[ 10.253440][ T248] ip (248) used greatest stack depth: 23992 bytes left [ 16.435646][ T357] 8021q: 802.1Q VLAN Support v1.8 [ 16.834994][ T363] gre: GRE over IPv4 demultiplexor driver [ 16.886712][ T363] ip6_gre: GRE over IPv6 tunneling driver [ 26.411366][ T447] GACT probability NOT on [ 26.774042][ T450] [ 26.774333][ T450] ============================= [ 26.774533][ T450] WARNING: suspicious RCU usage [ 26.774687][ T450] 6.14.0-rc6-virtme #1 Not tainted [ 26.774998][ T450] ----------------------------- [ 26.775164][ T450] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 26.775431][ T450] [ 26.775431][ T450] other info that might help us debug this: [ 26.775431][ T450] [ 26.775729][ T450] [ 26.775729][ T450] rcu_scheduler_active = 2, debug_locks = 1 [ 26.775959][ T450] 1 lock held by mausezahn/450: [ 26.776121][ T450] #0: ffffffff8b35b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 26.776404][ T450] [ 26.776404][ T450] stack backtrace: [ 26.776588][ T450] CPU: 3 UID: 0 PID: 450 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 26.776593][ T450] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 26.776595][ T450] Call Trace: [ 26.776597][ T450] [ 26.776599][ T450] dump_stack_lvl+0xb0/0xd0 [ 26.776607][ T450] lockdep_rcu_suspicious+0x1ea/0x280 [ 26.776617][ T450] dev_hard_start_xmit+0x2fc/0x3f0 [ 26.776627][ T450] __dev_queue_xmit+0xfaf/0x18d0 [ 26.776641][ T450] ? __pfx___dev_queue_xmit+0x10/0x10 [ 26.776646][ T450] ? packet_parse_headers+0x231/0x9c0 [ 26.776654][ T450] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 26.776660][ T450] ? __pfx_packet_parse_headers+0x10/0x10 [ 26.776665][ T450] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 26.776671][ T450] ? dev_get_by_index+0xb2/0x190 [ 26.776682][ T450] packet_snd+0xd0c/0x19d0 [ 26.776693][ T450] ? __lock_release+0x103/0x460 [ 26.776697][ T450] ? __might_fault+0x11b/0x170 [ 26.776704][ T450] ? __pfx_packet_snd+0x10/0x10 [ 26.776706][ T450] ? trace_lock_acquire+0x14c/0x1f0 [ 26.776708][ T450] ? __might_fault+0x11b/0x170 [ 26.776715][ T450] ? lock_acquire+0x32/0xc0 [ 26.776722][ T450] ? __might_fault+0x11b/0x170 [ 26.776732][ T450] __sys_sendto+0x3c3/0x450 [ 26.776738][ T450] ? __pfx___sys_sendto+0x10/0x10 [ 26.776753][ T450] ? sock_ioctl+0x3b6/0x590 [ 26.776762][ T450] ? __pfx___up_read+0x10/0x10 [ 26.776771][ T450] ? do_user_addr_fault+0x374/0xe30 [ 26.776782][ T450] ? do_user_addr_fault+0x374/0xe30 [ 26.776788][ T450] __x64_sys_sendto+0xe0/0x1c0 [ 26.776792][ T450] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 26.776798][ T450] do_syscall_64+0xc1/0x1d0 [ 26.776805][ T450] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 26.776810][ T450] RIP: 0033:0x7f67b09d8a4a [ 26.776815][ T450] 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 [ 26.776817][ T450] RSP: 002b:00007ffceae5f7c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 26.776821][ T450] RAX: ffffffffffffffda RBX: 00000000175dd9d0 RCX: 00007f67b09d8a4a [ 26.776823][ T450] RDX: 0000000000000062 RSI: 00000000175dd5c2 RDI: 0000000000000005 [ 26.776825][ T450] RBP: 00000000175dd5c2 R08: 00007ffceae5f7d0 R09: 0000000000000014 [ 26.776827][ T450] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 26.776828][ T450] R13: 0000000000000062 R14: 00007ffceae5f7d0 R15: 0000000000000000 [ 26.776844][ T450]