[ 79.974429][ T1016] GACT probability NOT on [ 82.417455][ T1159] [ 82.417618][ T1159] ============================= [ 82.417749][ T1159] WARNING: suspicious RCU usage [ 82.417869][ T1159] 7.2.0-rc2-virtme #1 Not tainted [ 82.417980][ T1159] ----------------------------- [ 82.418091][ T1159] drivers/net/vxlan/vxlan_core.c:1872 suspicious rcu_dereference_check() usage! [ 82.418413][ T1159] [ 82.418413][ T1159] other info that might help us debug this: [ 82.418413][ T1159] [ 82.418636][ T1159] [ 82.418636][ T1159] rcu_scheduler_active = 2, debug_locks = 1 [ 82.418809][ T1159] 1 lock held by arping/1159: [ 82.418923][ T1159] #0: ffffffffaf391d60 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x204/0x1b90 [ 82.419129][ T1159] [ 82.419129][ T1159] stack backtrace: [ 82.419270][ T1159] CPU: 3 UID: 0 PID: 1159 Comm: arping Not tainted 7.2.0-rc2-virtme #1 PREEMPT(full) [ 82.419273][ T1159] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 82.419275][ T1159] Call Trace: [ 82.419277][ T1159] [ 82.419278][ T1159] dump_stack_lvl+0x6f/0xa0 [ 82.419284][ T1159] lockdep_rcu_suspicious.cold+0x37/0x89 [ 82.419290][ T1159] arp_reduce.isra.0+0x9b9/0x1080 [vxlan] [ 82.419297][ T1159] ? mark_usage+0x61/0x170 [ 82.419302][ T1159] ? __lock_acquire+0x518/0xc20 [ 82.419305][ T1159] ? vxlan_nl2conf+0x5b30/0x5b30 [vxlan] [ 82.419310][ T1159] ? lock_acquire.part.0+0xbc/0x260 [ 82.419312][ T1159] ? find_held_lock+0x2b/0x80 [ 82.419315][ T1159] ? __lock_release.isra.0+0x6b/0x1a0 [ 82.419319][ T1159] ? vxlan_xmit+0x128b/0x1660 [vxlan] [ 82.419324][ T1159] vxlan_xmit+0x128b/0x1660 [vxlan] [ 82.419329][ T1159] ? rcu_lockdep_current_cpu_online+0x39/0x1b0 [ 82.419334][ T1159] dev_hard_start_xmit+0xf4/0x620 [ 82.419337][ T1159] ? validate_xmit_skb+0x72/0x9a0 [ 82.419339][ T1159] __dev_queue_xmit+0xc1a/0x1b90 [ 82.419341][ T1159] ? _copy_from_iter+0x1bb/0x1810 [ 82.419346][ T1159] ? __alloc_skb+0x342/0x5f0 [ 82.419349][ T1159] ? _copy_from_iter_flushcache+0x1970/0x1970 [ 82.419351][ T1159] ? ref_tracker_alloc+0x2e7/0x430 [ 82.419354][ T1159] ? netdev_core_pick_tx+0x2c0/0x2c0 [ 82.419358][ T1159] ? packet_parse_headers+0x325/0x830 [ 82.419361][ T1159] ? __asan_memset+0x27/0x50 [ 82.419364][ T1159] ? packet_parse_headers+0x325/0x830 [ 82.419367][ T1159] ? skb_copy_datagram_from_iter+0xf3/0x6a0 [ 82.419369][ T1159] ? packet_release+0xc70/0xc70 [ 82.419373][ T1159] packet_snd+0xfad/0x1990 [ 82.419379][ T1159] ? tpacket_snd+0x19e0/0x19e0 [ 82.419381][ T1159] ? __might_fault+0x97/0x140 [ 82.419387][ T1159] ? __might_fault+0x97/0x140 [ 82.419389][ T1159] ? __might_fault+0x97/0x140 [ 82.419392][ T1159] __sys_sendto+0x2aa/0x400 [ 82.419395][ T1159] ? __ia32_sys_getpeername+0xd0/0xd0 [ 82.419404][ T1159] ? do_user_addr_fault+0x325/0xe30 [ 82.419410][ T1159] __x64_sys_sendto+0xe4/0x1f0 [ 82.419411][ T1159] ? trace_irq_enable.constprop.0+0x9b/0x160 [ 82.419415][ T1159] ? lockdep_hardirqs_on+0x8c/0x130 [ 82.419417][ T1159] ? do_syscall_64+0x82/0x590 [ 82.419420][ T1159] do_syscall_64+0x117/0x590 [ 82.419421][ T1159] ? trace_hardirqs_off+0xd/0x30 [ 82.419423][ T1159] ? exc_page_fault+0xee/0x100 [ 82.419426][ T1159] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 82.419428][ T1159] RIP: 0033:0x7fb1f2d2854e [ 82.419432][ T1159] 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 [ 82.419434][ T1159] RSP: 002b:00007fff81a40ec0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c [ 82.419436][ T1159] RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007fb1f2d2854e [ 82.419437][ T1159] RDX: 000000000000001c RSI: 00007fff81a40f40 RDI: 0000000000000005 [ 82.419438][ T1159] RBP: 00007fff81a40ed0 R08: 00007fff81a413c0 R09: 0000000000000014 [ 82.419439][ T1159] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 [ 82.419440][ T1159] R13: 00007fff81a412f0 R14: ffffffffffffffe8 R15: 0000000000000000 [ 82.419446][ T1159]