From: Mimi Zohar <zohar@linux.vnet.ibm.com> To: linux-security-module@vger.kernel.org, "Luis R. Rodriguez" <mcgrof@suse.com>, kexec@lists.infradead.org, linux-modules@vger.kernel.org, fsdevel@vger.kernel.org, David Howells <dhowells@redhat.com>, David Woodhouse <dwmw2@infradead.org>, Kees Cook <keescook@chromium.org>, Dmitry Torokhov <dmitry.torokhov@gmail.com>, Dmitry Kasatkin <dmitry.kasatkin@gmail.com>, Eric Biederman <ebiederm@xmission.com>, Rusty Russell <rusty@rustcorp.com.au> Cc: Mimi Zohar <zohar@linux.vnet.ibm.com> Subject: [PATCH v3 21/22] ima: measure and appraise the IMA policy itself Date: Wed, 3 Feb 2016 14:06:29 -0500 [thread overview] Message-ID: <1454526390-19792-22-git-send-email-zohar@linux.vnet.ibm.com> (raw) In-Reply-To: <1454526390-19792-1-git-send-email-zohar@linux.vnet.ibm.com> Add support for measuring and appraising the IMA policy itself. Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com> --- security/integrity/ima/ima.h | 2 ++ security/integrity/ima/ima_fs.c | 9 ++++++++- security/integrity/ima/ima_main.c | 3 +++ security/integrity/ima/ima_policy.c | 10 +++++++++- 4 files changed, 22 insertions(+), 2 deletions(-) diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h index 832e62a..6685968 100644 --- a/security/integrity/ima/ima.h +++ b/security/integrity/ima/ima.h @@ -149,6 +149,7 @@ enum ima_hooks { FIRMWARE_CHECK, KEXEC_CHECK, INITRAMFS_CHECK, + POLICY_CHECK, MAX_CHECK }; @@ -191,6 +192,7 @@ int ima_policy_show(struct seq_file *m, void *v); #define IMA_APPRAISE_LOG 0x04 #define IMA_APPRAISE_MODULES 0x08 #define IMA_APPRAISE_FIRMWARE 0x10 +#define IMA_APPRAISE_POLICY 0x20 #ifdef CONFIG_IMA_APPRAISE int ima_appraise_measurement(enum ima_hooks func, diff --git a/security/integrity/ima/ima_fs.c b/security/integrity/ima/ima_fs.c index 00ccd67..7b15e80 100644 --- a/security/integrity/ima/ima_fs.c +++ b/security/integrity/ima/ima_fs.c @@ -325,7 +325,14 @@ static ssize_t ima_write_policy(struct file *file, const char __user *buf, if (data[0] == '/') result = ima_read_policy(data); - else + else if (ima_appraise & IMA_APPRAISE_POLICY) { + pr_err("IMA: signed policy required\n"); + integrity_audit_msg(AUDIT_INTEGRITY_STATUS, NULL, NULL, + "policy_update", "signed policy required", + 1, 0); + if (ima_appraise & IMA_APPRAISE_ENFORCE) + result = -EACCES; + } else result = ima_parse_add_rule(data); mutex_unlock(&ima_write_mutex); out_free: diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c index ccf9526..497a6f2 100644 --- a/security/integrity/ima/ima_main.c +++ b/security/integrity/ima/ima_main.c @@ -386,6 +386,9 @@ int ima_post_read_file(struct file *file, void *buf, loff_t size, case READING_KEXEC_INITRAMFS: func = INITRAMFS_CHECK; break; + case READING_POLICY: + func = POLICY_CHECK; + break; default: func = FILE_CHECK; break; diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c index d02560e..39a811a 100644 --- a/security/integrity/ima/ima_policy.c +++ b/security/integrity/ima/ima_policy.c @@ -114,6 +114,7 @@ static struct ima_rule_entry default_measurement_rules[] = { .uid = GLOBAL_ROOT_UID, .flags = IMA_FUNC | IMA_INMASK | IMA_UID}, {.action = MEASURE, .func = MODULE_CHECK, .flags = IMA_FUNC}, {.action = MEASURE, .func = FIRMWARE_CHECK, .flags = IMA_FUNC}, + {.action = MEASURE, .func = POLICY_CHECK, .flags = IMA_FUNC}, }; static struct ima_rule_entry default_appraise_rules[] = { @@ -616,6 +617,8 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry) entry->func = KEXEC_CHECK; else if (strcmp(args[0].from, "INITRAMFS_CHECK") == 0) entry->func = INITRAMFS_CHECK; + else if (strcmp(args[0].from, "POLICY_CHECK") == 0) + entry->func = POLICY_CHECK; else result = -EINVAL; if (!result) @@ -774,6 +777,8 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry) temp_ima_appraise |= IMA_APPRAISE_MODULES; else if (entry->func == FIRMWARE_CHECK) temp_ima_appraise |= IMA_APPRAISE_FIRMWARE; + else if (entry->func == POLICY_CHECK) + temp_ima_appraise |= IMA_APPRAISE_POLICY; audit_log_format(ab, "res=%d", !result); audit_log_end(ab); return result; @@ -860,7 +865,7 @@ static char *mask_tokens[] = { enum { func_file = 0, func_mmap, func_bprm, func_module, func_firmware, func_post, - func_kexec, func_initramfs + func_kexec, func_initramfs, func_policy }; static char *func_tokens[] = { @@ -940,6 +945,9 @@ static void policy_func_show(struct seq_file *m, enum ima_hooks func) case INITRAMFS_CHECK: seq_printf(m, pt(Opt_func), ft(func_initramfs)); break; + case POLICY_CHECK: + seq_printf(m, pt(Opt_func), ft(func_policy)); + break; default: snprintf(tbuf, sizeof(tbuf), "%d", func); seq_printf(m, pt(Opt_func), tbuf); -- 2.1.0
WARNING: multiple messages have this Message-ID (diff)
From: Mimi Zohar <zohar@linux.vnet.ibm.com> To: linux-security-module@vger.kernel.org, "Luis R. Rodriguez" <mcgrof@suse.com>, kexec@lists.infradead.org, linux-modules@vger.kernel.org, fsdevel@vger.kernel.org, David Howells <dhowells@redhat.com>, David Woodhouse <dwmw2@infradead.org>, Kees Cook <keescook@chromium.org>, Dmitry Torokhov <dmitry.torokhov@gmail.com>, Dmitry Kasatkin <dmitry.kasatkin@gmail.com>, Eric Biederman <ebiederm@xmission.com>, Rusty Russell <rusty@rustcorp.com.au> Cc: Mimi Zohar <zohar@linux.vnet.ibm.com> Subject: [PATCH v3 21/22] ima: measure and appraise the IMA policy itself Date: Wed, 3 Feb 2016 14:06:29 -0500 [thread overview] Message-ID: <1454526390-19792-22-git-send-email-zohar@linux.vnet.ibm.com> (raw) In-Reply-To: <1454526390-19792-1-git-send-email-zohar@linux.vnet.ibm.com> Add support for measuring and appraising the IMA policy itself. Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com> --- security/integrity/ima/ima.h | 2 ++ security/integrity/ima/ima_fs.c | 9 ++++++++- security/integrity/ima/ima_main.c | 3 +++ security/integrity/ima/ima_policy.c | 10 +++++++++- 4 files changed, 22 insertions(+), 2 deletions(-) diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h index 832e62a..6685968 100644 --- a/security/integrity/ima/ima.h +++ b/security/integrity/ima/ima.h @@ -149,6 +149,7 @@ enum ima_hooks { FIRMWARE_CHECK, KEXEC_CHECK, INITRAMFS_CHECK, + POLICY_CHECK, MAX_CHECK }; @@ -191,6 +192,7 @@ int ima_policy_show(struct seq_file *m, void *v); #define IMA_APPRAISE_LOG 0x04 #define IMA_APPRAISE_MODULES 0x08 #define IMA_APPRAISE_FIRMWARE 0x10 +#define IMA_APPRAISE_POLICY 0x20 #ifdef CONFIG_IMA_APPRAISE int ima_appraise_measurement(enum ima_hooks func, diff --git a/security/integrity/ima/ima_fs.c b/security/integrity/ima/ima_fs.c index 00ccd67..7b15e80 