5.4-stable review patch. If anyone has any objections, please let me know.
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From: Kunihiko Hayashi hayashi.kunihiko@socionext.com
commit f6cb7828c8e17520d4f5afb416515d3fae1af9a9 upstream.
After devm_request_irq() fails with error in pci_endpoint_test_request_irq(), the pci_endpoint_test_free_irq_vectors() is called assuming that all IRQs have been released.
However, some requested IRQs remain unreleased, so there are still /proc/irq/* entries remaining, and this results in WARN() with the following message:
remove_proc_entry: removing non-empty directory 'irq/30', leaking at least 'pci-endpoint-test.0' WARNING: CPU: 0 PID: 202 at fs/proc/generic.c:719 remove_proc_entry +0x190/0x19c
To solve this issue, set the number of remaining IRQs to test->num_irqs, and release IRQs in advance by calling pci_endpoint_test_release_irq().
Cc: stable@vger.kernel.org Fixes: e03327122e2c ("pci_endpoint_test: Add 2 ioctl commands") Reviewed-by: Manivannan Sadhasivam manivannan.sadhasivam@linaro.org Signed-off-by: Kunihiko Hayashi hayashi.kunihiko@socionext.com Link: https://lore.kernel.org/r/20250225110252.28866-3-hayashi.kunihiko@socionext.... [kwilczynski: commit log] Signed-off-by: Krzysztof Wilczyński kwilczynski@kernel.org Signed-off-by: Kunihiko Hayashi hayashi.kunihiko@socionext.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/misc/pci_endpoint_test.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/misc/pci_endpoint_test.c +++ b/drivers/misc/pci_endpoint_test.c @@ -247,6 +247,9 @@ fail: break; }
+ test->num_irqs = i; + pci_endpoint_test_release_irq(test); + return false; }