diff mbox series

[v3,13/16] misc: pci_endpoint_test: Free IRQs before removing the device

Message ID 20230325070226.511323-14-damien.lemoal@opensource.wdc.com (mailing list archive)
State Superseded
Headers show
Series PCI endpoint fixes and improvements | expand

Commit Message

Damien Le Moal March 25, 2023, 7:02 a.m. UTC 
In pci_endpoint_test_remove(), freeing the IRQs after removing the
device creates a small race window for IRQs to be received with the test
device memory already released, causing the IRQ handler to access
invalid memory, resulting in an oops.

Free the device IRQs before removing the device to avoid this issue.

Fixes: e03327122e2c ("pci_endpoint_test: Add 2 ioctl commands")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
---
 drivers/misc/pci_endpoint_test.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
index a7244de081ec..01235236e9bc 100644
--- a/drivers/misc/pci_endpoint_test.c
+++ b/drivers/misc/pci_endpoint_test.c
@@ -938,6 +938,9 @@  static void pci_endpoint_test_remove(struct pci_dev *pdev)
 	if (id < 0)
 		return;
 
+	pci_endpoint_test_release_irq(test);
+	pci_endpoint_test_free_irq_vectors(test);
+
 	misc_deregister(&test->miscdev);
 	kfree(misc_device->name);
 	kfree(test->name);
@@ -947,9 +950,6 @@  static void pci_endpoint_test_remove(struct pci_dev *pdev)
 			pci_iounmap(pdev, test->bar[bar]);
 	}
 
-	pci_endpoint_test_release_irq(test);
-	pci_endpoint_test_free_irq_vectors(test);
-
 	pci_release_regions(pdev);
 	pci_disable_device(pdev);
 }