One-element arrays are deprecated, and we are replacing them with
flexible array members instead. So, replace one-element array with
flexible-array member in structs _ATOM_DISPLAY_OBJECT_PATH,
_ATOM_DISPLAY_OBJECT_PATH_TABLE, _ATOM_OBJECT_TABLE, GOP_VBIOS_CONTENT
_ATOM_GPIO_VOLTAGE_OBJECT_V3 and refactor the rest of the code accordingly.
It's worth mentioning that doing a build before/after this patch
results in no binary output differences.
This helps with the ongoing efforts to tighten the FORTIFY_SOURCE
routines on memcpy() and help us make progress towards globally
enabling -fstrict-flex-arrays=3 [1].
Link: https://github.com/KSPP/linux/issues/79
Link: https://github.com/KSPP/linux/issues/239
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101836 [1]
Signed-off-by: Paulo Miguel Almeida <[email protected]>
---
Notes for the maintainer:
- These are all fake-flexible arrays with references in source code for
the radeon driver. Given the way they are used, no change to *.c files
were required.
---
drivers/gpu/drm/radeon/atombios.h | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/radeon/atombios.h b/drivers/gpu/drm/radeon/atombios.h
index 235e59b547a1..8a6621f1e82c 100644
--- a/drivers/gpu/drm/radeon/atombios.h
+++ b/drivers/gpu/drm/radeon/atombios.h
@@ -4020,7 +4020,7 @@ typedef struct _ATOM_DISPLAY_OBJECT_PATH
USHORT usSize; //the size of ATOM_DISPLAY_OBJECT_PATH
USHORT usConnObjectId; //Connector Object ID
USHORT usGPUObjectId; //GPU ID
- USHORT usGraphicObjIds[1]; //1st Encoder Obj source from GPU to last Graphic Obj destinate to connector.
+ USHORT usGraphicObjIds[]; //1st Encoder Obj source from GPU to last Graphic Obj destinate to connector.
}ATOM_DISPLAY_OBJECT_PATH;
typedef struct _ATOM_DISPLAY_EXTERNAL_OBJECT_PATH
@@ -4037,7 +4037,7 @@ typedef struct _ATOM_DISPLAY_OBJECT_PATH_TABLE
UCHAR ucNumOfDispPath;
UCHAR ucVersion;
UCHAR ucPadding[2];
- ATOM_DISPLAY_OBJECT_PATH asDispPath[1];
+ ATOM_DISPLAY_OBJECT_PATH asDispPath[];
}ATOM_DISPLAY_OBJECT_PATH_TABLE;
@@ -4053,7 +4053,7 @@ typedef struct _ATOM_OBJECT_TABLE //Above 4 object table
{
UCHAR ucNumberOfObjects;
UCHAR ucPadding[3];
- ATOM_OBJECT asObjects[1];
+ ATOM_OBJECT asObjects[];
}ATOM_OBJECT_TABLE;
typedef struct _ATOM_SRC_DST_TABLE_FOR_ONE_OBJECT //usSrcDstTableOffset pointing to this structure
@@ -4615,7 +4615,7 @@ typedef struct _ATOM_GPIO_VOLTAGE_OBJECT_V3
UCHAR ucPhaseDelay; // phase delay in unit of micro second
UCHAR ucReserved;
ULONG ulGpioMaskVal; // GPIO Mask value
- VOLTAGE_LUT_ENTRY_V2 asVolGpioLut[1];
+ VOLTAGE_LUT_ENTRY_V2 asVolGpioLut[];
}ATOM_GPIO_VOLTAGE_OBJECT_V3;
typedef struct _ATOM_LEAKAGE_VOLTAGE_OBJECT_V3
@@ -7964,7 +7964,7 @@ typedef struct {
typedef struct {
VFCT_IMAGE_HEADER VbiosHeader;
- UCHAR VbiosContent[1];
+ UCHAR VbiosContent[];
}GOP_VBIOS_CONTENT;
typedef struct {
--
2.38.1
Applied. Thanks!
