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| author | Kunihiko Hayashi <hayashi.kunihiko@socionext.com> | 2025-02-25 20:02:48 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-04-25 10:44:00 +0200 |
| commit | 9d5118b107b1a2353ed0dff24404aee2e6b7ca0a (patch) | |
| tree | 307ac6d33f7af666d3a88f4c46d68bb83aab8303 | |
| parent | 6cc2c355aa87618a50a1e39dc22a9416fa92cc5f (diff) | |
| download | linux-9d5118b107b1a2353ed0dff24404aee2e6b7ca0a.tar.gz linux-9d5118b107b1a2353ed0dff24404aee2e6b7ca0a.tar.bz2 linux-9d5118b107b1a2353ed0dff24404aee2e6b7ca0a.zip | |
misc: pci_endpoint_test: Avoid issue of interrupts remaining after request_irq error
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.com
[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>
| -rw-r--r-- | drivers/misc/pci_endpoint_test.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c index 18059a12d4e1..7906709e7f74 100644 --- a/drivers/misc/pci_endpoint_test.c +++ b/drivers/misc/pci_endpoint_test.c @@ -262,6 +262,9 @@ fail: break; } + test->num_irqs = i; + pci_endpoint_test_release_irq(test); + return false; } |