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Message-ID: <aF7pF4kej8VQapyR@kspp>
Date: Fri, 27 Jun 2025 12:55:19 -0600
From: "Gustavo A. R. Silva" <gustavoars@...nel.org>
To: Dan Williams <dan.j.williams@...el.com>, Kees Cook <kees@...nel.org>,
Vishal Verma <vishal.l.verma@...el.com>,
Dave Jiang <dave.jiang@...el.com>, Ira Weiny <ira.weiny@...el.com>,
"Rafael J. Wysocki" <rafael@...nel.org>,
Len Brown <lenb@...nel.org>
Cc: nvdimm@...ts.linux.dev, linux-acpi@...r.kernel.org,
linux-kernel@...r.kernel.org,
"Gustavo A. R. Silva" <gustavoars@...nel.org>,
linux-hardening@...r.kernel.org
Subject: [PATCH v5][for-next/hardening] acpi: nfit: intel: avoid multiple
-Wflex-array-member-not-at-end warnings
-Wflex-array-member-not-at-end was introduced in GCC-14, and we are
getting ready to enable it, globally.
Use the new TRAILING_OVERLAP() helper to fix a dozen instances of
the following type of warning:
drivers/acpi/nfit/intel.c:692:35: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
Acked-by: Dan Williams <dan.j.williams@...el.com>
Tested-by: Dan Williams <dan.j.williams@...el.com>
Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
---
Changes in v5:
- Fix union initialization. (Dan)
- Leave trailing object indentation unchanged. (Kees)
Changes in v4:
- Use the new TRAILING_OVERLAP() helper.
- Link: https://lore.kernel.org/linux-hardening/aFxtOLs6Yv_uzgt4@kspp/
Changes in v3:
- Use union instead of DEFINE_RAW_FLEX().
- Link: https://lore.kernel.org/linux-hardening/aEneid7gdAZr1_kR@kspp/
Changes in v2:
- Use DEFINE_RAW_FLEX() instead of __struct_group().
- Link: https://lore.kernel.org/linux-hardening/Z-QpUcxFCRByYcTA@kspp/
v1:
- Link: https://lore.kernel.org/linux-hardening/Z618ILbAR8YAvTkd@kspp/
drivers/acpi/nfit/intel.c | 119 +++++++++++++++++---------------------
1 file changed, 52 insertions(+), 67 deletions(-)
diff --git a/drivers/acpi/nfit/intel.c b/drivers/acpi/nfit/intel.c
index 3902759abcba..bce6f6a18426 100644
--- a/drivers/acpi/nfit/intel.c
+++ b/drivers/acpi/nfit/intel.c
@@ -55,10 +55,9 @@ static unsigned long intel_security_flags(struct nvdimm *nvdimm,
{
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
unsigned long security_flags = 0;
- struct {
- struct nd_cmd_pkg pkg;
+ TRAILING_OVERLAP(struct nd_cmd_pkg, pkg, nd_payload,
struct nd_intel_get_security_state cmd;
- } nd_cmd = {
+ ) nd_cmd = {
.pkg = {
.nd_command = NVDIMM_INTEL_GET_SECURITY_STATE,
.nd_family = NVDIMM_FAMILY_INTEL,
@@ -120,10 +119,9 @@ static unsigned long intel_security_flags(struct nvdimm *nvdimm,
static int intel_security_freeze(struct nvdimm *nvdimm)
{
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
- struct {
- struct nd_cmd_pkg pkg;
+ TRAILING_OVERLAP(struct nd_cmd_pkg, pkg, nd_payload,
struct nd_intel_freeze_lock cmd;
- } nd_cmd = {
+ ) nd_cmd = {
.pkg = {
.nd_command = NVDIMM_INTEL_FREEZE_LOCK,
.nd_family = NVDIMM_FAMILY_INTEL,
@@ -153,10 +151,9 @@ static int intel_security_change_key(struct nvdimm *nvdimm,
unsigned int cmd = ptype == NVDIMM_MASTER ?
