From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sg-2-1.ptr.blmpb.com (sg-2-1.ptr.blmpb.com [71.18.227.1]) (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 7B0FB388876 for ; Mon, 24 Aug 2026 19:34:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=71.18.227.1 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787600090; cv=none; b=MxmAm1bOZIVEVXxWZr7WqoLfn1Xy8qeDRNUhfmzoCYplNVAO8HRRVE2mcxfo6O0kTEeB1R5MSNIZNolrOFTj0Pr3EaXT9aBk3rWU3T8/9z0seOr0ZIrJH21pvfHC92ZMdk2yjw/TEQiAA1CyBiAIjRO9Z8Rv7L0h6MSxTyzgULc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787600090; c=relaxed/simple; bh=lUMS82M+cyaQU2dClb4aMl4BxhiXa1LhP0YFDWcWdBw=; h=Subject:In-Reply-To:From:References:Cc:Mime-Version:Content-Type: To:Date:Message-Id; b=CmwbeORtM+xXK2Gj3y2NOiswHG5NBGuhx+AA6SEnZ8sDQv4qAXZjN63INcygYkCRKk9Y7BUywPwDgsEWPB1H0S4+eqk7usPnoPgowbB06ZCcZJyxR38xokteQJ37/h9kFmLHuA+gTgLUKcaiMQsgrTgIIUVSIwwn9OatK80TVNY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=cherr.cc; spf=pass smtp.mailfrom=cherr.cc; dkim=pass (2048-bit key) header.d=cherr.cc header.i=@cherr.cc header.b=xTIl7Njw; arc=none smtp.client-ip=71.18.227.1 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=cherr.cc Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=cherr.cc Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=cherr.cc header.i=@cherr.cc header.b="xTIl7Njw" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; s=feishu2604220257; d=cherr.cc; t=1787600082; h=from:subject: mime-version:from:date:message-id:subject:to:cc:reply-to:content-type: mime-version:in-reply-to:message-id; bh=G2ERPFIrOa+gDnsmMFvcRecBvtEZUGxg6dBSiPNWMUk=; b=xTIl7NjwTnuivp6bfW656TfpVRSSSTXptfLdk2s8Yba7gWvdY2s4jkDcDljDxMfgGnnbvQ FLUzyjET8n0yY5l3Z0FLEHJdmsLaFDDlQYv+TT50PCy4U1+Ge1X3j6UbX/izAJf+eAFjpL fhPo7LQF82pDRa+nhbOhJwFyQ4xY9fBLWc4HpC9DjyCYFEOMA4CjESS4DqSXpnBEaLeUvF CoLrCbX61D577fpcHOmvgDuLn87YSkvIYO8eGRz61ajHFR7ftwrDQLQkFBTAX5vOJs3vtO jbyG8OMKIc347W4bCZtmllBJIRCaDbtsXNejtYzbh6OQK54mMJpTUEceZH9DoQ== Subject: [PATCH 2/3] media: verisilicon: hantro: cancel watchdog work before m2m release X-Mailer: b4 0.14.2 Received: from [192.168.9.107] ([111.42.148.163]) by smtp.feishu.cn with ESMTPS; Tue, 25 Aug 2026 03:34:40 +0800 X-Original-From: Shengzhuo Wei In-Reply-To: <20260825-media-timeout-work-v1-0-ebfebbeb6c31@cherr.cc> From: "Shengzhuo Wei" References: <20260825-media-timeout-work-v1-0-ebfebbeb6c31@cherr.cc> Cc: , , , , "Shengzhuo Wei" Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 To: "Mirela Rabulea" , "Mauro Carvalho Chehab" , "Frank Li" , "Sascha Hauer" , "Pengutronix Kernel Team" , "Fabio Estevam" , "Hans Verkuil" , "Ming Qian" , "Nicolas Dufresne" , "Benjamin Gaignard" , "Philipp Zabel" , "Ezequiel Garcia" , "Bin Liu" , "Matthias Brugger" , "AngeloGioacchino Del Regno" , "irui wang" , "kyrie wu" Date: Tue, 25 Aug 2026 03:34:31 +0800 Message-Id: <20260825-media-timeout-work-v1-2-ebfebbeb6c31@cherr.cc> X-Lms-Return-Path: Content-Transfer-Encoding: 7bit Each job arms vpu->watchdog_work, cancelled only by the job-completion path. If a job stalls, hantro_remove() drops the last reference to vpu->m2m_dev via v4l2_m2m_put() with the watchdog still pending, and hantro_watchdog() then dereferences the freed m2m_dev -- a use-after-free. Drain the watchdog before the m2m device is released. Fixes: 775fec69008d ("media: add Rockchip VPU JPEG encoder driver") Cc: stable@vger.kernel.org Signed-off-by: Shengzhuo Wei Assisted-by: GLM:5.3 --- drivers/media/platform/verisilicon/hantro_drv.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/media/platform/verisilicon/hantro_drv.c b/drivers/media/platform/verisilicon/hantro_drv.c index 2e81877f640fb429b18d2f4fd64bc0c392cf600e..1b04b98371a48184f390a13791243fd00d6b80ef 100644 --- a/drivers/media/platform/verisilicon/hantro_drv.c +++ b/drivers/media/platform/verisilicon/hantro_drv.c @@ -1284,6 +1284,7 @@ static void hantro_remove(struct platform_device *pdev) hantro_remove_dec_func(vpu); hantro_remove_enc_func(vpu); media_device_cleanup(&vpu->mdev); + cancel_delayed_work_sync(&vpu->watchdog_work); v4l2_m2m_put(vpu->m2m_dev); v4l2_device_unregister(&vpu->v4l2_dev); clk_bulk_unprepare(vpu->variant->num_clocks, vpu->clocks); -- 2.47.3