From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 E64E3471251; Tue, 21 Jul 2026 20:51:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784667103; cv=none; b=LMiTv3xnI9MLYd71OgmAvGYhQLrj6RR+5hmVMMmdGUgE25F/fMMWKJLqKUXTQhsSvX6Jo9KsVmpW7E43hO//xNbqV6nsMoM03PpItN0PtxGoZgG+WF63aD3Ip+GBNLNipQq7FAaz8NCMaqtNwiYOdvicn8lwOuPbfTyuYP2Aczw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784667103; c=relaxed/simple; bh=fv3C332M17ywPbAPs6PYCd8DQujJId3P3aMR09KTbAU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Gw3CamX7DQDpTsPn2clqmIXTDeEsygfHu6HxXRFvCMZ+4hoVBL/rvQ5UoLy3Nokz+hPWC+89XBmkfO2fa5RgI2PEa1BBixCadMx4lZ4tvUsHXCp3apz9fXRPBEhiksyiSdPKGEPrIyMtFyDLtimzgPsCddyG+qeTFusjQfLhgDM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=J0ORcZnI; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="J0ORcZnI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 579FC1F000E9; Tue, 21 Jul 2026 20:51:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784667101; bh=lV6gAcBKr76ZDpC4PmAYhcZv89FxwnQD3nepHp0DAqY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=J0ORcZnIqlDhG7g8lxQs5mE+B0eyfVR8VfwuldsqQ/Z8yRUiWEIHQ1gN289fiZTez cTgUBr+UEAZd/+07kGVdLD5iUfH7siAK2I1iVieRbyJYHJO4xNFaidc8KQPHc1mLcK w13X0YmzdNwX3nk3rpOezuoHCI6G2oQffvVQZ61Q= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Wang Jun <1742789905@qq.com>, "Christophe Leroy (CS GROUP)" Subject: [PATCH 6.6 0935/1266] soc: fsl: qe: panic on ioremap() failure in qe_reset() Date: Tue, 21 Jul 2026 17:22:52 +0200 Message-ID: <20260721152502.758013840@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152441.786066624@linuxfoundation.org> References: <20260721152441.786066624@linuxfoundation.org> User-Agent: quilt/0.69 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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Wang Jun <1742789905@qq.com> commit a0fe29d20e7822182e12324905af5115c1b3aed3 upstream. When ioremap() fails in qe_reset(), the global pointer qe_immr remains NULL, leading to a subsequent NULL pointer dereference when the pointer is accessed. Since this happens early in the boot process, a failure to map a few bytes of I/O memory indicates a fatal error from which the system cannot recover. Follow the same pattern as qe_sdma_init() and panic immediately when ioremap() fails. This avoids a silent NULL pointer dereference later and makes the error explicit. Fixes: 986585385131 ("[POWERPC] Add QUICC Engine (QE) infrastructure") Cc: stable@vger.kernel.org Signed-off-by: Wang Jun <1742789905@qq.com> Link: https://lore.kernel.org/r/tencent_FED49CF5331CC0C7910618883332A08E2606@qq.com [chleroy: Rearranged change to reduce churn] Signed-off-by: Christophe Leroy (CS GROUP) Signed-off-by: Greg Kroah-Hartman --- drivers/soc/fsl/qe/qe.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/soc/fsl/qe/qe.c +++ b/drivers/soc/fsl/qe/qe.c @@ -89,6 +89,9 @@ void qe_reset(void) if (qe_immr == NULL) qe_immr = ioremap(get_qe_base(), QE_IMMAP_SIZE); + if (!qe_immr) + panic("QE:ioremap failed!"); + qe_snums_init(); qe_issue_cmd(QE_RESET, QE_CR_SUBBLOCK_INVALID,