100644 --- a/security/integrity/ima/ima_fs.c +++ b/security/integrity/ima/ima_fs.c @@ -325,7 +325,14 @@ static ssize_t ima_write_policy(struct file *file, const char __user *buf, if (data[0] == '/') result = ima_read_policy(data); - else + else if (ima_appraise & IMA_APPRAISE_POLICY) { + pr_err("IMA: signed policy required\n"); + integrity_audit_msg(AUDIT_INTEGRITY_STATUS, NULL, NULL, + "policy_update", "signed policy required", + 1, 0); + if (ima_appraise & IMA_APPRAISE_ENFORCE) + result = -EACCES; + } else result = ima_parse_add_rule(data); mutex_unlock(&ima_write_mutex); out_free: diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c index ccf9526..497a6f2 100644 --- a/security/integrity/ima/ima_main.c +++ b/security/integrity/ima/ima_main.c @@ -386,6 +386,9 @@ int ima_post_read_file(struct file *file, void *buf, loff_t size, case READING_KEXEC_INITRAMFS: func = INITRAMFS_CHECK; break; + case READING_POLICY: + func = POLICY_CHECK; + break; default: func = FILE_CHECK; break; diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c index d02560e..39a811a 100644 --- a/security/integrity/ima/ima_policy.c +++ b/security/integrity/ima/ima_policy.c @@ -114,6 +114,7 @@ static struct ima_rule_entry default_measurement_rules[] = { .uid = GLOBAL_ROOT_UID, .flags = IMA_FUNC | IMA_INMASK | IMA_UID}, {.action = MEASURE, .func = MODULE_CHECK, .flags = IMA_FUNC}, {.action = MEASURE, .func = FIRMWARE_CHECK, .flags = IMA_FUNC}, + {.action = MEASURE, .func = POLICY_CHECK, .flags = IMA_FUNC}, }; static struct ima_rule_entry default_appraise_rules[] = { @@ -616,6 +617,8 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry) entry->func = KEXEC_CHECK; else if (strcmp(args[0].from, "INITRAMFS_CHECK") == 0) entry->func = INITRAMFS_CHECK; + else if (strcmp(args[0].from, "POLICY_CHECK") == 0) + entry->func = POLICY_CHECK; else result = -EINVAL; if (!result) @@ -774,6 +777,8 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry) temp_ima_appraise |= IMA_APPRAISE_MODULES; else if (entry->func == FIRMWARE_CHECK) temp_ima_appraise |= IMA_APPRAISE_FIRMWARE; + else if (entry->func == POLICY_CHECK) + temp_ima_appraise |= IMA_APPRAISE_POLICY; audit_log_format(ab, "res=%d", !result); audit_log_end(ab); return result; @@ -860,7 +865,7 @@ static char *mask_tokens[] = { enum { func_file = 0, func_mmap, func_bprm, func_module, func_firmware, func_post, - func_kexec, func_initramfs + func_kexec, func_initramfs, func_policy }; static char *func_tokens[] = { @@ -940,6 +945,9 @@ static void policy_func_show(struct seq_file *m, enum ima_hooks func) case INITRAMFS_CHECK: seq_printf(m, pt(Opt_func), ft(func_initramfs)); break; + case POLICY_CHECK: + seq_printf(m, pt(Opt_func), ft(func_policy)); + break; default: snprintf(tbuf, sizeof(tbuf), "%d", func); seq_printf(m, pt(Opt_func), tbuf); -- 2.1.0 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec
