| From | Greg Kroah-Hartman <> | Subject | [ 28/77] target: Add missing mapped_lun bounds checking during make_mappedlun setup | Date | Fri, 1 Mar 2013 11:44:13 -0800 |
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3.8-stable review patch. If anyone has any objections, please let me know.
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From: Nicholas Bellinger <nab@linux-iscsi.org>
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 | 8 ++++++++ 1 file changed, 8 insertions(+)
--- a/drivers/target/target_core_fabric_configfs.c +++ b/drivers/target/target_core_fabric_configfs.c @@ -354,6 +354,14 @@ 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);
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