[ 9.187276][ T216] GACT probability NOT on [ 11.625238][ T361] [ 11.625382][ T361] ============================= [ 11.625496][ T361] WARNING: suspicious RCU usage [ 11.625607][ T361] 7.2.0-rc1-virtme #1 Not tainted [ 11.625717][ T361] ----------------------------- [ 11.625825][ T361] drivers/net/vxlan/vxlan_core.c:1872 suspicious rcu_dereference_check() usage! [ 11.626014][ T361] [ 11.626014][ T361] other info that might help us debug this: [ 11.626014][ T361] [ 11.626267][ T361] [ 11.626267][ T361] rcu_scheduler_active = 2, debug_locks = 1 [ 11.626434][ T361] 1 lock held by arping/361: [ 11.626551][ T361] #0: ffffffffb8991e60 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x206/0x1b70 [ 11.626759][ T361] [ 11.626759][ T361] stack backtrace: [ 11.626949][ T361] CPU: 0 UID: 0 PID: 361 Comm: arping Not tainted 7.2.0-rc1-virtme #1 PREEMPT(full) [ 11.626951][ T361] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.626953][ T361] Call Trace: [ 11.626955][ T361] [ 11.626956][ T361] dump_stack_lvl+0x6f/0xa0 [ 11.626963][ T361] lockdep_rcu_suspicious.cold+0x37/0x89 [ 11.626968][ T361] arp_reduce.isra.0+0x9b9/0x1080 [vxlan] [ 11.626975][ T361] ? mark_usage+0x61/0x170 [ 11.626980][ T361] ? __lock_acquire+0x518/0xc20 [ 11.626983][ T361] ? vxlan_nl2conf+0x5b30/0x5b30 [vxlan] [ 11.626988][ T361] ? lock_acquire.part.0+0xbc/0x260 [ 11.626990][ T361] ? find_held_lock+0x2b/0x80 [ 11.626995][ T361] ? __lock_release.isra.0+0x6b/0x1a0 [ 11.626999][ T361] ? vxlan_xmit+0x128b/0x1660 [vxlan] [ 11.627004][ T361] vxlan_xmit+0x128b/0x1660 [vxlan] [ 11.627009][ T361] ? rcu_lockdep_current_cpu_online+0x39/0x1b0 [ 11.627014][ T361] dev_hard_start_xmit+0xf4/0x620 [ 11.627017][ T361] ? validate_xmit_skb+0x72/0x9a0 [ 11.627019][ T361] __dev_queue_xmit+0xc04/0x1b70 [ 11.627021][ T361] ? _copy_from_iter+0x1bb/0x1810 [ 11.627026][ T361] ? __alloc_skb+0x342/0x5f0 [ 11.627029][ T361] ? _copy_from_iter_flushcache+0x1970/0x1970 [ 11.627031][ T361] ? ref_tracker_alloc+0x2e7/0x430 [ 11.627034][ T361] ? netdev_core_pick_tx+0x2c0/0x2c0 [ 11.627038][ T361] ? packet_parse_headers+0x325/0x830 [ 11.627041][ T361] ? __asan_memset+0x27/0x50 [ 11.627045][ T361] ? packet_parse_headers+0x325/0x830 [ 11.627047][ T361] ? skb_copy_datagram_from_iter+0xf3/0x6a0 [ 11.627050][ T361] ? packet_release+0xc70/0xc70 [ 11.627054][ T361] packet_snd+0xfad/0x1990 [ 11.627059][ T361] ? tpacket_snd+0x19e0/0x19e0 [ 11.627061][ T361] ? __might_fault+0x97/0x140 [ 11.627067][ T361] ? __might_fault+0x97/0x140 [ 11.627069][ T361] ? __might_fault+0x97/0x140 [ 11.627072][ T361] __sys_sendto+0x2aa/0x400 [ 11.627075][ T361] ? __ia32_sys_getpeername+0xd0/0xd0 [ 11.627084][ T361] ? do_user_addr_fault+0x325/0xe30 [ 11.627090][ T361] __x64_sys_sendto+0xe4/0x1f0 [ 11.627091][ T361] ? trace_irq_enable.constprop.0+0x9b/0x160 [ 11.627095][ T361] ? lockdep_hardirqs_on+0x8c/0x130 [ 11.627099][ T361] ? do_syscall_64+0x82/0x590 [ 11.627101][ T361] do_syscall_64+0x117/0x590 [ 11.627102][ T361] ? trace_hardirqs_off+0xd/0x30 [ 11.627104][ T361] ? exc_page_fault+0xee/0x100 [ 11.627107][ T361] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 11.627109][ T361] RIP: 0033:0x7f2b9a11954e [ 11.627113][ T361] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa [ 11.627114][ T361] RSP: 002b:00007ffddaba55b0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c [ 11.627117][ T361] RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007f2b9a11954e [ 11.627118][ T361] RDX: 000000000000001c RSI: 00007ffddaba5630 RDI: 0000000000000005 [ 11.627119][ T361] RBP: 00007ffddaba55c0 R08: 00007ffddaba5ab0 R09: 0000000000000014 [ 11.627120][ T361] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 [ 11.627121][ T361] R13: 00007ffddaba59e0 R14: ffffffffffffffe8 R15: 0000000000000000 [ 11.627127][ T361]