NVDIMM_INTEL_SET_MASTER_PASSPHRASE :
NVDIMM_INTEL_SET_PASSPHRASE;
- struct {
- struct nd_cmd_pkg pkg;
+ TRAILING_OVERLAP(struct nd_cmd_pkg, pkg, nd_payload,
struct nd_intel_set_passphrase cmd;
- } nd_cmd = {
+ ) nd_cmd = {
.pkg = {
.nd_family = NVDIMM_FAMILY_INTEL,
.nd_size_in = ND_INTEL_PASSPHRASE_SIZE * 2,
@@ -195,10 +192,9 @@ static int __maybe_unused intel_security_unlock(struct nvdimm *nvdimm,
const struct nvdimm_key_data *key_data)
{
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
- struct {
- struct nd_cmd_pkg pkg;
+ TRAILING_OVERLAP(struct nd_cmd_pkg, pkg, nd_payload,
struct nd_intel_unlock_unit cmd;
- } nd_cmd = {
+ ) nd_cmd = {
.pkg = {
.nd_command = NVDIMM_INTEL_UNLOCK_UNIT,
.nd_family = NVDIMM_FAMILY_INTEL,
@@ -234,10 +230,9 @@ static int intel_security_disable(struct nvdimm *nvdimm,
{
int rc;
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
- struct {
- struct nd_cmd_pkg pkg;
+ TRAILING_OVERLAP(struct nd_cmd_pkg, pkg, nd_payload,
struct nd_intel_disable_passphrase cmd;
- } nd_cmd = {
+ ) nd_cmd = {
.pkg = {
.nd_command = NVDIMM_INTEL_DISABLE_PASSPHRASE,
.nd_family = NVDIMM_FAMILY_INTEL,
@@ -277,10 +272,9 @@ static int __maybe_unused intel_security_erase(struct nvdimm *nvdimm,
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
unsigned int cmd = ptype == NVDIMM_MASTER ?
NVDIMM_INTEL_MASTER_SECURE_ERASE : NVDIMM_INTEL_SECURE_ERASE;
- struct {
- struct nd_cmd_pkg pkg;
+ TRAILING_OVERLAP(struct nd_cmd_pkg, pkg, nd_payload,
struct nd_intel_secure_erase cmd;
- } nd_cmd = {
+ ) nd_cmd = {
.pkg = {
.nd_family = NVDIMM_FAMILY_INTEL,
.nd_size_in = ND_INTEL_PASSPHRASE_SIZE,
@@ -318,10 +312,9 @@ static int __maybe_unused intel_security_query_overwrite(struct nvdimm *nvdimm)
{
int rc;
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
- struct {
- struct nd_cmd_pkg pkg;
+ TRAILING_OVERLAP(struct nd_cmd_pkg, pkg, nd_payload,
struct nd_intel_query_overwrite cmd;
- } nd_cmd = {
+ ) nd_cmd = {
.pkg = {
.nd_command = NVDIMM_INTEL_QUERY_OVERWRITE,
.nd_family = NVDIMM_FAMILY_INTEL,
@@ -354,10 +347,9 @@ static int __maybe_unused intel_security_overwrite(struct nvdimm *nvdimm,
{
int rc;
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
- struct {
- struct nd_cmd_pkg pkg;
+ TRAILING_OVERLAP(struct nd_cmd_pkg, pkg, nd_payload,
struct nd_intel_overwrite cmd;
- } nd_cmd = {
+ ) nd_cmd = {
.pkg = {
.nd_command = NVDIMM_INTEL_OVERWRITE,
.nd_family = NVDIMM_FAMILY_INTEL,
@@ -407,10 +399,9 @@ const struct nvdimm_security_ops *intel_security_ops = &__intel_security_ops;
static int intel_bus_fwa_businfo(struct nvdimm_bus_descriptor *nd_desc,
struct nd_intel_bus_fw_activate_businfo *info)
{
- struct {
- struct nd_cmd_pkg pkg;
+ TRAILING_OVERLAP(struct nd_cmd_pkg, pkg, nd_payload,
struct nd_intel_bus_fw_activate_businfo cmd;
- } nd_cmd = {
+ ) nd_cmd = {
.pkg = {
.nd_command = NVDIMM_BUS_INTEL_FW_ACTIVATE_BUSINFO,
.nd_family = NVDIMM_BUS_FAMILY_INTEL,
@@ -518,33 +509,31 @@ static enum nvdimm_fwa_capability intel_bus_fwa_capability(
static int intel_bus_fwa_activate(struct nvdimm_bus_descriptor *nd_desc)
{
struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
- struct {
- struct nd_cmd_pkg pkg;
+ TRAILING_OVERLAP(struct nd_cmd_pkg, pkg, nd_payload,
struct nd_intel_bus_fw_activate cmd;
- } nd_cmd = {
- .pkg = {
- .nd_command = NVDIMM_BUS_INTEL_FW_ACTIVATE,
- .nd_family = NVDIMM_BUS_FAMILY_INTEL,
- .nd_size_in = sizeof(nd_cmd.cmd.iodev_state),
- .nd_size_out =
- sizeof(struct nd_intel_bus_fw_activate),
- .nd_fw_size =
- sizeof(struct nd_intel_bus_fw_activate),
- },
+ ) nd_cmd;
+ int rc;
+
+ nd_cmd.pkg = (struct nd_cmd_pkg) {
+ .nd_command = NVDIMM_BUS_INTEL_FW_ACTIVATE,
+ .nd_family = NVDIMM_BUS_FAMILY_INTEL,
+ .nd_size_in = sizeof(nd_cmd.cmd.iodev_state),
+ .nd_size_out =
+ sizeof(struct nd_intel_bus_fw_activate),
+ .nd_fw_size =
+ sizeof(struct nd_intel_bus_fw_activate),
+ };
+ nd_cmd.cmd = (struct nd_intel_bus_fw_activate) {
/*
* Even though activate is run from a suspended context,
* for safety, still ask platform firmware to force
* quiesce devices by default. Let a module
* parameter override that policy.
