From patchwork Wed Mar 27 09:02:54 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kai-Heng Feng X-Patchwork-Id: 1066747 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-ide-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=canonical.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 44ThqC2yjFz9sT4 for ; Wed, 27 Mar 2019 20:03:03 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731920AbfC0JDC (ORCPT ); Wed, 27 Mar 2019 05:03:02 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:60699 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725768AbfC0JDC (ORCPT ); Wed, 27 Mar 2019 05:03:02 -0400 Received: from 61-220-137-37.hinet-ip.hinet.net ([61.220.137.37] helo=localhost) by youngberry.canonical.com with esmtpsa (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.76) (envelope-from ) id 1h94SZ-0000QZ-Na; Wed, 27 Mar 2019 09:03:00 +0000 From: Kai-Heng Feng To: axboe@kernel.dk Cc: linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org, Kai-Heng Feng , stable@vger.kernel.org Subject: [PATCH] libata: Return correct rc status in sata_pmp_eh_recover_pm() pwhen ATA_DFLAG_DETACH is set Date: Wed, 27 Mar 2019 17:02:54 +0800 Message-Id: <20190327090254.10365-1-kai.heng.feng@canonical.com> X-Mailer: git-send-email 2.17.1 Sender: linux-ide-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ide@vger.kernel.org During system resume from suspend, this can be observed on ASM1062 PMP controller: <6>[12007.593358] ata10.01: SATA link down (SStatus 0 SControl 330) <6>[12007.593469] ata10.02: hard resetting link <6>[12007.908353] ata10.02: SATA link down (SStatus 0 SControl 330) <6>[12007.911149] ata10.00: configured for UDMA/133 <0>[12007.972508] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: sata_pmp_eh_recover+0xa2b/0xa40 <0>[12007.972508] <4>[12007.972515] CPU: 2 PID: 230 Comm: scsi_eh_9 Tainted: P OE 4.15.0-46-generic #49-Ubuntu <4>[12007.972517] Hardware name: System manufacturer System Product Name/A320M-C, BIOS 1001 12/10/2017 <4>[12007.972518] Call Trace: <4>[12007.972525] dump_stack+0x63/0x8b <4>[12007.972530] panic+0xe4/0x244 <4>[12007.972533] ? sata_pmp_eh_recover+0xa2b/0xa40 <4>[12007.972536] __stack_chk_fail+0x19/0x20 <4>[12007.972538] sata_pmp_eh_recover+0xa2b/0xa40 <4>[12007.972543] ? ahci_do_softreset+0x260/0x260 [libahci] <4>[12007.972545] ? ahci_do_hardreset+0x140/0x140 [libahci] <4>[12007.972547] ? ata_phys_link_offline+0x60/0x60 <4>[12007.972549] ? ahci_stop_engine+0xc0/0xc0 [libahci] <4>[12007.972552] sata_pmp_error_handler+0x22/0x30 <4>[12007.972554] ahci_error_handler+0x45/0x80 [libahci] <4>[12007.972556] ata_scsi_port_error_handler+0x29b/0x770 <4>[12007.972558] ? ata_scsi_cmd_error_handler+0x101/0x140 <4>[12007.972559] ata_scsi_error+0x95/0xd0 <4>[12007.972562] ? scsi_try_target_reset+0x90/0x90 <4>[12007.972563] scsi_error_handler+0xd0/0x5b0 <4>[12007.972566] kthread+0x121/0x140 <4>[12007.972567] ? scsi_eh_get_sense+0x200/0x200 <4>[12007.972569] ? kthread_create_worker_on_cpu+0x70/0x70 <4>[12007.972572] ret_from_fork+0x22/0x40 <0>[12007.972591] Kernel Offset: 0xcc00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) Since sata_pmp_eh_recover_pmp() doens't set rc when ATA_DFLAG_DETACH is set, sata_pmp_eh_recover() continues to run. During retry it triggers the stack protector. Set correct rc in sata_pmp_eh_recover_pmp() to let sata_pmp_eh_recover() jump to pmp_fail directly. BugLink: https://bugs.launchpad.net/bugs/1821434 Cc: stable@vger.kernel.org Signed-off-by: Kai-Heng Feng --- drivers/ata/libata-pmp.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/ata/libata-pmp.c b/drivers/ata/libata-pmp.c index 2ae1799f4992..51eeaea65833 100644 --- a/drivers/ata/libata-pmp.c +++ b/drivers/ata/libata-pmp.c @@ -764,6 +764,7 @@ static int sata_pmp_eh_recover_pmp(struct ata_port *ap, if (dev->flags & ATA_DFLAG_DETACH) { detach = 1; + rc = -ENODEV; goto fail; }