From: jsg <jsg@openbsd.org>
Date: Mon, 17 Jun 2024 07:21:57 +0000 (+0000)
Subject: drm/amdgpu: add error handle to avoid out-of-bounds
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=61dfecf3d1fafb5549a25f5a83a61f701863afb1;p=openbsd

drm/amdgpu: add error handle to avoid out-of-bounds

From Bob Zhou
5b0a3dc3e87821acb80e841b464d335aff242691 in linux-6.6.y/6.6.34
8b2faf1a4f3b6c748c0da36cda865a226534d520 in mainline linux
---

diff --git a/sys/dev/pci/drm/amd/amdgpu/sdma_v4_0.c b/sys/dev/pci/drm/amd/amdgpu/sdma_v4_0.c
index 5854767cc75..b5d62cef573 100644
--- a/sys/dev/pci/drm/amd/amdgpu/sdma_v4_0.c
+++ b/sys/dev/pci/drm/amd/amdgpu/sdma_v4_0.c
@@ -2031,6 +2031,9 @@ static int sdma_v4_0_process_trap_irq(struct amdgpu_device *adev,
 
 	DRM_DEBUG("IH: SDMA trap\n");
 	instance = sdma_v4_0_irq_id_to_seq(entry->client_id);
+	if (instance < 0)
+		return instance;
+
 	switch (entry->ring_id) {
 	case 0:
 		amdgpu_fence_process(&adev->sdma.instance[instance].ring);