[ 10.643478][ T251] ip (251) used greatest stack depth: 24256 bytes left [ 14.716749][ T318] br0: port 1(veth1) entered blocking state [ 14.717200][ T318] br0: port 1(veth1) entered disabled state [ 14.718190][ T318] veth1: entered allmulticast mode [ 14.720168][ T318] veth1: entered promiscuous mode [ 14.800597][ T320] br0: port 2(veth2) entered blocking state [ 14.800919][ T320] br0: port 2(veth2) entered disabled state [ 14.801319][ T320] veth2: entered allmulticast mode [ 14.803378][ T320] veth2: entered promiscuous mode [ 14.872123][ T321] br0: port 3(veth4) entered blocking state [ 14.872677][ T321] br0: port 3(veth4) entered disabled state [ 14.872940][ T321] veth4: entered allmulticast mode [ 14.874771][ T321] veth4: entered promiscuous mode [ 15.446852][ T41] br0: port 1(veth1) entered blocking state [ 15.447448][ T41] br0: port 1(veth1) entered forwarding state [ 15.519585][ T41] br0: port 2(veth2) entered blocking state [ 15.520054][ T41] br0: port 2(veth2) entered forwarding state [ 15.602393][ T46] br0: port 3(veth4) entered blocking state [ 15.602884][ T46] br0: port 3(veth4) entered forwarding state [ 30.945702][ T389] veth3: entered promiscuous mode [ 31.391838][ T395] GACT probability NOT on [ 31.412187][ T392] tc (392) used greatest stack depth: 23792 bytes left [ 31.523355][ T396] [ 31.523603][ T396] ============================= [ 31.523869][ T396] WARNING: suspicious RCU usage [ 31.524113][ T396] 6.14.0-rc6-virtme #1 Not tainted [ 31.524548][ T396] ----------------------------- [ 31.524768][ T396] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 31.525172][ T396] [ 31.525172][ T396] other info that might help us debug this: [ 31.525172][ T396] [ 31.525654][ T396] [ 31.525654][ T396] rcu_scheduler_active = 2, debug_locks = 1 [ 31.526002][ T396] 1 lock held by mausezahn/396: [ 31.526265][ T396] #0: ffffffffb535b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 31.526707][ T396] [ 31.526707][ T396] stack backtrace: [ 31.527001][ T396] CPU: 3 UID: 0 PID: 396 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 31.527007][ T396] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 31.527010][ T396] Call Trace: [ 31.527013][ T396] [ 31.527017][ T396] dump_stack_lvl+0xb0/0xd0 [ 31.527028][ T396] lockdep_rcu_suspicious+0x1ea/0x280 [ 31.527046][ T396] dev_hard_start_xmit+0x2fc/0x3f0 [ 31.527066][ T396] __dev_queue_xmit+0xfaf/0x18d0 [ 31.527095][ T396] ? __pfx___dev_queue_xmit+0x10/0x10 [ 31.527102][ T396] ? packet_parse_headers+0x231/0x9c0 [ 31.527119][ T396] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 31.527128][ T396] ? __pfx_packet_parse_headers+0x10/0x10 [ 31.527137][ T396] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 31.527147][ T396] ? dev_get_by_index+0xb2/0x190 [ 31.527167][ T396] packet_snd+0xd0c/0x19d0 [ 31.527179][ T396] ? __lock_release+0x103/0x460 [ 31.527182][ T396] ? __might_fault+0x11b/0x170 [ 31.527188][ T396] ? __pfx_packet_snd+0x10/0x10 [ 31.527191][ T396] ? trace_lock_acquire+0x14c/0x1f0 [ 31.527193][ T396] ? __might_fault+0x11b/0x170 [ 31.527200][ T396] ? lock_acquire+0x32/0xc0 [ 31.527206][ T396] ? __might_fault+0x11b/0x170 [ 31.527217][ T396] __sys_sendto+0x3c3/0x450 [ 31.527223][ T396] ? __pfx___sys_sendto+0x10/0x10 [ 31.527237][ T396] ? sock_ioctl+0x3b6/0x590 [ 31.527249][ T396] ? __pfx___up_read+0x10/0x10 [ 31.527256][ T396] ? do_user_addr_fault+0x374/0xe30 [ 31.527267][ T396] ? do_user_addr_fault+0x374/0xe30 [ 31.527273][ T396] __x64_sys_sendto+0xe0/0x1c0 [ 31.527277][ T396] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 31.527282][ T396] do_syscall_64+0xc1/0x1d0 [ 31.527289][ T396] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 31.527294][ T396] RIP: 0033:0x7fdacc76ea4a [ 31.527298][ T396] 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 [ 31.527301][ T396] RSP: 002b:00007fff7286ebc8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 31.527304][ T396] RAX: ffffffffffffffda RBX: 0000000038cca9d0 RCX: 00007fdacc76ea4a [ 31.527306][ T396] RDX: 0000000000000062 RSI: 0000000038cca5c2 RDI: 0000000000000005 [ 31.527308][ T396] RBP: 0000000038cca5c2 R08: 00007fff7286ebd0 R09: 0000000000000014 [ 31.527309][ T396] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 31.527311][ T396] R13: 0000000000000062 R14: 00007fff7286ebd0 R15: 0000000000000000 [ 31.527327][ T396] [ 33.013024][ T402] veth3: left promiscuous mode [ 33.075535][ T403] veth3: entered promiscuous mode [ 34.968589][ T412] veth3: left promiscuous mode [ 35.100292][ T420] br0: port 3(veth4) entered disabled state [ 35.172958][ T421] br0: port 2(veth2) entered disabled state [ 35.260768][ T422] br0: port 1(veth1) entered disabled state [ 35.337542][ T423] veth4: left allmulticast mode [ 35.337778][ T423] veth4: left promiscuous mode [ 35.338103][ T423] br0: port 3(veth4) entered disabled state [ 35.339947][ T423] veth2: left allmulticast mode [ 35.340151][ T423] veth2: left promiscuous mode [ 35.340470][ T423] br0: port 2(veth2) entered disabled state [ 35.341814][ T423] veth1: left allmulticast mode [ 35.342008][ T423] veth1: left promiscuous mode [ 35.342319][ T423] br0: port 1(veth1) entered disabled state [ 35.410500][ T423] ip (423) used greatest stack depth: 23552 bytes left