[ 10.486967][ T250] ip (250) used greatest stack depth: 23248 bytes left [ 15.567125][ T337] 8021q: 802.1Q VLAN Support v1.8 [ 15.885129][ T343] gre: GRE over IPv4 demultiplexor driver [ 15.927394][ T343] ip6_gre: GRE over IPv6 tunneling driver [ 25.002480][ T419] GACT probability NOT on [ 25.388832][ T422] [ 25.389213][ T422] ============================= [ 25.389389][ T422] WARNING: suspicious RCU usage [ 25.389552][ T422] 6.14.0-rc6-virtme #1 Not tainted [ 25.389718][ T422] ----------------------------- [ 25.390117][ T422] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 25.390415][ T422] [ 25.390415][ T422] other info that might help us debug this: [ 25.390415][ T422] [ 25.390729][ T422] [ 25.390729][ T422] rcu_scheduler_active = 2, debug_locks = 1 [ 25.390969][ T422] 1 lock held by mausezahn/422: [ 25.391156][ T422] #0: ffffffff8d95b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 25.391445][ T422] [ 25.391445][ T422] stack backtrace: [ 25.391643][ T422] CPU: 2 UID: 0 PID: 422 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 25.391648][ T422] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 25.391650][ T422] Call Trace: [ 25.391652][ T422] [ 25.391655][ T422] dump_stack_lvl+0xb0/0xd0 [ 25.391662][ T422] lockdep_rcu_suspicious+0x1ea/0x280 [ 25.391672][ T422] dev_hard_start_xmit+0x2fc/0x3f0 [ 25.391683][ T422] __dev_queue_xmit+0xfaf/0x18d0 [ 25.391697][ T422] ? __pfx___dev_queue_xmit+0x10/0x10 [ 25.391701][ T422] ? packet_parse_headers+0x231/0x9c0 [ 25.391709][ T422] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 25.391715][ T422] ? __pfx_packet_parse_headers+0x10/0x10 [ 25.391720][ T422] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 25.391726][ T422] ? dev_get_by_index+0xb2/0x190 [ 25.391737][ T422] packet_snd+0xd0c/0x19d0 [ 25.391748][ T422] ? __lock_release+0x103/0x460 [ 25.391751][ T422] ? __might_fault+0x11b/0x170 [ 25.391758][ T422] ? __pfx_packet_snd+0x10/0x10 [ 25.391760][ T422] ? trace_lock_acquire+0x14c/0x1f0 [ 25.391763][ T422] ? __might_fault+0x11b/0x170 [ 25.391770][ T422] ? lock_acquire+0x32/0xc0 [ 25.391776][ T422] ? __might_fault+0x11b/0x170 [ 25.391787][ T422] __sys_sendto+0x3c3/0x450 [ 25.391793][ T422] ? __pfx___sys_sendto+0x10/0x10 [ 25.391807][ T422] ? sock_ioctl+0x3b6/0x590 [ 25.391817][ T422] ? __pfx___up_read+0x10/0x10 [ 25.391825][ T422] ? do_user_addr_fault+0x374/0xe30 [ 25.391835][ T422] ? do_user_addr_fault+0x374/0xe30 [ 25.391842][ T422] __x64_sys_sendto+0xe0/0x1c0 [ 25.391845][ T422] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 25.391851][ T422] do_syscall_64+0xc1/0x1d0 [ 25.391858][ T422] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 25.391863][ T422] RIP: 0033:0x7f5cecdb5a4a [ 25.391867][ 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 [ 25.391870][ T422] RSP: 002b:00007ffda0f21af8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 25.391874][ T422] RAX: ffffffffffffffda RBX: 000000003c8a39d0 RCX: 00007f5cecdb5a4a [ 25.391876][ T422] RDX: 0000000000000062 RSI: 000000003c8a35c2 RDI: 0000000000000005 [ 25.391878][ T422] RBP: 000000003c8a35c2 R08: 00007ffda0f21b00 R09: 0000000000000014 [ 25.391880][ T422] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 25.391881][ T422] R13: 0000000000000062 R14: 00007ffda0f21b00 R15: 0000000000000000 [ 25.391897][ T422]