From: Casey Schaufler <casey@schaufler-ca.com> 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 Subject: [PATCH v37 27/33] Audit: Add record for multiple task security contexts Date: Mon, 27 Jun 2022 17:56:05 -0700 [thread overview] Message-ID: <20220628005611.13106-28-casey@schaufler-ca.com> (raw) In-Reply-To: <20220628005611.13106-1-casey@schaufler-ca.com> Create a new audit record AUDIT_MAC_TASK_CONTEXTS. An example of the MAC_TASK_CONTEXTS (1420) record is: type=MAC_TASK_CONTEXTS[1420] msg=audit(1600880931.832:113) subj_apparmor=unconfined subj_smack=_ When an audit event includes a AUDIT_MAC_TASK_CONTEXTS record the "subj=" field in other records in the event will be "subj=?". An AUDIT_MAC_TASK_CONTEXTS record is supplied when the system has multiple security modules that may make access decisions based on a subject security context. Acked-by: Paul Moore <paul@paul-moore.com> Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> --- include/uapi/linux/audit.h | 1 + kernel/audit.c | 42 +++++++++++++++++++++++++++++++------- 2 files changed, 36 insertions(+), 7 deletions(-) diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h index 7c1dc818b1d5..7a5966b46f38 100644 --- a/include/uapi/linux/audit.h +++ b/include/uapi/linux/audit.h @@ -143,6 +143,7 @@ #define AUDIT_MAC_UNLBL_STCDEL 1417 /* NetLabel: del a static label */ #define AUDIT_MAC_CALIPSO_ADD 1418 /* NetLabel: add CALIPSO DOI entry */ #define AUDIT_MAC_CALIPSO_DEL 1419 /* NetLabel: del CALIPSO DOI entry */ +#define AUDIT_MAC_TASK_CONTEXTS 1420 /* Multiple LSM task contexts */ #define AUDIT_FIRST_KERN_ANOM_MSG 1700 #define AUDIT_LAST_KERN_ANOM_MSG 1799 diff --git a/kernel/audit.c b/kernel/audit.c index e4cd2cdda7f5..cee5ee02abc6 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -2228,6 +2228,7 @@ static void audit_buffer_aux_end(struct audit_buffer *ab) int audit_log_task_context(struct audit_buffer *ab) { + int i; int error; struct lsmblob blob; struct lsmcontext context; @@ -2236,16 +2237,43 @@ int audit_log_task_context(struct audit_buffer *ab) if (!lsmblob_is_set(&blob)) return 0; - error = security_secid_to_secctx(&blob, &context, LSMBLOB_FIRST); - - if (error) { - if (error != -EINVAL) + if (!lsm_multiple_contexts()) { + error = security_secid_to_secctx(&blob, &context, + LSMBLOB_FIRST); + if (error) { + if (error != -EINVAL) + goto error_path; + return 0; + } + audit_log_format(ab, " subj=%s", context.context); + security_release_secctx(&context); + } else { + /* Multiple LSMs provide contexts. Include an aux record. */ + audit_log_format(ab, " subj=?"); + error = audit_buffer_aux_new(ab, AUDIT_MAC_TASK_CONTEXTS); + if (error) goto error_path; - return 0; + for (i = 0; i < LSMBLOB_ENTRIES; i++) { + if (blob.secid[i] == 0) + continue; + error = security_secid_to_secctx(&blob, &context, i); + if (error) { + audit_log_format(ab, "%ssubj_%s=?", + i ? " " : "", + lsm_slot_to_name(i)); + if (error != -EINVAL) + audit_panic("error in audit_log_task_context"); + } else { + audit_log_format(ab, "%ssubj_%s=%s", + i ? " " : "", + lsm_slot_to_name(i), + context.context); + security_release_secctx(&context); + } + } + audit_buffer_aux_end(ab); } - audit_log_format(ab, " subj=%s", context.context); - security_release_secctx(&context); return 0; error_path: -- 2.36.1
WARNING: multiple messages have this Message-ID (diff)
From: Casey Schaufler <casey@schaufler-ca.com> To: casey.schaufler@intel.com, jmorris@namei.org, linux-security-module@vger.kernel.org, selinux@vger.kernel.org Cc: john.johansen@canonical.com, linux-kernel@vger.kernel.org, linux-audit@redhat.com Subject: [PATCH v37 27/33] Audit: Add record for multiple task security contexts Date: Mon, 27 Jun 2022 17:56:05 -0700 [thread overview] Message-ID: <20220628005611.13106-28-casey@schaufler-ca.com> (raw) In-Reply-To: <20220628005611.13106-1-casey@schaufler-ca.com> Create a new audit record AUDIT_MAC_TASK_CONTEXTS. An example of the MAC_TASK_CONTEXTS (1420) record is: type=MAC_TASK_CONTEXTS[1420] msg=audit(1600880931.832:113) subj_apparmor=unconfined subj_smack=_ When an audit event includes a AUDIT_MAC_TASK_CONTEXTS record the "subj=" field in other records in the event will be "subj=?". An AUDIT_MAC_TASK_CONTEXTS record is supplied when the system has multiple security modules that may make access decisions based on a subject security context. Acked-by: Paul Moore <paul@paul-moore.com> Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> --- include/uapi/linux/audit.h | 1 + kernel/audit.c | 42 +++++++++++++++++++++++++++++++------- 2 files changed, 36 insertions(+), 7 deletions(-) diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h index 7c1dc818b1d5..7a5966b46f38 100644 --- a/include/uapi/linux/audit.h +++ b/include/uapi/linux/audit.h @@ -143,6 +143,7 @@ #define AUDIT_MAC_UNLBL_STCDEL 1417 /* NetLabel: del a static label */ #define AUDIT_MAC_CALIPSO_ADD 1418 /* NetLabel: add CALIPSO DOI entry */ #define AUDIT_MAC_CALIPSO_DEL 1419 /* NetLabel: del CALIPSO DOI entry */ +#define AUDIT_MAC_TASK_CONTEXTS 1420 /* Multiple LSM task contexts */ #define AUDIT_FIRST_KERN_ANOM_MSG 1700 #define AUDIT_LAST_KERN_ANOM_MSG 1799 diff --git a/kernel/audit.c b/kernel/audit.c index e4cd2cdda7f5..cee5ee02abc6 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -2228,6 +2228,7 @@ static void audit_buffer_aux_end(struct audit_buffer *ab) int audit_log_task_context(struct audit_buffer *ab) { + int i; int error; struct lsmblob blob; struct lsmcontext context; @@ -2236,16 +2237,43 @@ int audit_log_task_context(struct audit_buffer *ab) if (!lsmblob_is_set(&blob)) return 0; - error = security_secid_to_secctx(&blob, &context, LSMBLOB_FIRST); - - if (error) { - if (error != -EINVAL) + if (!lsm_multiple_contexts()) { + error = security_secid_to_secctx(&blob, &context, + LSMBLOB_FIRST); + if (error) { + if (error != -EINVAL) + goto error_path; + return 0; + } + audit_log_format(ab, " subj=%s", context.context); + security_release_secctx(&context); + } else { + /* Multiple LSMs provide contexts. Include an aux record. */ + audit_log_format(ab, " subj=?"); + error = audit_buffer_aux_new(ab, AUDIT_MAC_TASK_CONTEXTS); + if (error) goto error_path; - return 0; + for (i = 0; i < LSMBLOB_ENTRIES; i++) { + if (blob.secid[i] == 0) + continue; + error = security_secid_to_secctx(&blob, &context, i); + if (error) { + audit_log_format(ab, "%ssubj_%s=?", + i ? " " : "", + lsm_slot_to_name(i)); + if (error != -EINVAL) + audit_panic("error in audit_log_task_context"); + } else { + audit_log_format(ab, "%ssubj_%s=%s", + i ? " " : "", + lsm_slot_to_name(i), + context.context); + security_release_secctx(&context); + } + } + audit_buffer_aux_end(ab); } - audit_log_format(ab, " subj=%s", context.context); - security_release_secctx(&context); return 0; error_path: -- 2.36.1 -- Linux-audit mailing list Linux-audit@redhat.com https://listman.redhat.com/mailman/listinfo/linux-audit
next prev parent reply other threads:[~2022-06-28 1:13 UTC|newest] Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <20220628005611.13106-1-casey.ref@schaufler-ca.com> 2022-06-28 0:55 ` [PATCH v37 00/33] LSM: Module stacking for AppArmor Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 0:55 ` [PATCH v37 01/33] integrity: disassociate ima_filter_rule from security_audit_rule Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 0:55 ` [PATCH v37 02/33] LSM: Infrastructure management of the sock security Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 0:55 ` [PATCH v37 03/33] LSM: Add the lsmblob data structure Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 0:55 ` [PATCH v37 04/33] LSM: provide lsm name and id slot mappings Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 0:55 ` [PATCH v37 05/33] IMA: avoid label collisions with stacked LSMs Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 0:55 ` [PATCH v37 06/33] LSM: Use lsmblob in security_audit_rule_match Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 0:55 ` [PATCH v37 07/33] LSM: Use lsmblob in security_kernel_act_as Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 0:55 ` [PATCH v37 08/33] LSM: Use lsmblob in security_secctx_to_secid Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 0:55 ` [PATCH v37 09/33] LSM: Use lsmblob in