[ 13.972059][ T248] ip (248) used greatest stack depth: 24056 bytes left [ 20.501314][ T324] [ 20.501651][ T324] ============================= [ 20.501943][ T324] WARNING: suspicious RCU usage [ 20.502241][ T324] 6.15.0-rc5-virtme #1 Not tainted [ 20.502540][ T324] ----------------------------- [ 20.502854][ T324] ./include/net/addrconf.h:347 suspicious rcu_dereference_check() usage! [ 20.503316][ T324] [ 20.503316][ T324] other info that might help us debug this: [ 20.503316][ T324] [ 20.504169][ T324] [ 20.504169][ T324] rcu_scheduler_active = 2, debug_locks = 1 [ 20.504585][ T324] 1 lock held by ip/324: [ 20.504821][ T324] #0: ffff88800903e230 (&tb->tb6_lock){+...}-{3:3}, at: ip6_route_multipath_add+0x743/0x1450 [ 20.505405][ T324] [ 20.505405][ T324] stack backtrace: [ 20.505791][ T324] CPU: 2 UID: 0 PID: 324 Comm: ip Not tainted 6.15.0-rc5-virtme #1 PREEMPT(full) [ 20.505796][ T324] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 20.505798][ T324] Call Trace: [ 20.505800][ T324] [ 20.505803][ T324] dump_stack_lvl+0xb0/0xd0 [ 20.505813][ T324] lockdep_rcu_suspicious+0x166/0x270 [ 20.505825][ T324] rt6_multipath_rebalance.part.0+0x70c/0x8a0 [ 20.505834][ T324] fib6_add_rt2node+0xa36/0x2c00 [ 20.505837][ T324] ? lockdep_hardirqs_on+0x7c/0x110 [ 20.505844][ T324] ? _raw_spin_unlock_irqrestore+0x46/0x80 [ 20.505859][ T324] ? __pfx_fib6_add_rt2node+0x10/0x10 [ 20.505862][ T324] ? fib6_add_1.constprop.0+0x486/0x15e0 [ 20.505874][ T324] fib6_add+0x38d/0xec0 [ 20.505881][ T324] ? do_raw_spin_lock+0x130/0x270 [ 20.505886][ T324] ? __pfx_fib6_add+0x10/0x10 [ 20.505888][ T324] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 20.505892][ T324] ? lock_acquire+0x10c/0x170 [ 20.505895][ T324] ? ip6_route_multipath_add+0x743/0x1450 [ 20.505904][ T324] ip6_route_multipath_add+0x75b/0x1450 [ 20.505918][ T324] ? __pfx_ip6_route_multipath_add+0x10/0x10 [ 20.505948][ T324] ? __pfx_inet6_rtm_newroute+0x10/0x10 [ 20.505952][ T324] ? __pfx_inet6_rtm_newroute+0x10/0x10 [ 20.505957][ T324] inet6_rtm_newroute+0xb2/0x120 [ 20.505961][ T324] ? __pfx_inet6_rtm_newroute+0x10/0x10 [ 20.505980][ T324] ? rtnetlink_rcv_msg+0x6ed/0xc00 [ 20.505986][ T324] ? __lock_release+0x5d/0x170 [ 20.505992][ T324] ? rtnetlink_rcv_msg+0x6ed/0xc00 [ 20.505997][ T324] rtnetlink_rcv_msg+0x710/0xc00 [ 20.506003][ T324] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 20.506005][ T324] ? validate_chain+0x166/0x4d0 [ 20.506021][ T324] netlink_rcv_skb+0x12f/0x360 [ 20.506028][ T324] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 20.506034][ T324] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 20.506038][ T324] ? __lock_acquire+0x591/0x9d0 [ 20.506051][ T324] ? netlink_deliver_tap+0x13e/0x340 [ 20.506054][ T324] ? __lock_release+0x5d/0x170 [ 20.506060][ T324] ? netlink_deliver_tap+0x13e/0x340 [ 20.506063][ T324] ? netlink_deliver_tap+0xc3/0x340 [ 20.506071][ T324] netlink_unicast+0x449/0x710 [ 20.506079][ T324] ? __pfx_netlink_unicast+0x10/0x10 [ 20.506083][ T324] ? __lock_acquire+0x591/0x9d0 [ 20.506093][ T324] netlink_sendmsg+0x721/0xbe0 [ 20.506102][ T324] ? __pfx_netlink_sendmsg+0x10/0x10 [ 20.506108][ T324] ? __import_iovec+0x238/0x3c0 [ 20.506120][ T324] ____sys_sendmsg+0x7aa/0xa10 [ 20.506128][ T324] ? __pfx_____sys_sendmsg+0x10/0x10 [ 20.506131][ T324] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 20.506146][ T324] ___sys_sendmsg+0xed/0x170 [ 20.506149][ T324] ? kasan_record_aux_stack+0x8c/0xa0 [ 20.506157][ T324] ? __call_rcu_common.constprop.0+0xa1/0x610 [ 20.506166][ T324] ? __pfx____sys_sendmsg+0x10/0x10 [ 20.506174][ T324] ? find_held_lock+0x2b/0x80 [ 20.506184][ T324] ? __lock_acquire+0x591/0x9d0 [ 20.506194][ T324] ? find_held_lock+0x2b/0x80 [ 20.506199][ T324] ? __virt_addr_valid+0x22e/0x450 [ 20.506206][ T324] ? __lock_release+0x5d/0x170 [ 20.506218][ T324] __sys_sendmsg+0x108/0x1a0 [ 20.506223][ T324] ? __pfx___sys_sendmsg+0x10/0x10 [ 20.506239][ T324] ? rcu_is_watching+0x12/0xc0 [ 20.506247][ T324] do_syscall_64+0xc1/0x1d0 [ 20.506255][ T324] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 20.506259][ T324] RIP: 0033:0x7f1a7036c9a7 [ 20.506264][ T324] 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 [ 20.506266][ T324] RSP: 002b:00007ffcaa877d88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 20.506270][ T324] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f1a7036c9a7 [ 20.506272][ T324] RDX: 0000000000000000 RSI: 00007ffcaa877df0 RDI: 0000000000000005 [ 20.506274][ T324] RBP: 00007ffcaa87813c R08: 0000000000000038 R09: 0000000000000000 [ 20.506276][ T324] R10: 00000000045ed910 R11: 0000000000000246 R12: 00007ffcaa879100 [ 20.506278][ T324] R13: 0000000068255c48 R14: 0000000000498600 R15: 00007ffcaa87a991 [ 20.506292][ T324] [ 43.002633][ C2] clocksource: Long readout interval, skipping watchdog check: cs_nsec: 1520981175 wd_nsec: 1520980249 WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr