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Tue, 23 Sep 2025 04:14:45 -0700 (PDT) Received: from localhost ([196.207.164.177]) by smtp.gmail.com with UTF8SMTPSA id 5b1f17b1804b1-464f5a285efsm270902105e9.18.2025.09.23.04.14.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 Sep 2025 04:14:44 -0700 (PDT) Date: Tue, 23 Sep 2025 14:14:41 +0300 From: Dan Carpenter To: Christian =?iso-8859-1?Q?K=F6nig?= Cc: Sumit Semwal , Simona Vetter , linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [PATCH] dma-buf: fix reference count leak in dma_buf_poll_add_cb() Message-ID: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline X-Mailer: git-send-email haha only kidding Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Call dma_fence_put(fence) if dma_fence_add_callback() fails. Fixes: 6b51b02a3a0a ("dma-buf: fix and rework dma_buf_poll v7") Signed-off-by: Dan Carpenter --- From code review, not from testing. Please review carefully. drivers/dma-buf/dma-buf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index 2bcf9ceca997..a14e1f50b090 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -301,9 +301,9 @@ static bool dma_buf_poll_add_cb(struct dma_resv *resv, = bool write, fence) { dma_fence_get(fence); r =3D dma_fence_add_callback(fence, &dcb->cb, dma_buf_poll_cb); + dma_fence_put(fence); if (!r) return true; - dma_fence_put(fence); } =20 return false; --=20 2.51.0