[ 77.730848][ T942] veth0: entered allmulticast mode [ 77.732542][ T942] veth1: entered allmulticast mode [ 77.732930][ T942] veth2: entered allmulticast mode [ 77.733322][ T942] veth3: entered allmulticast mode [ 89.380323][ T1029] GACT probability NOT on [ 89.530642][ T1031] [ 89.530952][ T1031] ============================= [ 89.531113][ T1031] WARNING: suspicious RCU usage [ 89.531283][ T1031] 6.14.0-rc6-virtme #1 Not tainted [ 89.531435][ T1031] ----------------------------- [ 89.531587][ T1031] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 89.531868][ T1031] [ 89.531868][ T1031] other info that might help us debug this: [ 89.531868][ T1031] [ 89.532172][ T1031] [ 89.532172][ T1031] rcu_scheduler_active = 2, debug_locks = 1 [ 89.532395][ T1031] 1 lock held by mausezahn/1031: [ 89.532563][ T1031] #0: ffffffff8e55b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 89.532851][ T1031] [ 89.532851][ T1031] stack backtrace: [ 89.533039][ T1031] CPU: 0 UID: 0 PID: 1031 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 89.533043][ T1031] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 89.533045][ T1031] Call Trace: [ 89.533048][ T1031] [ 89.533051][ T1031] dump_stack_lvl+0xb0/0xd0 [ 89.533059][ T1031] lockdep_rcu_suspicious+0x1ea/0x280 [ 89.533072][ T1031] dev_hard_start_xmit+0x2fc/0x3f0 [ 89.533082][ T1031] __dev_queue_xmit+0xfaf/0x18d0 [ 89.533096][ T1031] ? __pfx___dev_queue_xmit+0x10/0x10 [ 89.533101][ T1031] ? packet_parse_headers+0x231/0x9c0 [ 89.533110][ T1031] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 89.533120][ T1031] ? __pfx_packet_parse_headers+0x10/0x10 [ 89.533125][ T1031] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 89.533131][ T1031] ? dev_get_by_index+0xb2/0x190 [ 89.533143][ T1031] packet_snd+0xd0c/0x19d0 [ 89.533155][ T1031] ? __lock_release+0x103/0x460 [ 89.533159][ T1031] ? __might_fault+0x11b/0x170 [ 89.533168][ T1031] ? __pfx_packet_snd+0x10/0x10 [ 89.533170][ T1031] ? trace_lock_acquire+0x14c/0x1f0 [ 89.533172][ T1031] ? __might_fault+0x11b/0x170 [ 89.533180][ T1031] ? lock_acquire+0x32/0xc0 [ 89.533186][ T1031] ? __might_fault+0x11b/0x170 [ 89.533197][ T1031] __sys_sendto+0x3c3/0x450 [ 89.533203][ T1031] ? __pfx___sys_sendto+0x10/0x10 [ 89.533217][ T1031] ? sock_ioctl+0x3b6/0x590 [ 89.533228][ T1031] ? __pfx___up_read+0x10/0x10 [ 89.533237][ T1031] ? do_user_addr_fault+0x374/0xe30 [ 89.533249][ T1031] ? do_user_addr_fault+0x374/0xe30 [ 89.533256][ T1031] __x64_sys_sendto+0xe0/0x1c0 [ 89.533259][ T1031] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 89.533265][ T1031] do_syscall_64+0xc1/0x1d0 [ 89.533273][ T1031] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 89.533279][ T1031] RIP: 0033:0x7f594d71fa4a [ 89.533284][ T1031] 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 [ 89.533288][ T1031] RSP: 002b:00007ffea7f70758 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 89.533292][ T1031] RAX: ffffffffffffffda RBX: 00000000234ff9d0 RCX: 00007f594d71fa4a [ 89.533294][ T1031] RDX: 000000000000002a RSI: 00000000234ffc92 RDI: 0000000000000005 [ 89.533296][ T1031] RBP: 00000000234ffc92 R08: 00007ffea7f70760 R09: 0000000000000014 [ 89.533298][ T1031] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 89.533300][ T1031] R13: 000000000000002a R14: 00007ffea7f70760 R15: 0000000000000000 [ 89.533316][ T1031] [ 97.130577][ T942] veth0: left allmulticast mode [ 97.130902][ T942] veth1: left allmulticast mode [ 97.131160][ T942] veth2: left allmulticast mode [ 97.131388][ T942] veth3: left allmulticast mode