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scsi: fcoe: fix null-ptr-deref Read in fc_release_transport 

In fcoe_if_init, if fc_attach_transport(&fcoe_vport_fc_functions)
fails, need to free the previously memory and return fail, otherwise
will trigger null-ptr-deref Read in fc_release_transport.

fcoe_exit
  fcoe_if_exit
    fc_release_transport(fcoe_vport_scsi_transport)

Link: https://lore.kernel.org/r/1566279789-58207-1-git-send-email-zhengbin13@huawei.com
Reported-by: Hulk Robot <hulkci@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
zhengbin 2019-08-20 13:43:09 +08:00 committed by Martin K. Petersen
parent 7ce5eed099
commit f96d279f0a
1 changed files with 11 additions and 5 deletions
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16
drivers/scsi/fcoe/fcoe.c
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@ -1250,15 +1250,21 @@ static int __init fcoe_if_init(void)
/* attach to scsi transport */
fcoe_nport_scsi_transport =
fc_attach_transport(&fcoe_nport_fc_functions);
if (!fcoe_nport_scsi_transport)
goto err;
fcoe_vport_scsi_transport =
fc_attach_transport(&fcoe_vport_fc_functions);
if (!fcoe_nport_scsi_transport) {
printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
return -ENODEV;
}
if (!fcoe_vport_scsi_transport)
goto err_vport;
return 0;
err_vport:
fc_release_transport(fcoe_nport_scsi_transport);
err:
printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
return -ENODEV;
}
/**