[ 11.384715][ T273] ip (273) used greatest stack depth: 23120 bytes left [ 15.748673][ T369] br: port 1(veth1) entered blocking state [ 15.749077][ T369] br: port 1(veth1) entered disabled state [ 15.749433][ T369] veth1: entered allmulticast mode [ 15.751403][ T369] veth1: entered promiscuous mode [ 15.753862][ T38] br: port 1(veth1) entered blocking state [ 15.754287][ T38] br: port 1(veth1) entered forwarding state [ 15.877949][ T374] br: port 2(veth3) entered blocking state [ 15.878281][ T374] br: port 2(veth3) entered disabled state [ 15.878548][ T374] veth3: entered allmulticast mode [ 15.880708][ T374] veth3: entered promiscuous mode [ 15.882171][ T40] br: port 2(veth3) entered blocking state [ 15.882436][ T40] br: port 2(veth3) entered forwarding state [ 15.998696][ T379] br: port 3(veth4) entered blocking state [ 15.998990][ T379] br: port 3(veth4) entered disabled state [ 15.999269][ T379] veth4: entered allmulticast mode [ 16.001127][ T379] veth4: entered promiscuous mode [ 16.010397][ T41] br: port 3(veth4) entered blocking state [ 16.010700][ T41] br: port 3(veth4) entered forwarding state [ 27.109605][ T467] [ 27.109895][ T467] ============================= [ 27.110065][ T467] WARNING: suspicious RCU usage [ 27.110245][ T467] 6.14.0-rc6-virtme #1 Not tainted [ 27.110445][ T467] ----------------------------- [ 27.110601][ T467] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 27.110875][ T467] [ 27.110875][ T467] other info that might help us debug this: [ 27.110875][ T467] [ 27.111195][ T467] [ 27.111195][ T467] rcu_scheduler_active = 2, debug_locks = 1 [ 27.111424][ T467] 1 lock held by mausezahn/467: [ 27.111596][ T467] #0: ffffffffb7f5b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 27.111894][ T467] [ 27.111894][ T467] stack backtrace: [ 27.112088][ T467] CPU: 1 UID: 0 PID: 467 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 27.112092][ T467] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 27.112095][ T467] Call Trace: [ 27.112097][ T467] [ 27.112100][ T467] dump_stack_lvl+0xb0/0xd0 [ 27.112109][ T467] lockdep_rcu_suspicious+0x1ea/0x280 [ 27.112121][ T467] dev_hard_start_xmit+0x2fc/0x3f0 [ 27.112131][ T467] sch_direct_xmit+0x1e0/0xa60 [ 27.112146][ T467] ? __pfx_sch_direct_xmit+0x10/0x10 [ 27.112162][ T467] __qdisc_run+0x1b9/0x3b0 [ 27.112166][ T467] ? __lock_acquire+0xb9a/0x1680 [ 27.112172][ T467] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 27.112177][ T467] ? __pfx___qdisc_run+0x10/0x10 [ 27.112186][ T467] ? tbf_enqueue+0x21e/0x7b0 [sch_tbf] [ 27.112192][ T467] ? lock_acquire+0x32/0xc0 [ 27.112195][ T467] ? __dev_xmit_skb+0x301/0x10b0 [ 27.112209][ T467] __dev_xmit_skb+0x4a5/0x10b0 [ 27.112214][ T467] ? lock_sync+0xd0/0x180 [ 27.112220][ T467] ? __pfx___dev_xmit_skb+0x10/0x10 [ 27.112227][ T467] ? lock_acquire+0x32/0xc0 [ 27.112230][ T467] ? __dev_queue_xmit+0x1f0/0x18d0 [ 27.112238][ T467] __dev_queue_xmit+0x784/0x18d0 [ 27.112252][ T467] ? __pfx___dev_queue_xmit+0x10/0x10 [ 27.112256][ T467] ? packet_parse_headers+0x231/0x9c0 [ 27.112266][ T467] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 27.112273][ T467] ? __pfx_packet_parse_headers+0x10/0x10 [ 27.112277][ T467] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 27.112283][ T467] ? dev_get_by_index+0xb2/0x190 [ 27.112294][ T467] packet_snd+0xd0c/0x19d0 [ 27.112306][ T467] ? __lock_release+0x103/0x460 [ 27.112308][ T467] ? __might_fault+0x11b/0x170 [ 27.112316][ T467] ? __pfx_packet_snd+0x10/0x10 [ 27.112318][ T467] ? trace_lock_acquire+0x14c/0x1f0 [ 27.112320][ T467] ? __might_fault+0x11b/0x170 [ 27.112327][ T467] ? lock_acquire+0x32/0xc0 [ 27.112334][ T467] ? __might_fault+0x11b/0x170 [ 27.112344][ T467] __sys_sendto+0x3c3/0x450 [ 27.112350][ T467] ? __pfx___sys_sendto+0x10/0x10 [ 27.112364][ T467] ? sock_ioctl+0x3b6/0x590 [ 27.112374][ T467] ? __pfx___up_read+0x10/0x10 [ 27.112383][ T467] ? do_user_addr_fault+0x374/0xe30 [ 27.112394][ T467] ? do_user_addr_fault+0x374/0xe30 [ 27.112401][ T467] __x64_sys_sendto+0xe0/0x1c0 [ 27.112405][ T467] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 27.112411][ T467] do_syscall_64+0xc1/0x1d0 [ 27.112420][ T467] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 27.112425][ T467] RIP: 0033:0x7f5b8854aa4a [ 27.112430][ T467] 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 [ 27.112433][ T467] RSP: 002b:00007ffeba49b828 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 27.112437][ T467] RAX: ffffffffffffffda RBX: 000000002e0519d0 RCX: 00007f5b8854aa4a [ 27.112439][ T467] RDX: 00000000000005ae RSI: 000000002e052252 RDI: 0000000000000005 [ 27.112441][ T467] RBP: 000000002e052252 R08: 00007ffeba49b830 R09: 0000000000000014 [ 27.112443][ T467] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 27.112445][ T467] R13: 00000000000005ae R14: 00007ffeba49b830 R15: 0000000000000000 [ 27.112461][ T467] [ 108.722208][ T805] Mirror/redirect action on [ 145.319088][ T982] br: port 3(veth4) entered disabled state [ 145.322017][ T982] veth4: left allmulticast mode [ 145.322321][ T982] veth4: left promiscuous mode [ 145.322757][ T982] br: port 3(veth4) entered disabled state [ 145.413601][ T984] br: port 2(veth3) entered disabled state [ 145.414267][ T984] veth3: left allmulticast mode [ 145.414472][ T984] veth3: left promiscuous mode [ 145.414793][ T984] br: port 2(veth3) entered disabled state [ 145.513686][ T986] br: port 1(veth1) entered disabled state [ 145.514760][ T986] veth1: left allmulticast mode [ 145.514980][ T986] veth1: left promiscuous mode [ 145.515347][ T986] br: port 1(veth1) entered disabled state