security_secid_to_secctx Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 0:55 ` [PATCH v37 10/33] LSM: Use lsmblob in security_ipc_getsecid Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 0:55 ` [PATCH v37 11/33] LSM: Use lsmblob in security_current_getsecid Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 0:55 ` [PATCH v37 12/33] LSM: Use lsmblob in security_inode_getsecid Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 0:55 ` [PATCH v37 13/33] LSM: Use lsmblob in security_cred_getsecid Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 0:55 ` [PATCH v37 14/33] LSM: Specify which LSM to display Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 0:55 ` [PATCH v37 15/33] LSM: Ensure the correct LSM context releaser Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 0:55 ` [PATCH v37 16/33] LSM: Use lsmcontext in security_secid_to_secctx Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 0:55 ` [PATCH v37 17/33] LSM: Use lsmcontext in security_inode_getsecctx Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 0:55 ` [PATCH v37 18/33] LSM: Use lsmcontext in security_dentry_init_security Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 5:36 ` kernel test robot 2022-06-28 5:36 ` kernel test robot 2022-06-28 8:44 ` kernel test robot 2022-06-28 8:44 ` kernel test robot 2022-06-28 11:24 ` kernel test robot 2022-06-28 11:24 ` kernel test robot 2022-06-28 0:55 ` [PATCH v37 19/33] LSM: security_secid_to_secctx in netlink netfilter Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 0:55 ` [PATCH v37 20/33] NET: Store LSM netlabel data in a lsmblob Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 0:55 ` [PATCH v37 21/33] binder: Pass LSM identifier for confirmation Casey Schaufler 2022-06-28 0:55 ` Casey Schaufler 2022-06-28 0:56 ` [PATCH v37 22/33] LSM: security_secid_to_secctx module selection Casey Schaufler 2022-06-28 0:56 ` Casey Schaufler 2022-06-28 0:56 ` [PATCH v37 23/33] Audit: Keep multiple LSM data in audit_names Casey Schaufler 2022-06-28 0:56 ` Casey Schaufler 2022-06-28 0:56 ` [PATCH v37 24/33] Audit: Create audit_stamp structure Casey Schaufler 2022-06-28 0:56 ` Casey Schaufler 2022-06-28 0:56 ` [PATCH v37 25/33] LSM: Add a function to report multiple LSMs Casey Schaufler 2022-06-28 0:56 ` Casey Schaufler 2022-06-28 0:56 ` [PATCH v37 26/33] Audit: Allow multiple records in an audit_buffer Casey Schaufler 2022-06-28 0:56 ` Casey Schaufler 2022-06-28 0:56 ` Casey Schaufler [this message] 2022-06-28 0:56 ` [PATCH v37 27/33] Audit: Add record for multiple task security contexts Casey Schaufler 2022-06-28 0:56 ` [PATCH v37 28/33] audit: multiple subject lsm values for netlabel Casey Schaufler 2022-06-28 0:56 ` Casey Schaufler 2022-06-28 0:56 ` [PATCH v37 29/33] Audit: Add record for multiple object contexts Casey Schaufler 2022-06-28 0:56 ` Casey Schaufler 2022-06-28 0:56 ` [PATCH v37 30/33] netlabel: Use a struct lsmblob in audit data Casey Schaufler 2022-06-28 0:56 ` Casey Schaufler 2022-06-28 0:56 ` [PATCH v37 31/33] LSM: Removed scaffolding function lsmcontext_init Casey Schaufler 2022-06-28 0:56 ` Casey Schaufler 2022-06-28 0:56 ` [PATCH v37 32/33] LSM: Add /proc attr entry for full LSM context Casey Schaufler 2022-06-28 0:56 ` Casey Schaufler 2022-06-28 0:56 ` [PATCH v37 33/33] AppArmor: Remove the exclusive flag Casey Schaufler 2022-06-28 0:56 ` Casey Schaufler 2022-07-12 21:42 ` [PATCH v37 00/33] LSM: Module stacking for AppArmor John Johansen 2022-07-12 21:42 ` John Johansen 2022-07-12 21:58 ` Casey Schaufler 2022-07-12 21:58 ` Casey Schaufler
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20220628005611.13106-28-casey@schaufler-ca.com \ --to=casey@schaufler-ca.com \ --cc=casey.schaufler@intel.com \ --cc=jmorris@namei.org \ --cc=john.johansen@canonical.com \ --cc=keescook@chromium.org \ --cc=linux-audit@redhat.com \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-security-module@vger.kernel.org \ --cc=paul@paul-moore.com \ --cc=penguin-kernel@i-love.sakura.ne.jp \ --cc=selinux@vger.kernel.org \ --cc=stephen.smalley.work@gmail.com \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.