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| author |   Nicholas Bellinger <nab@linux-iscsi.org> | 2013-02-18 18:31:37 -0800 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-02-18 18:47:28 -0800 |
| commit | fbbf8555a986ed31e54f006b6cc637ea4ff1425b (patch) | |
| tree | 5e95a54ec56f9470b8269dd73b1ccff3d4653ef9 /drivers/target/target_core_fabric_configfs.c | |
| parent | target: Fix lookup of dynamic NodeACLs during cached demo-mode operation (diff) | |
| download | linux-dev-fbbf8555a986ed31e54f006b6cc637ea4ff1425b.tar.xz linux-dev-fbbf8555a986ed31e54f006b6cc637ea4ff1425b.zip | |
target: Add missing mapped_lun bounds checking during make_mappedlun setup
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>
Cc: <stable@vger.kernel.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/target_core_fabric_configfs.c')
| -rw-r--r-- | drivers/target/target_core_fabric_configfs.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/target/target_core_fabric_configfs.c b/drivers/target/target_core_fabric_configfs.c index b932653358dd..04c775cb3e65 100644 --- 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_fabric_make_mappedlun( 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); |