[PATCH AUTOSEL 4.14 4/4] drm/amd: Fix UBSAN array-index-out-of-bounds for Powerplay headers

[Sasha Levin]

From: Alex Deucher <alexander.deucher at amd.com>

[ Upstream commit 49afe91370b86566857a3c2c39612cf098110885 ]

For pptable structs that use flexible array sizes, use flexible arrays.

Link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2039926
Reviewed-by: Mario Limonciello <mario.limonciello at amd.com>
Acked-by: Christian König <christian.koenig at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Sasha Levin <sashal at kernel.org>
---
 .../drm/amd/powerplay/hwmgr/pptable_v1_0.h    |  4 ++--
 .../drm/amd/powerplay/hwmgr/vega10_pptable.h  | 24 +++++++++----------
 2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/pptable_v1_0.h b/drivers/gpu/drm/amd/powerplay/hwmgr/pptable_v1_0.h
index 1e870f58dd12a..8f6ecbbfa5738 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/pptable_v1_0.h
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/pptable_v1_0.h
@@ -337,7 +337,7 @@ typedef struct _ATOM_Tonga_VCE_State_Record {
 typedef struct _ATOM_Tonga_VCE_State_Table {
 	UCHAR ucRevId;
 	UCHAR ucNumEntries;
-	ATOM_Tonga_VCE_State_Record entries[1];
+	ATOM_Tonga_VCE_State_Record entries[];
 } ATOM_Tonga_VCE_State_Table;
 
 typedef struct _ATOM_Tonga_PowerTune_Table {
@@ -416,7 +416,7 @@ typedef struct _ATOM_Tonga_Hard_Limit_Record {
 typedef struct _ATOM_Tonga_Hard_Limit_Table {
 	UCHAR ucRevId;
 	UCHAR ucNumEntries;
-	ATOM_Tonga_Hard_Limit_Record entries[1];
+	ATOM_Tonga_Hard_Limit_Record entries[];
 } ATOM_Tonga_Hard_Limit_Table;
 
 typedef struct _ATOM_Tonga_GPIO_Table {
diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_pptable.h b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_pptable.h
index b3e63003a789c..465f4ded342e1 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_pptable.h
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_pptable.h
@@ -129,7 +129,7 @@ typedef struct _ATOM_Vega10_State {
 typedef struct _ATOM_Vega10_State_Array {
 	UCHAR ucRevId;
 	UCHAR ucNumEntries;                                         /* Number of entries. */
-	ATOM_Vega10_State states[1];                             /* Dynamically allocate entries. */
+	ATOM_Vega10_State states[];                             /* Dynamically allocate entries. */
 } ATOM_Vega10_State_Array;
 
 typedef struct _ATOM_Vega10_CLK_Dependency_Record {
@@ -169,37 +169,37 @@ typedef struct _ATOM_Vega10_GFXCLK_Dependency_Table {
 typedef struct _ATOM_Vega10_MCLK_Dependency_Table {
     UCHAR ucRevId;
     UCHAR ucNumEntries;                                         /* Number of entries. */
-    ATOM_Vega10_MCLK_Dependency_Record entries[1];            /* Dynamically allocate entries. */
+    ATOM_Vega10_MCLK_Dependency_Record entries[];            /* Dynamically allocate entries. */
 } ATOM_Vega10_MCLK_Dependency_Table;
 
 typedef struct _ATOM_Vega10_SOCCLK_Dependency_Table {
     UCHAR ucRevId;
     UCHAR ucNumEntries;                                         /* Number of entries. */
-    ATOM_Vega10_CLK_Dependency_Record entries[1];            /* Dynamically allocate entries. */
+    ATOM_Vega10_CLK_Dependency_Record entries[];            /* Dynamically allocate entries. */
 } ATOM_Vega10_SOCCLK_Dependency_Table;
 
 typedef struct _ATOM_Vega10_DCEFCLK_Dependency_Table {
     UCHAR ucRevId;
     UCHAR ucNumEntries;                                         /* Number of entries. */
-    ATOM_Vega10_CLK_Dependency_Record entries[1];            /* Dynamically allocate entries. */
+    ATOM_Vega10_CLK_Dependency_Record entries[];            /* Dynamically allocate entries. */
 } ATOM_Vega10_DCEFCLK_Dependency_Table;
 
