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authorEric W. Biederman <ebiederm@xmission.com>2012-09-10 23:10:16 -0700
committerEric W. Biederman <ebiederm@xmission.com>2012-09-17 18:03:31 -0700
commit02276bda4a2bf094fcde89fb5db4d9e86347ebf4 (patch)
tree7f06da4dd9757c353133b9c512334daf96cfec1e /kernel/auditfilter.c
parent34e36d8ecbd958bc15f8e63deade1227de337eb1 (diff)
audit: Use current instead of NETLINK_CREDS() in audit_filter
Get caller process uid and gid and pid values from the current task instead of the NETLINK_CB. This is simpler than passing NETLINK_CREDS from from audit_receive_msg to audit_filter_user_rules and avoid the chance of being hit by the occassional bugs in netlink uid/gid credential passing. This is a safe changes because all netlink requests are processed in the task of the sending process. Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Eric Paris <eparis@redhat.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'kernel/auditfilter.c')
-rw-r--r--kernel/auditfilter.c13
1 files changed, 6 insertions, 7 deletions
diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index a6c3f1abd20..b754f43bc56 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -1236,8 +1236,7 @@ int audit_compare_dname_path(const char *dname, const char *path,
return strncmp(p, dname, dlen);
}
-static int audit_filter_user_rules(struct netlink_skb_parms *cb,
- struct audit_krule *rule,
+static int audit_filter_user_rules(struct audit_krule *rule,
enum audit_state *state)
{
int i;
@@ -1249,13 +1248,13 @@ static int audit_filter_user_rules(struct netlink_skb_parms *cb,
switch (f->type) {
case AUDIT_PID:
- result = audit_comparator(cb->creds.pid, f->op, f->val);
+ result = audit_comparator(task_pid_vnr(current), f->op, f->val);
break;
case AUDIT_UID:
- result = audit_comparator(cb->creds.uid, f->op, f->val);
+ result = audit_comparator(current_uid(), f->op, f->val);
break;
case AUDIT_GID:
- result = audit_comparator(cb->creds.gid, f->op, f->val);
+ result = audit_comparator(current_gid(), f->op, f->val);
break;
case AUDIT_LOGINUID:
result = audit_comparator(audit_get_loginuid(current),
@@ -1287,7 +1286,7 @@ static int audit_filter_user_rules(struct netlink_skb_parms *cb,
return 1;
}
-int audit_filter_user(struct netlink_skb_parms *cb)
+int audit_filter_user(void)
{
enum audit_state state = AUDIT_DISABLED;
struct audit_entry *e;
@@ -1295,7 +1294,7 @@ int audit_filter_user(struct netlink_skb_parms *cb)
rcu_read_lock();
list_for_each_entry_rcu(e, &audit_filter_list[AUDIT_FILTER_USER], list) {
- if (audit_filter_user_rules(cb, &e->rule, &state)) {
+ if (audit_filter_user_rules(&e->rule, &state)) {
if (state == AUDIT_DISABLED)
ret = 0;
break;