linux-kernel - [PATCH AUTOSEL 6.1 16/61] drm/amdgpu: Fix out-of-bounds write warning

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Message-ID: <20240801002803.3935985-16-sashal@kernel.org>
Date: Wed, 31 Jul 2024 20:25:34 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Ma Jun <Jun.Ma2@....com>,
	Christian König <christian.koenig@....com>,
	Tim Huang <Tim.Huang@....com>,
	Alex Deucher <alexander.deucher@....com>,
	Sasha Levin <sashal@...nel.org>,
	Xinhui.Pan@....com,
	airlied@...il.com,
	daniel@...ll.ch,
	hannes@...xchg.org,
	friedrich.vock@....de,
	andrealmeid@...lia.com,
	amd-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 6.1 16/61] drm/amdgpu: Fix out-of-bounds write warning

From: Ma Jun <Jun.Ma2@....com>

[ Upstream commit be1684930f5262a622d40ce7a6f1423530d87f89 ]

Check the ring type value to fix the out-of-bounds
write warning

Signed-off-by: Ma Jun <Jun.Ma2@....com>
Suggested-by: Christian König <christian.koenig@....com>
Reviewed-by: Tim Huang <Tim.Huang@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
index 2001c7d27a53e..cb73d06e1d38d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
@@ -324,7 +324,7 @@ int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring,
 	ring->max_dw = max_dw;
 	ring->hw_prio = hw_prio;
 
-	if (!ring->no_scheduler) {
+	if (!ring->no_scheduler && ring->funcs->type < AMDGPU_HW_IP_NUM) {
 		hw_ip = ring->funcs->type;
 		num_sched = &adev->gpu_sched[hw_ip][hw_prio].num_scheds;
 		adev->gpu_sched[hw_ip][hw_prio].sched[(*num_sched)++] =
-- 
2.43.0