iser-target: Ignore non TEXT + LOGOUT opcodes for discovery
This patch adds a check in isert_rx_opcode() to ignore non TEXT + LOGOUT
opcodes when SessionType=Discovery has been negotiated.
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c
index f02bfcc..ecd1654 100644
--- a/drivers/infiniband/ulp/isert/ib_isert.c
+++ b/drivers/infiniband/ulp/isert/ib_isert.c
@@ -1066,11 +1066,19 @@
{
struct iscsi_hdr *hdr = &rx_desc->iscsi_header;
struct iscsi_conn *conn = isert_conn->conn;
+ struct iscsi_session *sess = conn->sess;
struct iscsi_cmd *cmd;
struct isert_cmd *isert_cmd;
int ret = -EINVAL;
u8 opcode = (hdr->opcode & ISCSI_OPCODE_MASK);
+ if (sess->sess_ops->SessionType &&
+ (!(opcode & ISCSI_OP_TEXT) || !(opcode & ISCSI_OP_LOGOUT))) {
+ pr_err("Got illegal opcode: 0x%02x in SessionType=Discovery,"
+ " ignoring\n", opcode);
+ return 0;
+ }
+
switch (opcode) {
case ISCSI_OP_SCSI_CMD:
cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);