This is a note to let you know that I've just added the patch titled
target: Fix target_release_cmd_kref shutdown comp leak
to the 4.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
target-fix-target_release_cmd_kref-shutdown-comp-leak.patch
and it can be found in the queue-4.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5e47f1985d7107331c3f64fb3ec83d66fd73577e Mon Sep 17 00:00:00 2001
From: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
Date: Mon, 14 Mar 2016 22:47:37 -0700
Subject: target: Fix target_release_cmd_kref shutdown comp leak
From: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
commit 5e47f1985d7107331c3f64fb3ec83d66fd73577e upstream.
This patch fixes an active I/O shutdown bug for fabric
drivers using target_wait_for_sess_cmds(), where se_cmd
descriptor shutdown would result in hung tasks waiting
indefinitely for se_cmd->cmd_wait_comp to complete().
To address this bug, drop the incorrect list_del_init()
usage in target_wait_for_sess_cmds() and always complete()
during se_cmd target_release_cmd_kref() put, in order to
let caller invoke the final fabric release callback
into se_cmd->se_tfo->release_cmd() code.
Reported-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
Tested-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
Signed-off-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/target/target_core_transport.c | 2 --
1 file changed, 2 deletions(-)
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -2596,8 +2596,6 @@ void target_wait_for_sess_cmds(struct se
list_for_each_entry_safe(se_cmd, tmp_cmd,
&se_sess->sess_wait_list, se_cmd_list) {
- list_del_init(&se_cmd->se_cmd_list);
-
pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:"
" %d\n", se_cmd, se_cmd->t_state,
se_cmd->se_tfo->get_cmd_state(se_cmd));
Patches currently in stable-queue which might be from himanshu.madhani@xxxxxxxxxx are
queue-4.5/target-fix-target_release_cmd_kref-shutdown-comp-leak.patch
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