summaryrefslogtreecommitdiffstats
path: root/drivers/s390/scsi
diff options
context:
space:
mode:
authorSwen Schillig <swen@vnet.ibm.com>2010-11-17 14:23:43 +0100
committerJames Bottomley <James.Bottomley@suse.de>2010-12-09 09:41:21 -0600
commit14718e3cd8e9c6937114cebbf3ce5d504328da8c (patch)
treed9ee10fc825730ce360f50caf53377ebe2872655 /drivers/s390/scsi
parentd3e1088d68735eb7da12f79a0c3c0d951cbc89f1 (diff)
downloadop-kernel-dev-14718e3cd8e9c6937114cebbf3ce5d504328da8c.zip
op-kernel-dev-14718e3cd8e9c6937114cebbf3ce5d504328da8c.tar.gz
[SCSI] zfcp: Prevent usage w/o holding a reference
The ERP got values assigned for which no reference was taken. This can lead to an unpredictable race condition. Fix this by only assigning the values which are required and for which a reference was pulled or is held implicitly. Signed-off-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/s390/scsi')
-rw-r--r--drivers/s390/scsi/zfcp_erp.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index 63422c1..0bcd580 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -190,6 +190,9 @@ static struct zfcp_erp_action *zfcp_erp_setup_act(int need, u32 act_status,
atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE,
&zfcp_sdev->status);
erp_action = &zfcp_sdev->erp_action;
+ memset(erp_action, 0, sizeof(struct zfcp_erp_action));
+ erp_action->port = port;
+ erp_action->sdev = sdev;
if (!(atomic_read(&zfcp_sdev->status) &
ZFCP_STATUS_COMMON_RUNNING))
act_status |= ZFCP_STATUS_ERP_CLOSE_ONLY;
@@ -202,6 +205,8 @@ static struct zfcp_erp_action *zfcp_erp_setup_act(int need, u32 act_status,
zfcp_erp_action_dismiss_port(port);
atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status);
erp_action = &port->erp_action;
+ memset(erp_action, 0, sizeof(struct zfcp_erp_action));
+ erp_action->port = port;
if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_RUNNING))
act_status |= ZFCP_STATUS_ERP_CLOSE_ONLY;
break;
@@ -211,6 +216,7 @@ static struct zfcp_erp_action *zfcp_erp_setup_act(int need, u32 act_status,
zfcp_erp_action_dismiss_adapter(adapter);
atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status);
erp_action = &adapter->erp_action;
+ memset(erp_action, 0, sizeof(struct zfcp_erp_action));
if (!(atomic_read(&adapter->status) &
ZFCP_STATUS_COMMON_RUNNING))
act_status |= ZFCP_STATUS_ERP_CLOSE_ONLY;
@@ -220,10 +226,7 @@ static struct zfcp_erp_action *zfcp_erp_setup_act(int need, u32 act_status,
return NULL;
}
- memset(erp_action, 0, sizeof(struct zfcp_erp_action));
erp_action->adapter = adapter;
- erp_action->port = port;
- erp_action->sdev = sdev;
erp_action->action = need;
erp_action->status = act_status;
OpenPOWER on IntegriCloud