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| author | Victor Nogueira <victor@mojatatu.com> | 2023-04-26 15:19:40 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-05-01 07:26:10 +0100 |
| commit | 526f28bd0fbdc699cda31426928802650c1528e5 (patch) | |
| tree | 2e1da3bd60b2f966714236885d8eb965bc130bb4 /net/sched | |
| parent | 6686317855c6997671982d4489ccdd946f644957 (diff) | |
| download | linux-stable-526f28bd0fbdc699cda31426928802650c1528e5.tar.gz linux-stable-526f28bd0fbdc699cda31426928802650c1528e5.tar.bz2 linux-stable-526f28bd0fbdc699cda31426928802650c1528e5.zip | |
net/sched: act_mirred: Add carrier check
There are cases where the device is adminstratively UP, but operationally
down. For example, we have a physical device (Nvidia ConnectX-6 Dx, 25Gbps)
who's cable was pulled out, here is its ip link output:
5: ens2f1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
link/ether b8:ce:f6:4b:68:35 brd ff:ff:ff:ff:ff:ff
altname enp179s0f1np1
As you can see, it's administratively UP but operationally down.
In this case, sending a packet to this port caused a nasty kernel hang (so
nasty that we were unable to capture it). Aborting a transmit based on
operational status (in addition to administrative status) fixes the issue.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Victor Nogueira <victor@mojatatu.com>
v1->v2: Add fixes tag
v2->v3: Remove blank line between tags + add change log, suggested by Leon
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched')
| -rw-r--r-- | net/sched/act_mirred.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sched/act_mirred.c b/net/sched/act_mirred.c index ec43764e92e7..0a711c184c29 100644 --- a/net/sched/act_mirred.c +++ b/net/sched/act_mirred.c @@ -264,7 +264,7 @@ TC_INDIRECT_SCOPE int tcf_mirred_act(struct sk_buff *skb, goto out; } - if (unlikely(!(dev->flags & IFF_UP))) { + if (unlikely(!(dev->flags & IFF_UP)) || !netif_carrier_ok(dev)) { net_notice_ratelimited("tc mirred to Houston: device %s is down\n", dev->name); goto out; |