[ 10.931680][ T261] ip (261) used greatest stack depth: 24464 bytes left [ 17.006763][ T356] 8021q: 802.1Q VLAN Support v1.8 [ 17.423462][ T362] gre: GRE over IPv4 demultiplexor driver [ 17.467278][ T362] ip6_gre: GRE over IPv6 tunneling driver [ 17.737910][ T367] ip (367) used greatest stack depth: 24304 bytes left [ 27.402282][ T444] GACT probability NOT on [ 27.822119][ T447] [ 27.822422][ T447] ============================= [ 27.822605][ T447] WARNING: suspicious RCU usage [ 27.822941][ T447] 6.14.0-rc6-virtme #1 Not tainted [ 27.823112][ T447] ----------------------------- [ 27.823271][ T447] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 27.823541][ T447] [ 27.823541][ T447] other info that might help us debug this: [ 27.823541][ T447] [ 27.823866][ T447] [ 27.823866][ T447] rcu_scheduler_active = 2, debug_locks = 1 [ 27.824101][ T447] 1 lock held by mausezahn/447: [ 27.824262][ T447] #0: ffffffffad55b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 27.824546][ T447] [ 27.824546][ T447] stack backtrace: [ 27.824752][ T447] CPU: 0 UID: 0 PID: 447 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 27.824756][ T447] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 27.824758][ T447] Call Trace: [ 27.824760][ T447] [ 27.824763][ T447] dump_stack_lvl+0xb0/0xd0 [ 27.824772][ T447] lockdep_rcu_suspicious+0x1ea/0x280 [ 27.824784][ T447] dev_hard_start_xmit+0x2fc/0x3f0 [ 27.824795][ T447] __dev_queue_xmit+0xfaf/0x18d0 [ 27.824810][ T447] ? __pfx___dev_queue_xmit+0x10/0x10 [ 27.824814][ T447] ? packet_parse_headers+0x231/0x9c0 [ 27.824823][ T447] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 27.824831][ T447] ? __pfx_packet_parse_headers+0x10/0x10 [ 27.824835][ T447] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 27.824841][ T447] ? dev_get_by_index+0xb2/0x190 [ 27.824853][ T447] packet_snd+0xd0c/0x19d0 [ 27.824865][ T447] ? __lock_release+0x103/0x460 [ 27.824869][ T447] ? __might_fault+0x11b/0x170 [ 27.824877][ T447] ? __pfx_packet_snd+0x10/0x10 [ 27.824879][ T447] ? trace_lock_acquire+0x14c/0x1f0 [ 27.824882][ T447] ? __might_fault+0x11b/0x170 [ 27.824889][ T447] ? lock_acquire+0x32/0xc0 [ 27.824895][ T447] ? __might_fault+0x11b/0x170 [ 27.824906][ T447] __sys_sendto+0x3c3/0x450 [ 27.824913][ T447] ? __pfx___sys_sendto+0x10/0x10 [ 27.824928][ T447] ? sock_ioctl+0x3b6/0x590 [ 27.824939][ T447] ? __pfx___up_read+0x10/0x10 [ 27.824948][ T447] ? do_user_addr_fault+0x374/0xe30 [ 27.824959][ T447] ? do_user_addr_fault+0x374/0xe30 [ 27.824969][ T447] __x64_sys_sendto+0xe0/0x1c0 [ 27.824973][ T447] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 27.824978][ T447] do_syscall_64+0xc1/0x1d0 [ 27.824987][ T447] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 27.824992][ T447] RIP: 0033:0x7f514c5c4a4a [ 27.824998][ T447] 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 [ 27.825001][ T447] RSP: 002b:00007fffd5824e58 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 27.825005][ T447] RAX: ffffffffffffffda RBX: 00000000249d49d0 RCX: 00007f514c5c4a4a [ 27.825007][ T447] RDX: 0000000000000062 RSI: 00000000249d45c2 RDI: 0000000000000005 [ 27.825009][ T447] RBP: 00000000249d45c2 R08: 00007fffd5824e60 R09: 0000000000000014 [ 27.825011][ T447] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 27.825013][ T447] R13: 0000000000000062 R14: 00007fffd5824e60 R15: 0000000000000000 [ 27.825029][ T447]