netdev: don't use dev->flags for IFF_UP

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dev->flags are not technically ops lock protected. The IFF_UP flag
will not change when dev->lock is held, but other flags may change
so KCSAN would probably not be impressed. Because of this we added
a dedicated dev->up which is safe to read under dev->lock.

qstats want to make sure device is up, use dev->up.

Reviewed-by: Bobby Eshleman <bobbyeshleman@meta.com>
Reviewed-by: Joe Damato <joe@dama.to>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://patch.msgid.link/20260831164159.1124679-4-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Jakub Kicinski 2026-08-31 09:41:58 -07:00

parent fcfb5ff9df

commit 17d7aa6954

1 changed files with 1 additions and 1 deletions

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net/core/netdev-genl.c

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