Re: [PATCH 2/2] ACPI, PCI, ISA: Fix memory leak when there is no IRQ in the ACPI subsystem.

From: Tomasz Nowicki
Date: Wed Feb 19 2014 - 05:27:23 EST


On 18.02.2014 16:26, Rafael J. Wysocki wrote:
On Tuesday, February 18, 2014 11:21:39 AM Tomasz Nowicki wrote:
On 18.02.2014 02:02, Rafael J. Wysocki wrote:
On Monday, February 10, 2014 02:00:11 PM Tomasz Nowicki wrote:
Whenever we register ISA interrupt or not, we need to free the IRQ routing
table entry.

Signed-off-by: Tomasz Nowicki <tomasz.nowicki@xxxxxxxxxx>
---
drivers/acpi/pci_irq.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index b0e31b6..6ec0f36 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -432,6 +432,7 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
#endif
dev_warn(&dev->dev, "PCI INT %c: no GSI\n", pin_name(pin));

+ kfree(entry);

If I'm not mistaken, entry is always NULL here, isn't it?

acpi_pci_link_allocate_irq() can return negative gsi even if entry !=
NULL. For that case we'd have memory leak.

And that's what your changelog should be saying, isn't it?
It should, sorry.

Queued up for 3.14 and marked for -stable. I had to rebase it, though, so
please check the result in linux-pm.git/linux-next.
It's OK. Thanks.

Tomasz
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