[ 2118.533260][T22191] mpls_gso: MPLS GSO support [ 2758.758688][T14205] [ 2758.758802][T14205] ============================= [ 2758.758935][T14205] WARNING: suspicious RCU usage [ 2758.759063][T14205] 7.0.0-rc1-virtme #1 Not tainted [ 2758.759189][T14205] ----------------------------- [ 2758.759314][T14205] net/ipv6/ip6_fib.c:111 suspicious rcu_dereference_protected() usage! [ 2758.759509][T14205] [ 2758.759509][T14205] other info that might help us debug this: [ 2758.759509][T14205] [ 2758.759763][T14205] [ 2758.759763][T14205] rcu_scheduler_active = 2, debug_locks = 1 [ 2758.759947][T14205] 1 lock held by ip/14205: [ 2758.760073][T14205] #0: ffffffffad4a1d28 (rtnl_mutex){+.+.}-{4:4}, at: rtm_new_nexthop+0x1a6/0x8c0 [ 2758.760301][T14205] [ 2758.760301][T14205] stack backtrace: [ 2758.760458][T14205] CPU: 3 UID: 0 PID: 14205 Comm: ip Not tainted 7.0.0-rc1-virtme #1 PREEMPT(full) [ 2758.760460][T14205] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 2758.760462][T14205] Call Trace: [ 2758.760464][T14205] [ 2758.760465][T14205] dump_stack_lvl+0x6f/0xa0 [ 2758.760470][T14205] lockdep_rcu_suspicious.cold+0x4f/0xad [ 2758.760478][T14205] fib6_update_sernum+0xfb/0x130 [ 2758.760481][T14205] nh_rt_cache_flush+0x8d/0x380 [ 2758.760485][T14205] replace_nexthop+0x347/0x6e0 [ 2758.760490][T14205] insert_nexthop+0x41e/0x7a0 [ 2758.760494][T14205] rtm_new_nexthop+0x3a0/0x8c0 [ 2758.760497][T14205] ? insert_nexthop+0x7a0/0x7a0 [ 2758.760499][T14205] ? lock_acquire.part.0+0xbc/0x260 [ 2758.760502][T14205] ? find_held_lock+0x2b/0x80 [ 2758.760509][T14205] ? lock_acquire.part.0+0xbc/0x260 [ 2758.760510][T14205] ? find_held_lock+0x2b/0x80 [ 2758.760516][T14205] ? find_held_lock+0x2b/0x80 [ 2758.760518][T14205] ? insert_nexthop+0x7a0/0x7a0 [ 2758.760520][T14205] ? __lock_release.isra.0+0x59/0x170 [ 2758.760523][T14205] ? insert_nexthop+0x7a0/0x7a0 [ 2758.760525][T14205] rtnetlink_rcv_msg+0x6fe/0xb90 [ 2758.760530][T14205] ? rtnl_fdb_dump+0x620/0x620 [ 2758.760532][T14205] ? __lock_acquire+0x577/0xc10 [ 2758.760536][T14205] ? lock_acquire.part.0+0xbc/0x260 [ 2758.760537][T14205] ? find_held_lock+0x2b/0x80 [ 2758.760540][T14205] netlink_rcv_skb+0x123/0x380 [ 2758.760543][T14205] ? rtnl_fdb_dump+0x620/0x620 [ 2758.760546][T14205] ? netlink_ack+0xce0/0xce0 [ 2758.760551][T14205] ? netlink_deliver_tap+0xc5/0x330 [ 2758.760553][T14205] ? netlink_deliver_tap+0x13f/0x330 [ 2758.760558][T14205] netlink_unicast+0x4a3/0x770 [ 2758.760561][T14205] ? netlink_attachskb+0x810/0x810 [ 2758.760562][T14205] ? __alloc_skb+0x4c4/0x5f0 [ 2758.760565][T14205] ? napi_skb_cache_get+0x7a0/0x7a0 [ 2758.760568][T14205] ? __lock_acquire+0x577/0xc10 [ 2758.760570][T14205] netlink_sendmsg+0x735/0xc60 [ 2758.760574][T14205] ? netlink_unicast+0x770/0x770 [ 2758.760577][T14205] ? __might_fault+0x97/0x140 [ 2758.760582][T14205] ____sys_sendmsg+0x419/0x850 [ 2758.760585][T14205] ? copy_msghdr_from_user+0x270/0x430 [ 2758.760586][T14205] ? get_timestamp.constprop.0+0x390/0x390 [ 2758.760588][T14205] ? move_addr_to_kernel+0x40/0x40 [ 2758.760592][T14205] ? lock_acquire.part.0+0xbc/0x260 [ 2758.760593][T14205] ? find_held_lock+0x2b/0x80 [ 2758.760596][T14205] ___sys_sendmsg+0xfd/0x180 [ 2758.760598][T14205] ? copy_msghdr_from_user+0x430/0x430 [ 2758.760599][T14205] ? __lock_release.isra.0+0x59/0x170 [ 2758.760610][T14205] ? lock_vma_under_rcu+0x128/0x3e0 [ 2758.760614][T14205] __sys_sendmsg+0x124/0x1c0 [ 2758.760617][T14205] ? __sys_sendmsg_sock+0x20/0x20 [ 2758.760622][T14205] ? do_user_addr_fault+0x799/0xdb0 [ 2758.760626][T14205] ? rcu_is_watching+0x15/0xd0 [ 2758.760628][T14205] ? rcu_is_watching+0x15/0xd0 [ 2758.760631][T14205] do_syscall_64+0x117/0xfc0 [ 2758.760635][T14205] ? exc_page_fault+0xaf/0xd0 [ 2758.760641][T14205] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 2758.760643][T14205] RIP: 0033:0x7f55fa734c5e [ 2758.760647][T14205] 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 [ 2758.760649][T14205] RSP: 002b:00007fff595e6500 EFLAGS: 00000202 ORIG_RAX: 000000000000002e [ 2758.760651][T14205] RAX: ffffffffffffffda RBX: 000000000048a910 RCX: 00007f55fa734c5e [ 2758.760653][T14205] RDX: 0000000000000000 RSI: 00007fff595e65c0 RDI: 0000000000000005 [ 2758.760654][T14205] RBP: 00007fff595e6510 R08: 0000000000000000 R09: 0000000000000000 [ 2758.760654][T14205] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 [ 2758.760655][T14205] R13: 0000000069a48b91 R14: 0000000019a2c310 R15: 000000000049b620 [ 2758.760661][T14205] WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr