This is a note to let you know that I've just added the patch titled
misc: pci_endpoint_test: Free IRQs before removing the device
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
misc-pci_endpoint_test-free-irqs-before-removing-the-device.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f61b7634a3249d12b9daa36ffbdb9965b6f24c6c Mon Sep 17 00:00:00 2001
From: Damien Le Moal <dlemoal@xxxxxxxxxx>
Date: Sat, 15 Apr 2023 11:35:39 +0900
Subject: misc: pci_endpoint_test: Free IRQs before removing the device
From: Damien Le Moal <dlemoal@xxxxxxxxxx>
commit f61b7634a3249d12b9daa36ffbdb9965b6f24c6c upstream.
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.
Link: https://lore.kernel.org/r/20230415023542.77601-15-dlemoal@xxxxxxxxxx
Fixes: e03327122e2c ("pci_endpoint_test: Add 2 ioctl commands")
Signed-off-by: Damien Le Moal <dlemoal@xxxxxxxxxx>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@xxxxxxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Reviewed-by: Manivannan Sadhasivam <mani@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/misc/pci_endpoint_test.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/misc/pci_endpoint_test.c
+++ b/drivers/misc/pci_endpoint_test.c
@@ -937,6 +937,9 @@ static void pci_endpoint_test_remove(str
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);
@@ -946,9 +949,6 @@ static void pci_endpoint_test_remove(str
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);
}
Patches currently in stable-queue which might be from dlemoal@xxxxxxxxxx are
queue-6.1/pci-epf-test-fix-dma-transfer-completion-detection.patch
queue-6.1/pci-rockchip-use-u32-variable-to-access-32-bit-registers.patch
queue-6.1/pci-rockchip-assert-pci-configuration-enable-bit-after-probe.patch
queue-6.1/pci-rockchip-fix-legacy-irq-generation-for-rk3399-pcie-endpoint-core.patch
queue-6.1/misc-pci_endpoint_test-free-irqs-before-removing-the-device.patch
queue-6.1/misc-pci_endpoint_test-re-init-completion-for-every-test.patch
queue-6.1/pci-epf-test-fix-dma-transfer-completion-initialization.patch
queue-6.1/pci-rockchip-add-poll-and-timeout-to-wait-for-phy-plls-to-be-locked.patch
queue-6.1/pci-rockchip-write-pci-device-id-to-correct-register.patch
queue-6.1/pci-rockchip-set-address-alignment-for-endpoint-mode.patch
