I left one dev_put() in br_add_if() error path and sure enough
syzbot found its way.
As the tracker is allocated in new_nbp(), we must make sure
to properly free it.
We have to call dev_put_track(dev, &p->dev_tracker) before
@p object is freed, of course. This is not an issue because
br_add_if() owns a reference on @dev.
Fixes: b2dcdc7f731d ("net: bridge: add net device refcount tracker")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
fcfb894d59