*/
- .cmd = {
- .iodev_state = acpi_desc->fwa_noidle
- ? ND_INTEL_BUS_FWA_IODEV_OS_IDLE
- : ND_INTEL_BUS_FWA_IODEV_FORCE_IDLE,
- },
+ .iodev_state = acpi_desc->fwa_noidle
+ ? ND_INTEL_BUS_FWA_IODEV_OS_IDLE
+ : ND_INTEL_BUS_FWA_IODEV_FORCE_IDLE,
};
- int rc;
-
switch (intel_bus_fwa_state(nd_desc)) {
case NVDIMM_FWA_ARMED:
case NVDIMM_FWA_ARM_OVERFLOW:
@@ -582,10 +571,9 @@ const struct nvdimm_bus_fw_ops *intel_bus_fw_ops = &__intel_bus_fw_ops;
static int intel_fwa_dimminfo(struct nvdimm *nvdimm,
struct nd_intel_fw_activate_dimminfo *info)
{
- struct {
- struct nd_cmd_pkg pkg;
+ TRAILING_OVERLAP(struct nd_cmd_pkg, pkg, nd_payload,
struct nd_intel_fw_activate_dimminfo cmd;
- } nd_cmd = {
+ ) nd_cmd = {
.pkg = {
.nd_command = NVDIMM_INTEL_FW_ACTIVATE_DIMMINFO,
.nd_family = NVDIMM_FAMILY_INTEL,
@@ -688,27 +676,24 @@ static int intel_fwa_arm(struct nvdimm *nvdimm, enum nvdimm_fwa_trigger arm)
{
struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
struct acpi_nfit_desc *acpi_desc = nfit_mem->acpi_desc;
- struct {
- struct nd_cmd_pkg pkg;
+ TRAILING_OVERLAP(struct nd_cmd_pkg, pkg, nd_payload,
struct nd_intel_fw_activate_arm cmd;
- } nd_cmd = {
- .pkg = {
- .nd_command = NVDIMM_INTEL_FW_ACTIVATE_ARM,
- .nd_family = NVDIMM_FAMILY_INTEL,
- .nd_size_in = sizeof(nd_cmd.cmd.activate_arm),
- .nd_size_out =
- sizeof(struct nd_intel_fw_activate_arm),
- .nd_fw_size =
- sizeof(struct nd_intel_fw_activate_arm),
- },
- .cmd = {
- .activate_arm = arm == NVDIMM_FWA_ARM
- ? ND_INTEL_DIMM_FWA_ARM
- : ND_INTEL_DIMM_FWA_DISARM,
- },
- };
+ ) nd_cmd;
int rc;
+ nd_cmd.pkg = (struct nd_cmd_pkg) {
+ .nd_command = NVDIMM_INTEL_FW_ACTIVATE_ARM,
+ .nd_family = NVDIMM_FAMILY_INTEL,
+ .nd_size_in = sizeof(nd_cmd.cmd.activate_arm),
+ .nd_size_out = sizeof(struct nd_intel_fw_activate_arm),
+ .nd_fw_size = sizeof(struct nd_intel_fw_activate_arm),
+ };
+ nd_cmd.cmd = (struct nd_intel_fw_activate_arm) {
+ .activate_arm = arm == NVDIMM_FWA_ARM ?
+ ND_INTEL_DIMM_FWA_ARM :
+ ND_INTEL_DIMM_FWA_DISARM,
+ };
+
switch (intel_fwa_state(nvdimm)) {
case NVDIMM_FWA_INVALID:
return -ENXIO;
--
2.43.0
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