From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 90516EDA697 for ; Thu, 5 Mar 2026 09:19:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=5QKDaJoEG5rhXl9OLUkgGqcFbjV5uid1Fbvzp4ssxj0=; b=gvEa5LrKXhVKF9umOVkuDKCgHe znh1px4DUgYdLsAOL+scobCTVDzKN1qmSSIo+R2l7DKfRQG5u+bmLqa7ZzEyNQWck0zwPECNNkfuL sOP/z9O2EtmR1XAjE9XMplpc1i7p6nYxgWJglaibLBqjGiGZNQces2RjsxJ98wWBmPVj74G1Z3Mr2 FowEriqYGsLEMYTshF3suRrjS7avVMgnSi5eEjDkwbCUCis4qXz5tbQzGR6yPsDO8gwtcQxlzp0ry DV0V/O5G9mifrWd9f82E5c1937E76vMzJ9s9AIKO3T8X1vamWORqXGKCryYd/G1X67Ho53pYHFShz fff/wTiA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vy4rt-00000001M3V-210X; Thu, 05 Mar 2026 09:19:41 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vy4rr-00000001M2N-24zS for linux-arm-kernel@lists.infradead.org; Thu, 05 Mar 2026 09:19:40 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 2611B4011C; Thu, 5 Mar 2026 09:19:39 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 829E5C116C6; Thu, 5 Mar 2026 09:19:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772702379; bh=xQwOgv/G8l9dzbEEx4qGcbPy6wxWtCaAhpuA8HFWyjM=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=nWK+TsJpKJP8VXsr+TDSKgHSXBrl36P0bdvVXASBhllGksuib6AKv2ENc2BSOXMdq 2axX4nFdjkMkdykhmb6gbnp3iQAMxEEpfKW+DtoDiM0hnSI1R25vmPQasXwxXZRgKB +g56pR1aDGaTsQhONgLh+eN03S0rbF22mIO81mUOtAOu6dabd2x7IyhM/X3YbPiXWD i6r7+hhknfaMj9bBAlqWLuHEgX45hhd8RijGVmiNweB/giCeEfBUtyDt8sGUWckbWc fNVZcbvx47phN1ECZyMxWHXl4fJirwtuKdKTfV0NGXqDn3a4SL2ohNhrFMxdbL4BSW QNCxN3JYEcKSQ== Message-ID: <476695b1-0627-4b8e-9adf-96595ef74b86@kernel.org> Date: Thu, 5 Mar 2026 10:19:31 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] media: verisilicon: Fix kernel panic due to __initconst misuse To: ming.qian@oss.nxp.com, linux-media@vger.kernel.org Cc: 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, m.felsch@pengutronix.de, 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260305_011939_587637_C7457383 X-CRM114-Status: GOOD ( 19.17 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 05/03/2026 09:03, 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. > > Fixes: e0203ddf9af7 ("media: verisilicon: Avoid G2 bus error while decoding H.264 and HEVC") > Signed-off-by: Ming Qian > --- > drivers/media/platform/verisilicon/imx8m_vpu_hw.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/media/platform/verisilicon/imx8m_vpu_hw.c b/drivers/media/platform/verisilicon/imx8m_vpu_hw.c > index 6f8e43b7f157..fa429e6e8281 100644 > --- a/drivers/media/platform/verisilicon/imx8m_vpu_hw.c > +++ b/drivers/media/platform/verisilicon/imx8m_vpu_hw.c > @@ -343,7 +343,7 @@ const struct hantro_variant imx8mq_vpu_variant = { > .num_regs = ARRAY_SIZE(imx8mq_reg_names) > }; > > -static const struct of_device_id imx8mq_vpu_shared_resources[] __initconst = { > +static const struct of_device_id imx8mq_vpu_shared_resources[] __initconst_or_module = { > { .compatible = "nxp,imx8mq-vpu-g1", }, I have some doubts this was tested with section mismatch analysis. It is still referenced by non initconst data, but it should not. You have a dangling pointer. And build test would probably point it out. Best regards, Krzysztof