diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
index eef025e7282a203ff9e265faa3eeea2a8a2c4fe6..88d0a8d3fbbe3c6e079cb0161423a181fbd7d4ee 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
@@ -522,7 +522,7 @@ static ssize_t amdgpu_debugfs_regs_pcie_read(struct file *f, char __user *buf,
 	ssize_t result = 0;
 	int r;
 
-	if (size & 0x3 || *pos & 0x3)
+	if (size > 4096 || size & 0x3 || *pos & 0x3)
 		return -EINVAL;
 
 	r = pm_runtime_get_sync(adev_to_drm(adev)->dev);