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| author | Wenwen Wang <wenwen@cs.uga.edu> | 2019-08-20 22:44:19 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-05 12:30:26 +0200 |
| commit | 9118efffc1e9ff1cacaaebfbe6272bd84bfc4cdf (patch) | |
| tree | 552bbef5994fac9665b71c38db0f0071e6d83bf6 /drivers/acpi | |
| parent | 5c12dadcbef8cd55ef1f5dac799bfcbb7ea7db1d (diff) | |
ACPI / PCI: fix acpi_pci_irq_enable() memory leak
[ Upstream commit 29b49958cf73b439b17fa29e9a25210809a6c01c ]
In acpi_pci_irq_enable(), 'entry' is allocated by kzalloc() in
acpi_pci_irq_check_entry() (invoked from 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.
Fixes: e237a5518425 ("x86/ACPI/PCI: Recognize that Interrupt Line 255 means "not connected"")
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/pci_irq.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c index c576a6fe4ebb..94ded9513c73 100644 --- a/drivers/acpi/pci_irq.c +++ b/drivers/acpi/pci_irq.c @@ -462,8 +462,10 @@ 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", |