From: Thadeu Lima de Souza Cascardo cascardo@canonical.com
stable inclusion from linux-4.19.223 commit eb84855d3e8799b67cdbadc7a5c53997cbfc3580
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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@canonical.com Cc: Corey Minyard cminyard@mvista.com Cc: Ioanna Alifieraki ioanna-maria.alifieraki@canonical.com Cc: stable@vger.kernel.org Message-Id: 20211217154410.1228673-2-cascardo@canonical.com Signed-off-by: Corey Minyard cminyard@mvista.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Yongqiang Liu liuyongqiang13@huawei.com Signed-off-by: Laibin Qiu qiulaibin@huawei.com --- drivers/char/ipmi/ipmi_msghandler.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c index 9b66afeb1237..83eaab66d2f6 100644 --- a/drivers/char/ipmi/ipmi_msghandler.c +++ b/drivers/char/ipmi/ipmi_msghandler.c @@ -5087,20 +5087,23 @@ 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;