On Fri, 22 Jun 2018 07:20:56 +0900 (KST) David Miller <[email protected]> wrote:
> From: Garry McNulty <[email protected]> > Date: Thu, 21 Jun 2018 21:14:27 +0100 > > > br_port_get_rtnl() can return NULL if the network device is not a bridge > > port (IFF_BRIDGE_PORT flag not set). br_port_slave_changelink() and > > br_port_fill_slave_info() callbacks dereference this pointer without > > checking. Currently this is not a problem because slave devices always > > set this flag. Add null check in case these conditions ever change. > > > > Detected by CoverityScan, CID 1339613 ("Dereference null return value") > > > > Signed-off-by: Garry McNulty <[email protected]> > > I don't think this is reasonable. > > The bridge code will never, ever, install a slave that doesn't have > that bit set. It's the most fundamental aspect of how these objects > are managed. Agree with dave. Workarounds for static tools are ok if they don't introduce other paths. But if your fix introduces another error path which can never be reached, it is hurting not helping.
