From: Wenwen Wang <wenwen@cs.uga.edu>
To: Wenwen Wang <wenwen@cs.uga.edu>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Len Brown <lenb@kernel.org>,
linux-pci@vger.kernel.org (open list:PCI SUBSYSTEM),
linux-acpi@vger.kernel.org (open list:ACPI),
linux-kernel@vger.kernel.org (open list)
Subject: [PATCH] ACPI / PCI: fix a memory leak bug
Date: Thu, 15 Aug 2019 23:33:22 -0500 [thread overview]
Message-ID: <1565930002-5524-1-git-send-email-wenwen@cs.uga.edu> (raw)
In acpi_pci_irq_enable(), 'entry' is allocated by invoking
acpi_pci_irq_lookup(). However, it is not deallocated if
acpi_pci_irq_valid() returns false, leading to a memory leak. To fix this
issue, free 'entry' before returning 0.
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
---
drivers/acpi/pci_irq.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index d2549ae..dea8a60 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -449,8 +449,10 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
* No IRQ known to the ACPI subsystem - maybe the BIOS /
* driver reported one, then use it. Exit in any case.
*/
- if (!acpi_pci_irq_valid(dev, pin))
+ if (!acpi_pci_irq_valid(dev, pin)) {
+ kfree(entry);
return 0;
+ }
if (acpi_isa_register_gsi(dev))
dev_warn(&dev->dev, "PCI INT %c: no GSI\n",
--
2.7.4
next reply other threads:[~2019-08-16 4:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-16 4:33 Wenwen Wang [this message]
2019-08-19 21:23 ` [PATCH] ACPI / PCI: fix a memory leak bug Bjorn Helgaas
2019-08-21 3:31 ` Wenwen Wang
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