From 4b25e737cfc7f2ade956df3c747a7dd2ff1e2774 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Tue, 7 Aug 2018 09:46:02 +0300 Subject: [PATCH] drm/i915/gvt: Off by one in intel_vgpu_write_fence() The > should be >= here so that we don't read one element beyond the end of the array. Fixes: 28a60dee2ce6 ("drm/i915/gvt: vGPU HW resource management") Signed-off-by: Dan Carpenter Reviewed-by: Rodrigo Vivi Signed-off-by: Zhenyu Wang --- drivers/gpu/drm/i915/gvt/aperture_gm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gvt/aperture_gm.c b/drivers/gpu/drm/i915/gvt/aperture_gm.c index 380eeb2a..fe75402 100644 --- a/drivers/gpu/drm/i915/gvt/aperture_gm.c +++ b/drivers/gpu/drm/i915/gvt/aperture_gm.c @@ -131,7 +131,7 @@ void intel_vgpu_write_fence(struct intel_vgpu *vgpu, assert_rpm_wakelock_held(dev_priv); - if (WARN_ON(fence > vgpu_fence_sz(vgpu))) + if (WARN_ON(fence >= vgpu_fence_sz(vgpu))) return; reg = vgpu->fence.regs[fence]; -- 2.7.4