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drm/amd/display: Ensure HPD source index is valid for dcn20/dcn201 link encoders

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This patch adds a boundary check for the hpd_source index during the
link encoder creation process for dcn20/dcn201 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>
This commit is contained in:
Srinivasan Shanmugam 2024-10-15 20:42:39 +05:30 committed by Alex Deucher
parent df9174ef4a
commit 40d7299c72
2 changed files with 2 additions and 2 deletions
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2
drivers/gpu/drm/amd/display/dc/resource/dcn20/dcn20_resource.c
View File

@ -920,7 +920,7 @@ struct link_encoder *dcn20_link_encoder_create(
kzalloc(sizeof(struct dcn20_link_encoder), GFP_KERNEL);
int link_regs_id;
if (!enc20)
if (!enc20 || enc_init_data->hpd_source >= ARRAY_SIZE(link_enc_hpd_regs))
return NULL;
link_regs_id =

2
drivers/gpu/drm/amd/display/dc/resource/dcn201/dcn201_resource.c
View File

@ -797,7 +797,7 @@ static struct link_encoder *dcn201_link_encoder_create(
kzalloc(sizeof(struct dcn20_link_encoder), GFP_ATOMIC);
struct dcn10_link_encoder *enc10;
if (!enc20)
if (!enc20 || enc_init_data->hpd_source >= ARRAY_SIZE(link_enc_hpd_regs))
return NULL;
enc10 = &enc20->enc10;