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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2016-01-20 03:15:27 +0300 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2016-01-20 12:33:55 +0300 |
| commit | 26a99c19f810b2593410899a5b304b21b47428a6 (patch) | |
| tree | 50cac8c52b719b753b30c5d275bc803d44e07049 /include/target | |
| parent | f246c941549c715a66a4477c3053569b2f5b8823 (diff) | |
| download | linux-26a99c19f810b2593410899a5b304b21b47428a6.tar.xz | |
iscsi-target: Fix potential dead-lock during node acl delete
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>
Cc: stable@vger.kernel.org # 3.10+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'include/target')
0 files changed, 0 insertions, 0 deletions