linux-kernel - [PATCH 4.19 36/50] dma-buf: balance refcount inbalance

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Message-Id: <20190726152304.356080005@linuxfoundation.org>
Date:   Fri, 26 Jul 2019 17:25:11 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Jérôme Glisse <jglisse@...hat.com>,
        Christian König <christian.koenig@....com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        linux-media@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linaro-mm-sig@...ts.linaro.org,
        Stéphane Marchesin <marcheu@...omium.org>
Subject: [PATCH 4.19 36/50] dma-buf: balance refcount inbalance

From: Jérôme Glisse <jglisse@...hat.com>

commit 5e383a9798990c69fc759a4930de224bb497e62c upstream.

The debugfs take reference on fence without dropping them.

Signed-off-by: Jérôme Glisse <jglisse@...hat.com>
Cc: Christian König <christian.koenig@....com>
Cc: Daniel Vetter <daniel.vetter@...ll.ch>
Cc: Sumit Semwal <sumit.semwal@...aro.org>
Cc: linux-media@...r.kernel.org
Cc: dri-devel@...ts.freedesktop.org
Cc: linaro-mm-sig@...ts.linaro.org
Cc: Stéphane Marchesin <marcheu@...omium.org>
Cc: stable@...r.kernel.org
Reviewed-by: Christian König <christian.koenig@....com>
Signed-off-by: Sumit Semwal <sumit.semwal@...aro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20181206161840.6578-1-jglisse@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/dma-buf/dma-buf.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -1069,6 +1069,7 @@ static int dma_buf_debug_show(struct seq
 				   fence->ops->get_driver_name(fence),
 				   fence->ops->get_timeline_name(fence),
 				   dma_fence_is_signaled(fence) ? "" : "un");
+			dma_fence_put(fence);
 		}
 		rcu_read_unlock();