Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932389Ab2JNOoF (ORCPT ); Sun, 14 Oct 2012 10:44:05 -0400 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:46710 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932301Ab2JNOoB (ORCPT ); Sun, 14 Oct 2012 10:44:01 -0400 Message-Id: <20121014143540.362379404@decadent.org.uk> User-Agent: quilt/0.60-1 Date: Sun, 14 Oct 2012 15:36:21 +0100 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Julia Lawall , Steffen Maier , Martin Peschke , James Bottomley Subject: [ 048/147] [SCSI] zfcp: remove invalid reference to list iterator variable In-Reply-To: <20121014143533.742627615@decadent.org.uk> X-SA-Exim-Connect-IP: 77.75.106.1 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1953 Lines: 50 3.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Julia Lawall commit ca579c9f136af4274ccfd1bcaee7f38a29a0e2e9 upstream. If list_for_each_entry, etc complete a traversal of the list, the iterator variable ends up pointing to an address at an offset from the list head, and not a meaningful structure. Thus this value should not be used after the end of the iterator. Replace port->adapter->scsi_host by adapter->scsi_host. This problem was found using Coccinelle (http://coccinelle.lip6.fr/). Oversight in upsteam commit of v2.6.37 a1ca48319a9aa1c5b57ce142f538e76050bb8972 "[SCSI] zfcp: Move ACL/CFDC code to zfcp_cfdc.c" which merged the content of zfcp_erp_port_access_changed(). Signed-off-by: Julia Lawall Signed-off-by: Steffen Maier Reviewed-by: Martin Peschke Signed-off-by: James Bottomley Signed-off-by: Ben Hutchings --- drivers/s390/scsi/zfcp_cfdc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/s390/scsi/zfcp_cfdc.c b/drivers/s390/scsi/zfcp_cfdc.c index fbd8b4d..49b82e4 100644 --- a/drivers/s390/scsi/zfcp_cfdc.c +++ b/drivers/s390/scsi/zfcp_cfdc.c @@ -293,7 +293,7 @@ void zfcp_cfdc_adapter_access_changed(struct zfcp_adapter *adapter) } read_unlock_irqrestore(&adapter->port_list_lock, flags); - shost_for_each_device(sdev, port->adapter->scsi_host) { + shost_for_each_device(sdev, adapter->scsi_host) { zfcp_sdev = sdev_to_zfcp(sdev); status = atomic_read(&zfcp_sdev->status); if ((status & ZFCP_STATUS_COMMON_ACCESS_DENIED) || -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/