On Mon, 22 Aug 2011, Jesper Juhl wrote: > On Mon, 22 Aug 2011, Julia Lawall wrote: > > > From: Julia Lawall <julia@xxxxxxx> > > > > The initializations of both fcoe_nport_scsi_transport and > > fcoe_vport_scsi_transport can fail, so test both of them. > > > > The semantic match that finds this problem is as follows: > > (http://coccinelle.lip6.fr/) > > > > // <smpl> > > @r@ > > identifier x,y,f!={PTR_ERR,ERR_PTR,ERR_CAST}; > > statement S; > > @@ > > > > x = f(...); > > ( > > if (\(x == NULL\|IS_ERR(x)\)) S > > | > > *if (\(y == NULL\|IS_ERR(y)\)) > > { ... when != x > > return ...; } > > ) > > // </smpl> > > > > Signed-off-by: Julia Lawall <julia@xxxxxxx> > > > > --- > > drivers/scsi/fcoe/fcoe.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c > > index ba710e3..921b636 100644 > > --- a/drivers/scsi/fcoe/fcoe.c > > +++ b/drivers/scsi/fcoe/fcoe.c > > @@ -1096,7 +1096,7 @@ static int __init fcoe_if_init(void) > > fcoe_vport_scsi_transport = > > fc_attach_transport(&fcoe_vport_fc_functions); > > > > - if (!fcoe_nport_scsi_transport) { > > + if (!fcoe_nport_scsi_transport || !fcoe_vport_scsi_transport) { > > printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); > > return -ENODEV; > > } > > > > I only took a quick look, so I may have overlooked something, so bear with > me. > > fc_attach_transport() allocates memory with kzalloc. If either call fails > the other may have succeeded and we'll leak the memory allocated to one of > them. > > Shouldn't we be kfree()'ing the two variables before the 'return -ENODEV'? It seems reasonable. julia -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
