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 9BCA17DA9E; Thu, 15 Aug 2024 13:48:30 +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=1723729710; cv=none; b=RV74OkLIrIg5zfoTVIBhk6dOWCY7iFDd0BEcAlSfEbrEmDhCx+V5KvkPRVhLwS2Xikr4l2gM+zXHj48JclmAXGW/udIk8dNzjYj6/stydNbg+wa5CmrsykDnk0SF5fMpRdmj/8CRLzz1AM5F9MXWrMmJ08HP8UaSU2V4FCnQMAU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723729710; c=relaxed/simple; bh=joaQF8ROzCVcLG2YmaRAGLFGlLO3+5rStLnhs08uiyY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qts6NkHP/l9XclDlN+yzwbJAtNtj+XlKeXMtWJKBUMUYrIKOQ6fa+oMw+NzcgIVIg94vSpqoYycob6cMU+Q01r1QIT62nXI7DkKc9chHHgl8itRxg8LyUD7Rc//Yvy0V0t6/aHFj3KQoLMK8TVKSTczI6fOLqm/lVKhuA88PF2k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ABTxnlFz; 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="ABTxnlFz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1F060C32786; Thu, 15 Aug 2024 13:48:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1723729710; bh=joaQF8ROzCVcLG2YmaRAGLFGlLO3+5rStLnhs08uiyY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ABTxnlFzy0545cYqSwfBffAq2NeC4+MpODkoW/tALhZrj1aECXjMSsxHmCX9h+V2F pFtSdMS7xWxfuWgt1mX2t+9SSf+UdFmYUbUZpvcYgMVngsPE6iLdpEX1Bs81E04+iU 9spPeDmn85YkbjoahGnuYCFaf0CE7lPLNFcdMVzk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ma Ke , Patrik Jakobsson Subject: [PATCH 5.15 183/484] drm/gma500: fix null pointer dereference in psb_intel_lvds_get_modes Date: Thu, 15 Aug 2024 15:20:41 +0200 Message-ID: <20240815131948.484248399@linuxfoundation.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240815131941.255804951@linuxfoundation.org> References: <20240815131941.255804951@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ma Ke commit 2df7aac81070987b0f052985856aa325a38debf6 upstream. In psb_intel_lvds_get_modes(), the return value of drm_mode_duplicate() is assigned to mode, which will lead to a possible NULL pointer dereference on failure of drm_mode_duplicate(). Add a check to avoid npd. Cc: stable@vger.kernel.org Fixes: 89c78134cc54 ("gma500: Add Poulsbo support") Signed-off-by: Ma Ke Signed-off-by: Patrik Jakobsson Link: https://patchwork.freedesktop.org/patch/msgid/20240709092011.3204970-1-make24@iscas.ac.cn Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/gma500/psb_intel_lvds.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/gpu/drm/gma500/psb_intel_lvds.c +++ b/drivers/gpu/drm/gma500/psb_intel_lvds.c @@ -508,6 +508,9 @@ static int psb_intel_lvds_get_modes(stru if (mode_dev->panel_fixed_mode != NULL) { struct drm_display_mode *mode = drm_mode_duplicate(dev, mode_dev->panel_fixed_mode); + if (!mode) + return 0; + drm_mode_probed_add(connector, mode); return 1; }