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scsi: iscsi: Ensure sysfs attributes are limited to PAGE_SIZE 

As the iSCSI parameters are exported back through sysfs, it should be
enforcing that they never are more than PAGE_SIZE (which should be more
than enough) before accepting updates through netlink.

Change all iSCSI sysfs attributes to use sysfs_emit().

Cc: stable@vger.kernel.org
Reported-by: Adam Nichols <adam@grimm-co.com>
Reviewed-by: Lee Duncan <lduncan@suse.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Chris Leech <cleech@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Chris Leech 2021-02-23 18:00:17 -08:00 committed by Martin K. Petersen
parent 688e8128b7
commit ec98ea7070
2 changed files with 90 additions and 83 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

148
drivers/scsi/libiscsi.c
View File

@ -3430,125 +3430,125 @@ int iscsi_session_get_param(struct iscsi_cls_session *cls_session,
switch(param) {
case ISCSI_PARAM_FAST_ABORT:
len = sprintf(buf, "%d\n", session->fast_abort);
len = sysfs_emit(buf, "%d\n", session->fast_abort);
break;
case ISCSI_PARAM_ABORT_TMO:
len = sprintf(buf, "%d\n", session->abort_timeout);
len = sysfs_emit(buf, "%d\n", session->abort_timeout);
break;
case ISCSI_PARAM_LU_RESET_TMO:
len = sprintf(buf, "%d\n", session->lu_reset_timeout);
len = sysfs_emit(buf, "%d\n", session->lu_reset_timeout);
break;
case ISCSI_PARAM_TGT_RESET_TMO:
len = sprintf(buf, "%d\n", session->tgt_reset_timeout);
len = sysfs_emit(buf, "%d\n", session->tgt_reset_timeout);
break;
case ISCSI_PARAM_INITIAL_R2T_EN:
len = sprintf(buf, "%d\n", session->initial_r2t_en);
len = sysfs_emit(buf, "%d\n", session->initial_r2t_en);
break;
case ISCSI_PARAM_MAX_R2T:
len = sprintf(buf, "%hu\n", session->max_r2t);
len = sysfs_emit(buf, "%hu\n", session->max_r2t);
break;
case ISCSI_PARAM_IMM_DATA_EN:
len = sprintf(buf, "%d\n", session->imm_data_en);
len = sysfs_emit(buf, "%d\n", session->imm_data_en);
break;
case ISCSI_PARAM_FIRST_BURST:
len = sprintf(buf, "%u\n", session->first_burst);
len = sysfs_emit(buf, "%u\n", session->first_burst);
break;
case ISCSI_PARAM_MAX_BURST:
len = sprintf(buf, "%u\n", session->max_burst);
len = sysfs_emit(buf, "%u\n", session->max_burst);
break;
case ISCSI_PARAM_PDU_INORDER_EN:
len = sprintf(buf, "%d\n", session->pdu_inorder_en);
len = sysfs_emit(buf, "%d\n", session->pdu_inorder_en);
break;
case ISCSI_PARAM_DATASEQ_INORDER_EN:
len = sprintf(buf, "%d\n", session->dataseq_inorder_en);
len = sysfs_emit(buf, "%d\n", session->dataseq_inorder_en);
break;
case ISCSI_PARAM_DEF_TASKMGMT_TMO:
len = sprintf(buf, "%d\n", session->def_taskmgmt_tmo);
len = sysfs_emit(buf, "%d\n", session->def_taskmgmt_tmo);
break;
case ISCSI_PARAM_ERL:
len = sprintf(buf, "%d\n", session->erl);
len = sysfs_emit(buf, "%d\n", session->erl);
break;
case ISCSI_PARAM_TARGET_NAME:
len = sprintf(buf, "%s\n", session->targetname);
len = sysfs_emit(buf, "%s\n", session->targetname);
break;
case ISCSI_PARAM_TARGET_ALIAS:
len = sprintf(buf, "%s\n", session->targetalias);
