[ 11.051768][ T250] ip (250) used greatest stack depth: 23600 bytes left [ 14.395076][ T304] br1: port 1(veth1) entered blocking state [ 14.395554][ T304] br1: port 1(veth1) entered disabled state [ 14.395954][ T304] veth1: entered allmulticast mode [ 14.398012][ T304] veth1: entered promiscuous mode [ 14.491000][ T72] br1: port 1(veth1) entered blocking state [ 14.491470][ T72] br1: port 1(veth1) entered forwarding state [ 14.580811][ T307] br1: port 2(veth2) entered blocking state [ 14.581123][ T307] br1: port 2(veth2) entered disabled state [ 14.581785][ T307] veth2: entered allmulticast mode [ 14.583766][ T307] veth2: entered promiscuous mode [ 14.662901][ T41] br1: port 2(veth2) entered blocking state [ 14.663278][ T41] br1: port 2(veth2) entered forwarding state [ 23.378931][ T352] tc (352) used greatest stack depth: 23336 bytes left [ 23.579608][ T357] GACT probability NOT on [ 23.706051][ T358] [ 23.706390][ T358] ============================= [ 23.706554][ T358] WARNING: suspicious RCU usage [ 23.706709][ T358] 6.14.0-rc6-virtme #1 Not tainted [ 23.706889][ T358] ----------------------------- [ 23.707062][ T358] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 23.707376][ T358] [ 23.707376][ T358] other info that might help us debug this: [ 23.707376][ T358] [ 23.707673][ T358] [ 23.707673][ T358] rcu_scheduler_active = 2, debug_locks = 1 [ 23.707900][ T358] 1 lock held by mausezahn/358: [ 23.708072][ T358] #0: ffffffff9315b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 23.708376][ T358] [ 23.708376][ T358] stack backtrace: [ 23.708572][ T358] CPU: 3 UID: 0 PID: 358 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 23.708576][ T358] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 23.708578][ T358] Call Trace: [ 23.708580][ T358] [ 23.708583][ T358] dump_stack_lvl+0xb0/0xd0 [ 23.708590][ T358] lockdep_rcu_suspicious+0x1ea/0x280 [ 23.708601][ T358] dev_hard_start_xmit+0x2fc/0x3f0 [ 23.708611][ T358] __dev_queue_xmit+0xfaf/0x18d0 [ 23.708625][ T358] ? __pfx___dev_queue_xmit+0x10/0x10 [ 23.708630][ T358] ? packet_parse_headers+0x231/0x9c0 [ 23.708638][ T358] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 23.708644][ T358] ? __pfx_packet_parse_headers+0x10/0x10 [ 23.708649][ T358] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 23.708654][ T358] ? dev_get_by_index+0xb2/0x190 [ 23.708665][ T358] packet_snd+0xd0c/0x19d0 [ 23.708676][ T358] ? __lock_release+0x103/0x460 [ 23.708680][ T358] ? __might_fault+0x11b/0x170 [ 23.708687][ T358] ? __pfx_packet_snd+0x10/0x10 [ 23.708689][ T358] ? trace_lock_acquire+0x14c/0x1f0 [ 23.708692][ T358] ? __might_fault+0x11b/0x170 [ 23.708699][ T358] ? lock_acquire+0x32/0xc0 [ 23.708705][ T358] ? __might_fault+0x11b/0x170 [ 23.708716][ T358] __sys_sendto+0x3c3/0x450 [ 23.708721][ T358] ? __pfx___sys_sendto+0x10/0x10 [ 23.708736][ T358] ? sock_ioctl+0x3b6/0x590 [ 23.708746][ T358] ? __pfx___up_read+0x10/0x10 [ 23.708753][ T358] ? do_user_addr_fault+0x374/0xe30 [ 23.708763][ T358] ? do_user_addr_fault+0x374/0xe30 [ 23.708770][ T358] __x64_sys_sendto+0xe0/0x1c0 [ 23.708774][ T358] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 23.708779][ T358] do_syscall_64+0xc1/0x1d0 [ 23.708787][ T358] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.708792][ T358] RIP: 0033:0x7fd616bd7a4a [ 23.708796][ T358] 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 [ 23.708799][ T358] RSP: 002b:00007ffd2b0e40a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 23.708803][ T358] RAX: ffffffffffffffda RBX: 0000000025a0b9d0 RCX: 00007fd616bd7a4a [ 23.708805][ T358] RDX: 0000000000000086 RSI: 0000000025a0bce2 RDI: 0000000000000005 [ 23.708807][ T358] RBP: 0000000025a0bce2 R08: 00007ffd2b0e40b0 R09: 0000000000000014 [ 23.708808][ T358] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 23.708810][ T358] R13: 0000000000000086 R14: 00007ffd2b0e40b0 R15: 0000000000000000 [ 23.708826][ T358] [ 33.212450][ T508] br1: port 2(veth2) entered disabled state [ 33.316568][ T509] veth2: left allmulticast mode [ 33.316883][ T509] veth2: left promiscuous mode [ 33.317349][ T509] br1: port 2(veth2) entered disabled state [ 33.410119][ T510] br1: port 1(veth1) entered disabled state [ 33.500289][ T511] veth1: left allmulticast mode [ 33.500550][ T511] veth1: left promiscuous mode [ 33.500876][ T511] br1: port 1(veth1) entered disabled state