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 EACC02690EC; Tue, 8 Apr 2025 12:47:03 +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=1744116424; cv=none; b=Ny+ZdJauFl8qZkzACmvH6xpRcrBtaOE6d7AE88uJVsDkL1c8S6phrzFqqfaqMXbsLVNtP78oxsuYvP3EA74fqE7xmrdIKXkaImHmApm5mieD4T+PPVr8S+Tcj3bMliD3IxGShy3tP/LBZ9DoqQ4MYpJjUSVI2BVgSyf5kAvPmE4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744116424; c=relaxed/simple; bh=/LeXGP7LyZvqdzP/WT36nBlntGUEynJZTu8I5QDEW5I=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kvpc5suHX1ESALnOO7pYfXZsRCw0FSqyQLr7pJDXgFne1B2FYUEfVA6wgZdqCCnb1KQRshbwDWc+WArk7H2dDYJO5kXOXk6V1x2rc5sQGZhktF/BIci7JJsrJ8mRNKdrruOT+fkJ8Mme3+QfQdtHNmau/x0JjTU9crz0NT2ynLQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=f9o/Q5Nw; 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="f9o/Q5Nw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 73BE5C4CEE5; Tue, 8 Apr 2025 12:47:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1744116423; bh=/LeXGP7LyZvqdzP/WT36nBlntGUEynJZTu8I5QDEW5I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=f9o/Q5Nw4SCkAdIiW7F4oN02BMxAgv8N5jXAvy0b3goZLDiv/FNUQ87VperAJNN4H INuwaCYyDC9SmGe0MK7OZ/FnIzIYCqtngTh77tcIm8cyr/5xdXUrfSFuGfnS/qwXar s02z//Bsw0o/DyKC1IysNtRI1ih/qyAlszeHMhXU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Danila Chernetsov , Helge Deller , Sasha Levin Subject: [PATCH 6.12 096/423] fbdev: sm501fb: Add some geometry checks. Date: Tue, 8 Apr 2025 12:47:02 +0200 Message-ID: <20250408104847.975328745@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250408104845.675475678@linuxfoundation.org> References: <20250408104845.675475678@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Danila Chernetsov [ Upstream commit aee50bd88ea5fde1ff4cc021385598f81a65830c ] Added checks for xoffset, yoffset settings. Incorrect settings of these parameters can lead to errors in sm501fb_pan_ functions. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: 5fc404e47bdf ("[PATCH] fb: SM501 framebuffer driver") Signed-off-by: Danila Chernetsov Signed-off-by: Helge Deller Signed-off-by: Sasha Levin --- drivers/video/fbdev/sm501fb.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/video/fbdev/sm501fb.c b/drivers/video/fbdev/sm501fb.c index 86ecbb2d86db8..2eb27ebf822e8 100644 --- a/drivers/video/fbdev/sm501fb.c +++ b/drivers/video/fbdev/sm501fb.c @@ -326,6 +326,13 @@ static int sm501fb_check_var(struct fb_var_screeninfo *var, if (var->xres_virtual > 4096 || var->yres_virtual > 2048) return -EINVAL; + /* geometry sanity checks */ + if (var->xres + var->xoffset > var->xres_virtual) + return -EINVAL; + + if (var->yres + var->yoffset > var->yres_virtual) + return -EINVAL; + /* can cope with 8,16 or 32bpp */ if (var->bits_per_pixel <= 8) -- 2.39.5