len = sysfs_emit(buf, "%s\n", session->targetalias);
break;
case ISCSI_PARAM_TPGT:
len = sprintf(buf, "%d\n", session->tpgt);
len = sysfs_emit(buf, "%d\n", session->tpgt);
break;
case ISCSI_PARAM_USERNAME:
len = sprintf(buf, "%s\n", session->username);
len = sysfs_emit(buf, "%s\n", session->username);
break;
case ISCSI_PARAM_USERNAME_IN:
len = sprintf(buf, "%s\n", session->username_in);
len = sysfs_emit(buf, "%s\n", session->username_in);
break;
case ISCSI_PARAM_PASSWORD:
len = sprintf(buf, "%s\n", session->password);
len = sysfs_emit(buf, "%s\n", session->password);
break;
case ISCSI_PARAM_PASSWORD_IN:
len = sprintf(buf, "%s\n", session->password_in);
len = sysfs_emit(buf, "%s\n", session->password_in);
break;
case ISCSI_PARAM_IFACE_NAME:
len = sprintf(buf, "%s\n", session->ifacename);
len = sysfs_emit(buf, "%s\n", session->ifacename);
break;
case ISCSI_PARAM_INITIATOR_NAME:
len = sprintf(buf, "%s\n", session->initiatorname);
len = sysfs_emit(buf, "%s\n", session->initiatorname);
break;
case ISCSI_PARAM_BOOT_ROOT:
len = sprintf(buf, "%s\n", session->boot_root);
len = sysfs_emit(buf, "%s\n", session->boot_root);
break;
case ISCSI_PARAM_BOOT_NIC:
len = sprintf(buf, "%s\n", session->boot_nic);
len = sysfs_emit(buf, "%s\n", session->boot_nic);
break;
case ISCSI_PARAM_BOOT_TARGET:
len = sprintf(buf, "%s\n", session->boot_target);
len = sysfs_emit(buf, "%s\n", session->boot_target);
break;
case ISCSI_PARAM_AUTO_SND_TGT_DISABLE:
len = sprintf(buf, "%u\n", session->auto_snd_tgt_disable);
len = sysfs_emit(buf, "%u\n", session->auto_snd_tgt_disable);
break;
case ISCSI_PARAM_DISCOVERY_SESS:
len = sprintf(buf, "%u\n", session->discovery_sess);
len = sysfs_emit(buf, "%u\n", session->discovery_sess);
break;
case ISCSI_PARAM_PORTAL_TYPE:
len = sprintf(buf, "%s\n", session->portal_type);
len = sysfs_emit(buf, "%s\n", session->portal_type);
break;
case ISCSI_PARAM_CHAP_AUTH_EN:
len = sprintf(buf, "%u\n", session->chap_auth_en);
len = sysfs_emit(buf, "%u\n", session->chap_auth_en);
break;
case ISCSI_PARAM_DISCOVERY_LOGOUT_EN:
len = sprintf(buf, "%u\n", session->discovery_logout_en);
len = sysfs_emit(buf, "%u\n", session->discovery_logout_en);
break;
case ISCSI_PARAM_BIDI_CHAP_EN:
len = sprintf(buf, "%u\n", session->bidi_chap_en);
len = sysfs_emit(buf, "%u\n", session->bidi_chap_en);
break;
case ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL:
len = sprintf(buf, "%u\n", session->discovery_auth_optional);
len = sysfs_emit(buf, "%u\n", session->discovery_auth_optional);
break;
case ISCSI_PARAM_DEF_TIME2WAIT:
len = sprintf(buf, "%d\n", session->time2wait);
len = sysfs_emit(buf, "%d\n", session->time2wait);
break;
case ISCSI_PARAM_DEF_TIME2RETAIN:
len = sprintf(buf, "%d\n", session->time2retain);
len = sysfs_emit(buf, "%d\n", session->time2retain);
break;
case ISCSI_PARAM_TSID:
len = sprintf(buf, "%u\n", session->tsid);
len = sysfs_emit(buf, "%u\n", session->tsid);
break;
case ISCSI_PARAM_ISID:
len = sprintf(buf, "%02x%02x%02x%02x%02x%02x\n",
