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 914963E274D for ; Fri, 8 May 2026 13:14:03 +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=1778246043; cv=none; b=A4Nm7SPCccTFx836yef36mMnXvIzD4Sraf8QG/4/PA+mQlScg+mSDtNMyimN9S/+T37Pua6W6b3cmZhr5aSjeU3RhAkFCYDnZYJYpbf+8Vy2cRcekI8CZqJ3PwQgNAgRhevqBSTeFYd6em1DS76Pbm3Bi/z2BOioNx+SYQHmZOM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778246043; c=relaxed/simple; bh=hrzmIUa0+DFywvyqFHXm3Vei3S8aYqgFFQURLZmA4SY=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=LLmxDFlnIwH6Km8eqwuqEEmXBa8YgwrlWMesoTeNM4dYzhJvnBsWTBBz6DUEtxdE4FQQ35dD7178BIA0UtnHZjVGR+tcM7M2WZ3RVmuMnJekp9JTN9u1yEJL201UhqrhOIZkLqVwvESCs1UB9/EWeEa05YNQJ7aWD8fbl1pga+U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=mi0JhQjp; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="mi0JhQjp" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E95C9C2BCB0; Fri, 8 May 2026 13:14:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778246043; bh=hrzmIUa0+DFywvyqFHXm3Vei3S8aYqgFFQURLZmA4SY=; h=From:To:Cc:Subject:Date:Reply-To:From; b=mi0JhQjp4RNz9mbwaVRI0KdfGF+WFG4DHlbdN2QYwdsvdEjT6UDFJZt2XOaZXALUv Zs/ws0rww3N+QvSMGnYdGpeBR2+jgprHOYEKM+2nZUBKkvA3hdr1lsb3Cb81h4cFxX u7mhmyeVb0WaBX8Akpu6Bpr3HpHEoYL2yaAl3X4E= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-43294: drm: renesas: rz-du: mipi_dsi: fix kernel panic when rebooting for some panels Date: Fri, 8 May 2026 15:11:59 +0200 Message-ID: <2026050854-CVE-2026-43294-8714@gregkh> X-Mailer: git-send-email 2.54.0 Reply-To: , Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2946; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=Os6zVWx1lCmgfkbW4t3e+N+Nrm9y4+n0ramAl0uj0/g=; b=owGbwMvMwCRo6H6F97bub03G02pJDJl/H0pttYizDpH+bh7Qt4t7dqbKBo9G+6WFggGqHfer+ b95Nz7oiGVhEGRikBVTZPmyjefo/opDil6Gtqdh5rAygQxh4OIUgIlI/GJY0BH5xeVHO6d9EGvc o9W/L3wVa8g+xrBgxbEbxdxTbx2ojP0uetNr8sfPt2tOAQA= X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: 8bit From: Greg Kroah-Hartman Description =========== In the Linux kernel, the following vulnerability has been resolved: drm: renesas: rz-du: mipi_dsi: fix kernel panic when rebooting for some panels Since commit 56de5e305d4b ("clk: renesas: r9a07g044: Add MSTOP for RZ/G2L") we may get the following kernel panic, for some panels, when rebooting: systemd-shutdown[1]: Rebooting. Call trace: ... do_serror+0x28/0x68 el1h_64_error_handler+0x34/0x50 el1h_64_error+0x6c/0x70 rzg2l_mipi_dsi_host_transfer+0x114/0x458 (P) mipi_dsi_device_transfer+0x44/0x58 mipi_dsi_dcs_set_display_off_multi+0x9c/0xc4 ili9881c_unprepare+0x38/0x88 drm_panel_unprepare+0xbc/0x108 This happens for panels that need to send MIPI-DSI commands in their unprepare() callback. Since the MIPI-DSI interface is stopped at that point, rzg2l_mipi_dsi_host_transfer() triggers the kernel panic. Fix by moving rzg2l_mipi_dsi_stop() to new callback function rzg2l_mipi_dsi_atomic_post_disable(). With this change we now have the correct power-down/stop sequence: systemd-shutdown[1]: Rebooting. rzg2l-mipi-dsi 10850000.dsi: rzg2l_mipi_dsi_atomic_disable(): entry ili9881c-dsi 10850000.dsi.0: ili9881c_unprepare(): entry rzg2l-mipi-dsi 10850000.dsi: rzg2l_mipi_dsi_atomic_post_disable(): entry reboot: Restarting system The Linux kernel CVE team has assigned CVE-2026-43294 to this issue. Affected and fixed versions =========================== Fixed in 6.18.16 with commit 79f42487ed60d0d5ffce97c3bb98f80c3d17735a Fixed in 6.19.6 with commit 41cda667ffc5074c56279c632b0c20024da6ecdd Fixed in 7.0 with commit 64aa8b3a60a825134f7d866adf05c024bbe0c24c Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2026-43294 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/79f42487ed60d0d5ffce97c3bb98f80c3d17735a https://git.kernel.org/stable/c/41cda667ffc5074c56279c632b0c20024da6ecdd https://git.kernel.org/stable/c/64aa8b3a60a825134f7d866adf05c024bbe0c24c