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 1118321ABC9; Thu, 5 Mar 2026 12:04:24 +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=1772712265; cv=none; b=KbliITki7uMtfzWXwgyrJFDt3kx5ym1kqU/oIa9DQURHhxfuejuF7U7GgMyuseSNhuJFx3NnBTntUfS75sws3sQjDCvJElrKkQhs+kPl/4VIGxKdnC0+9LMCD2PjHP2i/8lGoWDaM07JYQGIXfpFt3BzgRA/tMsIg5fqSbwXQpA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772712265; c=relaxed/simple; bh=8lb0JikjFw000yfEY9T0tVhVJv64G4s9OgYKgvPLq7Y=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=n/mGD+1CdPmPqTQvxkFzU3oj7tTfUAU0xJxfOn7G1HZfIhltHO6iznkD6yowR/RUOWhghal1Rrx2MyjQXcGZb07p+40451O7cmKhhzkng/GJgC5P7BycnESYzNoT5/ykf/bcIgffrGSOPAMp2ulseUG8WW64NMKEVlG5eDdD31E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=paod7/ON; 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="paod7/ON" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EFEF3C116C6; Thu, 5 Mar 2026 12:04:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772712264; bh=8lb0JikjFw000yfEY9T0tVhVJv64G4s9OgYKgvPLq7Y=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=paod7/ONRccNk2YBivmahOlJvWBcy+Yikb6NgV40ON5FCjsemhRmqO3FWLdW1kaqG FZ1pozwP9EKiNxixfjEJ7jTOFVjzDUKeOH6hth+oL67l5tdTo5MWMrk0xZLbV8WPSf MESJmCiwg0e3f8rDk354gFbOhviyK3EIr7yEcXWrQBeqrEwLk7/nD8so1vDH47+9E9 mR5nzHr9Y+gdaC4eTtO/3lcRanrZodQ1inWqThNLtgbeYov7icTZ6U7LHj/1BciqIr SUb9Y12nyR5gSs1qWxBwikCGphbXU/wnxDvQUXEV1ybLaKpE0r9/UgV9QDyRGa5uoU qKURfu10cp4Bg== Message-ID: <4eaae784-3730-4a9b-a94d-d0343c6b31c7@kernel.org> Date: Thu, 5 Mar 2026 13:04:16 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] media: verisilicon: Fix kernel panic due to __initconst misuse To: Marco Felsch , ming.qian@oss.nxp.com Cc: linux-media@vger.kernel.org, mchehab@kernel.org, hverkuil-cisco@xs4all.nl, nicolas@ndufresne.ca, benjamin.gaignard@collabora.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, p.zabel@pengutronix.de, sebastian.fricke@collabora.com, shawnguo@kernel.org, ulf.hansson@linaro.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, fra.schnyder@gmail.com, linux-imx@nxp.com, l.stach@pengutronix.de, Frank.li@nxp.com, peng.fan@nxp.com, eagle.zhou@nxp.com, devicetree@vger.kernel.org, imx@lists.linux.dev, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org References: <20260305100149.722-1-ming.qian@oss.nxp.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 05/03/2026 11:32, Marco Felsch wrote: > On 26-03-05, ming.qian@oss.nxp.com wrote: >> From: Ming Qian >> >> Fix a kernel panic when probing the driver as a module: >> >> Unable to handle kernel paging request at virtual address >> ffffd9c18eb05000 >> of_find_matching_node_and_match+0x5c/0x1a0 >> hantro_probe+0x2f4/0x7d0 [hantro_vpu] >> >> The imx8mq_vpu_shared_resources array is referenced by variant >> structures through their shared_devices field. When built as a >> module, __initconst causes this data to be freed after module >> init, but it's later accessed during probe, causing a page fault. >> >> The imx8mq_vpu_shared_resources is referenced from non-init code, >> so keeping __initconst or __initconst_or_module here is wrong. >> >> Drop the __initconst annotation and let it live in the normal .rodata >> section. >> >> Fixes: e0203ddf9af7 ("media: verisilicon: Avoid G2 bus error while decoding H.264 and HEVC") >> Reported-by: Franz Schnyder >> Closes: https://lore.kernel.org/all/n3qmcb62tepxltoskpf7ws6yiirc2so62ia23b42rj3wlmpl67@rvkbuirx7kkp/ >> Suggested-by: Marco Felsch > > This fix was suggested by Krzysztof :) Or at least a bug of __initconst called from regular non-init probe code leading to bugs during probe deferrals or during unbind-bind cycles... Closes: https://lore.kernel.org/all/68ef934f-baa0-4bf6-93d8-834bbc441e66@kernel.org/ Reported-by: Krzysztof Kozlowski ? Best regards, Krzysztof