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Subject[PATCH 4.4 06/43] drm/amdgpu: fix array out of bounds
Date
4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: tom will <os@iscas.ac.cn>

commit 484f689fc9d4eb91c68f53e97dc355b1b06c3edb upstream.

When the initial value of i is greater than zero,
it may cause endless loop, resulting in array out
of bounds, fix it.

This is a port of the radeon fix to amdgpu.

Signed-off-by: tom will <os@iscas.ac.cn>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/gpu/drm/amd/amdgpu/kv_dpm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/amd/amdgpu/kv_dpm.c
+++ b/drivers/gpu/drm/amd/amdgpu/kv_dpm.c
@@ -2258,7 +2258,7 @@ static void kv_apply_state_adjust_rules(
if (pi->caps_stable_p_state) {
stable_p_state_sclk = (max_limits->sclk * 75) / 100;

- for (i = table->count - 1; i >= 0; i++) {
+ for (i = table->count - 1; i >= 0; i--) {
if (stable_p_state_sclk >= table->entries[i].clk) {
stable_p_state_sclk = table->entries[i].clk;
break;

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