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| author | Nikita Kiryushin <kiryushin@ancud.ru> | 2023-11-09 16:49:25 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2023-11-21 20:47:05 +0100 |
| commit | ccd45faf4973746c4f30ea41eec864e5cf191099 (patch) | |
| tree | fb4f487d49001f319fe7b068fd70a2738277add1 /virt | |
| parent | c7add369b4cc599db336ca67578a052c5b0f0891 (diff) | |
ACPI: video: check for error while searching for backlight device parent
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>
Diffstat (limited to 'virt')
0 files changed, 0 insertions, 0 deletions