From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 7C6C33E7BD0; Fri, 26 Jun 2026 12:48:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782478097; cv=none; b=L7KKSZqq680cWRVX369lSPVIjS107EgkS4DWrSqtFilHv7NvIVtdjkjtpt3qLE1M7pkNat/sXQGfYjQXk29cON754+ScofjIJc+ZJP54hPwJlRuvf0zUkNPiAOdoQouGejEh1tcYjNmTaajyd/J9Iv6y4ZgWk/BfueVYK6tDRk0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782478097; c=relaxed/simple; bh=bGwu9Z6aMghf29dyK10iLr2V0bNIiUqqeMLm7oscLkg=; h=Message-ID:Date:From:To:Subject:In-Reply-To:References:Cc; b=A/jwRP1DFnNtp8TrIKzBQVlgazPOoknZKryyYuC1T1dmflphlA6XKObNIMcprvAH1btHvPik2l04PUyzTk5Li6qOk46ow4mVPNHspnBZB/HQfh1A70fdaNzOoLwjZMSnycNbvGbF6YBGMTsaIH5eqfQ3PrnRqPO9gkuGtEo3cCM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=c1nHVby4; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="c1nHVby4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E7ABE1F000E9; Fri, 26 Jun 2026 12:48:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782478092; bh=v4y2stLxJY7uDBiTbKNkCgVELhkFZRy7m3W4tRJdf+E=; h=Date:From:To:Subject:In-Reply-To:References:Cc; b=c1nHVby4VzRMzYi1WtQ/1/FW3ad4AR7RuNig6IMp0LM3ATUWQciaqWn60HmhO2Mvx cNEqkAHm18Hvnr+k13yWAhq+yWo1uNw3hHWs3Q8x1TMAn1T5q4A954G06yoTZ/xqv7 lRQaMyVCNzPQM45PccrZMMHmAIAiMKXOnHAYfj6tLYr6w+/gjiQcRXuiPq4vQPbvJZ cLkFy6mqvFRYiquJKKOAOxqBTRMC3VrfNBzcr08WK3a7LEXgOXrYKDLUf/GU7q1FJs LJqnxBYj30rKVQA7A4J67kU/ZHMfl/2PT7/+94GYQY7CBjUcCvqoe/B9jXAyzpvIl0 O2OBomnk1cP5w== Message-ID: Date: Fri, 26 Jun 2026 12:48:10 +0000 From: "Maxime Ripard" To: "Albert Esteve" Subject: Re: [PATCH 2/5] drm/bridge/panel: hold a reference to the wrapped panel In-Reply-To: <20260626-drm_refcount_wiring-v1-2-cca1a7b3bdef@redhat.com> References: <20260626-drm_refcount_wiring-v1-2-cca1a7b3bdef@redhat.com> Cc: dri-devel@lists.freedesktop.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-sunxi@lists.linux.dev, linux-tegra@vger.kernel.org, "Alain Volmat" , "Alexandre Torgue" , "Alim Akhtar" , "Alison Wang" , "Andrzej Hajda" , "Andy Yan" , "Biju Das" , "Chen-Yu Tsai" , "David Airlie" , "Fabio Estevam" , "Frank Li" , "Geert Uytterhoeven" , =?utf-8?b?SGVpa28gU3TDvGJuZXI=?= , "Inki Dae" , "Jagan Teki" , "Jernej Skrabec" , "Jessica Zhang" , "Jingoo Han" , "Jonas Karlman" , "Jonathan Hunter" , "Jyri Sarha" , "Kieran Bingham" , "Krzysztof Kozlowski" , "Kyungmin Park" , "Laurent Pinchart" , "Laurent Pinchart" , "Laurentiu Palcu" , "Linus Walleij" , "Luca Ceresoli" , "Lucas Stach" , "Maarten Lankhorst" , "Magnus Damm" , "Marek Szyprowski" , "Marek Vasut" , "Maxime Coquelin" , "Maxime Ripard" , "Mikko Perttunen" , "Neil Armstrong" , "Paul Cercueil" , "Paul Kocialkowski" , "Pengutronix Kernel Team" , "Peter Griffin" , "Philippe Cornu" , "Raphael Gallais-Pou" , "Raphael Gallais-Pou" , "Robert Foss" , "Samuel Holland" , "Sandy Huang" , "Sascha Hauer" , "Seung-Woo Kim" , "Simona Vetter" , "Stefan Agner" , "Thierry Reding" , "Thomas Zimmermann" , "Tomi Valkeinen" , "Yannick Fertre" Content-Transfer-Encoding: 7bit Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: On Fri, 26 Jun 2026 14:03:24 +0200, Albert Esteve wrote: > drm_panel_bridge_add_typed() stores a pointer to the drm_panel it > wraps, but never acquires a reference to it. If the panel device > goes away while a panel_bridge still exists, the dangling pointer can > be dereferenced through panel_bridge->panel. > > > [ ... ] Reviewed-by: Maxime Ripard Thanks! Maxime 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 2159DCDE002 for ; Fri, 26 Jun 2026 