This is a note to let you know that I've just added the patch titled
target: Add missing mapped_lun bounds checking during make_mappedlun setup
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
target-add-missing-mapped_lun-bounds-checking-during-make_mappedlun-setup.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From fbbf8555a986ed31e54f006b6cc637ea4ff1425b Mon Sep 17 00:00:00 2001
From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Date: Mon, 18 Feb 2013 18:31:37 -0800
Subject: target: Add missing mapped_lun bounds checking during make_mappedlun setup
From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
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@xxxxxxx>
Cc: Jan Engelhardt <jengelh@xxxxxxx>
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/target/target_core_fabric_configfs.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/drivers/target/target_core_fabric_configfs.c
+++ b/drivers/target/target_core_fabric_configfs.c
@@ -356,6 +356,14 @@ static struct config_group *target_fabri
ret = -EINVAL;
goto out;
}
+ if (mapped_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
+ pr_err("Mapped LUN: %lu exceeds TRANSPORT_MAX_LUNS_PER_TPG"
+ "-1: %u for Target Portal Group: %u\n", mapped_lun,
+ TRANSPORT_MAX_LUNS_PER_TPG-1,
+ se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg));
+ ret = -EINVAL;
+ goto out;
+ }
lacl = core_dev_init_initiator_node_lun_acl(se_tpg, se_nacl,
mapped_lun, &ret);
Patches currently in stable-queue which might be from nab@xxxxxxxxxxxxxxx are
queue-3.4/target-fix-lookup-of-dynamic-nodeacls-during-cached-demo-mode-operation.patch
queue-3.4/target-add-missing-mapped_lun-bounds-checking-during-make_mappedlun-setup.patch
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