linux-kernel - [PATCH 5.19 052/207] gpio: mockup: Fix potential resource leakage when register a chip

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Date:   Mon, 26 Sep 2022 12:10:41 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Bartosz Golaszewski <brgl@...ev.pl>
Subject: [PATCH 5.19 052/207] gpio: mockup: Fix potential resource leakage when register a chip

From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

commit 02743c4091ccfb246f5cdbbe3f44b152d5d12933 upstream.

If creation of software node fails, the locally allocated string
array is left unfreed. Free it on error path.

Fixes: 6fda593f3082 ("gpio: mockup: Convert to use software nodes")
Cc: stable@...r.kernel.org
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Signed-off-by: Bartosz Golaszewski <brgl@...ev.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/gpio/gpio-mockup.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/gpio/gpio-mockup.c
+++ b/drivers/gpio/gpio-mockup.c
@@ -533,8 +533,10 @@ static int __init gpio_mockup_register_c
 	}
 
 	fwnode = fwnode_create_software_node(properties, NULL);
-	if (IS_ERR(fwnode))
+	if (IS_ERR(fwnode)) {
+		kfree_strarray(line_names, ngpio);
 		return PTR_ERR(fwnode);
+	}
 
 	pdevinfo.name = "gpio-mockup";
 	pdevinfo.id = idx;