On Fri, Mar 19, 2021 at 03:12:12PM +0100, Jiri Kosina wrote:
> On Fri, 19 Mar 2021, Greg Kroah-Hartman wrote:
>
> > From: Jia-Ju Bai <baijiaju1990@xxxxxxxxx>
> >
> > [ Upstream commit 2055a99da8a253a357bdfd359b3338ef3375a26c ]
> >
> > When slave is NULL or slave_ops->ndo_neigh_setup is NULL, no error
> > return code of bond_neigh_init() is assigned.
> > To fix this bug, ret is assigned with -EINVAL in these cases.
> >
> > Fixes: 9e99bfefdbce ("bonding: fix bond_neigh_init()")
> > Reported-by: TOTE Robot <oslab@xxxxxxxxxxxxxxx>
> > Signed-off-by: Jia-Ju Bai <baijiaju1990@xxxxxxxxx>
> > Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
> > Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
> > ---
> > drivers/net/bonding/bond_main.c | 8 ++++++--
> > 1 file changed, 6 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
> > index 5fe5232cc3f3..fba6b6d1b430 100644
> > --- a/drivers/net/bonding/bond_main.c
> > +++ b/drivers/net/bonding/bond_main.c
> > @@ -3917,11 +3917,15 @@ static int bond_neigh_init(struct neighbour *n)
> >
> > rcu_read_lock();
> > slave = bond_first_slave_rcu(bond);
> > - if (!slave)
> > + if (!slave) {
> > + ret = -EINVAL;
> > goto out;
> > + }
> > slave_ops = slave->dev->netdev_ops;
> > - if (!slave_ops->ndo_neigh_setup)
> > + if (!slave_ops->ndo_neigh_setup) {
> > + ret = -EINVAL;
> > goto out;
> > + }
>
> This patch is completely broken and breaks bonding functionality
> altogether for me.
Is Linus's tree also broken for you? This showed up in 5.12-rc3.
thanks,
greg k-h
