Hi Johannes,
I'm seeing warnings like this on 5.12.0-rc2 which I think were caused
by your patch.
[ 4.898946][ T455] ------------[ cut here ]------------
[ 4.899434][ T455] RTNL: assertion failed at net/core/dev.c (10988)
[ 4.900191][ T455] WARNING: CPU: 1 PID: 455 at
net/core/dev.c:10988 dev_change_net_namespace+0x680/0x730
[ 4.901042][ T455] Modules linked in: zram zsmalloc
vmw_vsock_virtio_transport virtio_pmem virtio_pci
virtio_pci_modern_dev virtio_net virtio_mmio virtio_input
virtio_console virtio_blk virtio_rng virtio_gpu virtio_dma_buf
vexpress_sysreg system_heap snd_hda_intel snd_intel_dspcfg
snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec snd_hda_core
rtc_test psmouse net_failover nd_virtio md_mod mac80211_hwsim
ledtrig_audio hci_vhci goldfish_sync(O) goldfish_pipe(O)
goldfish_battery(O) goldfish_address_space(O) failover dummy_hcd
dummy_cpufreq clk_vexpress_osc vexpress_config armmmci ambakmi
[ 4.906291][ T455] CPU: 1 PID: 455 Comm: iw Tainted: G O
5.12.0-rc2-mainline-08319-g19e2e1d25c10 #1
[ 4.907475][ T455] Hardware name: linux,ranchu (DT)
[ 4.907988][ T455] pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
[ 4.908627][ T455] pc : dev_change_net_namespace+0x680/0x730
[ 4.909168][ T455] lr : dev_change_net_namespace+0x680/0x730
[ 4.909725][ T455] sp : ffffffc012df3830
[ 4.910118][ T455] x29: ffffffc012df3870 x28: ffffff800dd8b240
[ 4.910693][ T455] x27: ffffff801ca76000 x26: 0000000000000008
[ 4.911212][ T455] x25: ffffff801cac3210 x24: ffffffc011b5ac40
[ 4.911848][ T455] x23: ffffff801ca768e0 x22: ffffffc011798506
[ 4.912382][ T455] x21: ffffffc011b5ac40 x20: ffffff800db0b240
[ 4.912793][ T455] x19: ffffff801cb00000 x18: ffffffc012549080
[ 4.913200][ T455] x17: 0000000000000006 x16: 000000000000b70d
[ 4.913612][ T455] x15: 0000000000000019 x14: 02a5000000000000
[ 4.914135][ T455] x13: 0000000000000000 x12: 000000005c961000
[ 4.914752][ T455] x11: ffffffc0119d6070 x10: 0000000000000000
[ 4.915238][ T455] x9 : a0858573fdaceb00 x8 : a0858573fdaceb00
[ 4.915836][ T455] x7 : ffffffc011715fa9 x6 : 0000000000000003
[ 4.916352][ T455] x5 : 0000000000000001 x4 : 0000000000000001
[ 4.916909][ T455] x3 : ffffff800dd8b240 x2 : ffffff807fbb5988
[ 4.917411][ T455] x1 : 0000000000000000 x0 : 0000000000000030
[ 4.918034][ T455] Call trace:
[ 4.918327][ T455] dev_change_net_namespace+0x680/0x730
[ 4.918827][ T455] cfg80211_switch_netns+0x90/0x1b8
[ 4.919305][ T455] nl80211_wiphy_netns+0x6c/0xf0
[ 4.919772][ T455] genl_rcv_msg+0x3c0/0x3ec
[ 4.920163][ T455] netlink_rcv_skb+0x108/0x124
[ 4.920650][ T455] genl_rcv+0x38/0x54
[ 4.920955][ T455] netlink_unicast_kernel+0xa0/0x140
[ 4.921484][ T455] netlink_unicast+0xfc/0x1a4
[ 4.921918][ T455] netlink_sendmsg+0x28c/0x320
[ 4.922363][ T455] ____sys_sendmsg+0x17c/0x234
[ 4.922786][ T455] __sys_sendmsg+0x190/0x1e8
[ 4.923183][ T455] __arm64_sys_sendmsg+0x28/0x38
[ 4.923557][ T455] el0_svc_common+0x94/0x118
[ 4.923921][ T455] do_el0_svc+0x28/0x88
[ 4.924223][ T455] el0_svc+0x2c/0x90
[ 4.924582][ T455] el0_sync_handler+0x88/0xec
[ 4.925113][ T455] el0_sync+0x194/0x1c0
[ 4.925572][ T455] ---[ end trace 8f99239e8a4e6dad ]---
[ 4.926322][ T455] ------------[ cut here ]------------
Peter
