From 0ddee50e3f22964864b1a5f3cc632dd306ed1060 Mon Sep 17 00:00:00 2001 From: Jitendra Bhivare Date: Fri, 24 Mar 2017 14:11:47 +0530 Subject: [PATCH] scsi: be2iscsi: Check size before copying ASYNC handle Data in buffers are gathered into a single buffer before giving to iSCSI layer. Though less likely to have payload more than 8K in ASYNC PDU, the data length is provide by FW and check is missing for overrun. Signed-off-by: Jitendra Bhivare Reviewed-by: Tomas Henzl Reviewed-by: Chris Leech Signed-off-by: Martin K. Petersen --- drivers/scsi/be2iscsi/be_main.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c index ee1f1c4e910e..4b668c4418d1 100644 --- a/drivers/scsi/be2iscsi/be_main.c +++ b/drivers/scsi/be2iscsi/be_main.c @@ -1611,6 +1611,10 @@ beiscsi_hdl_fwd_pdu(struct beiscsi_conn *beiscsi_conn, dlen = pasync_handle->buffer_len; continue; } + if (!pasync_handle->buffer_len || + (dlen + pasync_handle->buffer_len) > + pasync_ctx->async_data.buffer_size) + break; memcpy(pdata + dlen, pasync_handle->pbuffer, pasync_handle->buffer_len); dlen += pasync_handle->buffer_len; @@ -1619,8 +1623,9 @@ beiscsi_hdl_fwd_pdu(struct beiscsi_conn *beiscsi_conn, if (!plast_handle->is_final) { /* last handle should have final PDU notification from FW */ beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_ISCSI, - "BM_%d : cid %u %p fwd async PDU with last handle missing - HL%u:DN%u:DR%u\n", + "BM_%d : cid %u %p fwd async PDU opcode %x with last handle missing - HL%u:DN%u:DR%u\n", beiscsi_conn->beiscsi_conn_cid, plast_handle, + AMAP_GET_BITS(struct amap_pdu_base, opcode, phdr), pasync_ctx->async_entry[cri].wq.hdr_len, pasync_ctx->async_entry[cri].wq.bytes_needed, pasync_ctx->async_entry[cri].wq.bytes_received); -- 2.39.5