[PATCH/RFC] audit: improve GID/EGID comparation logic
It is useful to extend GID/EGID comparation logic to be able to
match not only the exact EID/EGID values but the group/egroup also.
Signed-off-by: Matvejchikov Ilya <matvejchikov(a)gmail.com>
---
kernel/auditsc.c | 14 ++++++++++++++
1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 47b7fc1..a233faf 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -491,9 +491,23 @@ static int audit_filter_rules(struct task_struct *tsk,
break;
case AUDIT_GID:
result = audit_comparator(cred->gid, f->op, f->val);
+ if (f->op == Audit_equal) {
+ if (!result)
+ result = in_group_p((gid_t)f->val);
+ } else if (f->op == Audit_not_equal) {
+ if (result)
+ result = !in_group_p((gid_t)f->val);
+ }
break;
case AUDIT_EGID:
result = audit_comparator(cred->egid, f->op, f->val);
+ if (f->op == Audit_equal) {
+ if (!result)
+ result = in_egroup_p((gid_t)f->val);
+ } else if (f->op == Audit_not_equal) {
+ if (result)
+ result = !in_egroup_p((gid_t)f->val);
+ }
break;
case AUDIT_SGID:
result = audit_comparator(cred->sgid, f->op, f->val);
--
1.7.3.4