From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f54.google.com (mail-wm1-f54.google.com [209.85.128.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A9AEB19D8BC for ; Tue, 23 Sep 2025 11:14:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.54 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758626088; cv=none; b=sigBBm/qzfM8qxbpcPMe9XDq1p3ocwLgvXDqu3+KE4lyDNwDTT7jEbuX/t4Tvzb7uYblz4+XVsVW96rthnyen9FLE5/D7pTO9lSIBkKRthZAdKKEf7cpaKJUhJ+8Z3gzHcR87LmwWbSiag1E79QOnV6WVay/mnOX45SU2r+QgZo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758626088; c=relaxed/simple; bh=YptwYi2KhyqTs2MPDUowQsobfWUXyvNShpVbrq//inw=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=rKTbt/Lw21oy+SGD1/Yj++0Fmgz0DWx5TxKdzEnecT1D7UFe7xJFKvX87lGTJCr1YZWtJEi5KfMqKlVKNL2F57r1O2zLtlSWJWDmZWIAuaN0t/HCIfG1FLF533DVXXYVZDn+n/fnGK2HqDhReEFiHyIF2FCeXfoohqsga9F+D5E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=o0PqUndd; arc=none smtp.client-ip=209.85.128.54 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="o0PqUndd" Received: by mail-wm1-f54.google.com with SMTP id 5b1f17b1804b1-45dd505a1dfso38530035e9.2 for ; Tue, 23 Sep 2025 04:14:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1758626085; x=1759230885; darn=vger.kernel.org; h=content-disposition:mime-version:message-id:subject:cc:to:from:date :from:to:cc:subject:date:message-id:reply-to; bh=veRQoXTOP5jOH7336MItrAXBwCoB6ZB/LrxpVKH7RUg=; b=o0PqUnddSAS6bInqUUA6bb5FZBQvq8yHaQJuN0nfxLYkcqvfG5vgDd3MA0uKxSo8R8 9A47geBU6a/EmrK2quEftVqzHyTIr6M8BTSEtzbcsQXrqTzRJi8wbCz6YHMEAoTEl9dr nF5lofTZwRwrK9aNRXOoIsJGmF7AL/AIBdI9rRtE/MEvk4i7ZNCt2Wl9itowgfz7q4Dl IbDJDm5NLn7P/TAtKi2RSxEgBvHbcjfETZympUEIemBvMnHZfiIORqxPxHQUm2wjSmDT V7isVuffOzb+qy28ghGfujLf4pmCPAZZ91mo8VL8NPChgMKry/0wdtDfstToqZqcSKPI JYSQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1758626085; x=1759230885; h=content-disposition:mime-version:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=veRQoXTOP5jOH7336MItrAXBwCoB6ZB/LrxpVKH7RUg=; b=LO2i7EaZM4AjXhFPsj9onD2WeLr2cCLO/Tlw9ijk82U2WbN2Brhduaz6gD5pcnpqvz hcAOh7/2kdnzM0zHwmX2XflgfExibHQ7ag7c7kKVxn00JVn1kqBSqBcooNUmf6PQSRa6 he6ViRmkX2j0zz9nEzMHgghq4V7UsmH7CByxgkYDHO1hdVZ3h+4ZxNHCKnU12FMQ6V5E agQFbtWBQ3uTEvAzP3kY+P7pVT7v3B0k8tBTnid6Cxx7dCqlK6aJscgfgqZ7TGPDRFnV 98lrM63t9geM7D7G9wRLJREf12YqYscim/18r3TFoAOZcFYDmCVAaxNkGtWyYEV1Nhnn im0Q== X-Forwarded-Encrypted: i=1; AJvYcCVQkH3vJ9w9s0uGw17TOeVzU9rI/YUi7iyLggApRBqfvjIjMZwNH9dOhv7sW6vIEspY/25jd1GBInCQBpEa5Xo=@vger.kernel.org X-Gm-Message-State: AOJu0YwJTYOlEIrE9+auh2vEkDMVbpBDSz5I2PfiW+SvqbEEKYbHfIqv wX0i4xxI/ZJTD5fuJddHi5E8C17mLcW106mbjj1aW58naIl3TcW/c5ZIOygWY6r4hqM= X-Gm-Gg: ASbGncuYDhnalZ0ZjyZwI6pYSGvANBm5mLJygL3deErriF4XeVF+UxhlrKCPa6bwix7 /UPN4jReMHSXufwOsbWW3oALOHOJ3JjL4fu3s6hQWC7dv0xfHdd2cXyFIhRRRMWdup6Va/F9c52 B/15YZBG9ZN4lDgfuZ60tICxL4+Qe3XScfROo0oBxJvAeDPcfHvP0xbGix5KTFhsAWOk9/RzUuL j+C5Jo6wEm8cM95lgqEyjHvI79Z6VXcTmqCyIpnsGze9wqjE5+e5nuMuej9eo5MZs45LKEOC1+n i60imOThbyrkLACVNdPcci3yquGp4mozQjC3RQ7p7TflOJI3tPrdz0xd/88G6dwnhK46ivwToZ3 dJe6cE0g2pIM9Qf3cDLp/PqxZJPKV X-Google-Smtp-Source: AGHT+IGNA4ZE/G6xv8PAXiFATMi0x7yx2B6IdUPeinnVHdHE221ujk0cX1DYaOF+khzLyUivuysi8g== X-Received: by 2002:a05:600c:3145:b0:45d:f804:bcda with SMTP id 5b1f17b1804b1-46e1d9817dbmr22553515e9.13.1758626085008; 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: kernel-janitors@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Mailer: git-send-email haha only kidding 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 = dma_fence_add_callback(fence, &dcb->cb, dma_buf_poll_cb); + dma_fence_put(fence); if (!r) return true; - dma_fence_put(fence); } return false; -- 2.51.0