diff options
| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2016-01-19 16:15:27 -0800 |
|---|---|---|
| committer | Luis Henriques <luis.henriques@canonical.com> | 2016-02-02 19:10:05 +0000 |
| commit | 035d3e188204b453ac84c9a3601ef8357ffd3881 (patch) | |
| tree | f82d22191d1011058c8b2858b8c45a7a691218b7 /include/linux/pm_clock.h | |
| parent | d6a67e5f62622f54fa6aac506fe168bf0cfde6ea (diff) | |
iscsi-target: Fix potential dead-lock during node acl delete
commit 26a99c19f810b2593410899a5b304b21b47428a6 upstream.
This patch is a iscsi-target specific bug-fix for a dead-lock
that can occur during explicit struct se_node_acl->acl_group
se_session deletion via configfs rmdir(2), when iscsi-target
time2retain timer is still active.
It changes iscsi-target to obtain se_portal_group->session_lock
internally using spin_in_locked() to check for the specific
se_node_acl configfs shutdown rmdir(2) case.
Note this patch is intended for stable, and the subsequent
v4.5-rc patch converts target_core_tpg.c to use proper
se_sess->sess_kref reference counting for both se_node_acl
deletion + se_node_acl->queue_depth se_session restart.
Reported-by:: Sagi Grimberg <sagig@mellanox.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Andy Grover <agrover@redhat.com>
Cc: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Diffstat (limited to 'include/linux/pm_clock.h')
0 files changed, 0 insertions, 0 deletions