Alex
On Fri, Dec 9, 2022 at 3:24 AM Paulo Miguel Almeida
<[email protected]> wrote:
>
> One-element arrays are deprecated, and we are replacing them with
> flexible array members instead. So, replace one-element array with
> flexible-array member in structs _ATOM_DISPLAY_OBJECT_PATH,
> _ATOM_DISPLAY_OBJECT_PATH_TABLE, _ATOM_OBJECT_TABLE, GOP_VBIOS_CONTENT
> _ATOM_GPIO_VOLTAGE_OBJECT_V3 and refactor the rest of the code accordingly.
>
> It's worth mentioning that doing a build before/after this patch
> results in no binary output differences.
>
> This helps with the ongoing efforts to tighten the FORTIFY_SOURCE
> routines on memcpy() and help us make progress towards globally
> enabling -fstrict-flex-arrays=3 [1].
>
> Link: https://github.com/KSPP/linux/issues/79
> Link: https://github.com/KSPP/linux/issues/239
> Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101836 [1]
>
> Signed-off-by: Paulo Miguel Almeida <[email protected]>
> ---
> Notes for the maintainer:
>
> - These are all fake-flexible arrays with references in source code for
> the radeon driver. Given the way they are used, no change to *.c files
> were required.
> ---
> drivers/gpu/drm/radeon/atombios.h | 10 +++++-----
> 1 file changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/atombios.h b/drivers/gpu/drm/radeon/atombios.h
> index 235e59b547a1..8a6621f1e82c 100644
> --- a/drivers/gpu/drm/radeon/atombios.h
> +++ b/drivers/gpu/drm/radeon/atombios.h
> @@ -4020,7 +4020,7 @@ typedef struct _ATOM_DISPLAY_OBJECT_PATH
> USHORT usSize; //the size of ATOM_DISPLAY_OBJECT_PATH
> USHORT usConnObjectId; //Connector Object ID
> USHORT usGPUObjectId; //GPU ID
> - USHORT usGraphicObjIds[1]; //1st Encoder Obj source from GPU to last Graphic Obj destinate to connector.
> + USHORT usGraphicObjIds[]; //1st Encoder Obj source from GPU to last Graphic Obj destinate to connector.
> }ATOM_DISPLAY_OBJECT_PATH;
>
> typedef struct _ATOM_DISPLAY_EXTERNAL_OBJECT_PATH
> @@ -4037,7 +4037,7 @@ typedef struct _ATOM_DISPLAY_OBJECT_PATH_TABLE
> UCHAR ucNumOfDispPath;
> UCHAR ucVersion;
> UCHAR ucPadding[2];
> - ATOM_DISPLAY_OBJECT_PATH asDispPath[1];
> + ATOM_DISPLAY_OBJECT_PATH asDispPath[];
> }ATOM_DISPLAY_OBJECT_PATH_TABLE;
>
>
> @@ -4053,7 +4053,7 @@ typedef struct _ATOM_OBJECT_TABLE //Above 4 object table
> {
> UCHAR ucNumberOfObjects;
> UCHAR ucPadding[3];
> - ATOM_OBJECT asObjects[1];
> + ATOM_OBJECT asObjects[];
> }ATOM_OBJECT_TABLE;
>
> typedef struct _ATOM_SRC_DST_TABLE_FOR_ONE_OBJECT //usSrcDstTableOffset pointing to this structure
> @@ -4615,7 +4615,7 @@ typedef struct _ATOM_GPIO_VOLTAGE_OBJECT_V3
> UCHAR ucPhaseDelay; // phase delay in unit of micro second
> UCHAR ucReserved;
> ULONG ulGpioMaskVal; // GPIO Mask value
> - VOLTAGE_LUT_ENTRY_V2 asVolGpioLut[1];
> + VOLTAGE_LUT_ENTRY_V2 asVolGpioLut[];
> }ATOM_GPIO_VOLTAGE_OBJECT_V3;
>
> typedef struct _ATOM_LEAKAGE_VOLTAGE_OBJECT_V3
> @@ -7964,7 +7964,7 @@ typedef struct {
>
> typedef struct {
> VFCT_IMAGE_HEADER VbiosHeader;
> - UCHAR VbiosContent[1];
> + UCHAR VbiosContent[];
> }GOP_VBIOS_CONTENT;
>
> typedef struct {
> --
> 2.38.1
>