[ 10.478341][ T251] ip (251) used greatest stack depth: 24168 bytes left [ 15.637611][ T339] 8021q: 802.1Q VLAN Support v1.8 [ 16.007388][ T344] gre: GRE over IPv4 demultiplexor driver [ 16.053456][ T344] ip6_gre: GRE over IPv6 tunneling driver [ 18.159207][ T373] ip (373) used greatest stack depth: 23856 bytes left [ 25.447083][ T420] GACT probability NOT on [ 25.804158][ T423] [ 25.804395][ T423] ============================= [ 25.804585][ T423] WARNING: suspicious RCU usage [ 25.804751][ T423] 6.14.0-rc6-virtme #1 Not tainted [ 25.805039][ T423] ----------------------------- [ 25.805220][ T423] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 25.805513][ T423] [ 25.805513][ T423] other info that might help us debug this: [ 25.805513][ T423] [ 25.805837][ T423] [ 25.805837][ T423] rcu_scheduler_active = 2, debug_locks = 1 [ 25.806088][ T423] 1 lock held by mausezahn/423: [ 25.806275][ T423] #0: ffffffffb455b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 25.806583][ T423] [ 25.806583][ T423] stack backtrace: [ 25.806788][ T423] CPU: 0 UID: 0 PID: 423 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 25.806793][ T423] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 25.806794][ T423] Call Trace: [ 25.806796][ T423] [ 25.806799][ T423] dump_stack_lvl+0xb0/0xd0 [ 25.806806][ T423] lockdep_rcu_suspicious+0x1ea/0x280 [ 25.806816][ T423] dev_hard_start_xmit+0x2fc/0x3f0 [ 25.806826][ T423] __dev_queue_xmit+0xfaf/0x18d0 [ 25.806841][ T423] ? __pfx___dev_queue_xmit+0x10/0x10 [ 25.806845][ T423] ? packet_parse_headers+0x231/0x9c0 [ 25.806853][ T423] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 25.806860][ T423] ? __pfx_packet_parse_headers+0x10/0x10 [ 25.806867][ T423] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 25.806873][ T423] ? dev_get_by_index+0xb2/0x190 [ 25.806888][ T423] packet_snd+0xd0c/0x19d0 [ 25.806904][ T423] ? __lock_release+0x103/0x460 [ 25.806908][ T423] ? __might_fault+0x11b/0x170 [ 25.806919][ T423] ? __pfx_packet_snd+0x10/0x10 [ 25.806922][ T423] ? trace_lock_acquire+0x14c/0x1f0 [ 25.806925][ T423] ? __might_fault+0x11b/0x170 [ 25.806932][ T423] ? lock_acquire+0x32/0xc0 [ 25.806938][ T423] ? __might_fault+0x11b/0x170 [ 25.806949][ T423] __sys_sendto+0x3c3/0x450 [ 25.806955][ T423] ? __pfx___sys_sendto+0x10/0x10 [ 25.806970][ T423] ? sock_ioctl+0x3b6/0x590 [ 25.806979][ T423] ? __pfx___up_read+0x10/0x10 [ 25.806987][ T423] ? do_user_addr_fault+0x374/0xe30 [ 25.806997][ T423] ? do_user_addr_fault+0x374/0xe30 [ 25.807004][ T423] __x64_sys_sendto+0xe0/0x1c0 [ 25.807008][ T423] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 25.807013][ T423] do_syscall_64+0xc1/0x1d0 [ 25.807020][ T423] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 25.807025][ T423] RIP: 0033:0x7ff8a3cc0a4a [ 25.807030][ T423] 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 [ 25.807033][ T423] RSP: 002b:00007ffcc2b5a948 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 25.807036][ T423] RAX: ffffffffffffffda RBX: 000000000325e9d0 RCX: 00007ff8a3cc0a4a [ 25.807038][ T423] RDX: 0000000000000062 RSI: 000000000325e5c2 RDI: 0000000000000005 [ 25.807040][ T423] RBP: 000000000325e5c2 R08: 00007ffcc2b5a950 R09: 0000000000000014 [ 25.807042][ T423] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 25.807044][ T423] R13: 0000000000000062 R14: 00007ffcc2b5a950 R15: 0000000000000000 [ 25.807059][ T423]