net/sched: act_mirred: Add carrier check
stable inclusion from stable-v5.10.180 commit 774da70521564b3ebbc4d53402a960b1726ae94e category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8FC2O Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=774da70521564b3ebbc4d53402a960b1726ae94e -------------------------------- [ Upstream commit 526f28bd ] 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: 1da177e4 ("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> Signed-off-by:
Sasha Levin <sashal@kernel.org> Signed-off-by:
sanglipeng <sanglipeng1@jd.com>
Loading
Please sign in to comment