[ 10.585652][ T250] ip (250) used greatest stack depth: 24224 bytes left [ 11.029418][ T263] ip (263) used greatest stack depth: 23120 bytes left [ 15.783193][ T335] 8021q: 802.1Q VLAN Support v1.8 [ 16.102304][ T340] gre: GRE over IPv4 demultiplexor driver [ 16.143350][ T340] ip6_gre: GRE over IPv6 tunneling driver [ 25.366672][ T416] GACT probability NOT on [ 25.772036][ T420] [ 25.772453][ T420] ============================= [ 25.772708][ T420] WARNING: suspicious RCU usage [ 25.773179][ T420] 6.14.0-rc6-virtme #1 Not tainted [ 25.773432][ T420] ----------------------------- [ 25.773674][ T420] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 25.774106][ T420] [ 25.774106][ T420] other info that might help us debug this: [ 25.774106][ T420] [ 25.774651][ T420] [ 25.774651][ T420] rcu_scheduler_active = 2, debug_locks = 1 [ 25.775014][ T420] 1 lock held by mausezahn/420: [ 25.775394][ T420] #0: ffffffff96b5b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 25.775874][ T420] [ 25.775874][ T420] stack backtrace: [ 25.776214][ T420] CPU: 1 UID: 0 PID: 420 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 25.776221][ T420] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 25.776223][ T420] Call Trace: [ 25.776226][ T420] [ 25.776229][ T420] dump_stack_lvl+0xb0/0xd0 [ 25.776239][ T420] lockdep_rcu_suspicious+0x1ea/0x280 [ 25.776255][ T420] dev_hard_start_xmit+0x2fc/0x3f0 [ 25.776276][ T420] __dev_queue_xmit+0xfaf/0x18d0 [ 25.776301][ T420] ? __pfx___dev_queue_xmit+0x10/0x10 [ 25.776308][ T420] ? packet_parse_headers+0x231/0x9c0 [ 25.776324][ T420] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 25.776332][ T420] ? __pfx_packet_parse_headers+0x10/0x10 [ 25.776339][ T420] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 25.776348][ T420] ? dev_get_by_index+0xb2/0x190 [ 25.776367][ T420] packet_snd+0xd0c/0x19d0 [ 25.776390][ T420] ? __lock_release+0x103/0x460 [ 25.776395][ T420] ? __might_fault+0x11b/0x170 [ 25.776405][ T420] ? __pfx_packet_snd+0x10/0x10 [ 25.776409][ T420] ? trace_lock_acquire+0x14c/0x1f0 [ 25.776414][ T420] ? __might_fault+0x11b/0x170 [ 25.776427][ T420] ? lock_acquire+0x32/0xc0 [ 25.776440][ T420] ? __might_fault+0x11b/0x170 [ 25.776461][ T420] __sys_sendto+0x3c3/0x450 [ 25.776472][ T420] ? __pfx___sys_sendto+0x10/0x10 [ 25.776500][ T420] ? sock_ioctl+0x3b6/0x590 [ 25.776517][ T420] ? __pfx___up_read+0x10/0x10 [ 25.776530][ T420] ? do_user_addr_fault+0x374/0xe30 [ 25.776548][ T420] ? do_user_addr_fault+0x374/0xe30 [ 25.776561][ T420] __x64_sys_sendto+0xe0/0x1c0 [ 25.776568][ T420] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 25.776578][ T420] do_syscall_64+0xc1/0x1d0 [ 25.776590][ T420] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 25.776596][ T420] RIP: 0033:0x7f279a4b3a4a [ 25.776603][ T420] 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 [ 25.776608][ T420] RSP: 002b:00007ffe21f165b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 25.776613][ T420] RAX: ffffffffffffffda RBX: 00000000279cc9d0 RCX: 00007f279a4b3a4a [ 25.776616][ T420] RDX: 0000000000000062 RSI: 00000000279cc5c2 RDI: 0000000000000005 [ 25.776619][ T420] RBP: 00000000279cc5c2 R08: 00007ffe21f165c0 R09: 0000000000000014 [ 25.776622][ T420] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 25.776625][ T420] R13: 0000000000000062 R14: 00007ffe21f165c0 R15: 0000000000000000 [ 25.776656][ T420]