From: Matvejchikov Ilya <matvejchikov@gmail.com>
Date: Tue, 13 Dec 2011 20:09:08 +0000 (+0300)
Subject: audit: improve GID/EGID comparation logic
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=37eebe39c9731a76535f08de455db97eb93894ae;p=linux-beck.git

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@gmail.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
---

diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index a371f857a0a9..77c705c302f7 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -633,9 +633,23 @@ static int audit_filter_rules(struct task_struct *tsk,
 			break;
 		case AUDIT_GID:
 			result = audit_gid_comparator(cred->gid, f->op, f->gid);
+			if (f->op == Audit_equal) {
+				if (!result)
+					result = in_group_p(f->gid);
+			} else if (f->op == Audit_not_equal) {
+				if (result)
+					result = !in_group_p(f->gid);
+			}
 			break;
 		case AUDIT_EGID:
 			result = audit_gid_comparator(cred->egid, f->op, f->gid);
+			if (f->op == Audit_equal) {
+				if (!result)
+					result = in_egroup_p(f->gid);
+			} else if (f->op == Audit_not_equal) {
+				if (result)
+					result = !in_egroup_p(f->gid);
+			}
 			break;
 		case AUDIT_SGID:
 			result = audit_gid_comparator(cred->sgid, f->op, f->gid);