Re: [PATCH v1 net-next 4/5] ipv4: fib: Avoid calling fib_trie_table() in fib_new_table() for dying net.

On Fri, Jun 12, 2026 at 06:32:07AM +0000, Kuniyuki Iwashima wrote:

We will call ip_fib_net_exit() from ->exit_rtnl().

All fib_table will be destroyed before devices are unregistered.

During device unregistration, inetdev_destroy() could call
fib_del_ifaddr(), which calls fib_magic(RTM_DELROUTE).

fib_magic() calls fib_new_table(), but we do not want to create
a new table after ip_fib_net_exit() destroys all tables.

As a prep, let's add check_net() before fib_trie_table() in
fib_new_table().

fib_trie_table() is also called from fib_trie_unmerge(), but
fib_get_table() fails first in fib_unmerge(), so the same
problem does not occur there.

Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>

Reviewed-by: Ido Schimmel <idosch@nvidia.com>