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| author | Sven Eckelmann <sven@narfation.org> | 2021-05-18 21:00:27 +0200 |
|---|---|---|
| committer | Simon Wunderlich <sw@simonwunderlich.de> | 2021-05-18 21:10:01 +0200 |
| commit | 9f460ae31c4435fd022c443a6029352217a16ac1 (patch) | |
| tree | efee98392b0efe46553714a7f9acfc00c21683c7 | |
| parent | b741596468b010af2846b75f5e75a842ce344a6e (diff) | |
| download | linux-9f460ae31c4435fd022c443a6029352217a16ac1.tar.gz linux-9f460ae31c4435fd022c443a6029352217a16ac1.tar.bz2 linux-9f460ae31c4435fd022c443a6029352217a16ac1.zip | |
batman-adv: Avoid WARN_ON timing related checks
The soft/batadv interface for a queued OGM can be changed during the time
the OGM was queued for transmission and when the OGM is actually
transmitted by the worker.
But WARN_ON must be used to denote kernel bugs and not to print simple
warnings. A warning can simply be printed using pr_warn.
Reported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Reported-by: syzbot+c0b807de416427ff3dd1@syzkaller.appspotmail.com
Fixes: ef0a937f7a14 ("batman-adv: consider outgoing interface in OGM sending")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
| -rw-r--r-- | net/batman-adv/bat_iv_ogm.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c index 789f257be24f..fc8be49010b9 100644 --- a/net/batman-adv/bat_iv_ogm.c +++ b/net/batman-adv/bat_iv_ogm.c @@ -409,8 +409,10 @@ static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) if (WARN_ON(!forw_packet->if_outgoing)) return; - if (WARN_ON(forw_packet->if_outgoing->soft_iface != soft_iface)) + if (forw_packet->if_outgoing->soft_iface != soft_iface) { + pr_warn("%s: soft interface switch for queued OGM\n", __func__); return; + } if (forw_packet->if_incoming->if_status != BATADV_IF_ACTIVE) return; |