[ 461.006108][ T4448] [ 461.006390][ T4448] ============================= [ 461.006673][ T4448] WARNING: suspicious RCU usage [ 461.006946][ T4448] 6.15.0-rc5-virtme #1 Not tainted [ 461.007219][ T4448] ----------------------------- [ 461.007501][ T4448] ./include/net/addrconf.h:347 suspicious rcu_dereference_check() usage! [ 461.007902][ T4448] [ 461.007902][ T4448] other info that might help us debug this: [ 461.007902][ T4448] [ 461.008424][ T4448] [ 461.008424][ T4448] rcu_scheduler_active = 2, debug_locks = 1 [ 461.008828][ T4448] 1 lock held by ip/4448: [ 461.009036][ T4448] #0: ffff888009897430 (&tb->tb6_lock){+...}-{3:3}, at: ip6_route_multipath_add+0x743/0x1450 [ 461.009597][ T4448] [ 461.009597][ T4448] stack backtrace: [ 461.010030][ T4448] CPU: 1 UID: 0 PID: 4448 Comm: ip Not tainted 6.15.0-rc5-virtme #1 PREEMPT(full) [ 461.010035][ T4448] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 461.010037][ T4448] Call Trace: [ 461.010039][ T4448] [ 461.010042][ T4448] dump_stack_lvl+0xb0/0xd0 [ 461.010050][ T4448] lockdep_rcu_suspicious+0x166/0x270 [ 461.010060][ T4448] rt6_multipath_rebalance.part.0+0x70c/0x8a0 [ 461.010068][ T4448] fib6_add_rt2node+0xa36/0x2c00 [ 461.010072][ T4448] ? lockdep_hardirqs_on+0x7c/0x110 [ 461.010076][ T4448] ? _raw_spin_unlock_irqrestore+0x46/0x80 [ 461.010090][ T4448] ? __pfx_fib6_add_rt2node+0x10/0x10 [ 461.010093][ T4448] ? fib6_add_1.constprop.0+0x486/0x15e0 [ 461.010106][ T4448] fib6_add+0x38d/0xec0 [ 461.010113][ T4448] ? do_raw_spin_lock+0x130/0x270 [ 461.010117][ T4448] ? __pfx_fib6_add+0x10/0x10 [ 461.010120][ T4448] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 461.010124][ T4448] ? lock_acquire+0x10c/0x170 [ 461.010127][ T4448] ? ip6_route_multipath_add+0x743/0x1450 [ 461.010136][ T4448] ip6_route_multipath_add+0x75b/0x1450 [ 461.010150][ T4448] ? __pfx_ip6_route_multipath_add+0x10/0x10 [ 461.010179][ T4448] ? __pfx_inet6_rtm_newroute+0x10/0x10 [ 461.010183][ T4448] ? __pfx_inet6_rtm_newroute+0x10/0x10 [ 461.010189][ T4448] inet6_rtm_newroute+0xb2/0x120 [ 461.010193][ T4448] ? __pfx_inet6_rtm_newroute+0x10/0x10 [ 461.010212][ T4448] ? rtnetlink_rcv_msg+0x6ed/0xc00 [ 461.010216][ T4448] ? __lock_release+0x5d/0x170 [ 461.010222][ T4448] ? rtnetlink_rcv_msg+0x6ed/0xc00 [ 461.010227][ T4448] rtnetlink_rcv_msg+0x710/0xc00 [ 461.010233][ T4448] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 461.010235][ T4448] ? validate_chain+0x166/0x4d0 [ 461.010251][ T4448] netlink_rcv_skb+0x12f/0x360 [ 461.010257][ T4448] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 461.010263][ T4448] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 461.010267][ T4448] ? __lock_acquire+0x591/0x9d0 [ 461.010280][ T4448] ? netlink_deliver_tap+0x13e/0x340 [ 461.010283][ T4448] ? __lock_release+0x5d/0x170 [ 461.010289][ T4448] ? netlink_deliver_tap+0x13e/0x340 [ 461.010292][ T4448] ? netlink_deliver_tap+0xc3/0x340 [ 461.010299][ T4448] netlink_unicast+0x449/0x710 [ 461.010307][ T4448] ? __pfx_netlink_unicast+0x10/0x10 [ 461.010311][ T4448] ? __lock_acquire+0x591/0x9d0 [ 461.010321][ T4448] netlink_sendmsg+0x721/0xbe0 [ 461.010330][ T4448] ? __pfx_netlink_sendmsg+0x10/0x10 [ 461.010335][ T4448] ? __import_iovec+0x238/0x3c0 [ 461.010347][ T4448] ____sys_sendmsg+0x7aa/0xa10 [ 461.010354][ T4448] ? __pfx_____sys_sendmsg+0x10/0x10 [ 461.010357][ T4448] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 461.010372][ T4448] ___sys_sendmsg+0xed/0x170 [ 461.010375][ T4448] ? kasan_record_aux_stack+0x8c/0xa0 [ 461.010381][ T4448] ? __call_rcu_common.constprop.0+0xa1/0x610 [ 461.010388][ T4448] ? __pfx____sys_sendmsg+0x10/0x10 [ 461.010396][ T4448] ? find_held_lock+0x2b/0x80 [ 461.010405][ T4448] ? __lock_acquire+0x591/0x9d0 [ 461.010415][ T4448] ? find_held_lock+0x2b/0x80 [ 461.010420][ T4448] ? __virt_addr_valid+0x22e/0x450 [ 461.010425][ T4448] ? __lock_release+0x5d/0x170 [ 461.010438][ T4448] __sys_sendmsg+0x108/0x1a0 [ 461.010444][ T4448] ? __pfx___sys_sendmsg+0x10/0x10 [ 461.010460][ T4448] ? rcu_is_watching+0x12/0xc0 [ 461.010467][ T4448] do_syscall_64+0xc1/0x1d0 [ 461.010473][ T4448] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 461.010477][ T4448] RIP: 0033:0x7f2680a619a7 [ 461.010482][ T4448] 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 [ 461.010484][ T4448] RSP: 002b:00007ffd62cdab28 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 461.010488][ T4448] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f2680a619a7 [ 461.010490][ T4448] RDX: 0000000000000000 RSI: 00007ffd62cdab90 RDI: 0000000000000005 [ 461.010492][ T4448] RBP: 00007ffd62cdaedc R08: 0000000000000038 R09: 0000000000000000 [ 461.010494][ T4448] R10: 0000000016258910 R11: 0000000000000246 R12: 00007ffd62cdbea0 [ 461.010495][ T4448] R13: 00000000682589b3 R14: 0000000000498600 R15: 00007ffd62cde991 [ 461.010510][ T4448] [ 526.000366][ C1] clocksource: Long readout interval, skipping watchdog check: cs_nsec: 1036815604 wd_nsec: 1036815244 WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr