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ima: Differentiate auditing policy rules from "audit" actions 

The AUDIT_INTEGRITY_RULE is used for auditing IMA policy rules and
the IMA "audit" policy action.  This patch defines
AUDIT_INTEGRITY_POLICY_RULE to reflect the IMA policy rules.

Since we defined a new message type we can now also pass the
audit_context and get an associated SYSCALL record. This now produces
the following records when parsing IMA policy's rules:

type=UNKNOWN[1807] msg=audit(1527888965.738:320): action=audit \
  func=MMAP_CHECK mask=MAY_EXEC res=1
type=UNKNOWN[1807] msg=audit(1527888965.738:320): action=audit \
  func=FILE_CHECK mask=MAY_READ res=1
type=SYSCALL msg=audit(1527888965.738:320): arch=c000003e syscall=1 \
  success=yes exit=17 a0=1 a1=55bcfcca9030 a2=11 a3=7fcc1b55fb38 \
  items=0 ppid=1567 pid=1601 auid=0 uid=0 gid=0 euid=0 suid=0 \
  fsuid=0 egid=0 sgid=0 fsgid=0 tty=tty2 ses=2 comm="echo" \
  exe="/usr/bin/echo" \
  subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null)

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
hifive-unleashed-5.1
Stefan Berger 2018-06-04 16:54:55 -04:00 committed by Mimi Zohar
parent 2afd020aae
commit dba31ee759
2 changed files with 3 additions and 2 deletions
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1
include/uapi/linux/audit.h
View File

@ -148,6 +148,7 @@
#define AUDIT_INTEGRITY_PCR 1804 /* PCR invalidation msgs */
#define AUDIT_INTEGRITY_RULE 1805 /* policy rule */
#define AUDIT_INTEGRITY_EVM_XATTR 1806 /* New EVM-covered xattr */
#define AUDIT_INTEGRITY_POLICY_RULE 1807 /* IMA policy rules */
#define AUDIT_KERNEL 2000 /* Asynchronous audit record. NOT A REQUEST. */

4
security/integrity/ima/ima_policy.c
View File

@ -681,8 +681,8 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry)
bool uid_token;
int result = 0;
ab = integrity_audit_log_start(NULL, GFP_KERNEL,
AUDIT_INTEGRITY_RULE);
ab = integrity_audit_log_start(audit_context(), GFP_KERNEL,
AUDIT_INTEGRITY_POLICY_RULE);
entry->uid = INVALID_UID;
entry->fowner = INVALID_UID;