target: Add missing mapped_lun bounds checking during make_mappedlun setup
authorNicholas Bellinger <nab@linux-iscsi.org>
Tue, 19 Feb 2013 02:31:37 +0000 (18:31 -0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sun, 3 Mar 2013 22:06:39 +0000 (06:06 +0800)
commit316857e5fe5391057d5a05f215e01d0deff7c473
tree0e701551c2631af261b632b407c0d2c5577b79fb
parent3fa4f7261d75cb6b35fdf8d329f5fd64e7354c58
target: Add missing mapped_lun bounds checking during make_mappedlun setup

commit fbbf8555a986ed31e54f006b6cc637ea4ff1425b upstream.

This patch adds missing bounds checking for the configfs provided
mapped_lun value during target_fabric_make_mappedlun() setup ahead
of se_lun_acl initialization.

This addresses a potential OOPs when using a mapped_lun value that
exceeds the hardcoded TRANSPORT_MAX_LUNS_PER_TPG-1 value within
se_node_acl->device_list[].

Reported-by: Jan Engelhardt <jengelh@inai.de>
Cc: Jan Engelhardt <jengelh@inai.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/target/target_core_fabric_configfs.c