| Message ID | 20241109220028.83047-1-hdegoede@redhat.com |
|---|---|
| State | New |
| Headers | show |
| Series | ACPI: x86: Add adev NULL check to acpi_quirk_skip_serdev_enumeration() | expand |
On Sat, Nov 9, 2024 at 11:00 PM Hans de Goede <hdegoede@redhat.com> wrote: > > acpi_dev_hid_match() does not check for adev == NULL, dereferencing > it unconditional. > > Add a check for adev being NULL before calling acpi_dev_hid_match(). > > At the moment acpi_quirk_skip_serdev_enumeration() is never called with > a controller_parent without an ACPI companion, but better safe than sorry. > > Signed-off-by: Hans de Goede <hdegoede@redhat.com> > --- > drivers/acpi/x86/utils.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/acpi/x86/utils.c b/drivers/acpi/x86/utils.c > index 3eec889d4f5f..423565c31d5e 100644 > --- a/drivers/acpi/x86/utils.c > +++ b/drivers/acpi/x86/utils.c > @@ -536,7 +536,7 @@ int acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *s > * Set skip to true so that the tty core creates a serdev ctrl device. > * The backlight driver will manually create the serdev client device. > */ > - if (acpi_dev_hid_match(adev, "DELL0501")) { > + if (adev && acpi_dev_hid_match(adev, "DELL0501")) { > *skip = true; > /* > * Create a platform dev for dell-uart-backlight to bind to. > -- Applied as 6.13 material, thanks!
diff --git a/drivers/acpi/x86/utils.c b/drivers/acpi/x86/utils.c index 3eec889d4f5f..423565c31d5e 100644 --- a/drivers/acpi/x86/utils.c +++ b/drivers/acpi/x86/utils.c @@ -536,7 +536,7 @@ int acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *s * Set skip to true so that the tty core creates a serdev ctrl device. * The backlight driver will manually create the serdev client device. */ - if (acpi_dev_hid_match(adev, "DELL0501")) { + if (adev && acpi_dev_hid_match(adev, "DELL0501")) { *skip = true; /* * Create a platform dev for dell-uart-backlight to bind to.
acpi_dev_hid_match() does not check for adev == NULL, dereferencing it unconditional. Add a check for adev being NULL before calling acpi_dev_hid_match(). At the moment acpi_quirk_skip_serdev_enumeration() is never called with a controller_parent without an ACPI companion, but better safe than sorry. Signed-off-by: Hans de Goede <hdegoede@redhat.com> --- drivers/acpi/x86/utils.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)