[ 16.017264][ T338] 8021q: 802.1Q VLAN Support v1.8 [ 16.366771][ T343] gre: GRE over IPv4 demultiplexor driver [ 16.404140][ T343] ip6_gre: GRE over IPv6 tunneling driver [ 26.003316][ T418] GACT probability NOT on [ 26.429095][ T421] [ 26.429387][ T421] ============================= [ 26.429739][ T421] WARNING: suspicious RCU usage [ 26.429911][ T421] 6.14.0-rc6-virtme #1 Not tainted [ 26.430080][ T421] ----------------------------- [ 26.430289][ T421] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 26.430574][ T421] [ 26.430574][ T421] other info that might help us debug this: [ 26.430574][ T421] [ 26.430893][ T421] [ 26.430893][ T421] rcu_scheduler_active = 2, debug_locks = 1 [ 26.431148][ T421] 1 lock held by mausezahn/421: [ 26.431313][ T421] #0: ffffffff8dd5b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 26.431623][ T421] [ 26.431623][ T421] stack backtrace: [ 26.431826][ T421] CPU: 1 UID: 0 PID: 421 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 26.431831][ T421] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 26.431833][ T421] Call Trace: [ 26.431835][ T421] [ 26.431838][ T421] dump_stack_lvl+0xb0/0xd0 [ 26.431847][ T421] lockdep_rcu_suspicious+0x1ea/0x280 [ 26.431860][ T421] dev_hard_start_xmit+0x2fc/0x3f0 [ 26.431870][ T421] __dev_queue_xmit+0xfaf/0x18d0 [ 26.431884][ T421] ? __pfx___dev_queue_xmit+0x10/0x10 [ 26.431888][ T421] ? packet_parse_headers+0x231/0x9c0 [ 26.431897][ T421] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 26.431905][ T421] ? __pfx_packet_parse_headers+0x10/0x10 [ 26.431909][ T421] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 26.431915][ T421] ? dev_get_by_index+0xb2/0x190 [ 26.431928][ T421] packet_snd+0xd0c/0x19d0 [ 26.431939][ T421] ? __lock_release+0x103/0x460 [ 26.431943][ T421] ? __might_fault+0x11b/0x170 [ 26.431952][ T421] ? __pfx_packet_snd+0x10/0x10 [ 26.431954][ T421] ? trace_lock_acquire+0x14c/0x1f0 [ 26.431956][ T421] ? __might_fault+0x11b/0x170 [ 26.431963][ T421] ? lock_acquire+0x32/0xc0 [ 26.431969][ T421] ? __might_fault+0x11b/0x170 [ 26.431980][ T421] __sys_sendto+0x3c3/0x450 [ 26.431987][ T421] ? __pfx___sys_sendto+0x10/0x10 [ 26.432001][ T421] ? sock_ioctl+0x3b6/0x590 [ 26.432012][ T421] ? __pfx___up_read+0x10/0x10 [ 26.432023][ T421] ? do_user_addr_fault+0x374/0xe30 [ 26.432034][ T421] ? do_user_addr_fault+0x374/0xe30 [ 26.432041][ T421] __x64_sys_sendto+0xe0/0x1c0 [ 26.432045][ T421] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 26.432050][ T421] do_syscall_64+0xc1/0x1d0 [ 26.432059][ T421] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 26.432064][ T421] RIP: 0033:0x7fae3fb21a4a [ 26.432069][ T421] 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 [ 26.432072][ T421] RSP: 002b:00007ffd839716e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 26.432076][ T421] RAX: ffffffffffffffda RBX: 0000000023f539d0 RCX: 00007fae3fb21a4a [ 26.432078][ T421] RDX: 0000000000000062 RSI: 0000000023f535c2 RDI: 0000000000000005 [ 26.432080][ T421] RBP: 0000000023f535c2 R08: 00007ffd839716f0 R09: 0000000000000014 [ 26.432081][ T421] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 26.432083][ T421] R13: 0000000000000062 R14: 00007ffd839716f0 R15: 0000000000000000 [ 26.432099][ T421] [ 42.901458][ T632] ip (632) used greatest stack depth: 23592 bytes left