From 122f8afcfb3fa77d05e934182242933ac60746cb Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger Date: Wed, 13 Nov 2013 14:33:24 -0800 Subject: [PATCH] iscsi-target: Reject unsupported multi PDU text command sequence This patch adds a check to reject text commands with F_BIT=0 || C_BIT=1, as multi PDU text command sequences are currently unsupported. This avoids the case where a text command received with F_BIT=0, was generating a text response with F_BIT=1 which is a protocol error according to RFC-3720 Section 10.11.1. Reported-by: Arshad Hussain Signed-off-by: Nicholas Bellinger --- drivers/target/iscsi/iscsi_target.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index ab64cbbb4976..ba9787d24c12 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -1948,6 +1948,13 @@ iscsit_setup_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, (unsigned char *)hdr); } + if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL) || + (hdr->flags & ISCSI_FLAG_TEXT_CONTINUE)) { + pr_err("Multi sequence text commands currently not supported\n"); + return iscsit_reject_cmd(cmd, ISCSI_REASON_CMD_NOT_SUPPORTED, + (unsigned char *)hdr); + } + pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x," " ExpStatSN: 0x%08x, Length: %u\n", hdr->itt, hdr->cmdsn, hdr->exp_statsn, payload_length); -- 2.20.1