The patch titled
Subject: ima: permit duplicate measurement list entries
has been added to the -mm tree. Its filename is
ima-permit-duplicate-measurement-list-entries.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/ima-permit-duplicate-measurement-list-entries.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/ima-permit-duplicate-measurement-list-entries.patch
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------------------------------------------------------
From: Mimi Zohar <zohar@xxxxxxxxxxxxxxxxxx>
Subject: ima: permit duplicate measurement list entries
Measurements carried across kexec need to be added to the IMA measurement
list, but should not prevent measurements of the newly booted kernel from
being added to the measurement list. This patch adds support for allowing
duplicate measurements.
The "boot_aggregate" measurement entry is the delimiter between soft
boots.
Link: http://lkml.kernel.org/r/1473938771-2782-3-git-send-email-zohar@xxxxxxxxxxxxxxxxxx
Signed-off-by: Mimi Zohar <zohar@xxxxxxxxxxxxxxxxxx>
Cc: Eric Biederman <ebiederm@xxxxxxxxxxxx>
Cc: Dave Young <dyoung@xxxxxxxxxx>
Cc: Vivek Goyal <vgoyal@xxxxxxxxxx>
Cc: Baoquan He <bhe@xxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Stewart Smith <stewart@xxxxxxxxxxxxxxxxxx>
Cc: Mimi Zohar <zohar@xxxxxxxxxxxxxxxxxx>
Cc: Eric Richter <erichte@xxxxxxxxxxxxxxxxxx>
Cc: Balbir Singh <bsingharora@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
security/integrity/ima/ima_queue.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
diff -puN security/integrity/ima/ima_queue.c~ima-permit-duplicate-measurement-list-entries security/integrity/ima/ima_queue.c
--- a/security/integrity/ima/ima_queue.c~ima-permit-duplicate-measurement-list-entries
+++ a/security/integrity/ima/ima_queue.c
@@ -65,11 +65,12 @@ static struct ima_queue_entry *ima_looku
}
/* ima_add_template_entry helper function:
- * - Add template entry to measurement list and hash table.
+ * - Add template entry to the measurement list and hash table, for
+ * all entries except those carried across kexec.
*
* (Called with ima_extend_list_mutex held.)
*/
-static int ima_add_digest_entry(struct ima_template_entry *entry)
+static int ima_add_digest_entry(struct ima_template_entry *entry, int flags)
{
struct ima_queue_entry *qe;
unsigned int key;
@@ -85,8 +86,10 @@ static int ima_add_digest_entry(struct i
list_add_tail_rcu(&qe->later, &ima_measurements);
atomic_long_inc(&ima_htable.len);
- key = ima_hash_key(entry->digest);
- hlist_add_head_rcu(&qe->hnext, &ima_htable.queue[key]);
+ if (flags) {
+ key = ima_hash_key(entry->digest);
+ hlist_add_head_rcu(&qe->hnext, &ima_htable.queue[key]);
+ }
return 0;
}
@@ -126,7 +129,7 @@ int ima_add_template_entry(struct ima_te
}
}
- result = ima_add_digest_entry(entry);
+ result = ima_add_digest_entry(entry, 1);
if (result < 0) {
audit_cause = "ENOMEM";
audit_info = 0;
@@ -155,7 +158,7 @@ int ima_restore_measurement_entry(struct
int result = 0;
mutex_lock(&ima_extend_list_mutex);
- result = ima_add_digest_entry(entry);
+ result = ima_add_digest_entry(entry, 0);
mutex_unlock(&ima_extend_list_mutex);
return result;
}
_
Patches currently in -mm which might be from zohar@xxxxxxxxxxxxxxxxxx are
ima-on-soft-reboot-restore-the-measurement-list.patch
ima-permit-duplicate-measurement-list-entries.patch
ima-maintain-memory-size-needed-for-serializing-the-measurement-list.patch
ima-serialize-the-binary_runtime_measurements.patch
ima-store-the-builtin-custom-template-definitions-in-a-list.patch
ima-support-restoring-multiple-template-formats.patch
ima-define-a-canonical-binary_runtime_measurements-list-format.patch
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