This is a note to let you know that I've just added the patch titled
ipmi: fix initialization when workqueue allocation fails
to the 5.15-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:
ipmi-fix-initialization-when-workqueue-allocation-fails.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 75d70d76cb7b927cace2cb34265d68ebb3306b13 Mon Sep 17 00:00:00 2001
From: Thadeu Lima de Souza Cascardo <cascardo@xxxxxxxxxxxxx>
Date: Fri, 17 Dec 2021 12:44:10 -0300
Subject: ipmi: fix initialization when workqueue allocation fails
From: Thadeu Lima de Souza Cascardo <cascardo@xxxxxxxxxxxxx>
commit 75d70d76cb7b927cace2cb34265d68ebb3306b13 upstream.
If the workqueue allocation fails, the driver is marked as not initialized,
and timer and panic_notifier will be left registered.
Instead of removing those when workqueue allocation fails, do the workqueue
initialization before doing it, and cleanup srcu_struct if it fails.
Fixes: 1d49eb91e86e ("ipmi: Move remove_work to dedicated workqueue")
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@xxxxxxxxxxxxx>
Cc: Corey Minyard <cminyard@xxxxxxxxxx>
Cc: Ioanna Alifieraki <ioanna-maria.alifieraki@xxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Message-Id: <20211217154410.1228673-2-cascardo@xxxxxxxxxxxxx>
Signed-off-by: Corey Minyard <cminyard@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/char/ipmi/ipmi_msghandler.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -5152,20 +5152,23 @@ static int ipmi_init_msghandler(void)
if (rv)
goto out;
- timer_setup(&ipmi_timer, ipmi_timeout, 0);
- mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
-
- atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
-
remove_work_wq = create_singlethread_workqueue("ipmi-msghandler-remove-wq");
if (!remove_work_wq) {
pr_err("unable to create ipmi-msghandler-remove-wq workqueue");
rv = -ENOMEM;
- goto out;
+ goto out_wq;
}
+ timer_setup(&ipmi_timer, ipmi_timeout, 0);
+ mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
+
+ atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
+
initialized = true;
+out_wq:
+ if (rv)
+ cleanup_srcu_struct(&ipmi_interfaces_srcu);
out:
mutex_unlock(&ipmi_interfaces_mutex);
return rv;
Patches currently in stable-queue which might be from cascardo@xxxxxxxxxxxxx are
queue-5.15/ipmi-fix-initialization-when-workqueue-allocation-fails.patch
queue-5.15/ipmi-bail-out-if-init_srcu_struct-fails.patch
