linux-kernel - [PATCH] intel_th: Fix a resource leak in an error handling path

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Date:   Sun, 16 May 2021 10:27:43 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     alexander.shishkin@...ux.intel.com, gregkh@...uxfoundation.org
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] intel_th: Fix a resource leak in an error handling path

If an error occurs after calling 'pci_alloc_irq_vectors()',
'pci_free_irq_vectors()' must be called as already done in the remove
function.

Fixes: 7b7036d47c35 ("intel_th: pci: Use MSI interrupt signalling")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/hwtracing/intel_th/pci.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/hwtracing/intel_th/pci.c b/drivers/hwtracing/intel_th/pci.c
index 7da4f298ed01..fcd0aca75007 100644
--- a/drivers/hwtracing/intel_th/pci.c
+++ b/drivers/hwtracing/intel_th/pci.c
@@ -100,8 +100,10 @@ static int intel_th_pci_probe(struct pci_dev *pdev,
 		}
 
 	th = intel_th_alloc(&pdev->dev, drvdata, resource, r);
-	if (IS_ERR(th))
-		return PTR_ERR(th);
+	if (IS_ERR(th)) {
+		err = PTR_ERR(th);
+		goto err_free_irq;
+	}
 
 	th->activate   = intel_th_pci_activate;
 	th->deactivate = intel_th_pci_deactivate;
@@ -109,6 +111,10 @@ static int intel_th_pci_probe(struct pci_dev *pdev,
 	pci_set_master(pdev);
 
 	return 0;
+
+err_free_irq:
+	pci_free_irq_vectors(pdev);
+	return err;
 }
 
 static void intel_th_pci_remove(struct pci_dev *pdev)
-- 
2.30.2