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| author | Wenwen Wang <wenwen@cs.uga.edu> | 2019-08-21 06:44:19 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-09-03 10:41:25 +0300 |
| commit | 29b49958cf73b439b17fa29e9a25210809a6c01c (patch) | |
| tree | e97415da3b81b4d0da46845cb2de41948d0612fa /drivers/acpi/pci_irq.c | |
| parent | 8698fab1c69a7265282d6b2ac081122e94d72cf8 (diff) | |
| download | linux-29b49958cf73b439b17fa29e9a25210809a6c01c.tar.xz | |
ACPI / PCI: fix acpi_pci_irq_enable() memory leak
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>
Diffstat (limited to 'drivers/acpi/pci_irq.c')
| -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 d2549ae65e1b..dea8a60e18a4 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", |