len = sysfs_emit(buf, "%02x%02x%02x%02x%02x%02x\n",
session->isid[0], session->isid[1],
session->isid[2], session->isid[3],
session->isid[4], session->isid[5]);
break;
case ISCSI_PARAM_DISCOVERY_PARENT_IDX:
len = sprintf(buf, "%u\n", session->discovery_parent_idx);
len = sysfs_emit(buf, "%u\n", session->discovery_parent_idx);
break;
case ISCSI_PARAM_DISCOVERY_PARENT_TYPE:
if (session->discovery_parent_type)
len = sprintf(buf, "%s\n",
len = sysfs_emit(buf, "%s\n",
session->discovery_parent_type);
else
len = sprintf(buf, "\n");
len = sysfs_emit(buf, "\n");
break;
default:
return -ENOSYS;
@ -3580,16 +3580,16 @@ int iscsi_conn_get_addr_param(struct sockaddr_storage *addr,
case ISCSI_PARAM_CONN_ADDRESS:
case ISCSI_HOST_PARAM_IPADDRESS:
if (sin)
len = sprintf(buf, "%pI4\n", &sin->sin_addr.s_addr);
len = sysfs_emit(buf, "%pI4\n", &sin->sin_addr.s_addr);
else
len = sprintf(buf, "%pI6\n", &sin6->sin6_addr);
len = sysfs_emit(buf, "%pI6\n", &sin6->sin6_addr);
break;
case ISCSI_PARAM_CONN_PORT:
case ISCSI_PARAM_LOCAL_PORT:
if (sin)
len = sprintf(buf, "%hu\n", be16_to_cpu(sin->sin_port));
len = sysfs_emit(buf, "%hu\n", be16_to_cpu(sin->sin_port));
else
len = sprintf(buf, "%hu\n",
len = sysfs_emit(buf, "%hu\n",
be16_to_cpu(sin6->sin6_port));
break;
default:
@ -3608,88 +3608,88 @@ int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
switch(param) {
case ISCSI_PARAM_PING_TMO:
len = sprintf(buf, "%u\n", conn->ping_timeout);
len = sysfs_emit(buf, "%u\n", conn->ping_timeout);
break;
case ISCSI_PARAM_RECV_TMO:
len = sprintf(buf, "%u\n", conn->recv_timeout);
len = sysfs_emit(buf, "%u\n", conn->recv_timeout);
break;
case ISCSI_PARAM_MAX_RECV_DLENGTH:
len = sprintf(buf, "%u\n", conn->max_recv_dlength);
len = sysfs_emit(buf, "%u\n", conn->max_recv_dlength);
break;
case ISCSI_PARAM_MAX_XMIT_DLENGTH:
len = sprintf(buf, "%u\n", conn->max_xmit_dlength);
len = sysfs_emit(buf, "%u\n", conn->max_xmit_dlength);
break;
case ISCSI_PARAM_HDRDGST_EN:
len = sprintf(buf, "%d\n", conn->hdrdgst_en);
len = sysfs_emit(buf, "%d\n", conn->hdrdgst_en);
break;
case ISCSI_PARAM_DATADGST_EN:
len = sprintf(buf, "%d\n", conn->datadgst_en);
len = sysfs_emit(buf, "%d\n", conn->datadgst_en);
break;
case ISCSI_PARAM_IFMARKER_EN:
len = sprintf(buf, "%d\n", conn->ifmarker_en);
len = sysfs_emit(buf, "%d\n", conn->ifmarker_en);
break;
case ISCSI_PARAM_OFMARKER_EN:
len = sprintf(buf, "%d\n", conn->ofmarker_en);
len = sysfs_emit(buf, "%d\n", conn->ofmarker_en);
break;
case ISCSI_PARAM_EXP_STATSN:
len = sprintf(buf, "%u\n", conn->exp_statsn);
len = sysfs_emit(buf, "%u\n", conn->exp_statsn);
break;
case ISCSI_PARAM_PERSISTENT_PORT:
len = sprintf(buf, "%d\n", conn->persistent_port);
len = sysfs_emit(buf, "%d\n", conn->persistent_port);
break;
case ISCSI_PARAM_PERSISTENT_ADDRESS:
len = sprintf(buf, "%s\n", conn->persistent_address);
len = sysfs_emit(buf, "%s\n", conn->persistent_address);
break;
case ISCSI_PARAM_STATSN:
len = sprintf(buf, "%u\n", conn->statsn);
len = sysfs_emit(buf, "%u\n", conn->statsn);
break;
case ISCSI_PARAM_MAX_SEGMENT_SIZE:
