SCSI: zfcp: remove invalid reference to list iterator variable
authorJulia Lawall <Julia.Lawall@lip6.fr>
Tue, 4 Sep 2012 13:23:33 +0000 (15:23 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 12 Oct 2012 20:38:47 +0000 (05:38 +0900)
commitab37eb284ac88f092187f7c4ee4a42c28cdaf3e5
tree6b972180aada44cebff0e6986b1174e2a9814bde
parent530bab7e87951aea1ae20706174021c3355f305a
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>
drivers/s390/scsi/zfcp_cfdc.c