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 7432A17756 for ; Wed, 9 Aug 2023 11:21:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E86ACC433C8; Wed, 9 Aug 2023 11:21:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1691580105; bh=tbmgvXGtuXRAZSFw/ZMQLE6Ym2s3C03kTOC1meUZgbA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tzwQvRHl3AhQBnD3d8Ib5pKMVuBNw9YZWHlx7l4a/0PGt+ISEsWKhah/LRlT9NXG/ ivDwZkjBBLS9CL2oRKE6+UEalndoW3q+0vXg2d71c6xQdNBf+d6OYLN9IVLDQx8uR+ XrUYWEcPAFNeleSgIra01xEZhnPvWU+s2NkAx1tY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Martin Kaiser , Helge Deller , Sasha Levin Subject: [PATCH 4.19 202/323] fbdev: imxfb: warn about invalid left/right margin Date: Wed, 9 Aug 2023 12:40:40 +0200 Message-ID: <20230809103707.387925147@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230809103658.104386911@linuxfoundation.org> References: <20230809103658.104386911@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Martin Kaiser [ Upstream commit 4e47382fbca916d7db95cbf9e2d7ca2e9d1ca3fe ] Warn about invalid var->left_margin or var->right_margin. Their values are read from the device tree. We store var->left_margin-3 and var->right_margin-1 in register fields. These fields should be >= 0. Fixes: 7e8549bcee00 ("imxfb: Fix margin settings") Signed-off-by: Martin Kaiser Signed-off-by: Helge Deller Signed-off-by: Sasha Levin --- drivers/video/fbdev/imxfb.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/video/fbdev/imxfb.c b/drivers/video/fbdev/imxfb.c index c4eb8661f7516..8ec260ed9a6f6 100644 --- a/drivers/video/fbdev/imxfb.c +++ b/drivers/video/fbdev/imxfb.c @@ -601,10 +601,10 @@ static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *inf if (var->hsync_len < 1 || var->hsync_len > 64) printk(KERN_ERR "%s: invalid hsync_len %d\n", info->fix.id, var->hsync_len); - if (var->left_margin > 255) + if (var->left_margin < 3 || var->left_margin > 255) printk(KERN_ERR "%s: invalid left_margin %d\n", info->fix.id, var->left_margin); - if (var->right_margin > 255) + if (var->right_margin < 1 || var->right_margin > 255) printk(KERN_ERR "%s: invalid right_margin %d\n", info->fix.id, var->right_margin); if (var->yres < 1 || var->yres > ymax_mask) -- 2.39.2