[ 16.155047][ T337] 8021q: 802.1Q VLAN Support v1.8 [ 16.486607][ T342] gre: GRE over IPv4 demultiplexor driver [ 16.532449][ T342] ip6_gre: GRE over IPv6 tunneling driver [ 25.891855][ T418] GACT probability NOT on [ 26.329238][ T421] [ 26.329645][ T421] ============================= [ 26.329841][ T421] WARNING: suspicious RCU usage [ 26.330055][ T421] 6.14.0-rc6-virtme #1 Not tainted [ 26.330255][ T421] ----------------------------- [ 26.330616][ T421] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage! [ 26.330912][ T421] [ 26.330912][ T421] other info that might help us debug this: [ 26.330912][ T421] [ 26.331256][ T421] [ 26.331256][ T421] rcu_scheduler_active = 2, debug_locks = 1 [ 26.331517][ T421] 1 lock held by mausezahn/421: [ 26.331700][ T421] #0: ffffffffb8f5b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0 [ 26.332020][ T421] [ 26.332020][ T421] stack backtrace: [ 26.332254][ T421] CPU: 2 UID: 0 PID: 421 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1 [ 26.332259][ T421] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 26.332261][ T421] Call Trace: [ 26.332264][ T421] [ 26.332267][ T421] dump_stack_lvl+0xb0/0xd0 [ 26.332275][ T421] lockdep_rcu_suspicious+0x1ea/0x280 [ 26.332288][ T421] dev_hard_start_xmit+0x2fc/0x3f0 [ 26.332298][ T421] __dev_queue_xmit+0xfaf/0x18d0 [ 26.332312][ T421] ? __pfx___dev_queue_xmit+0x10/0x10 [ 26.332317][ T421] ? packet_parse_headers+0x231/0x9c0 [ 26.332326][ T421] ? __pfx_sock_alloc_send_pskb+0x10/0x10 [ 26.332333][ T421] ? __pfx_packet_parse_headers+0x10/0x10 [ 26.332337][ T421] ? skb_copy_datagram_from_iter+0xe6/0x6f0 [ 26.332343][ T421] ? dev_get_by_index+0xb2/0x190 [ 26.332356][ T421] packet_snd+0xd0c/0x19d0 [ 26.332367][ T421] ? __lock_release+0x103/0x460 [ 26.332371][ T421] ? __might_fault+0x11b/0x170 [ 26.332379][ T421] ? __pfx_packet_snd+0x10/0x10 [ 26.332381][ T421] ? trace_lock_acquire+0x14c/0x1f0 [ 26.332384][ T421] ? __might_fault+0x11b/0x170 [ 26.332390][ T421] ? lock_acquire+0x32/0xc0 [ 26.332397][ T421] ? __might_fault+0x11b/0x170 [ 26.332408][ T421] __sys_sendto+0x3c3/0x450 [ 26.332414][ T421] ? __pfx___sys_sendto+0x10/0x10 [ 26.332428][ T421] ? sock_ioctl+0x3b6/0x590 [ 26.332441][ T421] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 26.332457][ T421] __x64_sys_sendto+0xe0/0x1c0 [ 26.332460][ T421] ? __pfx___x64_sys_sendto+0x10/0x10 [ 26.332466][ T421] do_syscall_64+0xc1/0x1d0 [ 26.332474][ T421] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 26.332480][ T421] RIP: 0033:0x7fcdd6d9da4a [ 26.332486][ T421] 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 [ 26.332489][ T421] RSP: 002b:00007ffcbd7522c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 26.332493][ T421] RAX: ffffffffffffffda RBX: 000000001ead69d0 RCX: 00007fcdd6d9da4a [ 26.332495][ T421] RDX: 0000000000000062 RSI: 000000001ead65c2 RDI: 0000000000000005 [ 26.332497][ T421] RBP: 000000001ead65c2 R08: 00007ffcbd7522d0 R09: 0000000000000014 [ 26.332499][ T421] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 26.332501][ T421] R13: 0000000000000062 R14: 00007ffcbd7522d0 R15: 0000000000000000 [ 26.332517][ T421]