81,7 @@ static inline void aa_export_secid(struct lsm_export *l, u32 secid) l->apparmor = secid; } -int apparmor_secid_to_secctx(struct lsm_export *l, char **secdata, u32 *seclen) +int apparmor_secid_to_secctx(struct lsm_export *l, struct lsm_context *cp) { /* TODO: cache secctx and ref count so we don't have to recreate */ struct aa_label *label; @@ -89,13 +89,12 @@ int apparmor_secid_to_secctx(struct lsm_export *l, char **secdata, u32 *seclen) label = aa_secid_to_label(l); - AA_BUG(!seclen); - if (!label) return -EINVAL; - if (secdata) - len = aa_label_asxprint(secdata, root_ns, label, + /* scaffolding check - Casey */ + if (cp) + len = aa_label_asxprint(&cp->context, root_ns, label, FLAG_SHOW_MODE | FLAG_VIEW_SUBNS | FLAG_HIDDEN_UNCONFINED | FLAG_ABS_ROOT, GFP_ATOMIC); @@ -106,7 +105,7 @@ int apparmor_secid_to_secctx(struct lsm_export *l, char **secdata, u32 *seclen) if (len < 0) return -ENOMEM; - *seclen = len; + cp->len = len; return 0; } diff --git a/security/security.c b/security/security.c index 7bf16c547010..7cf8e268a45c 100644 --- a/security/security.c +++ b/security/security.c @@ -1989,8 +1989,16 @@ EXPORT_SYMBOL(security_ismaclabel); int security_secid_to_secctx(struct lsm_export *l, char **secdata, u32 *seclen) { - return call_one_int_hook(secid_to_secctx, -EOPNOTSUPP, l, secdata, - seclen); + struct lsm_context lc = { .context = NULL, .len = 0, }; + int rc; + + rc = call_one_int_hook(secid_to_secctx, -EOPNOTSUPP, l, &lc); + if (secdata) + *secdata = lc.context; + else + security_release_secctx(lc.context, lc.len); + *seclen = lc.len; + return rc; } EXPORT_SYMBOL(security_secid_to_secctx); diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 7dd333f133db..6a2a82dcd948 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -6301,14 +6301,13 @@ static int selinux_ismaclabel(const char *name) return (strcmp(name, XATTR_SELINUX_SUFFIX) == 0); } -static int selinux_secid_to_secctx(struct lsm_export *l, char **secdata, - u32 *seclen) +static int selinux_secid_to_secctx(struct lsm_export *l, struct lsm_context *cp) { u32 secid; selinux_import_secid(l, &secid); return security_sid_to_context(&selinux_state, secid, - secdata, seclen); + &cp->context, &cp->len); } static int selinux_secctx_to_secid(const char *secdata, u32 seclen, diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index a837af153ed9..10d6c6a1a001 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -4434,8 +4434,7 @@ static int smack_ismaclabel(const char *name) * * Exists for networking code. */ -static int smack_secid_to_secctx(struct lsm_export *l, char **secdata, - u32 *seclen) +static int smack_secid_to_secctx(struct lsm_export *l, struct lsm_context *cp) { struct smack_known *skp; u32 secid; @@ -4443,9 +4442,8 @@ static int smack_secid_to_secctx(struct lsm_export *l, char **secdata, smack_import_secid(l, &secid); skp = smack_from_secid(secid); - if (secdata) - *secdata = skp->smk_known; - *seclen = strlen(skp->smk_known); + cp->context = skp->smk_known; + cp->len = strlen(skp->smk_known); return 0; } -- 2.19.1