linux-kernel - [PATCH] ACPI: scan: Fix a memory leak in an error handling path

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Message-Id: <63bf4e87eb42fa3fff2cd87eb605ebcc01f4b2f7.1620458525.git.christophe.jaillet@wanadoo.fr>
Date:   Sat,  8 May 2021 09:23:09 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     rjw@...ysocki.net, lenb@...nel.org,
        andriy.shevchenko@...ux.intel.com
Cc:     linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] ACPI: scan: Fix a memory leak in an error handling path

If 'acpi_device_set_name()' fails, we must free
'acpi_device_bus_id->bus_id' or there is a (potential) memory leak.

Fixes: eb50aaf960e3 ("ACPI: scan: Use unique number for instance_no")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/acpi/scan.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index a22778e880c2..651a431e2bbf 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -700,6 +700,7 @@ int acpi_device_add(struct acpi_device *device,
 
 		result = acpi_device_set_name(device, acpi_device_bus_id);
 		if (result) {
+			kfree_const(acpi_device_bus_id->bus_id);
 			kfree(acpi_device_bus_id);
 			goto err_unlock;
 		}
-- 
2.30.2