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Wysocki" Cc: Alexey Simakov , Robert Moore , Len Brown , Sudeep Holla , linux-acpi@vger.kernel.org, acpica-devel@lists.linux.dev, linux-kernel@vger.kernel.org, lvc-project@linuxtesting.org Subject: [PATCH] ACPI: Add absent field_obj null check Date: Thu, 9 Oct 2025 16:56:47 +0300 Message-Id: <20251009135646.8899-1-bigalex934@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The acpi_ev_address_space_dispatch function is designed in such way that assignning field_obj to NULL is valid case. Cover the missed execution path with this check. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: 0acf24ad7e10 ("ACPICA: Add support for PCC Opregion special context = data") Signed-off-by: Alexey Simakov --- drivers/acpi/acpica/evregion.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/acpi/acpica/evregion.c b/drivers/acpi/acpica/evregion.c index fa3475da7ea9..fa01bcd3840d 100644 --- a/drivers/acpi/acpica/evregion.c +++ b/drivers/acpi/acpica/evregion.c @@ -163,7 +163,7 @@ acpi_ev_address_space_dispatch(union acpi_operand_objec= t *region_obj, return_ACPI_STATUS(AE_NOT_EXIST); } =20 - if (region_obj->region.space_id =3D=3D ACPI_ADR_SPACE_PLATFORM_COMM) { + if (field_obj && region_obj->region.space_id =3D=3D ACPI_ADR_SPACE_PLATF= ORM_COMM) { struct acpi_pcc_info *ctx =3D handler_desc->address_space.context; =20 --=20 2.34.1 Just FYI, this patch was already merged to github ACPICA repository. Commit hash with correspond changes at ACPICA repository: f421dd9dd897dfd1e= 0c015afa90cd0de2464e23c