diff options
Diffstat (limited to 'security/integrity/ima/ima_main.c')
| -rw-r--r-- | security/integrity/ima/ima_main.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c index 68b26c340acd..596ef616ac21 100644 --- a/security/integrity/ima/ima_main.c +++ b/security/integrity/ima/ima_main.c @@ -125,6 +125,7 @@ static void ima_check_last_writer(struct integrity_iint_cache *iint, if ((iint->version != inode->i_version) || (iint->flags & IMA_NEW_FILE)) { iint->flags &= ~(IMA_DONE_MASK | IMA_NEW_FILE); + iint->measured_pcrs = 0; if (iint->flags & IMA_APPRAISE) ima_update_xattr(iint, file); } @@ -162,6 +163,7 @@ static int process_measurement(struct file *file, char *buf, loff_t size, char *pathbuf = NULL; const char *pathname = NULL; int rc = -ENOMEM, action, must_appraise; + int pcr = CONFIG_IMA_MEASURE_PCR_IDX; struct evm_ima_xattr_data *xattr_value = NULL; int xattr_len = 0; bool violation_check; @@ -174,7 +176,7 @@ static int process_measurement(struct file *file, char *buf, loff_t size, * bitmask based on the appraise/audit/measurement policy. * Included is the appraise submask. */ - action = ima_get_action(inode, mask, func); + action = ima_get_action(inode, mask, func, &pcr); violation_check = ((func == FILE_CHECK || func == MMAP_CHECK) && (ima_policy_flag & IMA_MEASURE)); if (!action && !violation_check) @@ -209,7 +211,11 @@ static int process_measurement(struct file *file, char *buf, loff_t size, */ iint->flags |= action; action &= IMA_DO_MASK; - action &= ~((iint->flags & IMA_DONE_MASK) >> 1); + action &= ~((iint->flags & (IMA_DONE_MASK ^ IMA_MEASURED)) >> 1); + + /* If target pcr is already measured, unset IMA_MEASURE action */ + if ((action & IMA_MEASURE) && (iint->measured_pcrs & (0x1 << pcr))) + action ^= IMA_MEASURE; /* Nothing to do, just return existing appraised status */ if (!action) { @@ -238,7 +244,7 @@ static int process_measurement(struct file *file, char *buf, loff_t size, if (action & IMA_MEASURE) ima_store_measurement(iint, file, pathname, - xattr_value, xattr_len); + xattr_value, xattr_len, pcr); if (action & IMA_APPRAISE_SUBMASK) rc = ima_appraise_measurement(func, iint, file, pathname, xattr_value, xattr_len, opened); |