From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793212450; b=cEAP/5hzG2juwWl+kUYD7mBvqKPpVhYPTAU5vbEAd7QxweTOslXdLoPgbrdWB+/HTuDe T+TG3VXCfmxZmsfsSaWCFNgELu8JfcKb91LRgd+kldeye89m2o/0DCbw0S06dHb68J79U VzWiNFl1PWOjzCfebMjxwLkyg2c6zzQ3QH3Y0aKmf0xkCj9PU7+QNansRH9gtjtMG0YKQ St12jvvnfe8aiGo+PpqgJhL3gyraANe9D6o+8SUH52rXYGHN/r6mTjQhSnlq99p/jlRuT zr8bbx5on3juS8PP7T2sl6PVFf+EehoDTXLe0QtKslZ0bz/t6ZTd9GEB5KAkjurlSVQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793212450; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=emCJPX04NX4ewAnlx8q+OK5pF+dxqZcw3lVsjTlB43s=; b=ZeYPx/GcpX6En3m1TFPKWO5eZFOFQNdu8TRRLrm8qqPk8kAYZRie6XNGNEFV9T4eqbTM PHQYXjpNp25t6uky9GY5qzc/aj4TAee0CW4LzV0fqD//7I9k/+HKZVf8SEF7MB8LEgzCA RjkbD2BRmN3JE3zTVD17dXuZpVv9OqaYttdyv9bZeoPTxvaj2LO5kwfh8ZAWdyizZ8aI2 LVHGGWdIFNgKWxuTXhPZqlkZNXXdtWLBc/dFaJ4HGl0ZVepFa9siwBkN5d/HZsFZocGRJ pJELJW81431dfi46T3IMnm29daKEZ/lgYPh/5vyr6U/EFegLE44t0ejLZDjYSiuAESw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=uPpMj+qg; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 37A28606A320; Wed, 28 Oct 2026 18:34:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=uPpMj+qg Received: by smtp.kernel.org (Postfix) with ESMTPSA id 86DB91F01828; Wed, 28 Oct 2026 18:34:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793212450; bh=emCJPX04NX4ewAnlx8q+OK5pF+dxqZcw3lVsjTlB43s=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=uPpMj+qgk3LYpWsSOwCPM3tSXz7KjfAvNVDqLG2CIXaVPdH68BU6sfEdlVbm1WWrR vyo3NwfA1quhOFEXylHtSDrRxn3Pv8TttmFP8w4CKYh6fPV1CvruZsej+Cx5N5NNDr +ysSj7QEMyOjm53l9G/8eeoEk/idCXX1x+a3qnHs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Thomas Zimmermann , Thierry Reding , Maxime Ripard , Javier Martinez Canillas , Sasha Levin Subject: [PATCH 6.1 0115/1887] drm/sysfb: simpledrm: Improve stride validation Date: Wed, 28 Oct 2026 17:36:51 +0100 Message-ID: <20261028170501.852639030@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261028170459.200466217@linuxfoundation.org> References: <20261028170459.200466217@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Thomas Zimmermann [ Upstream commit df6533f11688aa30be3bb883c7637f4ffdbb7cbd ] Validate the computed stride against the maximum value INT_MAX. Signed-off-by: Thomas Zimmermann Reviewed-by: Thierry Reding Reviewed-by: Maxime Ripard Reviewed-by: Javier Martinez Canillas Fixes: 7bfa5c7b28d6 ("drm/simpledrm: Compute linestride with drm_format_info_min_pitch()") Cc: # v6.1+ Link: https://patch.msgid.link/20260625094509.157581-5-tzimmermann@suse.de Signed-off-by: Sasha Levin --- drivers/gpu/drm/tiny/simpledrm.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c index 18489779fb8aa..4b5ccbb13ecfe 100644 --- a/drivers/gpu/drm/tiny/simpledrm.c +++ b/drivers/gpu/drm/tiny/simpledrm.c @@ -693,9 +693,15 @@ static struct simpledrm_device *simpledrm_device_create(struct drm_driver *drv, return ERR_PTR(-ENODEV); } if (!stride) { - stride = drm_format_info_min_pitch(format, 0, width); - if (drm_WARN_ON(dev, !stride)) + u64 pitch = drm_format_info_min_pitch(format, 0, width); + + if (drm_WARN_ON(dev, !pitch)) { + return ERR_PTR(-EINVAL); /* driver bug */ + } else if (pitch > INT_MAX) { + drm_warn(dev, "stride of %llu exceeds maximum\n", pitch); return ERR_PTR(-EINVAL); + } + stride = pitch; } sdev->mode = simpledrm_mode(width, height); -- 2.53.0