len = sprintf(buf, "%u\n", conn->max_segment_size);
len = sysfs_emit(buf, "%u\n", conn->max_segment_size);
break;
case ISCSI_PARAM_KEEPALIVE_TMO:
len = sprintf(buf, "%u\n", conn->keepalive_tmo);
len = sysfs_emit(buf, "%u\n", conn->keepalive_tmo);
break;
case ISCSI_PARAM_LOCAL_PORT:
len = sprintf(buf, "%u\n", conn->local_port);
len = sysfs_emit(buf, "%u\n", conn->local_port);
break;
case ISCSI_PARAM_TCP_TIMESTAMP_STAT:
len = sprintf(buf, "%u\n", conn->tcp_timestamp_stat);
len = sysfs_emit(buf, "%u\n", conn->tcp_timestamp_stat);
break;
case ISCSI_PARAM_TCP_NAGLE_DISABLE:
len = sprintf(buf, "%u\n", conn->tcp_nagle_disable);
len = sysfs_emit(buf, "%u\n", conn->tcp_nagle_disable);
break;
case ISCSI_PARAM_TCP_WSF_DISABLE:
len = sprintf(buf, "%u\n", conn->tcp_wsf_disable);
len = sysfs_emit(buf, "%u\n", conn->tcp_wsf_disable);
break;
case ISCSI_PARAM_TCP_TIMER_SCALE:
len = sprintf(buf, "%u\n", conn->tcp_timer_scale);
len = sysfs_emit(buf, "%u\n", conn->tcp_timer_scale);
break;
case ISCSI_PARAM_TCP_TIMESTAMP_EN:
len = sprintf(buf, "%u\n", conn->tcp_timestamp_en);
len = sysfs_emit(buf, "%u\n", conn->tcp_timestamp_en);
break;
case ISCSI_PARAM_IP_FRAGMENT_DISABLE:
len = sprintf(buf, "%u\n", conn->fragment_disable);
len = sysfs_emit(buf, "%u\n", conn->fragment_disable);
break;
case ISCSI_PARAM_IPV4_TOS:
len = sprintf(buf, "%u\n", conn->ipv4_tos);
len = sysfs_emit(buf, "%u\n", conn->ipv4_tos);
break;
case ISCSI_PARAM_IPV6_TC:
len = sprintf(buf, "%u\n", conn->ipv6_traffic_class);
len = sysfs_emit(buf, "%u\n", conn->ipv6_traffic_class);
break;
case ISCSI_PARAM_IPV6_FLOW_LABEL:
len = sprintf(buf, "%u\n", conn->ipv6_flow_label);
len = sysfs_emit(buf, "%u\n", conn->ipv6_flow_label);
break;
case ISCSI_PARAM_IS_FW_ASSIGNED_IPV6:
len = sprintf(buf, "%u\n", conn->is_fw_assigned_ipv6);
len = sysfs_emit(buf, "%u\n", conn->is_fw_assigned_ipv6);
break;
case ISCSI_PARAM_TCP_XMIT_WSF:
len = sprintf(buf, "%u\n", conn->tcp_xmit_wsf);
len = sysfs_emit(buf, "%u\n", conn->tcp_xmit_wsf);
break;
case ISCSI_PARAM_TCP_RECV_WSF:
len = sprintf(buf, "%u\n", conn->tcp_recv_wsf);
len = sysfs_emit(buf, "%u\n", conn->tcp_recv_wsf);
break;
case ISCSI_PARAM_LOCAL_IPADDR:
len = sprintf(buf, "%s\n", conn->local_ipaddr);
len = sysfs_emit(buf, "%s\n", conn->local_ipaddr);
break;
default:
return -ENOSYS;
@ -3707,13 +3707,13 @@ int iscsi_host_get_param(struct Scsi_Host *shost, enum iscsi_host_param param,
switch (param) {
case ISCSI_HOST_PARAM_NETDEV_NAME:
len = sprintf(buf, "%s\n", ihost->netdev);
len = sysfs_emit(buf, "%s\n", ihost->netdev);
break;
case ISCSI_HOST_PARAM_HWADDRESS:
len = sprintf(buf, "%s\n", ihost->hwaddress);
len = sysfs_emit(buf, "%s\n", ihost->hwaddress);
break;
case ISCSI_HOST_PARAM_INITIATOR_NAME:
len = sprintf(buf, "%s\n", ihost->initiatorname);
len = sysfs_emit(buf, "%s\n", ihost->initiatorname);
break;
default:
return -ENOSYS;

25
drivers/scsi/scsi_transport_iscsi.c
View File

@ -135,7 +135,8 @@ show_transport_handle(struct device *dev, struct device_attribute *attr,
