Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Chen Tao <chentao107@huawei.com>
To:     <airlied@linux.ie>, <daniel@ffwll.ch>
CC:     <alexander.deucher@amd.com>, <christian.koenig@amd.com>,
        <David1.Zhou@amd.com>, <tom.stdenis@amd.com>, <Jack.Xiao@amd.com>,
        <yttao@amd.com>, <amd-gfx@lists.freedesktop.org>,
        <dri-devel@lists.freedesktop.org>, <linux-kernel@vger.kernel.org>,
        <chentao107@huawei.com>
Subject: [PATCH 2/2] drm/amdgpu/debugfs: fix memory leak when amdgpu_virt_enable_access_debugfs failed
Date:   Tue, 16 Jun 2020 14:30:39 +0800
Message-ID: <20200616063039.260990-2-chentao107@huawei.com>
In-Reply-To: <20200616063039.260990-1-chentao107@huawei.com>
References: <20200616063039.260990-1-chentao107@huawei.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 7BIT
Content-Type:   text/plain; charset=US-ASCII
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Fix memory leak in amdgpu_debugfs_gpr_read not freeing data when
amdgpu_virt_enable_access_debugfs failed.

Fixes: 95a2f917387a2 ("drm/amdgpu: restrict debugfs register accessunder SR-IOV")
Signed-off-by: Chen Tao <chentao107@huawei.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
index bea8c36a53a4..f66ee4b8f04e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
@@ -868,8 +868,10 @@ static ssize_t amdgpu_debugfs_gpr_read(struct file *f, char __user *buf,
 	}
 
 	r = amdgpu_virt_enable_access_debugfs(adev);
-	if (r < 0)
+	if (r < 0) {
+		kfree(data);
 		return r;
+	}
 
 	/* switch to the specific se/sh/cu */
 	mutex_lock(&adev->grbm_idx_mutex);
-- 
2.22.0