Pedro Tammela 3d1dc71b8f net/sched: make psched_mtu() RTNL-less safe
[ Upstream commit 150e33e62c1fa4af5aaab02776b6c3812711d478 ]

Eric Dumazet says[1]:
-------
Speaking of psched_mtu(), I see that net/sched/sch_pie.c is using it
without holding RTNL, so dev->mtu can be changed underneath.
KCSAN could issue a warning.
-------

Annotate dev->mtu with READ_ONCE() so KCSAN don't issue a warning.

[1] https://lore.kernel.org/all/CANn89iJoJO5VtaJ-2=_d2aOQhb0Xw8iBT_Cxqp2HyuS-zj6azw@mail.gmail.com/

v1 -> v2: Fix commit message

Fixes: d4b36210c2e6 ("net: pkt_sched: PIE AQM scheme")
Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20230711021634.561598-1-pctammela@mojatatu.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-07-23 13:49:27 +02:00
..
2021-07-01 13:19:48 -07:00
2022-06-22 12:59:43 +01:00
2022-08-23 10:43:11 +02:00
2022-07-28 22:06:15 -07:00
2022-08-09 22:14:02 -07:00
2022-09-30 18:17:17 -07:00
2021-12-16 07:18:35 -08:00
2021-10-15 11:33:08 +01:00
2021-10-13 09:40:46 -07:00
2021-07-27 13:05:56 +01:00
2022-05-11 12:43:10 +01:00
2023-04-13 16:55:23 +02:00
2022-06-19 10:00:02 +01:00
2023-06-14 11:15:20 +02:00
2021-08-03 13:05:26 +01:00