12:48:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:References:In-Reply-To: Subject:To:From: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=KxFady6Jsx8oLVTVYw00dbHpCFk0+nvcziemTISwk88=; b=G/IFOcm6W9B6G/ YDrQcGk2dZawrJXwyWADfJdYXbV9aAabUIpI3pzhHGdyP2nYg1uyUJriIqVR1uqX+hYDke7OHE0LG Skz9tNLN5mfQsxcXAGUXQxu4Tqon8/eIXdF5c/ie8fa4ORzNcW88GvHG+ekRbA6J+UyNVj/uG21vB pC0vK0+qNtuGz+7ECjUk8RuBmsZoogIgtGOa9yuR6iSBD6WxKCEo9Im25yZDWiM3EtgedC9NYBkKI 9s9QGIKPQ7YJE9voTe+ki/Buvjzg2kOI/2FQcHIh7YrB/l2dtx+5L/k5empD27bPSEWFlnYgYN+rN 7JdnVelCIlyodPru776A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wd5yh-0000000BKaf-38sH; Fri, 26 Jun 2026 12:48:15 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wd5yf-0000000BKaW-18TW; Fri, 26 Jun 2026 12:48:13 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id AA6C443FCD; Fri, 26 Jun 2026 12:48:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E7ABE1F000E9; Fri, 26 Jun 2026 12:48:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782478092; bh=v4y2stLxJY7uDBiTbKNkCgVELhkFZRy7m3W4tRJdf+E=; h=Date:From:To:Subject:In-Reply-To:References:Cc; b=c1nHVby4VzRMzYi1WtQ/1/FW3ad4AR7RuNig6IMp0LM3ATUWQciaqWn60HmhO2Mvx cNEqkAHm18Hvnr+k13yWAhq+yWo1uNw3hHWs3Q8x1TMAn1T5q4A954G06yoTZ/xqv7 lRQaMyVCNzPQM45PccrZMMHmAIAiMKXOnHAYfj6tLYr6w+/gjiQcRXuiPq4vQPbvJZ cLkFy6mqvFRYiquJKKOAOxqBTRMC3VrfNBzcr08WK3a7LEXgOXrYKDLUf/GU7q1FJs LJqnxBYj30rKVQA7A4J67kU/ZHMfl/2PT7/+94GYQY7CBjUcCvqoe/B9jXAyzpvIl0 O2OBomnk1cP5w== Message-ID: Date: Fri, 26 Jun 2026 12:48:10 +0000 From: "Maxime Ripard" To: "Albert Esteve" Subject: Re: [PATCH 2/5] drm/bridge/panel: hold a reference to the wrapped panel In-Reply-To: <20260626-drm_refcount_wiring-v1-2-cca1a7b3bdef@redhat.com> References: <20260626-drm_refcount_wiring-v1-2-cca1a7b3bdef@redhat.com> Cc: dri-devel@lists.freedesktop.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-sunxi@lists.linux.dev, linux-tegra@vger.kernel.org, "Alain Volmat" , "Alexandre Torgue" , "Alim Akhtar" , "Alison Wang" , "Andrzej Hajda" , "Andy Yan" , "Biju Das" , "Chen-Yu Tsai" , "David Airlie" , "Fabio Estevam" , "Frank Li" , "Geert Uytterhoeven" , =?utf-8?b?SGVpa28gU3TDvGJuZXI=?= , "Inki Dae" , "Jagan Teki" , "Jernej Skrabec" , "Jessica Zhang" , "Jingoo Han" , "Jonas Karlman" , "Jonathan Hunter" , "Jyri Sarha" , "Kieran Bingham" , "Krzysztof Kozlowski" , "Kyungmin Park" , "Laurent Pinchart" , "Laurent Pinchart" , "Laurentiu Palcu" , "Linus Walleij" , "Luca Ceresoli" , "Lucas Stach" , "Maarten Lankhorst" , "Magnus Damm" , "Marek Szyprowski" , "Marek Vasut" , "Maxime Coquelin" , "Maxime Ripard" , "Mikko Perttunen" , "Neil Armstrong" , "Paul Cercueil" , "Paul Kocialkowski" , "Pengutronix Kernel Team" , "Peter Griffin" , "Philippe Cornu" , "Raphael Gallais-Pou" , "Raphael Gallais-Pou" , "Robert Foss" , "Samuel Holland" , "Sandy Huang" , "Sascha Hauer" , "Seung-Woo Kim" , "Simona Vetter" , "Stefan Agner" , "Thierry Reding" , "Thomas Zimmermann" , "Tomi Valkeinen" , "Yannick Fertre" X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org On Fri, 26 Jun 2026 14:03:24 +0200, Albert Esteve wrote: > drm_panel_bridge_add_typed() stores a pointer to the drm_panel it > wraps, but never acquires a reference to it. If the panel device > goes away while a panel_bridge still exists, the dangling pointer can > be dereferenced through panel_bridge->panel. > > > [ ... ] Reviewed-by: Maxime Ripard Thanks! Maxime _______________________________________________ Linux-rockchip mailing list Linux-rockchip@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-rockchip