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| author | Prarit Bhargava <prarit@redhat.com> | 2017-02-15 17:53:08 +0100 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-02-17 21:32:05 +0100 |
| commit | 81efbaddd687f1b478c15665716fd545e2e4401e (patch) | |
| tree | 6ce6f9c6f4c3f7db00672aa0611a8f560bfcac57 /drivers/pci/msi.c | |
| parent | PCI/MSI: Update MSI/MSI-X bits in PCIEBUS-HOWTO (diff) | |
| download | linux-81efbaddd687f1b478c15665716fd545e2e4401e.tar.xz linux-81efbaddd687f1b478c15665716fd545e2e4401e.zip | |
PCI/MSI: Fix msi_desc->affinity memory leak when freeing MSI IRQs
During device setup, msix_setup_entries() and msi_setup_entry() allocate
msi_desc by calling alloc_msi_entry(). alloc_msi_entry() can also allocate
a affinity cpumask. During device teardown free_msi_irqs() is called and
the msi_desc is freed, but the affinity cpumask is leaked.
Fix it by calling free_msi_entry() which frees both the msi_desc and the
affinity cpumask.
[bhelgaas: aa48b6f70886 ("genirq/MSI: Move alloc_msi_entry() from PCI into
generic MSI code") moved alloc_msi_entry() from drivers/pci/msi.c to
kernel/irq/msi.c and added a new corresponding free_msi_entry() interface.
After aa48b6f70886, pci/msi.c used alloc_msi_entry(), but did its own
kfree() instead of using free_msi_entry(). 28f4b04143c5 ("genirq/msi: Add
cpumask allocation to alloc_msi_entry") added affinity to both
alloc_msi_entry() and free_msi_entry(), but pci/msi.c didn't use
free_msi_entry(), resulting in this leak.]
Fixes: aa48b6f70886 ("genirq/MSI: Move alloc_msi_entry() from PCI into generic MSI code")
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Myron Stowe <mstowe@redhat.com>
Diffstat (limited to 'drivers/pci/msi.c')
| -rw-r--r-- | drivers/pci/msi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 93cc268c6ff1..78e4a1adb6b0 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -360,7 +360,7 @@ static void free_msi_irqs(struct pci_dev *dev) } list_del(&entry->list); - kfree(entry); + free_msi_entry(entry); } if (dev->msi_irq_groups) { |