[ 1429.096457][T18662] veth0: entered allmulticast mode
[ 1429.099096][T18662] veth1: entered allmulticast mode
[ 1429.100261][T18662] veth2: entered allmulticast mode
[ 1429.100806][T18662] veth3: entered allmulticast mode
[ 1440.799977][T18748] 
[ 1440.800324][T18748] =============================
[ 1440.800489][T18748] WARNING: suspicious RCU usage
[ 1440.800646][T18748] 6.14.0-rc6-virtme #1 Not tainted
[ 1440.800821][T18748] -----------------------------
[ 1440.800991][T18748] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage!
[ 1440.801269][T18748] 
[ 1440.801269][T18748] other info that might help us debug this:
[ 1440.801269][T18748] 
[ 1440.801569][T18748] 
[ 1440.801569][T18748] rcu_scheduler_active = 2, debug_locks = 1
[ 1440.801795][T18748] 1 lock held by mausezahn/18748:
[ 1440.801965][T18748]  #0: ffffffffaab5b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0
[ 1440.802288][T18748] 
[ 1440.802288][T18748] stack backtrace:
[ 1440.802483][T18748] CPU: 3 UID: 0 PID: 18748 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1
[ 1440.802488][T18748] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1440.802490][T18748] Call Trace:
[ 1440.802493][T18748]  <TASK>
[ 1440.802495][T18748]  dump_stack_lvl+0xb0/0xd0
[ 1440.802504][T18748]  lockdep_rcu_suspicious+0x1ea/0x280
[ 1440.802516][T18748]  dev_hard_start_xmit+0x2fc/0x3f0
[ 1440.802527][T18748]  __dev_queue_xmit+0xfaf/0x18d0
[ 1440.802541][T18748]  ? __pfx___dev_queue_xmit+0x10/0x10
[ 1440.802545][T18748]  ? packet_parse_headers+0x231/0x9c0
[ 1440.802555][T18748]  ? __pfx_sock_alloc_send_pskb+0x10/0x10
[ 1440.802562][T18748]  ? __pfx_packet_parse_headers+0x10/0x10
[ 1440.802567][T18748]  ? skb_copy_datagram_from_iter+0xe6/0x6f0
[ 1440.802573][T18748]  ? dev_get_by_index+0xb2/0x190
[ 1440.802586][T18748]  packet_snd+0xd0c/0x19d0
[ 1440.802597][T18748]  ? __lock_release+0x103/0x460
[ 1440.802602][T18748]  ? __might_fault+0x11b/0x170
[ 1440.802610][T18748]  ? __pfx_packet_snd+0x10/0x10
[ 1440.802612][T18748]  ? trace_lock_acquire+0x14c/0x1f0
[ 1440.802615][T18748]  ? __might_fault+0x11b/0x170
[ 1440.802622][T18748]  ? lock_acquire+0x32/0xc0
[ 1440.802628][T18748]  ? __might_fault+0x11b/0x170
[ 1440.802639][T18748]  __sys_sendto+0x3c3/0x450
[ 1440.802645][T18748]  ? __pfx___sys_sendto+0x10/0x10
[ 1440.802660][T18748]  ? sock_ioctl+0x3b6/0x590
[ 1440.802671][T18748]  ? __pfx___up_read+0x10/0x10
[ 1440.802681][T18748]  ? do_user_addr_fault+0x374/0xe30
[ 1440.802692][T18748]  ? do_user_addr_fault+0x374/0xe30
[ 1440.802699][T18748]  __x64_sys_sendto+0xe0/0x1c0
[ 1440.802703][T18748]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[ 1440.802708][T18748]  do_syscall_64+0xc1/0x1d0
[ 1440.802717][T18748]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 1440.802723][T18748] RIP: 0033:0x7f2bf76e4a4a
[ 1440.802728][T18748] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 15 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 7e c3 0f 1f 44 00 00 41 54 48 83 ec 30 44 89
[ 1440.802731][T18748] RSP: 002b:00007ffeb20a0828 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[ 1440.802735][T18748] RAX: ffffffffffffffda RBX: 00000000393709d0 RCX: 00007f2bf76e4a4a
[ 1440.802737][T18748] RDX: 000000000000002a RSI: 0000000039370c92 RDI: 0000000000000005
[ 1440.802739][T18748] RBP: 0000000039370c92 R08: 00007ffeb20a0830 R09: 0000000000000014
[ 1440.802741][T18748] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 1440.802743][T18748] R13: 000000000000002a R14: 00007ffeb20a0830 R15: 0000000000000000
[ 1440.802759][T18748]  </TASK>
[ 1448.057893][T18662] veth0: left allmulticast mode
[ 1448.058230][T18662] veth1: left allmulticast mode
[ 1448.058474][T18662] veth2: left allmulticast mode
[ 1448.058719][T18662] veth3: left allmulticast mode