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport));
return sysfs_emit(buf, "%llu\n",
(unsigned long long)iscsi_handle(priv->iscsi_transport));
}
static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
@ -145,7 +146,7 @@ show_transport_##name(struct device *dev, \
struct device_attribute *attr,char *buf) \
{ \
struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
return sprintf(buf, format"\n", priv->iscsi_transport->name); \
return sysfs_emit(buf, format"\n", priv->iscsi_transport->name);\
} \
static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
@ -186,7 +187,7 @@ static ssize_t
show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
{
struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
return sprintf(buf, "%llu\n", (unsigned long long) ep->id);
return sysfs_emit(buf, "%llu\n", (unsigned long long) ep->id);
}
static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
@ -2883,6 +2884,9 @@ iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
struct iscsi_cls_session *session;
int err = 0, value = 0;
if (ev->u.set_param.len > PAGE_SIZE)
return -EINVAL;
session = iscsi_session_lookup(ev->u.set_param.sid);
conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
if (!conn || !session)
@ -3030,6 +3034,9 @@ iscsi_set_host_param(struct iscsi_transport *transport,
if (!transport->set_host_param)
return -ENOSYS;
if (ev->u.set_host_param.len > PAGE_SIZE)
return -EINVAL;
shost = scsi_host_lookup(ev->u.set_host_param.host_no);
if (!shost) {
printk(KERN_ERR "set_host_param could not find host no %u\n",
@ -3963,7 +3970,7 @@ static ssize_t show_conn_state(struct device *dev,
conn->state < ARRAY_SIZE(connection_state_names))
state = connection_state_names[conn->state];
return sprintf(buf, "%s\n", state);
return sysfs_emit(buf, "%s\n", state);
}
static ISCSI_CLASS_ATTR(conn, state, S_IRUGO, show_conn_state,
NULL);
@ -4191,7 +4198,7 @@ show_priv_session_state(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
return sysfs_emit(buf, "%s\n", iscsi_session_state_name(session->state));
}
static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
NULL);
@ -4200,7 +4207,7 @@ show_priv_session_creator(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
return sprintf(buf, "%d\n", session->creator);
return sysfs_emit(buf, "%d\n", session->creator);
}
static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
NULL);
@ -4209,7 +4216,7 @@ show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
return sprintf(buf, "%d\n", session->target_id);
return sysfs_emit(buf, "%d\n", session->target_id);
}
static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
show_priv_session_target_id, NULL);
@ -4222,8 +4229,8 @@ show_priv_session_##field(struct device *dev, \
struct iscsi_cls_session *session = \
iscsi_dev_to_session(dev->parent); \
if (session->field == -1) \
return sprintf(buf, "off\n"); \
return sprintf(buf, format"\n", session->field); \
return sysfs_emit(buf, "off\n"); \
return sysfs_emit(buf, format"\n", session->field); \
}
#define iscsi_priv_session_attr_store(field) \