From 381cd670a17b54420b6c36a005783fe7d6005b2c Mon Sep 17 00:00:00 2001
From: Peikang Zhang <peikang.zhang@amd.com>
Date: Mon, 20 Jan 2020 09:25:15 -0500
Subject: drm/amd/display: dc_get_vmid_use_vector() crashes when get called
Git-commit: 68bbca15e7062f4ae16531e29893f78d0b4840b6
Patch-mainline: v5.7-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322
[Why]
int i can go out of boundary which will cause crash
[How]
Fixed the maximum value of i to avoid i going out of boundary
Signed-off-by: Peikang Zhang <peikang.zhang@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/amd/display/dc/core/dc_vm_helper.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_vm_helper.c b/drivers/gpu/drm/amd/display/dc/core/dc_vm_helper.c
index a96d8de9380e..f2b39ec35c89 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_vm_helper.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_vm_helper.c
@@ -62,7 +62,7 @@ int dc_get_vmid_use_vector(struct dc *dc)
int i;
int in_use = 0;
- for (i = 0; i < dc->vm_helper->num_vmid; i++)
+ for (i = 0; i < MAX_HUBP; i++)
in_use |= dc->vm_helper->hubp_vmid_usage[i].vmid_usage[0]
| dc->vm_helper->hubp_vmid_usage[i].vmid_usage[1];
return in_use;
--
2.28.0