[ 11.435999][ T260] ip (260) used greatest stack depth: 23520 bytes left [ 13.256990][ T293] 8021q: 802.1Q VLAN Support v1.8 [ 15.975705][ T329] br0: port 1(veth1) entered blocking state [ 15.976169][ T329] br0: port 1(veth1) entered disabled state [ 15.976568][ T329] veth1: entered allmulticast mode [ 15.978602][ T329] veth1: entered promiscuous mode [ 16.064668][ T45] br0: port 1(veth1) entered blocking state [ 16.065052][ T45] br0: port 1(veth1) entered forwarding state [ 16.230248][ T332] br0: port 2(veth2) entered blocking state [ 16.230860][ T332] br0: port 2(veth2) entered disabled state [ 16.231676][ T332] veth2: entered allmulticast mode [ 16.233592][ T332] veth2: entered promiscuous mode [ 16.309947][ T137] br0: port 2(veth2) entered blocking state [ 16.310263][ T137] br0: port 2(veth2) entered forwarding state [ 23.957525][ T425] [ 23.957909][ T425] ============================= [ 23.958185][ T425] WARNING: suspicious RCU usage [ 23.958467][ T425] 6.14.0-rc6-virtme #1 Not tainted [ 23.958983][ T425] ----------------------------- [ 23.959240][ T425] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 23.959645][ T425] [ 23.959645][ T425] other info that might help us debug this: [ 23.959645][ T425] [ 23.960141][ T425] [ 23.960141][ T425] rcu_scheduler_active = 2, debug_locks = 1 [ 23.960505][ T425] 1 lock held by mausezahn/425: [ 23.960757][ T425] #0: ffffffffb275b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 23.961233][ T425] [ 23.961233][ T425] stack backtrace: [ 23.961545][ T425] CPU: 3 UID: 0 PID: 425 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 23.961553][ T425] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 23.961556][ T425] Call Trace: [ 23.961559][ T425] [ 23.961564][ T425] dump_stack_lvl+0xb0/0xd0 [ 23.961577][ T425] lockdep_rcu_suspicious+0x1ea/0x280 [ 23.961597][ T425] dev_hard_start_xmit+0x2fc/0x3f0 [ 23.961619][ T425] __dev_queue_xmit+0xfaf/0x18d0 [ 23.961638][ T425] ? __pfx_vlan_parse_protocol+0x10/0x10 [8021q] [ 23.961662][ T425] ? __pfx___dev_queue_xmit+0x10/0x10 [ 23.961670][ T425] ? packet_parse_headers+0x231/0x9c0 [ 23.961687][ T425] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 23.961697][ T425] ? __pfx_packet_parse_headers+0x10/0x10 [ 23.961705][ T425] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 23.961715][ T425] ? dev_get_by_index+0xb2/0x190 [ 23.961732][ T425] packet_snd+0xd0c/0x19d0 [ 23.961754][ T425] ? __lock_release+0x103/0x460 [ 23.961759][ T425] ? __might_fault+0x11b/0x170 [ 23.961770][ T425] ? __pfx_packet_snd+0x10/0x10 [ 23.961773][ T425] ? trace_lock_acquire+0x14c/0x1f0 [ 23.961777][ T425] ? __might_fault+0x11b/0x170 [ 23.961788][ T425] ? lock_acquire+0x32/0xc0 [ 23.961798][ T425] ? __might_fault+0x11b/0x170 [ 23.961817][ T425] __sys_sendto+0x3c3/0x450 [ 23.961828][ T425] ? __pfx___sys_sendto+0x10/0x10 [ 23.961854][ T425] ? sock_ioctl+0x3b6/0x590 [ 23.961872][ T425] ? __pfx___up_read+0x10/0x10 [ 23.961885][ T425] ? do_user_addr_fault+0x374/0xe30 [ 23.961903][ T425] ? do_user_addr_fault+0x374/0xe30 [ 23.961916][ T425] __x64_sys_sendto+0xe0/0x1c0 [ 23.961922][ T425] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 23.961931][ T425] do_syscall_64+0xc1/0x1d0 [ 23.961943][ T425] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.961952][ T425] RIP: 0033:0x7fdc95824a4a [ 23.961958][ T425] 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 [ 23.961963][ T425] RSP: 002b:00007ffc8824cf08 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 23.961969][ T425] RAX: ffffffffffffffda RBX: 000000001aaec9d0 RCX: 00007fdc95824a4a [ 23.961973][ T425] RDX: 0000000000000042 RSI: 000000001aaecca2 RDI: 0000000000000005 [ 23.961976][ T425] RBP: 000000001aaecca2 R08: 00007ffc8824cf10 R09: 0000000000000014 [ 23.961979][ T425] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 23.961982][ T425] R13: 0000000000000042 R14: 00007ffc8824cf10 R15: 0000000000000000 [ 23.962011][ T425] [ 86.025038][ T2116] br0: port 2(veth2) entered disabled state [ 86.110027][ T2117] veth2: left allmulticast mode [ 86.110914][ T2117] veth2: left promiscuous mode [ 86.111296][ T2117] br0: port 2(veth2) entered disabled state [ 86.187859][ T2118] br0: port 1(veth1) entered disabled state [ 86.295952][ T2119] veth1: left allmulticast mode [ 86.296451][ T2119] veth1: left promiscuous mode [ 86.296985][ T2119] br0: port 1(veth1) entered disabled state [ 87.048726][ T2137] br0: port 1(veth1) entered blocking state [ 87.049080][ T2137] br0: port 1(veth1) entered disabled state [ 87.049417][ T2137] veth1: entered allmulticast mode [ 87.051320][ T2137] veth1: entered promiscuous mode [ 87.144502][ T69] br0: port 1(veth1) entered blocking state [ 87.144857][ T69] br0: port 1(veth1) entered forwarding state [ 87.444317][ T2142] br0: port 2(veth2) entered blocking state [ 87.444633][ T2142] br0: port 2(veth2) entered disabled state [ 87.444920][ T2142] veth2: entered allmulticast mode [ 87.446817][ T2142] veth2: entered promiscuous mode [ 87.536078][ T137] br0: port 2(veth2) entered blocking state [ 87.536390][ T137] br0: port 2(veth2) entered forwarding state [ 155.816821][ T3934] br0: port 2(veth2) entered disabled state [ 155.882273][ T3935] veth2: left allmulticast mode [ 155.882508][ T3935] veth2: left promiscuous mode [ 155.882814][ T3935] br0: port 2(veth2) entered disabled state [ 155.969705][ T3936] br0: port 1(veth1) entered disabled state [ 156.030661][ T3937] veth1: left allmulticast mode [ 156.030928][ T3937] veth1: left promiscuous mode [ 156.031270][ T3937] br0: port 1(veth1) entered disabled state [ 156.722531][ T3955] br0: port 1(veth1) entered blocking state [ 156.722808][ T3955] br0: port 1(veth1) entered disabled state [ 156.723070][ T3955] veth1: entered allmulticast mode [ 156.725895][ T3955] veth1: entered promiscuous mode [ 156.794899][ T69] br0: port 1(veth1) entered blocking state [ 156.795404][ T69] br0: port 1(veth1) entered forwarding state [ 157.099494][ T3960] br0: port 2(veth2) entered blocking state [ 157.099768][ T3960] br0: port 2(veth2) entered disabled state [ 157.100031][ T3960] veth2: entered allmulticast mode [ 157.102419][ T3960] veth2: entered promiscuous mode [ 157.192535][ T137] br0: port 2(veth2) entered blocking state [ 157.192838][ T137] br0: port 2(veth2) entered forwarding state [ 301.630031][ T7809] br0: port 2(veth2) entered disabled state [ 301.718772][ T7810] veth2: left allmulticast mode [ 301.719035][ T7810] veth2: left promiscuous mode [ 301.719712][ T7810] br0: port 2(veth2) entered disabled state [ 301.787272][ T7811] br0: port 1(veth1) entered disabled state [ 301.887167][ T7812] veth1: left allmulticast mode [ 301.887558][ T7812] veth1: left promiscuous mode [ 301.888075][ T7812] br0: port 1(veth1) entered disabled state