[ 11.094202][ T259] ip (259) used greatest stack depth: 24448 bytes left [ 16.115092][ T338] 8021q: 802.1Q VLAN Support v1.8 [ 16.431195][ T343] gre: GRE over IPv4 demultiplexor driver [ 16.481132][ T343] ip6_gre: GRE over IPv6 tunneling driver [ 25.607795][ T419] GACT probability NOT on [ 25.967462][ T422] [ 25.967714][ T422] ============================= [ 25.967894][ T422] WARNING: suspicious RCU usage [ 25.968089][ T422] 6.14.0-rc6-virtme #1 Not tainted [ 25.968289][ T422] ----------------------------- [ 25.968634][ T422] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 25.968922][ T422] [ 25.968922][ T422] other info that might help us debug this: [ 25.968922][ T422] [ 25.969268][ T422] [ 25.969268][ T422] rcu_scheduler_active = 2, debug_locks = 1 [ 25.969518][ T422] 1 lock held by mausezahn/422: [ 25.969702][ T422] #0: ffffffff9075b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 25.970049][ T422] [ 25.970049][ T422] stack backtrace: [ 25.970278][ T422] CPU: 0 UID: 0 PID: 422 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 25.970282][ T422] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 25.970284][ T422] Call Trace: [ 25.970289][ T422] [ 25.970291][ T422] dump_stack_lvl+0xb0/0xd0 [ 25.970306][ T422] lockdep_rcu_suspicious+0x1ea/0x280 [ 25.970329][ T422] dev_hard_start_xmit+0x2fc/0x3f0 [ 25.970339][ T422] __dev_queue_xmit+0xfaf/0x18d0 [ 25.970353][ T422] ? __pfx___dev_queue_xmit+0x10/0x10 [ 25.970357][ T422] ? packet_parse_headers+0x231/0x9c0 [ 25.970367][ T422] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 25.970378][ T422] ? __pfx_packet_parse_headers+0x10/0x10 [ 25.970382][ T422] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 25.970389][ T422] ? dev_get_by_index+0xb2/0x190 [ 25.970400][ T422] packet_snd+0xd0c/0x19d0 [ 25.970411][ T422] ? __lock_release+0x103/0x460 [ 25.970417][ T422] ? __might_fault+0x11b/0x170 [ 25.970427][ T422] ? __pfx_packet_snd+0x10/0x10 [ 25.970429][ T422] ? trace_lock_acquire+0x14c/0x1f0 [ 25.970432][ T422] ? __might_fault+0x11b/0x170 [ 25.970439][ T422] ? lock_acquire+0x32/0xc0 [ 25.970445][ T422] ? __might_fault+0x11b/0x170 [ 25.970456][ T422] __sys_sendto+0x3c3/0x450 [ 25.970463][ T422] ? __pfx___sys_sendto+0x10/0x10 [ 25.970477][ T422] ? sock_ioctl+0x3b6/0x590 [ 25.970490][ T422] ? __pfx___up_read+0x10/0x10 [ 25.970499][ T422] ? do_user_addr_fault+0x374/0xe30 [ 25.970518][ T422] ? do_user_addr_fault+0x374/0xe30 [ 25.970525][ T422] __x64_sys_sendto+0xe0/0x1c0 [ 25.970529][ T422] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 25.970534][ T422] do_syscall_64+0xc1/0x1d0 [ 25.970543][ T422] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 25.970554][ T422] RIP: 0033:0x7f607459ea4a [ 25.970561][ T422] 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 [ 25.970563][ T422] RSP: 002b:00007ffffcb2e988 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 25.970570][ T422] RAX: ffffffffffffffda RBX: 00000000146279d0 RCX: 00007f607459ea4a [ 25.970572][ T422] RDX: 0000000000000062 RSI: 00000000146275c2 RDI: 0000000000000005 [ 25.970574][ T422] RBP: 00000000146275c2 R08: 00007ffffcb2e990 R09: 0000000000000014 [ 25.970577][ T422] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 25.970579][ T422] R13: 0000000000000062 R14: 00007ffffcb2e990 R15: 0000000000000000 [ 25.970595][ T422] [ 41.667751][ T633] ip (633) used greatest stack depth: 24136 bytes left