From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6CE1D127E3B; Mon, 6 May 2024 07:33:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714980839; cv=none; b=nrN45KreTq99WaIWRgaad4Pfuq6utEM0STu5LZiWIa8oMIencsFqyM0rRqaY00CV6XI/PvpT4zhzQ44psq58I5yKLkwDO6+EvWe3r1Qcc9WEzYZ/34vMIBLGkauFd/36bfHHbUYxJjFbF99T5PkjKVRveCdgocnGzvLfLsZHC1c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714980839; c=relaxed/simple; bh=6XLNTdDOjYZV+7BSZ8kYvHCZIOmfDSjbk8qhhZ/HN98=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=tDKt+BtRhAI004FqlSStLGoZEBtvjt9ENFDROytLkZU1gHO5r9eHDcebIhoDVQobLlK5v29xYEtShdxO5etZGOqmKMBKhbnVDMaUIzay7cOVG5W/+Q9vw7h0ZMql0UQ70NVDSmjldQwqC1NJzopEczregH/Yjc2+0ry/IEgIwVI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=oOQe5kMT; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="oOQe5kMT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2F6B6C116B1; Mon, 6 May 2024 07:33:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1714980838; bh=6XLNTdDOjYZV+7BSZ8kYvHCZIOmfDSjbk8qhhZ/HN98=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=oOQe5kMTblXJZ1LDCM4efVpiMDYgCPv9n4nmCcDqnsOCcoINVq/I8EYAU70iCFESU 6iRbzA2fucAjcO4Y5v6Yh2RRUPXk/8yO4g4fkYljfz3F/4/LbZ2pbgkZSifQOrwzVC DtWG0CFNb6tksiEkIm5+/UYWKdX8v8U13M4r2QBkjzaofiVVlpJkpwxj07SOAqkZRE 6xOGO2bCXFxCEsIwMXyiqQ0RV3T57ab8R9Osjqn4vmqKNNNvWHqitQ9FcBwi1sXgWj 20UeGVq3oC1PLysvApckZumwIPjFquUgyomPXJQEKXIbKkqjh91BLyr40SOK5hmuTw 9DPLK1r/TcoYA== Message-ID: <94e7366f-e791-4abf-b20d-4c7a1eed3b48@kernel.org> Date: Mon, 6 May 2024 09:33:52 +0200 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3] media: venus: fix use after free in vdec_close To: Dikshita Agarwal , Stanimir Varbanov , Vikash Garodia , Bjorn Andersson , Konrad Dybcio , Mauro Carvalho Chehab , Hans Verkuil Cc: Bryan O'Donoghue , Stanimir Varbanov , linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org References: <1714975133-1777-1-git-send-email-quic_dikshita@quicinc.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 06/05/2024 07:58, Dikshita Agarwal wrote: > There appears to be a possible use after free with vdec_close(). > The firmware will add buffer release work to the work queue through > HFI callbacks as a normal part of decoding. Randomly closing the > decoder device from userspace during normal decoding can incur > a read after free for inst. > > Fix it by cancelling the work in vdec_close. > > Cc: stable@vger.kernel.org > Fixes: af2c3834c ("media: venus: adding core part and helper functions") Please run scripts/checkpatch.pl and fix reported warnings. Then please run `scripts/checkpatch.pl --strict` and (probably) fix more warnings. Some warnings can be ignored, especially from --strict run, but the code here looks like it needs a fix. Feel free to get in touch if the warning is not clear. This is written in your instruction - go/upstream - so be sure you always follow it fully. Best regards, Krzysztof