[ 17.299910][ T355] 8021q: 802.1Q VLAN Support v1.8 [ 17.739116][ T361] gre: GRE over IPv4 demultiplexor driver [ 17.785932][ T361] ip6_gre: GRE over IPv6 tunneling driver [ 17.825999][ T360] ip (360) used greatest stack depth: 24048 bytes left [ 27.644430][ T445] GACT probability NOT on [ 28.019697][ T448] [ 28.019961][ T448] ============================= [ 28.020140][ T448] WARNING: suspicious RCU usage [ 28.020498][ T448] 6.14.0-rc6-virtme #1 Not tainted [ 28.020692][ T448] ----------------------------- [ 28.020857][ T448] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 28.021164][ T448] [ 28.021164][ T448] other info that might help us debug this: [ 28.021164][ T448] [ 28.021508][ T448] [ 28.021508][ T448] rcu_scheduler_active = 2, debug_locks = 1 [ 28.021750][ T448] 1 lock held by mausezahn/448: [ 28.021926][ T448] #0: ffffffff8b75b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 28.022244][ T448] [ 28.022244][ T448] stack backtrace: [ 28.022451][ T448] CPU: 0 UID: 0 PID: 448 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 28.022455][ T448] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 28.022457][ T448] Call Trace: [ 28.022459][ T448] [ 28.022461][ T448] dump_stack_lvl+0xb0/0xd0 [ 28.022468][ T448] lockdep_rcu_suspicious+0x1ea/0x280 [ 28.022479][ T448] dev_hard_start_xmit+0x2fc/0x3f0 [ 28.022489][ T448] __dev_queue_xmit+0xfaf/0x18d0 [ 28.022503][ T448] ? __pfx___dev_queue_xmit+0x10/0x10 [ 28.022507][ T448] ? packet_parse_headers+0x231/0x9c0 [ 28.022516][ T448] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 28.022523][ T448] ? __pfx_packet_parse_headers+0x10/0x10 [ 28.022527][ T448] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 28.022533][ T448] ? dev_get_by_index+0xb2/0x190 [ 28.022545][ T448] packet_snd+0xd0c/0x19d0 [ 28.022556][ T448] ? __lock_release+0x103/0x460 [ 28.022560][ T448] ? __might_fault+0x11b/0x170 [ 28.022567][ T448] ? __pfx_packet_snd+0x10/0x10 [ 28.022569][ T448] ? trace_lock_acquire+0x14c/0x1f0 [ 28.022571][ T448] ? __might_fault+0x11b/0x170 [ 28.022578][ T448] ? lock_acquire+0x32/0xc0 [ 28.022584][ T448] ? __might_fault+0x11b/0x170 [ 28.022595][ T448] __sys_sendto+0x3c3/0x450 [ 28.022601][ T448] ? __pfx___sys_sendto+0x10/0x10 [ 28.022616][ T448] ? sock_ioctl+0x3b6/0x590 [ 28.022625][ T448] ? __pfx___up_read+0x10/0x10 [ 28.022634][ T448] ? do_user_addr_fault+0x374/0xe30 [ 28.022644][ T448] ? do_user_addr_fault+0x374/0xe30 [ 28.022651][ T448] __x64_sys_sendto+0xe0/0x1c0 [ 28.022655][ T448] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 28.022661][ T448] do_syscall_64+0xc1/0x1d0 [ 28.022668][ T448] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 28.022673][ T448] RIP: 0033:0x7f71e6454a4a [ 28.022677][ T448] 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 [ 28.022680][ T448] RSP: 002b:00007ffcfe90fbd8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 28.022684][ T448] RAX: ffffffffffffffda RBX: 0000000022a859d0 RCX: 00007f71e6454a4a [ 28.022686][ T448] RDX: 0000000000000062 RSI: 0000000022a855c2 RDI: 0000000000000005 [ 28.022687][ T448] RBP: 0000000022a855c2 R08: 00007ffcfe90fbe0 R09: 0000000000000014 [ 28.022690][ T448] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 28.022691][ T448] R13: 0000000000000062 R14: 00007ffcfe90fbe0 R15: 0000000000000000 [ 28.022707][ T448]