next prev parent reply other threads:[~2016-02-03 19:09 UTC|newest] Thread overview: 154+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-02-03 19:06 [PATCH v3 00/22] vfs: support for a common kernel file loader Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-03 19:06 ` [PATCH v3 01/22] ima: separate 'security.ima' reading functionality from collect Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-03 19:06 ` [PATCH v3 02/22] ima: refactor ima_policy_show() to display "ima_hooks" rules Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-07 19:45 ` Petko Manolov 2016-02-07 19:45 ` Petko Manolov 2016-02-10 19:33 ` Dmitry Kasatkin 2016-02-10 19:33 ` Dmitry Kasatkin 2016-02-03 19:06 ` [PATCH v3 03/22] ima: use "ima_hooks" enum as function argument Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-07 19:46 ` Petko Manolov 2016-02-07 19:46 ` Petko Manolov 2016-02-10 19:35 ` Dmitry Kasatkin 2016-02-10 19:35 ` Dmitry Kasatkin 2016-02-03 19:06 ` [PATCH v3 04/22] firmware: simplify dev_*() print messages for generic helpers Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-04 17:26 ` Kees Cook 2016-02-04 17:26 ` Kees Cook 2016-02-03 19:06 ` [PATCH v3 05/22] firmware: move completing fw into a helper Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-04 17:27 ` Kees Cook 2016-02-04 17:27 ` Kees Cook 2016-02-03 19:06 ` [PATCH v3 06/22] firmware: fold successful fw read early Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-04 17:36 ` Kees Cook 2016-02-04 17:36 ` Kees Cook 2016-02-04 20:26 ` Luis R. Rodriguez 2016-02-04 20:26 ` Luis R. Rodriguez 2016-02-03 19:06 ` [PATCH v3 07/22] vfs: define a generic function to read a file from the kernel Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-04 17:41 ` Kees Cook 2016-02-04 17:41 ` Kees Cook 2016-02-03 19:06 ` [PATCH v3 08/22] vfs: define kernel_read_file_id enumeration Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-04 17:41 ` Kees Cook 2016-02-04 17:41 ` Kees Cook 2016-02-04 19:45 ` Luis R. Rodriguez 2016-02-04 19:45 ` Luis R. Rodriguez 2016-02-03 19:06 ` [PATCH v3 09/22] ima: provide buffer hash calculation function Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-03 19:06 ` [PATCH v3 10/22] ima: calculate the hash of a buffer using aynchronous hash(ahash) Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-10 19:58 ` Dmitry Kasatkin 2016-02-10 19:58 ` Dmitry Kasatkin 2016-02-03 19:06 ` [PATCH v3 11/22] ima: define a new hook to measure and appraise a file already in memory Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-10 20:27 ` Dmitry Kasatkin 2016-02-10 20:27 ` Dmitry Kasatkin 2016-02-03 19:06 ` [PATCH v3 12/22] vfs: define kernel_read_file_from_path Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-04 17:46 ` Kees Cook 2016-02-04 17:46 ` Kees Cook 2016-02-04 19:47 ` Luis R. Rodriguez 2016-02-04 19:47 ` Luis R. Rodriguez 2016-02-03 19:06 ` [PATCH v3 13/22] firmware: replace call to fw_read_file_contents() with kernel version Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-04 17:56 ` Kees Cook 2016-02-04 17:56 ` Kees Cook 2016-02-04 19:51 ` Luis R. Rodriguez 2016-02-04 19:51 ` Luis R. Rodriguez 2016-02-03 19:06 ` [PATCH v3 14/22] security: define kernel_read_file hook Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-04 17:57 ` Kees Cook 2016-02-04 17:57 ` Kees Cook 2016-02-04 19:54 ` Luis R. Rodriguez 2016-02-04 19:54 ` Luis R. Rodriguez 2016-02-11 16:54 ` Casey Schaufler 2016-02-11 16:54 ` Casey Schaufler 2016-02-11 19:35 ` Mimi Zohar 2016-02-11 19:35 ` Mimi Zohar 2016-02-03 19:06 ` [PATCH v3 15/22] vfs: define kernel_copy_file_from_fd() Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-04 