From: Roman Li <roman.li@amd.com>
Date: Wed, 13 Mar 2024 22:35:13 +0000 (-0400)
Subject: drm/amd/display: Fix bounds check for dcn35 DcfClocks
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=2f10d4a51bbcd938f1f02f16c304ad1d54717b96;p=linux.git

drm/amd/display: Fix bounds check for dcn35 DcfClocks

[Why]
NumFclkLevelsEnabled is used for DcfClocks bounds check
instead of designated NumDcfClkLevelsEnabled.
That can cause array index out-of-bounds access.

[How]
Use designated variable for dcn35 DcfClocks bounds check.

Fixes: a8edc9cc0b14 ("drm/amd/display: Fix array-index-out-of-bounds in dcn35_clkmgr")
Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Reviewed-by: Sun peng Li <sunpeng.li@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c
index ee5c4ee1ed664..101fe96287cb4 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c
@@ -714,7 +714,7 @@ static void dcn35_clk_mgr_helper_populate_bw_params(struct clk_mgr_internal *clk
 		clock_table->NumFclkLevelsEnabled;
 	max_fclk = find_max_clk_value(clock_table->FclkClocks_Freq, num_fclk);
 
-	num_dcfclk = (clock_table->NumFclkLevelsEnabled > NUM_DCFCLK_DPM_LEVELS) ? NUM_DCFCLK_DPM_LEVELS :
+	num_dcfclk = (clock_table->NumDcfClkLevelsEnabled > NUM_DCFCLK_DPM_LEVELS) ? NUM_DCFCLK_DPM_LEVELS :
 		clock_table->NumDcfClkLevelsEnabled;
 	for (i = 0; i < num_dcfclk; i++) {
 		int j;