iscsi target: fix oops when adding reject pdu

This fixes a oops due to a double list add when adding a reject PDU for
iscsit_allocate_iovecs allocation failures. The cmd has already been
added to the conn_cmd_list in iscsit_setup_scsi_cmd, so this has us call
iscsit_reject_cmd.

Note that for ERL0 the reject PDU is not actually sent, so this patch
is not completely tested. Just verified we do not oops. The problem is the
add reject functions return -1 which is returned all the way up to
iscsi_target_rx_thread which for ERL0 will drop the connection.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Cc: <stable@vger.kernel.org> # v3.10+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index d5f66be6988e9b493207f0b73fda092f06ef255f..77d64251af40451f8e897eac1813599e3ba499d0 100644 (file)
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -1181,7 +1181,7 @@ iscsit_handle_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
         * traditional iSCSI block I/O.
         */
        if (iscsit_allocate_iovecs(cmd) < 0) {
-               return iscsit_add_reject_cmd(cmd,
+               return iscsit_reject_cmd(cmd,
                                ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf);
        }
        immed_data = cmd->immediate_data;