[ 1941.119961][T17261] 
[ 1941.120376][T17261] =============================
[ 1941.121091][T17261] WARNING: suspicious RCU usage
[ 1941.121414][T17261] 6.15.0-rc5-virtme #1 Not tainted
[ 1941.121700][T17261] -----------------------------
[ 1941.121986][T17261] ./include/net/addrconf.h:347 suspicious rcu_dereference_check() usage!
[ 1941.122502][T17261] 
[ 1941.122502][T17261] other info that might help us debug this:
[ 1941.122502][T17261] 
[ 1941.123037][T17261] 
[ 1941.123037][T17261] rcu_scheduler_active = 2, debug_locks = 1
[ 1941.123459][T17261] 1 lock held by ip/17261:
[ 1941.123736][T17261]  #0: ffff88800dbfd030 (&tb->tb6_lock){+...}-{3:3}, at: ip6_route_multipath_add+0x743/0x1450
[ 1941.124340][T17261] 
[ 1941.124340][T17261] stack backtrace:
[ 1941.124701][T17261] CPU: 2 UID: 0 PID: 17261 Comm: ip Not tainted 6.15.0-rc5-virtme #1 PREEMPT(full) 
[ 1941.124707][T17261] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1941.124709][T17261] Call Trace:
[ 1941.124712][T17261]  <TASK>
[ 1941.124714][T17261]  dump_stack_lvl+0xb0/0xd0
[ 1941.124729][T17261]  lockdep_rcu_suspicious+0x166/0x270
[ 1941.124741][T17261]  rt6_multipath_rebalance.part.0+0x70c/0x8a0
[ 1941.124752][T17261]  fib6_add_rt2node+0xa36/0x2c00
[ 1941.124756][T17261]  ? lockdep_hardirqs_on+0x7c/0x110
[ 1941.124762][T17261]  ? _raw_spin_unlock_irqrestore+0x46/0x80
[ 1941.124778][T17261]  ? __pfx_fib6_add_rt2node+0x10/0x10
[ 1941.124781][T17261]  ? fib6_add_1.constprop.0+0x486/0x15e0
[ 1941.124794][T17261]  fib6_add+0x38d/0xec0
[ 1941.124803][T17261]  ? do_raw_spin_lock+0x130/0x270
[ 1941.124809][T17261]  ? __pfx_fib6_add+0x10/0x10
[ 1941.124811][T17261]  ? __pfx_do_raw_spin_lock+0x10/0x10
[ 1941.124816][T17261]  ? lock_acquire+0x10c/0x170
[ 1941.124819][T17261]  ? ip6_route_multipath_add+0x743/0x1450
[ 1941.124828][T17261]  ip6_route_multipath_add+0x75b/0x1450
[ 1941.124843][T17261]  ? __pfx_ip6_route_multipath_add+0x10/0x10
[ 1941.124873][T17261]  ? __pfx_inet6_rtm_newroute+0x10/0x10
[ 1941.124876][T17261]  ? __pfx_inet6_rtm_newroute+0x10/0x10
[ 1941.124882][T17261]  inet6_rtm_newroute+0xb2/0x120
[ 1941.124887][T17261]  ? __pfx_inet6_rtm_newroute+0x10/0x10
[ 1941.124905][T17261]  ? rtnetlink_rcv_msg+0x6ed/0xc00
[ 1941.124912][T17261]  ? __lock_release+0x5d/0x170
[ 1941.124918][T17261]  ? rtnetlink_rcv_msg+0x6ed/0xc00
[ 1941.124923][T17261]  rtnetlink_rcv_msg+0x710/0xc00
[ 1941.124930][T17261]  ? __pfx_rtnetlink_rcv_msg+0x10/0x10
[ 1941.124932][T17261]  ? validate_chain+0x166/0x4d0
[ 1941.124948][T17261]  netlink_rcv_skb+0x12f/0x360
[ 1941.124958][T17261]  ? __pfx_rtnetlink_rcv_msg+0x10/0x10
[ 1941.124964][T17261]  ? __pfx_netlink_rcv_skb+0x10/0x10
[ 1941.124969][T17261]  ? __lock_acquire+0x591/0x9d0
[ 1941.124982][T17261]  ? netlink_deliver_tap+0x13e/0x340
[ 1941.124985][T17261]  ? __lock_release+0x5d/0x170
[ 1941.124991][T17261]  ? netlink_deliver_tap+0x13e/0x340
[ 1941.124995][T17261]  ? netlink_deliver_tap+0xc3/0x340
[ 1941.125002][T17261]  netlink_unicast+0x449/0x710
[ 1941.125010][T17261]  ? __pfx_netlink_unicast+0x10/0x10
[ 1941.125014][T17261]  ? __lock_acquire+0x591/0x9d0
[ 1941.125025][T17261]  netlink_sendmsg+0x721/0xbe0
[ 1941.125033][T17261]  ? __pfx_netlink_sendmsg+0x10/0x10
[ 1941.125040][T17261]  ? __import_iovec+0x238/0x3c0
[ 1941.125054][T17261]  ____sys_sendmsg+0x7aa/0xa10
[ 1941.125062][T17261]  ? __pfx_____sys_sendmsg+0x10/0x10
[ 1941.125065][T17261]  ? __pfx_copy_msghdr_from_user+0x10/0x10
[ 1941.125081][T17261]  ___sys_sendmsg+0xed/0x170
[ 1941.125084][T17261]  ? kasan_record_aux_stack+0x8c/0xa0
[ 1941.125092][T17261]  ? __call_rcu_common.constprop.0+0xa1/0x610
[ 1941.125100][T17261]  ? __pfx____sys_sendmsg+0x10/0x10
[ 1941.125109][T17261]  ? find_held_lock+0x2b/0x80
[ 1941.125119][T17261]  ? __lock_acquire+0x591/0x9d0
[ 1941.125129][T17261]  ? find_held_lock+0x2b/0x80
[ 1941.125135][T17261]  ? __virt_addr_valid+0x22e/0x450
[ 1941.125142][T17261]  ? __lock_release+0x5d/0x170
[ 1941.125155][T17261]  __sys_sendmsg+0x108/0x1a0
[ 1941.125159][T17261]  ? __pfx___sys_sendmsg+0x10/0x10
[ 1941.125176][T17261]  ? rcu_is_watching+0x12/0xc0
[ 1941.125184][T17261]  do_syscall_64+0xc1/0x1d0
[ 1941.125192][T17261]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 1941.125197][T17261] RIP: 0033:0x7f88e19259a7
[ 1941.125202][T17261] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
[ 1941.125206][T17261] RSP: 002b:00007ffd725e8a88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[ 1941.125211][T17261] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f88e19259a7
[ 1941.125214][T17261] RDX: 0000000000000000 RSI: 00007ffd725e8af0 RDI: 0000000000000005
[ 1941.125217][T17261] RBP: 00007ffd725e8e3c R08: 0000000000000038 R09: 0000000000000000
[ 1941.125220][T17261] R10: 000000000f087910 R11: 0000000000000246 R12: 00007ffd725e9e00
[ 1941.125223][T17261] R13: 0000000068258d93 R14: 0000000000498600 R15: 00007ffd725ec99b
[ 1941.125242][T17261]  </TASK>