neighbour: Floor INTERVAL_PROBE_TIME_MS at 1000.

Previously, neigh_managed_work() was not rescheduled within
1s since commit ed6cd6a17896 ("net, neigh: Set lower cap for
neigh_managed_work rearming").

Later, commit 211da42eaa45 ("net, neigh: introduce
interval_probe_time_ms for periodic probe") added
INTERVAL_PROBE_TIME_MS and changed the limit to 1ms.

The limit actually did not work but was fixed with
netlink_range_validation by commit 6d79b223ec44 ("neighbour:
Enforce min/max to NDTPA_INTERVAL_PROBE_TIME_MS.").

neigh_table is now per-netns, and a user could hog CPU by setting
INTERVAL_PROBE_TIME_MS to a small value.

Let's floor the value at 1 second.

This is a user-visible change, but given we had the 1s floor before
and the default is 5s, it is unlikely that anyone but syzbot is
setting it below 1s and affected by this change.

Suggested-by: Ido Schimmel <idosch@nvidia.com>
Link: https://lore.kernel.org/netdev/20260902143023.GA3966681@shredder/
Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/20261013205816.1642597-5-kuniyu@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

0 files changed, 0 insertions, 0 deletions