linux-kernel - [PATCH 4.19 24/38] ipmi: bail out if init_srcu

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Date:   Mon, 27 Dec 2021 16:31:01 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Thadeu Lima de Souza Cascardo <cascardo@...onical.com>,
        Corey Minyard <cminyard@...sta.com>
Subject: [PATCH 4.19 24/38] ipmi: bail out if init_srcu_struct fails

From: Thadeu Lima de Souza Cascardo <cascardo@...onical.com>

commit 2b5160b12091285c5aca45980f100a9294af7b04 upstream.

In case, init_srcu_struct fails (because of memory allocation failure), we
might proceed with the driver initialization despite srcu_struct not being
entirely initialized.

Fixes: 913a89f009d9 ("ipmi: Don't initialize anything in the core until something uses it")
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@...onical.com>
Cc: Corey Minyard <cminyard@...sta.com>
Cc: stable@...r.kernel.org
Message-Id: <20211217154410.1228673-1-cascardo@...onical.com>
Signed-off-by: Corey Minyard <cminyard@...sta.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/char/ipmi/ipmi_msghandler.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -5085,7 +5085,9 @@ static int ipmi_init_msghandler(void)
 	if (initialized)
 		goto out;
 
-	init_srcu_struct(&ipmi_interfaces_srcu);
+	rv = init_srcu_struct(&ipmi_interfaces_srcu);
+	if (rv)
+		goto out;
 
 	timer_setup(&ipmi_timer, ipmi_timeout, 0);
 	mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);