[ 11.974746][ T250] ip (250) used greatest stack depth: 23120 bytes left [ 14.505749][ T292] 8021q: 802.1Q VLAN Support v1.8 [ 17.298631][ T328] br0: port 1(veth1) entered blocking state [ 17.299144][ T328] br0: port 1(veth1) entered disabled state [ 17.300199][ T328] veth1: entered allmulticast mode [ 17.302216][ T328] veth1: entered promiscuous mode [ 17.404428][ T46] br0: port 1(veth1) entered blocking state [ 17.404986][ T46] br0: port 1(veth1) entered forwarding state [ 17.568144][ T331] br0: port 2(veth2) entered blocking state [ 17.568433][ T331] br0: port 2(veth2) entered disabled state [ 17.568697][ T331] veth2: entered allmulticast mode [ 17.570611][ T331] veth2: entered promiscuous mode [ 17.663958][ T46] br0: port 2(veth2) entered blocking state [ 17.664434][ T46] br0: port 2(veth2) entered forwarding state [ 25.744884][ T423] [ 25.745277][ T423] ============================= [ 25.745688][ T423] WARNING: suspicious RCU usage [ 25.745973][ T423] 6.14.0-rc6-virtme #1 Not tainted [ 25.746417][ T423] ----------------------------- [ 25.746688][ T423] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 25.747094][ T423] [ 25.747094][ T423] other info that might help us debug this: [ 25.747094][ T423] [ 25.747631][ T423] [ 25.747631][ T423] rcu_scheduler_active = 2, debug_locks = 1 [ 25.748044][ T423] 1 lock held by mausezahn/423: [ 25.748290][ T423] #0: ffffffffa355b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 25.748730][ T423] [ 25.748730][ T423] stack backtrace: [ 25.748993][ T423] CPU: 3 UID: 0 PID: 423 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 25.748998][ T423] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 25.749000][ T423] Call Trace: [ 25.749002][ T423] [ 25.749005][ T423] dump_stack_lvl+0xb0/0xd0 [ 25.749012][ T423] lockdep_rcu_suspicious+0x1ea/0x280 [ 25.749023][ T423] dev_hard_start_xmit+0x2fc/0x3f0 [ 25.749034][ T423] __dev_queue_xmit+0xfaf/0x18d0 [ 25.749045][ T423] ? __pfx_vlan_parse_protocol+0x10/0x10 [8021q] [ 25.749057][ T423] ? __pfx___dev_queue_xmit+0x10/0x10 [ 25.749062][ T423] ? packet_parse_headers+0x231/0x9c0 [ 25.749070][ T423] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 25.749076][ T423] ? __pfx_packet_parse_headers+0x10/0x10 [ 25.749081][ T423] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 25.749086][ T423] ? dev_get_by_index+0xb2/0x190 [ 25.749098][ T423] packet_snd+0xd0c/0x19d0 [ 25.749109][ T423] ? __lock_release+0x103/0x460 [ 25.749112][ T423] ? __might_fault+0x11b/0x170 [ 25.749119][ T423] ? __pfx_packet_snd+0x10/0x10 [ 25.749121][ T423] ? trace_lock_acquire+0x14c/0x1f0 [ 25.749124][ T423] ? __might_fault+0x11b/0x170 [ 25.749130][ T423] ? lock_acquire+0x32/0xc0 [ 25.749138][ T423] ? __might_fault+0x11b/0x170 [ 25.749153][ T423] __sys_sendto+0x3c3/0x450 [ 25.749161][ T423] ? __pfx___sys_sendto+0x10/0x10 [ 25.749182][ T423] ? sock_ioctl+0x3b6/0x590 [ 25.749197][ T423] ? __pfx___up_read+0x10/0x10 [ 25.749209][ T423] ? do_user_addr_fault+0x374/0xe30 [ 25.749221][ T423] ? do_user_addr_fault+0x374/0xe30 [ 25.749228][ T423] __x64_sys_sendto+0xe0/0x1c0 [ 25.749232][ T423] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 25.749238][ T423] do_syscall_64+0xc1/0x1d0 [ 25.749245][ T423] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 25.749251][ T423] RIP: 0033:0x7fce6845fa4a [ 25.749256][ T423] 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 [ 25.749259][ T423] RSP: 002b:00007ffcdd828a08 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 25.749263][ T423] RAX: ffffffffffffffda RBX: 0000000021ff39d0 RCX: 00007fce6845fa4a [ 25.749265][ T423] RDX: 0000000000000042 RSI: 0000000021ff3ca2 RDI: 0000000000000005 [ 25.749267][ T423] RBP: 0000000021ff3ca2 R08: 00007ffcdd828a10 R09: 0000000000000014 [ 25.749269][ T423] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 25.749270][ T423] R13: 0000000000000042 R14: 00007ffcdd828a10 R15: 0000000000000000 [ 25.749292][ T423] [ 92.044556][ T2114] br0: port 2(veth2) entered disabled state [ 92.141092][ T2115] veth2: left allmulticast mode [ 92.141583][ T2115] veth2: left promiscuous mode [ 92.141949][ T2115] br0: port 2(veth2) entered disabled state [ 92.246076][ T2116] br0: port 1(veth1) entered disabled state [ 92.336395][ T2117] veth1: left allmulticast mode [ 92.336686][ T2117] veth1: left promiscuous mode [ 92.337022][ T2117] br0: port 1(veth1) entered disabled state [ 93.197963][ T2135] br0: port 1(veth1) entered blocking state [ 93.199061][ T2135] br0: port 1(veth1) entered disabled state [ 93.199361][ T2135] veth1: entered allmulticast mode [ 93.201327][ T2135] veth1: entered promiscuous mode [ 93.297672][ T150] br0: port 1(veth1) entered blocking state [ 93.298010][ T150] br0: port 1(veth1) entered forwarding state [ 93.614334][ T2140] br0: port 2(veth2) entered blocking state [ 93.614692][ T2140] br0: port 2(veth2) entered disabled state [ 93.614994][ T2140] veth2: entered allmulticast mode [ 93.617003][ T2140] veth2: entered promiscuous mode [ 93.695265][ T41] br0: port 2(veth2) entered blocking state [ 93.695572][ T41] br0: port 2(veth2) entered forwarding state [ 167.830432][ T3932] br0: port 2(veth2) entered disabled state [ 167.901916][ T3933] veth2: left allmulticast mode [ 167.902243][ T3933] veth2: left promiscuous mode [ 167.902618][ T3933] br0: port 2(veth2) entered disabled state [ 167.993358][ T3934] br0: port 1(veth1) entered disabled state [ 168.060394][ T3936] veth1: left allmulticast mode [ 168.060704][ T3936] veth1: left promiscuous mode [ 168.061068][ T3936] br0: port 1(veth1) entered disabled state [ 168.903198][ T3954] br0: port 1(veth1) entered blocking state [ 168.903491][ T3954] br0: port 1(veth1) entered disabled state [ 168.903781][ T3954] veth1: entered allmulticast mode [ 168.906875][ T3954] veth1: entered promiscuous mode [ 169.013493][ T46] br0: port 1(veth1) entered blocking state [ 169.013782][ T46] br0: port 1(veth1) entered forwarding state [ 169.352419][ T3959] br0: port 2(veth2) entered blocking state [ 169.352906][ T3959] br0: port 2(veth2) entered disabled state [ 169.353430][ T3959] veth2: entered allmulticast mode [ 169.356834][ T3959] veth2: entered promiscuous mode [ 169.443064][ T41] br0: port 2(veth2) entered blocking state [ 169.443426][ T41] br0: port 2(veth2) entered forwarding state [ 320.634308][ T7808] br0: port 2(veth2) entered disabled state [ 320.724658][ T7809] veth2: left allmulticast mode [ 320.725013][ T7809] veth2: left promiscuous mode [ 320.725639][ T7809] br0: port 2(veth2) entered disabled state [ 320.829214][ T7810] br0: port 1(veth1) entered disabled state [ 320.916133][ T7811] veth1: left allmulticast mode [ 320.916399][ T7811] veth1: left promiscuous mode [ 320.916720][ T7811] br0: port 1(veth1) entered disabled state