Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Qiujun Huang <hqjagain@gmail.com>
To:     maarten.lankhorst@linux.intel.com, mripard@kernel.org,
        airlied@linux.ie, daniel@ffwll.ch
Cc:     dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
        Qiujun Huang <hqjagain@gmail.com>
Subject: [PATCH] drm/lease: fix WARNING in idr_destroy
Date:   Mon, 16 Mar 2020 11:36:08 +0800
Message-Id: <1584329768-16119-1-git-send-email-hqjagain@gmail.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

leases has been destroyed:
drm_master_put
    ->drm_master_destroy
            ->idr_destroy

so the "out_lessee" needn't to call idr_destroy again.

Reported-and-tested-by: syzbot+05835159fe322770fe3d@syzkaller.appspotmail.com
Signed-off-by: Qiujun Huang <hqjagain@gmail.com>
---
 drivers/gpu/drm/drm_lease.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_lease.c b/drivers/gpu/drm/drm_lease.c
index b481caf..54506c2 100644
--- a/drivers/gpu/drm/drm_lease.c
+++ b/drivers/gpu/drm/drm_lease.c
@@ -577,11 +577,14 @@ int drm_mode_create_lease_ioctl(struct drm_device *dev,
 
 out_lessee:
 	drm_master_put(&lessee);
+	goto err_exit;
 
 out_leases:
-	put_unused_fd(fd);
 	idr_destroy(&leases);
 
+err_exit:
+	put_unused_fd(fd);
+
 	DRM_DEBUG_LEASE("drm_mode_create_lease_ioctl failed: %d\n", ret);
 	return ret;
 }
-- 
1.8.3.1