The fix for this was submitted as [PATCH] nl80211: fix locking for wireless device netns change It looks like johill needs to accept his own change still: https://patchwork.kernel.org/project/linux-wireless/patch/20210310215839.eadf7c43781b.I5fc6cf6676f800ab8008e03bbea9c3349b02d804@changeid/ Thanks, Zero On Tue, Mar 16, 2021 at 2:48 PM Torsten Hilbrich <torsten.hilbrich@xxxxxxxxxxx> wrote: > > Hello, > > starting with kernel v5.12-rc1 (and still not working in v5.12-rc3) I'm no longer able to move a wlan interface into another namespace. > > I have created a new network namespace, like in the following example: > > # ip netns add black > > Then I move the phy0 interface to that network namespace. I then expect the wlan0 interface to be removed from the initial network namespace and then to appear in the new one. > > # iw phy phy0 set netns name black > > However, starting with v5.12-rc1 (last known to be working with v5.11) the command never finishes execution. Instead, I get a number of rntl warnings and a soft hangup. > > Kernel log is attached. > > Here some relevant excerpts: > > 2021-03-16 11:26:49.124 kernel: iwlwifi 0000:3a:00.0: Detected Intel(R) Dual Band Wireless AC 8265, REV=0x230 > > 2021-03-16 11:27:14.269 kernel: WARNING: CPU: 0 PID: 467 at net/core/dev.c:10988 dev_change_net_namespace+0x44d/0x480 > 2021-03-16 11:27:14.269 kernel: WARNING: CPU: 0 PID: 467 at net/core/dev.c:381 unlist_netdevice+0xdb/0xf0 > 2021-03-16 11:27:14.275 kernel: WARNING: CPU: 0 PID: 467 at net/core/dev.c:2054 call_netdevice_notifiers_info+0x7c/0x80 > 2021-03-16 11:27:14.275 kernel: WARNING: CPU: 0 PID: 467 at net/core/fib_rules.c:1227 fib_rules_event+0x18f/0x1a0 > 2021-03-16 11:27:14.275 kernel: WARNING: CPU: 0 PID: 467 at net/ipv4/devinet.c:1526 inetdev_event+0x39f/0x5c0 > 2021-03-16 11:27:14.276 kernel: WARNING: CPU: 0 PID: 467 at net/ipv4/devinet.c:309 inetdev_event+0x4a9/0x5c0 > 2021-03-16 11:27:14.276 kernel: WARNING: CPU: 0 PID: 467 at net/ipv4/igmp.c:1793 ip_mc_destroy_dev+0x67/0x70 > 2021-03-16 11:27:14.277 kernel: WARNING: CPU: 0 PID: 467 at net/ipv4/igmp.c:1721 ip_mc_down+0x84/0x90 > 2021-03-16 11:27:14.277 kernel: WARNING: CPU: 0 PID: 467 at net/ipv4/igmp.c:1664 __ip_mc_dec_group+0x162/0x1a0 > > 2021-03-16 11:27:14.278 kernel: ---[ end trace 6b632a15496dddfa ]--- > 2021-03-16 11:30:24.753 kernel: INFO: task iw:467 blocked for more than 122 seconds. > 2021-03-16 11:30:24.753 kernel: Tainted: P W O 5.12.0-devel+ #1 > 2021-03-16 11:30:24.753 kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > 2021-03-16 11:30:24.753 kernel: task:iw state:D stack:12720 pid: 467 ppid: 457 flags:0x00004000 > 2021-03-16 11:30:24.753 kernel: Call Trace: > 2021-03-16 11:30:24.753 kernel: __schedule+0x275/0x660 > 2021-03-16 11:30:24.753 kernel: schedule+0x3c/0xa0 > 2021-03-16 11:30:24.753 kernel: schedule_preempt_disabled+0xa/0x10 > 2021-03-16 11:30:24.753 kernel: __mutex_lock.isra.12+0x2c7/0x4c0 > 2021-03-16 11:30:24.753 kernel: ? trace_hardirqs_on+0x2a/0xb0 > 2021-03-16 11:30:24.753 kernel: ? skb_dequeue+0x57/0x70 > 2021-03-16 11:30:24.753 kernel: cfg80211_netdev_notifier_call+0x23d/0x3e0 > 2021-03-16 11:30:24.753 kernel: raw_notifier_call_chain+0x41/0x50 > 2021-03-16 11:30:24.753 kernel: dev_change_net_namespace+0xe1/0x480 > 2021-03-16 11:30:24.753 kernel: ? __rtnl_unlock+0x25/0x50 > 2021-03-16 11:30:24.753 kernel: cfg80211_switch_netns+0x65/0x1c0 > 2021-03-16 11:30:24.753 kernel: nl80211_wiphy_netns+0x4b/0xc0 > 2021-03-16 11:30:24.753 kernel: genl_family_rcv_msg_doit.isra.17+0x10f/0x150 > 2021-03-16 11:30:24.753 kernel: genl_rcv_msg+0xde/0x1e0 > 2021-03-16 11:30:24.753 kernel: ? nl80211_authenticate+0x310/0x310 > 2021-03-16 11:30:24.753 kernel: ? genl_family_rcv_msg_doit.isra.17+0x150/0x150 > 2021-03-16 11:30:24.753 kernel: netlink_rcv_skb+0x50/0x100 > 2021-03-16 11:30:24.753 kernel: genl_rcv+0x24/0x40 > 2021-03-16 11:30:24.754 kernel: netlink_unicast+0x1a5/0x280 > 2021-03-16 11:30:24.754 kernel: netlink_sendmsg+0x21b/0x450 > 2021-03-16 11:30:24.754 kernel: sock_sendmsg+0x5b/0x60 > 2021-03-16 11:30:24.754 kernel: ____sys_sendmsg+0x1ad/0x1e0 > 2021-03-16 11:30:24.754 kernel: ? copy_msghdr_from_user+0x5c/0x90 > 2021-03-16 11:30:24.754 kernel: ___sys_sendmsg+0x84/0xc0 > 2021-03-16 11:30:24.754 kernel: ? do_filp_open+0xa7/0x100 > 2021-03-16 11:30:24.754 kernel: __sys_sendmsg+0x51/0x90 > 2021-03-16 11:30:24.754 kernel: do_syscall_64+0x33/0x40 > 2021-03-16 11:30:24.754 kernel: entry_SYSCALL_64_after_hwframe+0x44/0xae > > > With regards, > > Torsten >
