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| author | Julia Lawall <Julia.Lawall@lip6.fr> | 2012-09-04 15:23:33 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-13 05:28:09 +0900 |
| commit | 2e54c4fb47ffcc687457f9bcd9bba895f2a84963 (patch) | |
| tree | ee7d6aff592064c28f8b258e129631f3a49a1e6d /drivers/s390 | |
| parent | e120cc4284dd532d5e9a44a4682eb4370e283619 (diff) | |
| download | lwn-2e54c4fb47ffcc687457f9bcd9bba895f2a84963.tar.gz lwn-2e54c4fb47ffcc687457f9bcd9bba895f2a84963.zip | |
SCSI: zfcp: remove invalid reference to list iterator variable
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 <Julia.Lawall@lip6.fr>
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com>
Reviewed-by: Martin Peschke <mpeschke@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/scsi/zfcp_cfdc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/s390/scsi/zfcp_cfdc.c b/drivers/s390/scsi/zfcp_cfdc.c index fab2c2592a97..8ed63aa9abea 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) || |