17:58 ` Kees Cook 2016-02-04 17:58 ` Kees Cook 2016-02-04 19:55 ` Luis R. Rodriguez 2016-02-04 19:55 ` Luis R. Rodriguez 2016-02-03 19:06 ` [PATCH v3 16/22] module: replace copy_module_from_fd with kernel version Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-04 18:04 ` Kees Cook 2016-02-04 18:04 ` Kees Cook 2016-02-04 19:56 ` Luis R. Rodriguez 2016-02-04 19:56 ` Luis R. Rodriguez 2016-02-05 0:19 ` Mimi Zohar 2016-02-05 0:19 ` Mimi Zohar 2016-02-03 19:06 ` [PATCH v3 17/22] ima: remove firmware and module specific cached status info Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-07 19:56 ` Petko Manolov 2016-02-07 19:56 ` Petko Manolov 2016-02-10 20:18 ` Dmitry Kasatkin 2016-02-10 20:18 ` Dmitry Kasatkin 2016-02-10 23:14 ` Mimi Zohar 2016-02-10 23:14 ` Mimi Zohar 2016-02-03 19:06 ` [PATCH v3 18/22] kexec: replace call to copy_file_from_fd() with kernel version Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-04 18:05 ` Kees Cook 2016-02-04 18:05 ` Kees Cook 2016-02-04 19:57 ` Luis R. Rodriguez 2016-02-04 19:57 ` Luis R. Rodriguez 2016-02-12 12:50 ` Dave Young 2016-02-12 12:50 ` Dave Young 2016-02-03 19:06 ` [PATCH v3 19/22] ima: support for kexec image and initramfs Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-07 20:10 ` Petko Manolov 2016-02-07 20:10 ` Petko Manolov 2016-02-08 23:34 ` Mimi Zohar 2016-02-08 23:34 ` Mimi Zohar 2016-02-10 21:09 ` Dmitry Kasatkin 2016-02-10 21:09 ` Dmitry Kasatkin 2016-02-10 23:21 ` Mimi Zohar 2016-02-10 23:21 ` Mimi Zohar [not found] ` <CACE9dm8OJ1cgbKszUG-pCiEMVarUFLLWi_jewVV-JEMGAJsA-g@mail.gmail.com> 2016-02-11 2:08 ` Mimi Zohar 2016-02-11 2:08 ` Mimi Zohar 2016-02-11 8:47 ` Dmitry Kasatkin 2016-02-11 8:47 ` Dmitry Kasatkin 2016-02-11 12:16 ` Mimi Zohar 2016-02-11 12:16 ` Mimi Zohar 2016-02-12 12:53 ` Dave Young 2016-02-12 12:53 ` Dave Young 2016-02-12 13:09 ` Mimi Zohar 2016-02-12 13:09 ` Mimi Zohar 2016-02-03 19:06 ` [PATCH v3 20/22] ima: load policy using path Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-07 19:59 ` Petko Manolov 2016-02-07 19:59 ` Petko Manolov 2016-02-08 9:58 ` Dmitry Kasatkin 2016-02-08 9:58 ` Dmitry Kasatkin 2016-02-08 10:35 ` Petko Manolov 2016-02-08 10:35 ` Petko Manolov 2016-02-08 10:45 ` Dmitry Kasatkin 2016-02-08 10:45 ` Dmitry Kasatkin 2016-02-08 21:12 ` Mimi Zohar 2016-02-08 21:12 ` Mimi Zohar 2016-02-09 7:47 ` Petko Manolov 2016-02-09 7:47 ` Petko Manolov 2016-02-03 19:06 ` Mimi Zohar [this message] 2016-02-03 19:06 ` [PATCH v3 21/22] ima: measure and appraise the IMA policy itself Mimi Zohar 2016-02-07 20:01 ` Petko Manolov 2016-02-07 20:01 ` Petko Manolov 2016-02-10 20:22 ` Dmitry Kasatkin 2016-02-10 20:22 ` Dmitry Kasatkin 2016-02-10 23:15 ` Mimi Zohar 2016-02-10 23:15 ` Mimi Zohar 2016-02-03 19:06 ` [PATCH v3 22/22] ima: require signed IMA policy Mimi Zohar 2016-02-03 19:06 ` Mimi Zohar 2016-02-07 20:02 ` Petko Manolov 2016-02-07 20:02 ` Petko Manolov 2016-02-10 20:24 ` Dmitry Kasatkin 2016-02-10 20:24 ` Dmitry Kasatkin 2016-02-04 18:15 ` [PATCH v3 00/22] vfs: support for a common kernel file loader Kees Cook 2016-02-04 18:15 ` Kees Cook 2016-02-04 23:54 ` Mimi Zohar 2016-02-04 23:54 ` Mimi Zohar
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