[ 11.421202][ T280] veth0: entered allmulticast mode [ 11.422064][ T280] veth1: entered allmulticast mode [ 11.422689][ T280] veth2: entered allmulticast mode [ 11.423033][ T280] veth3: entered allmulticast mode [ 11.914277][ T285] ip (285) used greatest stack depth: 23952 bytes left [ 22.886419][ T368] GACT probability NOT on [ 23.040687][ T370] [ 23.041060][ T370] ============================= [ 23.041255][ T370] WARNING: suspicious RCU usage [ 23.041638][ T370] 6.14.0-rc6-virtme #1 Not tainted [ 23.041793][ T370] ----------------------------- [ 23.041950][ T370] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 23.042224][ T370] [ 23.042224][ T370] other info that might help us debug this: [ 23.042224][ T370] [ 23.042519][ T370] [ 23.042519][ T370] rcu_scheduler_active = 2, debug_locks = 1 [ 23.042753][ T370] 1 lock held by mausezahn/370: [ 23.042915][ T370] #0: ffffffffba55b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 23.043221][ T370] [ 23.043221][ T370] stack backtrace: [ 23.043413][ T370] CPU: 1 UID: 0 PID: 370 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 23.043418][ T370] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 23.043421][ T370] Call Trace: [ 23.043423][ T370] [ 23.043426][ T370] dump_stack_lvl+0xb0/0xd0 [ 23.043434][ T370] lockdep_rcu_suspicious+0x1ea/0x280 [ 23.043447][ T370] dev_hard_start_xmit+0x2fc/0x3f0 [ 23.043457][ T370] __dev_queue_xmit+0xfaf/0x18d0 [ 23.043472][ T370] ? __pfx___dev_queue_xmit+0x10/0x10 [ 23.043476][ T370] ? packet_parse_headers+0x231/0x9c0 [ 23.043486][ T370] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 23.043493][ T370] ? __pfx_packet_parse_headers+0x10/0x10 [ 23.043498][ T370] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 23.043504][ T370] ? dev_get_by_index+0xb2/0x190 [ 23.043516][ T370] packet_snd+0xd0c/0x19d0 [ 23.043528][ T370] ? __lock_release+0x103/0x460 [ 23.043532][ T370] ? __might_fault+0x11b/0x170 [ 23.043541][ T370] ? __pfx_packet_snd+0x10/0x10 [ 23.043543][ T370] ? trace_lock_acquire+0x14c/0x1f0 [ 23.043546][ T370] ? __might_fault+0x11b/0x170 [ 23.043553][ T370] ? lock_acquire+0x32/0xc0 [ 23.043560][ T370] ? __might_fault+0x11b/0x170 [ 23.043571][ T370] __sys_sendto+0x3c3/0x450 [ 23.043577][ T370] ? __pfx___sys_sendto+0x10/0x10 [ 23.043592][ T370] ? sock_ioctl+0x3b6/0x590 [ 23.043602][ T370] ? __pfx___up_read+0x10/0x10 [ 23.043612][ T370] ? do_user_addr_fault+0x374/0xe30 [ 23.043623][ T370] ? do_user_addr_fault+0x374/0xe30 [ 23.043630][ T370] __x64_sys_sendto+0xe0/0x1c0 [ 23.043634][ T370] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 23.043640][ T370] do_syscall_64+0xc1/0x1d0 [ 23.043649][ T370] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.043655][ T370] RIP: 0033:0x7f4e53dc2a4a [ 23.043661][ T370] 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 [ 23.043665][ T370] RSP: 002b:00007ffdf787e378 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 23.043669][ T370] RAX: ffffffffffffffda RBX: 000000002ecf19d0 RCX: 00007f4e53dc2a4a [ 23.043671][ T370] RDX: 000000000000002a RSI: 000000002ecf1c92 RDI: 0000000000000005 [ 23.043673][ T370] RBP: 000000002ecf1c92 R08: 00007ffdf787e380 R09: 0000000000000014 [ 23.043675][ T370] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 23.043677][ T370] R13: 000000000000002a R14: 00007ffdf787e380 R15: 0000000000000000 [ 23.043694][ T370] [ 30.224717][ T280] veth0: left allmulticast mode [ 30.225071][ T280] veth1: left allmulticast mode [ 30.225339][ T280] veth2: left allmulticast mode [ 30.225585][ T280] veth3: left allmulticast mode