[ 2103.056246][ T1206] GACT probability NOT on [ 2105.487679][ T1348] [ 2105.487875][ T1348] ============================= [ 2105.487991][ T1348] WARNING: suspicious RCU usage [ 2105.488103][ T1348] 7.2.0-rc2-virtme #1 Not tainted [ 2105.488216][ T1348] ----------------------------- [ 2105.488506][ T1348] drivers/net/vxlan/vxlan_core.c:1872 suspicious rcu_dereference_check() usage! [ 2105.488760][ T1348] [ 2105.488760][ T1348] other info that might help us debug this: [ 2105.488760][ T1348] [ 2105.488982][ T1348] [ 2105.488982][ T1348] rcu_scheduler_active = 2, debug_locks = 1 [ 2105.489151][ T1348] 1 lock held by arping/1348: [ 2105.489283][ T1348] #0: ffffffffb5991d60 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x206/0x1b70 [ 2105.489489][ T1348] [ 2105.489489][ T1348] stack backtrace: [ 2105.489633][ T1348] CPU: 1 UID: 0 PID: 1348 Comm: arping Not tainted 7.2.0-rc2-virtme #1 PREEMPT(full) [ 2105.489635][ T1348] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 2105.489637][ T1348] Call Trace: [ 2105.489639][ T1348] [ 2105.489640][ T1348] dump_stack_lvl+0x6f/0xa0 [ 2105.489646][ T1348] lockdep_rcu_suspicious.cold+0x37/0x89 [ 2105.489651][ T1348] arp_reduce.isra.0+0x9b9/0x1080 [vxlan] [ 2105.489658][ T1348] ? mark_usage+0x61/0x170 [ 2105.489663][ T1348] ? __lock_acquire+0x518/0xc20 [ 2105.489666][ T1348] ? vxlan_nl2conf+0x5b30/0x5b30 [vxlan] [ 2105.489671][ T1348] ? lock_acquire.part.0+0xbc/0x260 [ 2105.489673][ T1348] ? find_held_lock+0x2b/0x80 [ 2105.489676][ T1348] ? __lock_release.isra.0+0x6b/0x1a0 [ 2105.489680][ T1348] ? vxlan_xmit+0x128b/0x1660 [vxlan] [ 2105.489684][ T1348] vxlan_xmit+0x128b/0x1660 [vxlan] [ 2105.489689][ T1348] ? rcu_lockdep_current_cpu_online+0x39/0x1b0 [ 2105.489694][ T1348] dev_hard_start_xmit+0xf4/0x620 [ 2105.489697][ T1348] ? validate_xmit_skb+0x72/0x9a0 [ 2105.489700][ T1348] __dev_queue_xmit+0xc04/0x1b70 [ 2105.489702][ T1348] ? _copy_from_iter+0x1bb/0x1810 [ 2105.489707][ T1348] ? __alloc_skb+0x342/0x5f0 [ 2105.489710][ T1348] ? _copy_from_iter_flushcache+0x1970/0x1970 [ 2105.489712][ T1348] ? ref_tracker_alloc+0x2e7/0x430 [ 2105.489715][ T1348] ? netdev_core_pick_tx+0x2c0/0x2c0 [ 2105.489719][ T1348] ? packet_parse_headers+0x325/0x830 [ 2105.489722][ T1348] ? __asan_memset+0x27/0x50 [ 2105.489725][ T1348] ? packet_parse_headers+0x325/0x830 [ 2105.489727][ T1348] ? skb_copy_datagram_from_iter+0xf3/0x6a0 [ 2105.489730][ T1348] ? packet_release+0xc70/0xc70 [ 2105.489734][ T1348] packet_snd+0xfad/0x1990 [ 2105.489739][ T1348] ? tpacket_snd+0x19e0/0x19e0 [ 2105.489744][ T1348] ? __might_fault+0x97/0x140 [ 2105.489750][ T1348] ? __might_fault+0x97/0x140 [ 2105.489752][ T1348] ? __might_fault+0x97/0x140 [ 2105.489756][ T1348] __sys_sendto+0x2aa/0x400 [ 2105.489759][ T1348] ? __ia32_sys_getpeername+0xd0/0xd0 [ 2105.489767][ T1348] ? do_user_addr_fault+0x325/0xe30 [ 2105.489773][ T1348] __x64_sys_sendto+0xe4/0x1f0 [ 2105.489775][ T1348] ? trace_irq_enable.constprop.0+0x9b/0x160 [ 2105.489778][ T1348] ? lockdep_hardirqs_on+0x8c/0x130 [ 2105.489781][ T1348] ? do_syscall_64+0x82/0x590 [ 2105.489783][ T1348] do_syscall_64+0x117/0x590 [ 2105.489785][ T1348] ? trace_hardirqs_off+0xd/0x30 [ 2105.489786][ T1348] ? exc_page_fault+0xee/0x100 [ 2105.489789][ T1348] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 2105.489791][ T1348] RIP: 0033:0x7fcc8a9cc54e [ 2105.489794][ T1348] 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 [ 2105.489796][ T1348] RSP: 002b:00007ffe46aab7f0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c [ 2105.489798][ T1348] RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007fcc8a9cc54e [ 2105.489800][ T1348] RDX: 000000000000001c RSI: 00007ffe46aab870 RDI: 0000000000000005 [ 2105.489801][ T1348] RBP: 00007ffe46aab800 R08: 00007ffe46aabcf0 R09: 0000000000000014 [ 2105.489801][ T1348] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 [ 2105.489802][ T1348] R13: 00007ffe46aabc20 R14: ffffffffffffffe8 R15: 0000000000000000 [ 2105.489808][ T1348]