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scsi: fix off-by-one LUN check in scsi_scan_host_selected() 

The Scsi_Host structure max_lun field is the maximum allowed LUN plus 1. So
a LUN value is invalid if >= max_lun.

Signed-off-by: Mark Knibbs <markk@clara.co.uk>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Mark Knibbs 2014-10-09 12:39:48 +01:00 committed by Christoph Hellwig
parent fb0d82f491
commit 605c6dbef7
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/scsi_scan.c
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@ -1727,7 +1727,7 @@ int scsi_scan_host_selected(struct Scsi_Host *shost, unsigned int channel,
if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
((lun != SCAN_WILD_CARD) && (lun >= shost->max_lun)))
return -EINVAL;
mutex_lock(&shost->scan_mutex);