[ 9.239177][ T220] GACT probability NOT on [ 10.254982][ T279] ip (279) used greatest stack depth: 24064 bytes left [ 11.668737][ T361] [ 11.669054][ T361] ============================= [ 11.669232][ T361] WARNING: suspicious RCU usage [ 11.669390][ T361] 7.2.0-rc1-virtme #1 Not tainted [ 11.669555][ T361] ----------------------------- [ 11.669714][ T361] drivers/net/vxlan/vxlan_core.c:1872 suspicious rcu_dereference_check() usage! [ 11.669947][ T361] [ 11.669947][ T361] other info that might help us debug this: [ 11.669947][ T361] [ 11.670224][ T361] [ 11.670224][ T361] rcu_scheduler_active = 2, debug_locks = 1 [ 11.670433][ T361] 1 lock held by arping/361: [ 11.670600][ T361] #0: ffffffff89391e60 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x206/0x1b70 [ 11.670855][ T361] [ 11.670855][ T361] stack backtrace: [ 11.671040][ T361] CPU: 2 UID: 0 PID: 361 Comm: arping Not tainted 7.2.0-rc1-virtme #1 PREEMPT(full) [ 11.671044][ T361] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.671046][ T361] Call Trace: [ 11.671048][ T361] [ 11.671050][ T361] dump_stack_lvl+0x6f/0xa0 [ 11.671057][ T361] lockdep_rcu_suspicious.cold+0x37/0x89 [ 11.671062][ T361] arp_reduce.isra.0+0x9b9/0x1080 [vxlan] [ 11.671075][ T361] ? mark_usage+0x61/0x170 [ 11.671082][ T361] ? __lock_acquire+0x518/0xc20 [ 11.671085][ T361] ? vxlan_nl2conf+0x5b30/0x5b30 [vxlan] [ 11.671090][ T361] ? lock_acquire.part.0+0xbc/0x260 [ 11.671092][ T361] ? find_held_lock+0x2b/0x80 [ 11.671095][ T361] ? __lock_release.isra.0+0x6b/0x1a0 [ 11.671100][ T361] ? vxlan_xmit+0x128b/0x1660 [vxlan] [ 11.671104][ T361] vxlan_xmit+0x128b/0x1660 [vxlan] [ 11.671109][ T361] ? rcu_lockdep_current_cpu_online+0x39/0x1b0 [ 11.671114][ T361] dev_hard_start_xmit+0xf4/0x620 [ 11.671117][ T361] ? validate_xmit_skb+0x72/0x9a0 [ 11.671120][ T361] __dev_queue_xmit+0xc04/0x1b70 [ 11.671122][ T361] ? _copy_from_iter+0x1bb/0x1810 [ 11.671126][ T361] ? __alloc_skb+0x342/0x5f0 [ 11.671130][ T361] ? _copy_from_iter_flushcache+0x1970/0x1970 [ 11.671132][ T361] ? ref_tracker_alloc+0x2e7/0x430 [ 11.671135][ T361] ? netdev_core_pick_tx+0x2c0/0x2c0 [ 11.671138][ T361] ? packet_parse_headers+0x325/0x830 [ 11.671142][ T361] ? __asan_memset+0x27/0x50 [ 11.671145][ T361] ? packet_parse_headers+0x325/0x830 [ 11.671147][ T361] ? skb_copy_datagram_from_iter+0xf3/0x6a0 [ 11.671150][ T361] ? packet_release+0xc70/0xc70 [ 11.671154][ T361] packet_snd+0xfad/0x1990 [ 11.671159][ T361] ? tpacket_snd+0x19e0/0x19e0 [ 11.671161][ T361] ? __might_fault+0x97/0x140 [ 11.671167][ T361] ? __might_fault+0x97/0x140 [ 11.671169][ T361] ? __might_fault+0x97/0x140 [ 11.671172][ T361] __sys_sendto+0x2aa/0x400 [ 11.671175][ T361] ? __ia32_sys_getpeername+0xd0/0xd0 [ 11.671184][ T361] ? do_user_addr_fault+0x325/0xe30 [ 11.671191][ T361] __x64_sys_sendto+0xe4/0x1f0 [ 11.671192][ T361] ? trace_irq_enable.constprop.0+0x9b/0x160 [ 11.671198][ T361] ? lockdep_hardirqs_on+0x8c/0x130 [ 11.671202][ T361] ? do_syscall_64+0x82/0x590 [ 11.671204][ T361] do_syscall_64+0x117/0x590 [ 11.671206][ T361] ? trace_hardirqs_off+0xd/0x30 [ 11.671207][ T361] ? exc_page_fault+0xee/0x100 [ 11.671210][ T361] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 11.671213][ T361] RIP: 0033:0x7f8aac84d54e [ 11.671216][ 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 [ 11.671218][ T361] RSP: 002b:00007ffe570e6e40 EFLAGS: 00000202 ORIG_RAX: 000000000000002c [ 11.671221][ T361] RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007f8aac84d54e [ 11.671222][ T361] RDX: 000000000000001c RSI: 00007ffe570e6ec0 RDI: 0000000000000005 [ 11.671223][ T361] RBP: 00007ffe570e6e50 R08: 00007ffe570e7340 R09: 0000000000000014 [ 11.671224][ T361] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 [ 11.671225][ T361] R13: 00007ffe570e7270 R14: ffffffffffffffe8 R15: 0000000000000000 [ 11.671231][ T361]