[ 10.483986][ T250] ip (250) used greatest stack depth: 23424 bytes left [ 16.697889][ T355] 8021q: 802.1Q VLAN Support v1.8 [ 17.102989][ T361] gre: GRE over IPv4 demultiplexor driver [ 17.156812][ T361] ip6_gre: GRE over IPv6 tunneling driver [ 26.874555][ T443] GACT probability NOT on [ 27.247924][ T446] [ 27.248146][ T446] ============================= [ 27.248348][ T446] WARNING: suspicious RCU usage [ 27.248524][ T446] 6.14.0-rc6-virtme #1 Not tainted [ 27.248804][ T446] ----------------------------- [ 27.248951][ T446] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 27.249222][ T446] [ 27.249222][ T446] other info that might help us debug this: [ 27.249222][ T446] [ 27.249516][ T446] [ 27.249516][ T446] rcu_scheduler_active = 2, debug_locks = 1 [ 27.249736][ T446] 1 lock held by mausezahn/446: [ 27.249887][ T446] #0: ffffffffa7f5b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 27.250184][ T446] [ 27.250184][ T446] stack backtrace: [ 27.250375][ T446] CPU: 0 UID: 0 PID: 446 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 27.250379][ T446] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 27.250381][ T446] Call Trace: [ 27.250382][ T446] [ 27.250385][ T446] dump_stack_lvl+0xb0/0xd0 [ 27.250392][ T446] lockdep_rcu_suspicious+0x1ea/0x280 [ 27.250402][ T446] dev_hard_start_xmit+0x2fc/0x3f0 [ 27.250412][ T446] __dev_queue_xmit+0xfaf/0x18d0 [ 27.250427][ T446] ? __pfx___dev_queue_xmit+0x10/0x10 [ 27.250431][ T446] ? packet_parse_headers+0x231/0x9c0 [ 27.250439][ T446] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 27.250445][ T446] ? __pfx_packet_parse_headers+0x10/0x10 [ 27.250450][ T446] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 27.250455][ T446] ? dev_get_by_index+0xb2/0x190 [ 27.250466][ T446] packet_snd+0xd0c/0x19d0 [ 27.250477][ T446] ? __lock_release+0x103/0x460 [ 27.250481][ T446] ? __might_fault+0x11b/0x170 [ 27.250488][ T446] ? __pfx_packet_snd+0x10/0x10 [ 27.250491][ T446] ? trace_lock_acquire+0x14c/0x1f0 [ 27.250493][ T446] ? __might_fault+0x11b/0x170 [ 27.250500][ T446] ? lock_acquire+0x32/0xc0 [ 27.250506][ T446] ? __might_fault+0x11b/0x170 [ 27.250517][ T446] __sys_sendto+0x3c3/0x450 [ 27.250523][ T446] ? __pfx___sys_sendto+0x10/0x10 [ 27.250537][ T446] ? sock_ioctl+0x3b6/0x590 [ 27.250546][ T446] ? __pfx___up_read+0x10/0x10 [ 27.250555][ T446] ? do_user_addr_fault+0x374/0xe30 [ 27.250565][ T446] ? do_user_addr_fault+0x374/0xe30 [ 27.250572][ T446] __x64_sys_sendto+0xe0/0x1c0 [ 27.250575][ T446] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 27.250581][ T446] do_syscall_64+0xc1/0x1d0 [ 27.250589][ T446] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 27.250594][ T446] RIP: 0033:0x7fb01b761a4a [ 27.250598][ T446] 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 [ 27.250601][ T446] RSP: 002b:00007ffc39417b28 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 27.250604][ T446] RAX: ffffffffffffffda RBX: 000000000c2119d0 RCX: 00007fb01b761a4a [ 27.250607][ T446] RDX: 0000000000000062 RSI: 000000000c2115c2 RDI: 0000000000000005 [ 27.250609][ T446] RBP: 000000000c2115c2 R08: 00007ffc39417b30 R09: 0000000000000014 [ 27.250610][ T446] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 27.250612][ T446] R13: 0000000000000062 R14: 00007ffc39417b30 R15: 0000000000000000 [ 27.250628][ T446]