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target: fix buffer offset in core_scsi3_pri_read_full_status

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When at least two initiators register pr on the same LUN,
the target returns the exception data due to buffer offset
error, therefore the initiator executes command 'sg_persist -s'
may cause the initiator to appear segfault error.

This fixes a regression originally introduced by:

  commit a85d667e58
  Author: Bart Van Assche <bart.vanassche@sandisk.com>
  Date:   Tue May 23 16:48:27 2017 -0700

      target: Use {get,put}_unaligned_be*() instead of open coding these functions

Signed-off-by: tangwenji <tang.wenji@zte.com.cn>
Cc: stable@vger.kernel.org # 4.13+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
tangwenji 2017-08-17 19:51:54 +08:00 committed by Nicholas Bellinger
parent 88fb2fa7db
commit c58a252beb
1 changed files with 1 additions and 0 deletions
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drivers/target/target_core_pr.c
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@ -4011,6 +4011,7 @@ core_scsi3_pri_read_full_status(struct se_cmd *cmd)
* Set the ADDITIONAL DESCRIPTOR LENGTH
*/
put_unaligned_be32(desc_len, &buf[off]);
off += 4;
/*
* Size of full desctipor header minus TransportID
* containing $FABRIC_MOD specific) initiator device/port