 typedef struct _ATOM_Vega10_PIXCLK_Dependency_Table {
 	UCHAR ucRevId;
 	UCHAR ucNumEntries;                                         /* Number of entries. */
-	ATOM_Vega10_CLK_Dependency_Record entries[1];            /* Dynamically allocate entries. */
+	ATOM_Vega10_CLK_Dependency_Record entries[];            /* Dynamically allocate entries. */
 } ATOM_Vega10_PIXCLK_Dependency_Table;
 
 typedef struct _ATOM_Vega10_DISPCLK_Dependency_Table {
 	UCHAR ucRevId;
 	UCHAR ucNumEntries;                                         /* Number of entries.*/
-	ATOM_Vega10_CLK_Dependency_Record entries[1];            /* Dynamically allocate entries. */
+	ATOM_Vega10_CLK_Dependency_Record entries[];            /* Dynamically allocate entries. */
 } ATOM_Vega10_DISPCLK_Dependency_Table;
 
 typedef struct _ATOM_Vega10_PHYCLK_Dependency_Table {
 	UCHAR ucRevId;
 	UCHAR ucNumEntries;                                         /* Number of entries. */
-	ATOM_Vega10_CLK_Dependency_Record entries[1];            /* Dynamically allocate entries. */
+	ATOM_Vega10_CLK_Dependency_Record entries[];            /* Dynamically allocate entries. */
 } ATOM_Vega10_PHYCLK_Dependency_Table;
 
 typedef struct _ATOM_Vega10_MM_Dependency_Record {
@@ -213,7 +213,7 @@ typedef struct _ATOM_Vega10_MM_Dependency_Record {
 typedef struct _ATOM_Vega10_MM_Dependency_Table {
 	UCHAR ucRevId;
 	UCHAR ucNumEntries;                                         /* Number of entries */
-	ATOM_Vega10_MM_Dependency_Record entries[1];             /* Dynamically allocate entries */
+	ATOM_Vega10_MM_Dependency_Record entries[];             /* Dynamically allocate entries */
 } ATOM_Vega10_MM_Dependency_Table;
 
 typedef struct _ATOM_Vega10_PCIE_Record {
@@ -225,7 +225,7 @@ typedef struct _ATOM_Vega10_PCIE_Record {
 typedef struct _ATOM_Vega10_PCIE_Table {
 	UCHAR  ucRevId;
 	UCHAR  ucNumEntries;                                        /* Number of entries */
-	ATOM_Vega10_PCIE_Record entries[1];                      /* Dynamically allocate entries. */
+	ATOM_Vega10_PCIE_Record entries[];                      /* Dynamically allocate entries. */
 } ATOM_Vega10_PCIE_Table;
 
 typedef struct _ATOM_Vega10_Voltage_Lookup_Record {
@@ -235,7 +235,7 @@ typedef struct _ATOM_Vega10_Voltage_Lookup_Record {
 typedef struct _ATOM_Vega10_Voltage_Lookup_Table {
 	UCHAR ucRevId;
 	UCHAR ucNumEntries;                                          /* Number of entries */
-	ATOM_Vega10_Voltage_Lookup_Record entries[1];             /* Dynamically allocate entries */
+	ATOM_Vega10_Voltage_Lookup_Record entries[];             /* Dynamically allocate entries */
 } ATOM_Vega10_Voltage_Lookup_Table;
 
 typedef struct _ATOM_Vega10_Fan_Table {
@@ -305,7 +305,7 @@ typedef struct _ATOM_Vega10_VCE_State_Table
 {
     UCHAR ucRevId;
     UCHAR ucNumEntries;
-    ATOM_Vega10_VCE_State_Record entries[1];
+    ATOM_Vega10_VCE_State_Record entries[];
 } ATOM_Vega10_VCE_State_Table;
 
 typedef struct _ATOM_Vega10_PowerTune_Table {
@@ -408,7 +408,7 @@ typedef struct _ATOM_Vega10_Hard_Limit_Table
 {
     UCHAR ucRevId;
     UCHAR ucNumEntries;
-    ATOM_Vega10_Hard_Limit_Record entries[1];
+    ATOM_Vega10_Hard_Limit_Record entries[];
 } ATOM_Vega10_Hard_Limit_Table;
 
 typedef struct _Vega10_PPTable_Generic_SubTable_Header
-- 
2.42.0