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authorNicholas Bellinger <nab@linux-iscsi.org>2014-06-16 20:25:54 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-07-06 18:54:13 -0700
commit69256ce37fa37dc92680579c4e4a73f15fe79d36 (patch)
tree14b9ce97a10ba1bd64ff5b51e95f7f4ac525e30d /drivers/target
parent5e9a2a3622d30c36814ea4df359c83dde1bf53a5 (diff)
downloadlinux-linaro-stable-69256ce37fa37dc92680579c4e4a73f15fe79d36.tar.gz
target: Fix left-over se_lun->lun_sep pointer OOPs
commit 83ff42fcce070801a3aa1cd6a3269d7426271a8d upstream. This patch fixes a left-over se_lun->lun_sep pointer OOPs when one of the /sys/kernel/config/target/$FABRIC/$WWPN/$TPGT/lun/$LUN/alua* attributes is accessed after the $DEVICE symlink has been removed. To address this bug, go ahead and clear se_lun->lun_sep memory in core_dev_unexport(), so that the existing checks for show/store ALUA attributes in target_core_fabric_configfs.c work as expected. Reported-by: Sebastian Herbszt <herbszt@gmx.de> Tested-by: Sebastian Herbszt <herbszt@gmx.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/target')
-rw-r--r--drivers/target/target_core_device.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c
index 8032917b6636..68398753eb82 100644
--- a/drivers/target/target_core_device.c
+++ b/drivers/target/target_core_device.c
@@ -614,6 +614,7 @@ void core_dev_unexport(
dev->export_count--;
spin_unlock(&hba->device_lock);
+ lun->lun_sep = NULL;
lun->lun_se_dev = NULL;
}