[ 15.984460][ T337] 8021q: 802.1Q VLAN Support v1.8 [ 16.309651][ T342] gre: GRE over IPv4 demultiplexor driver [ 16.350899][ T342] ip6_gre: GRE over IPv6 tunneling driver [ 25.744557][ T417] GACT probability NOT on [ 26.140220][ T420] [ 26.140534][ T420] ============================= [ 26.140716][ T420] WARNING: suspicious RCU usage [ 26.140900][ T420] 6.14.0-rc6-virtme #1 Not tainted [ 26.141241][ T420] ----------------------------- [ 26.141447][ T420] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 26.141720][ T420] [ 26.141720][ T420] other info that might help us debug this: [ 26.141720][ T420] [ 26.142032][ T420] [ 26.142032][ T420] rcu_scheduler_active = 2, debug_locks = 1 [ 26.142284][ T420] 1 lock held by mausezahn/420: [ 26.142466][ T420] #0: ffffffff86d5b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 26.142771][ T420] [ 26.142771][ T420] stack backtrace: [ 26.142980][ T420] CPU: 2 UID: 0 PID: 420 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 26.142985][ T420] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 26.142987][ T420] Call Trace: [ 26.142989][ T420] [ 26.142992][ T420] dump_stack_lvl+0xb0/0xd0 [ 26.142999][ T420] lockdep_rcu_suspicious+0x1ea/0x280 [ 26.143010][ T420] dev_hard_start_xmit+0x2fc/0x3f0 [ 26.143020][ T420] __dev_queue_xmit+0xfaf/0x18d0 [ 26.143034][ T420] ? __pfx___dev_queue_xmit+0x10/0x10 [ 26.143039][ T420] ? packet_parse_headers+0x231/0x9c0 [ 26.143047][ T420] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 26.143053][ T420] ? __pfx_packet_parse_headers+0x10/0x10 [ 26.143058][ T420] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 26.143063][ T420] ? dev_get_by_index+0xb2/0x190 [ 26.143074][ T420] packet_snd+0xd0c/0x19d0 [ 26.143085][ T420] ? __lock_release+0x103/0x460 [ 26.143089][ T420] ? __might_fault+0x11b/0x170 [ 26.143098][ T420] ? __pfx_packet_snd+0x10/0x10 [ 26.143100][ T420] ? trace_lock_acquire+0x14c/0x1f0 [ 26.143103][ T420] ? __might_fault+0x11b/0x170 [ 26.143110][ T420] ? lock_acquire+0x32/0xc0 [ 26.143116][ T420] ? __might_fault+0x11b/0x170 [ 26.143126][ T420] __sys_sendto+0x3c3/0x450 [ 26.143132][ T420] ? __pfx___sys_sendto+0x10/0x10 [ 26.143149][ T420] ? sock_ioctl+0x3b6/0x590 [ 26.143159][ T420] ? __pfx___up_read+0x10/0x10 [ 26.143167][ T420] ? do_user_addr_fault+0x374/0xe30 [ 26.143177][ T420] ? do_user_addr_fault+0x374/0xe30 [ 26.143185][ T420] __x64_sys_sendto+0xe0/0x1c0 [ 26.143188][ T420] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 26.143194][ T420] do_syscall_64+0xc1/0x1d0 [ 26.143202][ T420] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 26.143206][ T420] RIP: 0033:0x7fbf19aa6a4a [ 26.143211][ 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 [ 26.143214][ T420] RSP: 002b:00007ffcd15f18d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 26.143217][ T420] RAX: ffffffffffffffda RBX: 00000000300c39d0 RCX: 00007fbf19aa6a4a [ 26.143219][ T420] RDX: 0000000000000062 RSI: 00000000300c35c2 RDI: 0000000000000005 [ 26.143221][ T420] RBP: 00000000300c35c2 R08: 00007ffcd15f18e0 R09: 0000000000000014 [ 26.143223][ T420] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 26.143225][ T420] R13: 0000000000000062 R14: 00007ffcd15f18e0 R15: 0000000000000000 [ 26.143241][ T420] [ 43.349617][ T631] ip (631) used greatest stack depth: 23672 bytes left