drm/amd/display: Add hpd_source index out-of-bounds check for dcn3x l…

…ink encoder creation

This patch adds a boundary check for the hpd_source index during the
link encoder creation process for dcn3x IP's. The check ensures that the
index is within the valid range of the link_enc_hpd_regs array to
prevent out-of-bounds access.

Cc: Tom Chung <chiahsuan.chung@amd.com>
Cc: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Cc: Roman Li <roman.li@amd.com>
Cc: Alex Hung <alex.hung@amd.com>
Cc: Aurabindo Pillai <aurabindo.pillai@amd.com>
Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Roman Li <roman.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/resource/dcn30/dcn30_resource.c

@@ -927,7 +927,7 @@ static struct link_encoder *dcn30_link_encoder_create(
 	struct dcn20_link_encoder *enc20 =
 		kzalloc(sizeof(struct dcn20_link_encoder), GFP_KERNEL);
 
-	if (!enc20)
+	if (!enc20 || enc_init_data->hpd_source >= ARRAY_SIZE(link_enc_hpd_regs))
 		return NULL;
 
 	dcn30_link_encoder_construct(enc20,

drivers/gpu/drm/amd/display/dc/resource/dcn301/dcn301_resource.c

@@ -883,7 +883,7 @@ static struct link_encoder *dcn301_link_encoder_create(
 	struct dcn20_link_encoder *enc20 =
 		kzalloc(sizeof(struct dcn20_link_encoder), GFP_KERNEL);
 
-	if (!enc20)
+	if (!enc20 || enc_init_data->hpd_source >= ARRAY_SIZE(link_enc_hpd_regs))
 		return NULL;
 
 	dcn301_link_encoder_construct(enc20,

drivers/gpu/drm/amd/display/dc/resource/dcn302/dcn302_resource.c

@@ -893,7 +893,7 @@ static struct link_encoder *dcn302_link_encoder_create(
 {
 	struct dcn20_link_encoder *enc20 = kzalloc(sizeof(struct dcn20_link_encoder), GFP_KERNEL);
 
-	if (!enc20)
+	if (!enc20 || enc_init_data->hpd_source >= ARRAY_SIZE(link_enc_hpd_regs))
 		return NULL;
 
 	dcn30_link_encoder_construct(enc20, enc_init_data, &link_enc_feature,

drivers/gpu/drm/amd/display/dc/resource/dcn303/dcn303_resource.c

@@ -839,7 +839,7 @@ static struct link_encoder *dcn303_link_encoder_create(
 {
 	struct dcn20_link_encoder *enc20 = kzalloc(sizeof(struct dcn20_link_encoder), GFP_KERNEL);
 
-	if (!enc20)
+	if (!enc20 || enc_init_data->hpd_source >= ARRAY_SIZE(link_enc_hpd_regs))
 		return NULL;
 
 	dcn30_link_encoder_construct(enc20, enc_init_data, &link_enc_feature,

drivers/gpu/drm/amd/display/dc/resource/dcn31/dcn31_resource.c

@@ -1093,7 +1093,7 @@ static struct link_encoder *dcn31_link_encoder_create(
 	struct dcn20_link_encoder *enc20 =
 		kzalloc(sizeof(struct dcn20_link_encoder), GFP_KERNEL);
 
-	if (!enc20)
+	if (!enc20 || enc_init_data->hpd_source >= ARRAY_SIZE(link_enc_hpd_regs))
 		return NULL;
 
 	dcn31_link_encoder_construct(enc20,

drivers/gpu/drm/amd/display/dc/resource/dcn314/dcn314_resource.c

@@ -1149,7 +1149,7 @@ static struct link_encoder *dcn31_link_encoder_create(
 	struct dcn20_link_encoder *enc20 =
 		kzalloc(sizeof(struct dcn20_link_encoder), GFP_KERNEL);
 
-	if (!enc20)
+	if (!enc20 || enc_init_data->hpd_source >= ARRAY_SIZE(link_enc_hpd_regs))
 		return NULL;
 
 	dcn31_link_encoder_construct(enc20,

drivers/gpu/drm/amd/display/dc/resource/dcn315/dcn315_resource.c

@@ -1091,7 +1091,7 @@ static struct link_encoder *dcn31_link_encoder_create(
 	struct dcn20_link_encoder *enc20 =
 		kzalloc(sizeof(struct dcn20_link_encoder), GFP_KERNEL);
 
-	if (!enc20)
+	if (!enc20 || enc_init_data->hpd_source >= ARRAY_SIZE(link_enc_hpd_regs))
 		return NULL;
 
 	dcn31_link_encoder_construct(enc20,

drivers/gpu/drm/amd/display/dc/resource/dcn316/dcn316_resource.c

@@ -1085,7 +1085,7 @@ static struct link_encoder *dcn31_link_encoder_create(
 	struct dcn20_link_encoder *enc20 =
 		kzalloc(sizeof(struct dcn20_link_encoder), GFP_KERNEL);
 
-	if (!enc20)
+	if (!enc20 || enc_init_data->hpd_source >= ARRAY_SIZE(link_enc_hpd_regs))
 		return NULL;
 
 	dcn31_link_encoder_construct(enc20,

drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource.c

@@ -1039,7 +1039,7 @@ static struct link_encoder *dcn32_link_encoder_create(
 	struct dcn20_link_encoder *enc20 =
 		kzalloc(sizeof(struct dcn20_link_encoder), GFP_KERNEL);
 
-	if (!enc20)
+	if (!enc20 || enc_init_data->hpd_source >= ARRAY_SIZE(link_enc_hpd_regs))
 		return NULL;
 
 #undef REG_STRUCT

drivers/gpu/drm/amd/display/dc/resource/dcn321/dcn321_resource.c

@@ -1035,7 +1035,7 @@ static struct link_encoder *dcn321_link_encoder_create(
 	struct dcn20_link_encoder *enc20 =
 		kzalloc(sizeof(struct dcn20_link_encoder), GFP_KERNEL);
 
-	if (!enc20)
+	if (!enc20 || enc_init_data->hpd_source >= ARRAY_SIZE(link_enc_hpd_regs))
 		return NULL;
 
 #undef REG_STRUCT

drivers/gpu/drm/amd/display/dc/resource/dcn35/dcn35_resource.c

@@ -1074,7 +1074,7 @@ static struct link_encoder *dcn35_link_encoder_create(
 	struct dcn20_link_encoder *enc20 =
 		kzalloc(sizeof(struct dcn20_link_encoder), GFP_KERNEL);
 
-	if (!enc20)
+	if (!enc20 || enc_init_data->hpd_source >= ARRAY_SIZE(link_enc_hpd_regs))
 		return NULL;
 
 #undef REG_STRUCT

drivers/gpu/drm/amd/display/dc/resource/dcn351/dcn351_resource.c

@@ -1054,7 +1054,7 @@ static struct link_encoder *dcn35_link_encoder_create(
 	struct dcn20_link_encoder *enc20 =
 		kzalloc(sizeof(struct dcn20_link_encoder), GFP_KERNEL);
 
-	if (!enc20)
+	if (!enc20 || enc_init_data->hpd_source >= ARRAY_SIZE(link_enc_hpd_regs))
 		return NULL;
 
 #undef REG_STRUCT