From: Dan Carpenter <dan.carpenter@oracle.com>
To: "James E.J. Bottomley" <jejb@linux.ibm.com>,
Dan Williams <dan.j.williams@intel.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>,
Alan Stern <stern@rowland.harvard.edu>,
Jacek Danecki <jacek.danecki@intel.com>,
James Bottomley <JBottomley@parallels.com>,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
kernel-janitors@vger.kernel.org
Subject: [PATCH] scsi: libsas: use _safe() loop in sas_resume_port()
Date: Wed, 19 May 2021 17:20:27 +0300 [thread overview]
Message-ID: <YKUeq6gwfGcvvhty@mwanda> (raw)
In-Reply-To: <20210518082855.GB32682@kadam>
If sas_notify_lldd_dev_found() fails then this code calls:
sas_unregister_dev(port, dev);
which removes "dev", our list iterator, from the list. This could
lead to an endless loop. We need to use list_for_each_entry_safe().
Fixes: 303694eeee5e ("[SCSI] libsas: suspend / resume support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
drivers/scsi/libsas/sas_port.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/libsas/sas_port.c b/drivers/scsi/libsas/sas_port.c
index 19cf418928fa..e3d03d744713 100644
--- a/drivers/scsi/libsas/sas_port.c
+++ b/drivers/scsi/libsas/sas_port.c
@@ -25,7 +25,7 @@ static bool phy_is_wideport_member(struct asd_sas_port *port, struct asd_sas_phy
static void sas_resume_port(struct asd_sas_phy *phy)
{
- struct domain_device *dev;
+ struct domain_device *dev, *n;
struct asd_sas_port *port = phy->port;
struct sas_ha_struct *sas_ha = phy->ha;
struct sas_internal *si = to_sas_internal(sas_ha->core.shost->transportt);
@@ -44,7 +44,7 @@ static void sas_resume_port(struct asd_sas_phy *phy)
* 1/ presume every device came back
* 2/ force the next revalidation to check all expander phys
*/
- list_for_each_entry(dev, &port->dev_list, dev_list_node) {
+ list_for_each_entry_safe(dev, n, &port->dev_list, dev_list_node) {
int i, rc;
rc = sas_notify_lldd_dev_found(dev);
--
2.30.2
next prev parent reply other threads:[~2021-05-19 14:20 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-16 16:06 [PATCH 1/6] staging: rtl8188eu: use safe iterator in rtw_free_network_queue Martin Kaiser
2021-05-16 16:06 ` [PATCH 2/6] staging: rtl8188eu: use safe iterator in rtw_free_all_stainfo Martin Kaiser
2021-05-16 19:24 ` Guenter Roeck
2021-05-16 16:06 ` [PATCH 3/6] staging: rtl8188eu: use safe iterator in expire_timeout_chk Martin Kaiser
2021-05-16 19:24 ` Guenter Roeck
2021-05-16 16:06 ` [PATCH 4/6] staging: rtl8188eu: use safe iterator in rtw_acl_remove_sta Martin Kaiser
2021-05-16 19:24 ` Guenter Roeck
2021-05-16 16:06 ` [PATCH 5/6] staging: rtl8188eu: use safe iterator in rtw_sta_flush Martin Kaiser
2021-05-16 19:24 ` Guenter Roeck
2021-05-16 16:06 ` [PATCH 6/6] staging: rtl8188eu: use safe iterator in rtw_free_xmitframe_queue Martin Kaiser
2021-05-16 19:24 ` Guenter Roeck
2021-05-16 19:24 ` [PATCH 1/6] staging: rtl8188eu: use safe iterator in rtw_free_network_queue Guenter Roeck
2021-05-16 20:03 ` Christophe JAILLET
2021-05-17 20:21 ` Martin Kaiser
2021-05-17 15:57 ` Dan Carpenter
2021-05-18 8:28 ` Dan Carpenter
2021-05-19 14:16 ` Dan Carpenter
2021-05-19 14:16 ` [PATCH] staging: emxx_udc: fix loop in _nbu2ss_nuke() Dan Carpenter
2021-05-19 14:17 ` [PATCH] w1: fix loop in w1_fini() Dan Carpenter
2023-05-08 8:59 ` (subset) " Krzysztof Kozlowski
2021-05-19 14:18 ` [bug report] {net, IB}/mlx5: Manage port association for multiport RoCE Dan Carpenter
2021-05-20 8:09 ` Leon Romanovsky
2021-05-19 14:19 ` [bug report] Bluetooth: L2CAP: Add initial code for Enhanced Credit Based Mode Dan Carpenter
2021-05-19 14:20 ` Dan Carpenter [this message]
2021-05-19 14:48 ` [PATCH] scsi: libsas: use _safe() loop in sas_resume_port() John Garry
2021-05-22 4:40 ` Martin K. Petersen
2021-05-17 20:18 ` [PATCH v2 1/6] staging: rtl8188eu: use safe iterator in rtw_free_network_queue Martin Kaiser
2021-05-17 20:18 ` [PATCH v2 2/6] staging: rtl8188eu: use safe iterator in rtw_free_all_stainfo Martin Kaiser
2021-05-17 20:32 ` Guenter Roeck
2021-05-17 20:18 ` [PATCH v2 3/6] staging: rtl8188eu: use safe iterator in expire_timeout_chk Martin Kaiser
2021-05-17 20:33 ` Guenter Roeck
2021-05-17 20:18 ` [PATCH v2 4/6] staging: rtl8188eu: use safe iterator in rtw_acl_remove_sta Martin Kaiser
2021-05-17 20:34 ` Guenter Roeck
2021-05-17 20:18 ` [PATCH v2 5/6] staging: rtl8188eu: use safe iterator in rtw_sta_flush Martin Kaiser
2021-05-17 20:34 ` Guenter Roeck
2021-05-17 20:18 ` [PATCH v2 6/6] staging: rtl8188eu: use safe iterator in rtw_free_xmitframe_queue Martin Kaiser
2021-05-17 20:35 ` Guenter Roeck
2021-05-17 20:30 ` [PATCH v2 1/6] staging: rtl8188eu: use safe iterator in rtw_free_network_queue Guenter Roeck
2021-05-18 7:44 ` Dan Carpenter
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