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arcnet: Add NULL check in com20020pci_probe()

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[ Upstream commit fda8c491db ]

devm_kasprintf() returns NULL when memory allocation fails. Currently,
com20020pci_probe() does not check for this case, which results in a
NULL pointer dereference.

Add NULL check after devm_kasprintf() to prevent this issue and ensure
no resources are left allocated.

Fixes: 6b17a597fc ("arcnet: restoring support for multiple Sohard Arcnet cards")
Signed-off-by: Henry Martin <bsdhenrymartin@gmail.com>
Link: https://patch.msgid.link/20250402135036.44697-1-bsdhenrymartin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Henry Martin
2025-04-02 21:50:36 +08:00
committed by Greg Kroah-Hartman
parent b4513ad0f3
commit ef8b29398e
1 changed files with 16 additions and 1 deletions
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drivers/net/arcnet/com20020-pci.c
+16 -1
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@@ -250,18 +250,33 @@ static int com20020pci_probe(struct pci_dev *pdev,
card->tx_led.default_trigger = devm_kasprintf(&pdev->dev,
GFP_KERNEL, "arc%d-%d-tx",
dev->dev_id, i);
if (!card->tx_led.default_trigger) {
ret = -ENOMEM;
goto err_free_arcdev;
}
card->tx_led.name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
"pci:green:tx:%d-%d",
dev->dev_id, i);
if (!card->tx_led.name) {
ret = -ENOMEM;
goto err_free_arcdev;
}
card->tx_led.dev = &dev->dev;
card->recon_led.brightness_set = led_recon_set;
card->recon_led.default_trigger = devm_kasprintf(&pdev->dev,
GFP_KERNEL, "arc%d-%d-recon",
dev->dev_id, i);
if (!card->recon_led.default_trigger) {
ret = -ENOMEM;
goto err_free_arcdev;
}
card->recon_led.name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
"pci:red:recon:%d-%d",
dev->dev_id, i);
if (!card->recon_led.name) {
ret = -ENOMEM;
goto err_free_arcdev;
}
card->recon_led.dev = &dev->dev;
ret = devm_led_classdev_register(&pdev->dev, &card->tx_led);