On Fri, Aug 15, 2025 at 10:56 AM Cryolitia PukNgae via B4 Relay <devnull+cryolitia.uniontech.com@xxxxxxxxxx> wrote: > > From: Cryolitia PukNgae <cryolitia@xxxxxxxxxxxxx> > > On the Honor FMB-P-PCB laptop, an incorrect ACPI table causes > sdw_intel_acpi_scan to pass a NULL pointer as start_object to > acpi_walk_namespace() when calling it, which eventually causes the > kernel to report a NULL pointer dereference[1]. > > 1. https://gist.github.com/Cryolitia/a860ffc97437dcd2cd988371d5b73ed7 > > Signed-off-by: Cryolitia PukNgae <cryolitia@xxxxxxxxxxxxx> Please submit ACPICA changes to the upstream ACPICA project on GitHub as pull requests. Once they have been merged upstream, you can submit a Linux patch based on the upstream one with a pointer to the corresponding upstream commit. Thanks! > --- > drivers/acpi/acpica/nsxfeval.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/acpi/acpica/nsxfeval.c b/drivers/acpi/acpica/nsxfeval.c > index f9d059647cc52e94ce013af3382addba338820e8..c1f318ea7d5fcd846dc158b155286a6f5bba4cff 100644 > --- a/drivers/acpi/acpica/nsxfeval.c > +++ b/drivers/acpi/acpica/nsxfeval.c > @@ -564,7 +564,7 @@ acpi_walk_namespace(acpi_object_type type, > > /* Parameter validation */ > > - if ((type > ACPI_TYPE_LOCAL_MAX) || > + if ((type > ACPI_TYPE_LOCAL_MAX) || (start_object == NULL) || > (!max_depth) || (!descending_callback && !ascending_callback)) { > return_ACPI_STATUS(AE_BAD_PARAMETER); > } > > --- > base-commit: 24ea63ea387714634813359e2c8e0e6c36952f73 > change-id: 20250815-acpi_fix-3724e6c4da02 > > Best regards, > -- > Cryolitia PukNgae <cryolitia@xxxxxxxxxxxxx> > >
