This adds the ability to audit the actions of children of a not-yet-running
process.
This is a split-out of a heavily modified version of a patch originally
submitted by Eric Paris with some ideas from Peter Moody.
Cc: Peter Moody <pe...@hda3.com>
Cc: Eric Paris <epa...@redhat.com>
Signed-off-by: Richard Guy Briggs <r...@redhat.com>
---
include/uapi/linux/audit.h | 1 +
kernel/auditfilter.c | 5 +++++
kernel/auditsc.c | 11 +++++++++++
3 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h
index e2ca600..55a8dec 100644
--- a/include/uapi/linux/audit.h
+++ b/include/uapi/linux/audit.h
@@ -267,6 +267,7 @@
#define AUDIT_OBJ_GID 110
#define AUDIT_FIELD_COMPARE 111
#define AUDIT_EXE 112
+#define AUDIT_EXE_CHILDREN 113
#define AUDIT_ARG0 200
#define AUDIT_ARG1 (AUDIT_ARG0+1)
diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index c662638..802f0cc 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -406,6 +406,7 @@ static int audit_field_valid(struct audit_entry *entry,
struct audit_field *f)
return -EINVAL;
break;
case AUDIT_EXE:
+ case AUDIT_EXE_CHILDREN:
if (f->op != Audit_equal)
return -EINVAL;
if (entry->rule.listnr != AUDIT_FILTER_EXIT)
@@ -547,6 +548,7 @@ static struct audit_entry *audit_data_to_entry(struct
audit_rule_data *data,
entry->rule.filterkey = str;
break;
case AUDIT_EXE:
+ case AUDIT_EXE_CHILDREN:
if (entry->rule.exe || f->val > PATH_MAX)
goto exit_free;
str = audit_unpack_string(&bufp, &remain, f->val);
@@ -643,6 +645,7 @@ static struct audit_rule_data *audit_krule_to_data(struct
audit_krule *krule)
audit_pack_string(&bufp, krule->filterkey);
break;
case AUDIT_EXE:
+ case AUDIT_EXE_CHILDREN:
data->buflen += data->values[i] =
audit_pack_string(&bufp,
audit_mark_path(krule->exe));
break;
@@ -710,6 +713,7 @@ static int audit_compare_rule(struct audit_krule *a, struct
audit_krule *b)
return 1;
break;
case AUDIT_EXE:
+ case AUDIT_EXE_CHILDREN:
/* both paths exist based on above type compare */
if (strcmp(audit_mark_path(a->exe),
audit_mark_path(b->exe)))
@@ -838,6 +842,7 @@ struct audit_entry *audit_dupe_rule(struct audit_krule *old)
new->filterkey = fk;
break;
case AUDIT_EXE:
+ case AUDIT_EXE_CHILDREN:
err = audit_dupe_exe(new, old);
break;
}
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index e9bac2b..4f2b515 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -469,6 +469,17 @@ static int audit_filter_rules(struct task_struct *tsk,
case AUDIT_EXE:
result = audit_exe_compare(tsk, rule->exe);
break;
+ case AUDIT_EXE_CHILDREN:
+ {
+ struct task_struct *ptsk;
+ for (ptsk = tsk; ptsk->parent->pid > 0; ptsk =
find_task_by_vpid(ptsk->parent->pid)) {
+ if (audit_exe_compare(ptsk, rule->exe)) {
+ ++result;
+ break;
+ }
+ }
+ }
+ break;
case AUDIT_UID:
result = audit_uid_comparator(cred->uid, f->op, f->uid);
break;
--
1.7.1
--
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