[ 69.745494][ T1414] mpls_gso: MPLS GSO support [ 168.494066][ T5463] ip (5463) used greatest stack depth: 24016 bytes left [ 526.043144][T18715] ip (18715) used greatest stack depth: 23872 bytes left [ 712.443749][T25125] [ 712.443984][T25125] ============================= [ 712.444128][T25125] WARNING: suspicious RCU usage [ 712.444269][T25125] 7.0.0-rc1-virtme #1 Not tainted [ 712.444411][T25125] ----------------------------- [ 712.444802][T25125] net/ipv6/ip6_fib.c:111 suspicious rcu_dereference_protected() usage! [ 712.445030][T25125] [ 712.445030][T25125] other info that might help us debug this: [ 712.445030][T25125] [ 712.445283][T25125] [ 712.445283][T25125] rcu_scheduler_active = 2, debug_locks = 1 [ 712.445478][T25125] 1 lock held by ip/25125: [ 712.445610][T25125] #0: ffffffff8c8a1d28 (rtnl_mutex){+.+.}-{4:4}, at: rtm_new_nexthop+0x1a6/0x8c0 [ 712.445859][T25125] [ 712.445859][T25125] stack backtrace: [ 712.446022][T25125] CPU: 0 UID: 0 PID: 25125 Comm: ip Not tainted 7.0.0-rc1-virtme #1 PREEMPT(full) [ 712.446025][T25125] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 712.446027][T25125] Call Trace: [ 712.446029][T25125] [ 712.446030][T25125] dump_stack_lvl+0x6f/0xa0 [ 712.446036][T25125] lockdep_rcu_suspicious.cold+0x4f/0xad [ 712.446042][T25125] fib6_update_sernum+0xfb/0x130 [ 712.446046][T25125] nh_rt_cache_flush+0x8d/0x380 [ 712.446050][T25125] replace_nexthop+0x347/0x6e0 [ 712.446055][T25125] insert_nexthop+0x41e/0x7a0 [ 712.446059][T25125] rtm_new_nexthop+0x3a0/0x8c0 [ 712.446062][T25125] ? insert_nexthop+0x7a0/0x7a0 [ 712.446064][T25125] ? lock_acquire.part.0+0xbc/0x260 [ 712.446067][T25125] ? find_held_lock+0x2b/0x80 [ 712.446074][T25125] ? lock_acquire.part.0+0xbc/0x260 [ 712.446075][T25125] ? find_held_lock+0x2b/0x80 [ 712.446081][T25125] ? find_held_lock+0x2b/0x80 [ 712.446083][T25125] ? insert_nexthop+0x7a0/0x7a0 [ 712.446085][T25125] ? __lock_release.isra.0+0x59/0x170 [ 712.446089][T25125] ? insert_nexthop+0x7a0/0x7a0 [ 712.446091][T25125] rtnetlink_rcv_msg+0x6fe/0xb90 [ 712.446096][T25125] ? rtnl_fdb_dump+0x620/0x620 [ 712.446099][T25125] ? __lock_acquire+0x577/0xc10 [ 712.446102][T25125] ? lock_acquire.part.0+0xbc/0x260 [ 712.446104][T25125] ? find_held_lock+0x2b/0x80 [ 712.446107][T25125] netlink_rcv_skb+0x123/0x380 [ 712.446110][T25125] ? rtnl_fdb_dump+0x620/0x620 [ 712.446113][T25125] ? netlink_ack+0xce0/0xce0 [ 712.446119][T25125] ? netlink_deliver_tap+0xc5/0x330 [ 712.446121][T25125] ? netlink_deliver_tap+0x13f/0x330 [ 712.446125][T25125] netlink_unicast+0x4a3/0x770 [ 712.446129][T25125] ? netlink_attachskb+0x810/0x810 [ 712.446130][T25125] ? __alloc_skb+0x4c4/0x5f0 [ 712.446133][T25125] ? napi_skb_cache_get+0x7a0/0x7a0 [ 712.446136][T25125] ? __lock_acquire+0x577/0xc10 [ 712.446139][T25125] netlink_sendmsg+0x735/0xc60 [ 712.446142][T25125] ? netlink_unicast+0x770/0x770 [ 712.446145][T25125] ? __might_fault+0x97/0x140 [ 712.446151][T25125] ____sys_sendmsg+0x419/0x850 [ 712.446153][T25125] ? copy_msghdr_from_user+0x270/0x430 [ 712.446155][T25125] ? get_timestamp.constprop.0+0x390/0x390 [ 712.446157][T25125] ? move_addr_to_kernel+0x40/0x40 [ 712.446161][T25125] ? lock_acquire.part.0+0xbc/0x260 [ 712.446162][T25125] ? find_held_lock+0x2b/0x80 [ 712.446166][T25125] ___sys_sendmsg+0xfd/0x180 [ 712.446168][T25125] ? copy_msghdr_from_user+0x430/0x430 [ 712.446169][T25125] ? __lock_release.isra.0+0x59/0x170 [ 712.446180][T25125] ? lock_vma_under_rcu+0x128/0x3e0 [ 712.446185][T25125] __sys_sendmsg+0x124/0x1c0 [ 712.446188][T25125] ? __sys_sendmsg_sock+0x20/0x20 [ 712.446193][T25125] ? do_user_addr_fault+0x799/0xdb0 [ 712.446197][T25125] ? rcu_is_watching+0x15/0xd0 [ 712.446200][T25125] ? rcu_is_watching+0x15/0xd0 [ 712.446203][T25125] do_syscall_64+0x117/0xfc0 [ 712.446207][T25125] ? exc_page_fault+0xaf/0xd0 [ 712.446210][T25125] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 712.446212][T25125] RIP: 0033:0x7f02654b7c5e [ 712.446216][T25125] Code: 4d 89 d8 e8 34 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 13 ff ff ff 0f 1f 00 f3 0f 1e fa [ 712.446218][T25125] RSP: 002b:00007ffdb54239f0 EFLAGS: 00000202 ORIG_RAX: 000000000000002e [ 712.446220][T25125] RAX: ffffffffffffffda RBX: 000000000048a910 RCX: 00007f02654b7c5e [ 712.446222][T25125] RDX: 0000000000000000 RSI: 00007ffdb5423ab0 RDI: 0000000000000005 [ 712.446223][T25125] RBP: 00007ffdb5423a00 R08: 0000000000000000 R09: 0000000000000000 [ 712.446224][T25125] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 [ 712.446224][T25125] R13: 0000000069a482be R14: 000000003344c310 R15: 000000000049b620 [ 712.446231][T25125] WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr