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integrity: add measured_pcrs field to integrity cache

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To keep track of which measurements have been extended to which PCRs, this
patch defines a new integrity_iint_cache field named measured_pcrs. This
field is a bitmask of the PCRs measured. Each bit corresponds to a PCR
index. For example, bit 10 corresponds to PCR 10.

Signed-off-by: Eric Richter <erichte@linux.vnet.ibm.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
This commit is contained in:
Eric Richter 2016-06-01 13:14:00 -05:00 committed by Mimi Zohar
parent f786b75209
commit 96d450bbec
2 changed files with 3 additions and 0 deletions
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2
security/integrity/iint.c
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@ -79,6 +79,7 @@ static void iint_free(struct integrity_iint_cache *iint)
iint->ima_bprm_status = INTEGRITY_UNKNOWN;
iint->ima_read_status = INTEGRITY_UNKNOWN;
iint->evm_status = INTEGRITY_UNKNOWN;
iint->measured_pcrs = 0;
kmem_cache_free(iint_cache, iint);
}
@ -159,6 +160,7 @@ static void init_once(void *foo)
iint->ima_bprm_status = INTEGRITY_UNKNOWN;
iint->ima_read_status = INTEGRITY_UNKNOWN;
iint->evm_status = INTEGRITY_UNKNOWN;
iint->measured_pcrs = 0;
}
static int __init integrity_iintcache_init(void)

1
security/integrity/integrity.h
View File

@ -103,6 +103,7 @@ struct integrity_iint_cache {
struct inode *inode; /* back pointer to inode in question */
u64 version; /* track inode changes */
unsigned long flags;
unsigned long measured_pcrs;
enum integrity_status ima_file_status:4;
enum integrity_status ima_mmap_status:4;
enum integrity_status ima_bprm_status:4;