linux-kernel - [PATCH] serial: 8250_lpss: Fix memory leak in lpss8250

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Date: Fri, 26 Apr 2024 14:39:59 +0100
From: lumingyindetect@....com
To: linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org
Cc: ilpo.jarvinen@...ux.intel.com,
	andriy.shevchenko@...ux.intel.com,
	gregkh@...uxfoundation.org,
	jirislaby@...nel.or,
	LuMingYin <lumingyindetect@....com>
Subject: [PATCH] serial: 8250_lpss: Fix memory leak in lpss8250_probe()

From: LuMingYin <lumingyindetect@....com>

The return statements at line 347 and line 351 in the lpss8250_probe() function result in a memory leak of the variable pdev.
Add a label named free_irq_vectors in the lpss8250_probe() function to release the memory area pointed to by pdev.
Modify the two return statements mentioned above to jump to the label "free_irq_vectors" instead.

Fixes: e88c4cfcb7b888ac374916806f86c17d8ecaeb67 ("serial: 8250_lpss: fix memory in lpss8250_probe()")

Signed-off-by: LuMingYin <lumingyindetect@....com>
---
 drivers/tty/serial/8250/8250_lpss.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_lpss.c b/drivers/tty/serial/8250/8250_lpss.c
index c3cd6cb9ac80..fa9fd4dc86c7 100644
--- a/drivers/tty/serial/8250/8250_lpss.c
+++ b/drivers/tty/serial/8250/8250_lpss.c
@@ -344,11 +344,11 @@ static int lpss8250_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	uart.port.mapbase = pci_resource_start(pdev, 0);
 	uart.port.membase = pcim_iomap(pdev, 0, 0);
 	if (!uart.port.membase)
-		return -ENOMEM;
+		goto free_irq_vectors;
 
 	ret = lpss->board->setup(lpss, &uart.port);
 	if (ret)
-		return ret;
+		goto free_irq_vectors;
 
 	dw8250_setup_port(&uart.port);
 
@@ -367,6 +367,7 @@ static int lpss8250_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 
 err_exit:
 	lpss->board->exit(lpss);
+free_irq_vectors:
 	pci_free_irq_vectors(pdev);
 	return ret;
 }
-- 
2.25.1