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| author | Nikita Kiryushin <kiryushin@ancud.ru> | 2023-11-09 16:49:25 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-26 01:37:40 +0300 |
| commit | c4e1a0ef0b4782854c9b77a333ca912b392bed2f (patch) | |
| tree | 07c7f884430d3a9496d9d381c67504b51e054dc6 /drivers/acpi/pci_mcfg.c | |
| parent | 11ac297aba78e7f29c8344c4e0b02620bc23c446 (diff) | |
| download | linux-c4e1a0ef0b4782854c9b77a333ca912b392bed2f.tar.xz | |
ACPI: video: check for error while searching for backlight device parent
[ Upstream commit ccd45faf4973746c4f30ea41eec864e5cf191099 ]
If acpi_get_parent() called in acpi_video_dev_register_backlight()
fails, for example, because acpi_ut_acquire_mutex() fails inside
acpi_get_parent), this can lead to incorrect (uninitialized)
acpi_parent handle being passed to acpi_get_pci_dev() for detecting
the parent pci device.
Check acpi_get_parent() result and set parent device only in case of success.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: 9661e92c10a9 ("acpi: tie ACPI backlight devices to PCI devices if possible")
Signed-off-by: Nikita Kiryushin <kiryushin@ancud.ru>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/acpi/pci_mcfg.c')
0 files changed, 0 insertions, 0 deletions