From 1b5bd0f5c6436b93b420b729030e9590d9ddbf16 Mon Sep 17 00:00:00 2001 From: Wenwen Wang Date: Tue, 20 Aug 2019 22:44:19 -0500 Subject: [PATCH] ACPI / PCI: fix acpi_pci_irq_enable() memory leak BugLink: https://bugs.launchpad.net/bugs/1848046 [ 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 Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin Signed-off-by: Paolo Pisati Signed-off-by: Kleber Sacilotto de Souza --- 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 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", -- 2.39.5