From: Alexey Simakov Date: Wed, 14 Jan 2026 12:20:17 +0000 (+0100) Subject: ACPICA: Fix NULL pointer dereference in acpi_ev_address_space_dispatch() X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f851e03bce968ff9b3faad1b616062e1244fd38d;p=thirdparty%2Fkernel%2Flinux.git ACPICA: Fix NULL pointer dereference in acpi_ev_address_space_dispatch() Cover a missed execution path with a new check. Fixes: 0acf24ad7e10 ("ACPICA: Add support for PCC Opregion special context data") Link: https://github.com/acpica/acpica/commit/f421dd9dd897 Signed-off-by: Alexey Simakov Signed-off-by: Rafael J. Wysocki Link: https://patch.msgid.link/3030574.e9J7NaK4W3@rafael.j.wysocki --- diff --git a/drivers/acpi/acpica/evregion.c b/drivers/acpi/acpica/evregion.c index fa3475da7ea9b..b6198f73c81df 100644 --- a/drivers/acpi/acpica/evregion.c +++ b/drivers/acpi/acpica/evregion.c @@ -163,7 +163,9 @@ acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj, return_ACPI_STATUS(AE_NOT_EXIST); } - if (region_obj->region.space_id == ACPI_ADR_SPACE_PLATFORM_COMM) { + if (field_obj + && region_obj->region.space_id == + ACPI_ADR_SPACE_PLATFORM_COMM) { struct acpi_pcc_info *ctx = handler_desc->address_space.context;