[ 10.798175][ T251] ip (251) used greatest stack depth: 24168 bytes left [ 12.222423][ T286] veth0: entered allmulticast mode [ 12.223189][ T286] veth1: entered allmulticast mode [ 12.223538][ T286] veth2: entered allmulticast mode [ 12.223868][ T286] veth3: entered allmulticast mode [ 12.225404][ T286] veth4: entered allmulticast mode [ 12.225746][ T286] veth5: entered allmulticast mode [ 23.327395][ T373] GACT probability NOT on [ 23.602944][ T377] [ 23.603283][ T377] ============================= [ 23.603555][ T377] WARNING: suspicious RCU usage [ 23.603706][ T377] 6.14.0-rc6-virtme #1 Not tainted [ 23.603856][ T377] ----------------------------- [ 23.604021][ T377] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 23.604288][ T377] [ 23.604288][ T377] other info that might help us debug this: [ 23.604288][ T377] [ 23.604583][ T377] [ 23.604583][ T377] rcu_scheduler_active = 2, debug_locks = 1 [ 23.604814][ T377] 1 lock held by mausezahn/377: [ 23.604968][ T377] #0: ffffffff8db5b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 23.605265][ T377] [ 23.605265][ T377] stack backtrace: [ 23.605454][ T377] CPU: 3 UID: 0 PID: 377 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 23.605459][ T377] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 23.605461][ T377] Call Trace: [ 23.605463][ T377] [ 23.605466][ T377] dump_stack_lvl+0xb0/0xd0 [ 23.605474][ T377] lockdep_rcu_suspicious+0x1ea/0x280 [ 23.605486][ T377] dev_hard_start_xmit+0x2fc/0x3f0 [ 23.605496][ T377] __dev_queue_xmit+0xfaf/0x18d0 [ 23.605511][ T377] ? __pfx___dev_queue_xmit+0x10/0x10 [ 23.605515][ T377] ? packet_parse_headers+0x231/0x9c0 [ 23.605524][ T377] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 23.605531][ T377] ? __pfx_packet_parse_headers+0x10/0x10 [ 23.605535][ T377] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 23.605541][ T377] ? dev_get_by_index+0xb2/0x190 [ 23.605553][ T377] packet_snd+0xd0c/0x19d0 [ 23.605565][ T377] ? __lock_release+0x103/0x460 [ 23.605569][ T377] ? __might_fault+0x11b/0x170 [ 23.605577][ T377] ? __pfx_packet_snd+0x10/0x10 [ 23.605579][ T377] ? trace_lock_acquire+0x14c/0x1f0 [ 23.605581][ T377] ? __might_fault+0x11b/0x170 [ 23.605588][ T377] ? lock_acquire+0x32/0xc0 [ 23.605594][ T377] ? __might_fault+0x11b/0x170 [ 23.605606][ T377] __sys_sendto+0x3c3/0x450 [ 23.605612][ T377] ? __pfx___sys_sendto+0x10/0x10 [ 23.605627][ T377] ? sock_ioctl+0x3b6/0x590 [ 23.605638][ T377] ? __pfx___up_read+0x10/0x10 [ 23.605647][ T377] ? do_user_addr_fault+0x374/0xe30 [ 23.605658][ T377] ? do_user_addr_fault+0x374/0xe30 [ 23.605666][ T377] __x64_sys_sendto+0xe0/0x1c0 [ 23.605669][ T377] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 23.605675][ T377] do_syscall_64+0xc1/0x1d0 [ 23.605683][ T377] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.605689][ T377] RIP: 0033:0x7fc693fcaa4a [ 23.605694][ T377] 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 [ 23.605697][ T377] RSP: 002b:00007ffee3f53e98 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 23.605701][ T377] RAX: ffffffffffffffda RBX: 0000000004efc9d0 RCX: 00007fc693fcaa4a [ 23.605703][ T377] RDX: 00000000000000aa RSI: 0000000004efcd02 RDI: 0000000000000005 [ 23.605705][ T377] RBP: 0000000004efcd02 R08: 00007ffee3f53ea0 R09: 0000000000000014 [ 23.605707][ T377] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 23.605708][ T377] R13: 00000000000000aa R14: 00007ffee3f53ea0 R15: 0000000000000000 [ 23.605725][ T377] [ 38.621290][ T286] veth0: left allmulticast mode [ 38.621613][ T286] veth1: left allmulticast mode [ 38.621855][ T286] veth2: left allmulticast mode [ 38.622112][ T286] veth3: left allmulticast mode [ 38.622348][ T286] veth4: left allmulticast mode [ 38.622585][ T286] veth5: left allmulticast mode