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 3FAA1374E6F; Thu, 5 Mar 2026 09:50:52 +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=1772704252; cv=none; b=UCE8sRylCGq3JXgQZFul9fmJg/KGyGLBHuU5Rd5vN2gMKCSTG9tMGWEBAq+iMYPD0yAgb7OjL2VJlpPI9bEXBiFWotqK+zRv/r/QdnBB9iM1uG5udZ4ikIsO8Ai7j2b75zq/EibCgS+2n9dpDYsRCByoMEJcd8fut/IBluMhQ6A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772704252; c=relaxed/simple; bh=IKKUR7hODqTdkx9BPMSFoLoob1mElKenM8VLs7fobdU=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Tuy7I6AhylJwd1QcSyeNDv2Q23tWtthsjxo/XDFXJGYnd8IwH9rh/zWQWHHZ8yTh7lRDY7TRSPVrfPUzYM6sdoLvMTLTYJBcvp4/6MXRKccTplolGa4JY2hmXE/lcqoBRwSAoH8HcC/TGS+bXh5aORGBiZbFtV05ZFClToxfca8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=J5x/l3x+; 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="J5x/l3x+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 82F49C116C6; Thu, 5 Mar 2026 09:50:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772704252; bh=IKKUR7hODqTdkx9BPMSFoLoob1mElKenM8VLs7fobdU=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=J5x/l3x+snJJzZtX3ocpLu77Q/DcI26/Ulrpito2A3A+pLFS+CeSxHvdpfjwOdeA3 ek/z1pQ7RiTI1UdYpWQtglG+/6dzwrsSFpJ0sbmfjrxhgcdQa+NlihlU83DalGebgw V9aNy2rXTuxX4Rf2yRK4C6i5q/sGJLUolM1WZlcumNCVfPP7OSgtGunGkZVB/ofta4 V7g3Skh1U4e6ryOVE6A7ylr8WFH8hdOqfonw248YutGhfXSKRBmmCCqXPJIJcKkaTw ktK+t5xR46jseX3rjzcuw8FrneWVPIO0Lr6nJ8dTbVTu5grWX6cUQl3+Wvk9YwOMy8 iPOxaafDB91Kw== Message-ID: <68ef934f-baa0-4bf6-93d8-834bbc441e66@kernel.org> Date: Thu, 5 Mar 2026 10:50:44 +0100 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] 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: <20260305080354.639-1-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 10:01, Marco Felsch wrote: > Hi Ming, > > 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. >> >> Use __initconst_or_module to keep the data available when built >> as a module while still allowing it to be freed when built-in. > > would be nice if I get at least some credit for pointing to the correct > fix ;) > >> Fixes: e0203ddf9af7 ("media: verisilicon: Avoid G2 bus error while decoding H.264 and HEVC") >> Signed-off-by: Ming Qian > > However, patch looks fine: > > Reviewed-by: Marco Felsch Patch is not correct. This is being referenced from other data where nothing is __init. Section mismatch might not point it, but I don't think the code is readable and actually correct. You can exercise it by rebinding device when built-in. Best regards, Krzysztof