From 59b6986dbfcdab96a971f9663221849de79a7556 Mon Sep 17 00:00:00 2001 From: Bart Van Assche Date: Thu, 5 Jan 2017 12:39:57 +0100 Subject: target/iscsi: Fix iSCSI task reassignment handling Allocate a task management request structure for all task management requests, including task reassignment. This change avoids that the se_tmr->response assignment dereferences an uninitialized se_tmr pointer. Reported-by: Moshe David Signed-off-by: Bart Van Assche Reviewed-by: Hannes Reinecke Reviewed-by: Christoph Hellwig Cc: Moshe David Signed-off-by: Nicholas Bellinger --- drivers/target/iscsi/iscsi_target.c | 19 +++++++------------ 1 file changed, 7 insertions(+), 12 deletions(-) (limited to 'drivers/target') diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index d16729fa1f67..b4f1d1cbe521 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -1951,7 +1951,7 @@ iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, struct iscsi_tm *hdr; int out_of_order_cmdsn = 0, ret; bool sess_ref = false; - u8 function; + u8 function, tcm_function = TMR_UNKNOWN; hdr = (struct iscsi_tm *) buf; hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; @@ -1997,10 +1997,6 @@ iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, * LIO-Target $FABRIC_MOD */ if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { - - u8 tcm_function; - int ret; - transport_init_se_cmd(&cmd->se_cmd, &iscsi_ops, conn->sess->se_sess, 0, DMA_NONE, TCM_SIMPLE_TAG, cmd->sense_buffer + 2); @@ -2014,15 +2010,14 @@ iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, return iscsit_add_reject_cmd(cmd, ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); } - - ret = core_tmr_alloc_req(&cmd->se_cmd, cmd->tmr_req, - tcm_function, GFP_KERNEL); - if (ret < 0) - return iscsit_add_reject_cmd(cmd, + } + ret = core_tmr_alloc_req(&cmd->se_cmd, cmd->tmr_req, tcm_function, + GFP_KERNEL); + if (ret < 0) + return iscsit_add_reject_cmd(cmd, ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); - cmd->tmr_req->se_tmr_req = cmd->se_cmd.se_tmr_req; - } + cmd->tmr_req->se_tmr_req = cmd->se_cmd.se_tmr_req; cmd->iscsi_opcode = ISCSI_OP_SCSI_TMFUNC; cmd->i_state = ISTATE_SEND_TASKMGTRSP; -- cgit v1.2.3