rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P3627/1:b..l
(detected by 0, t=10503 jiffies, g=4793, q=157)
task:kworker/1:7 state:R running task stack:22784 pid: 3627 ppid: 2 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6780
irqentry_exit+0x53/0x80 kernel/entry/common.c:432
asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:643
RIP: 0010:fib_rules_lookup+0x0/0xcb0 net/core/fib_rules.c:294
Code: 41 5d 41 5e 41 5f 5d e9 4e 0f 10 f9 e8 69 31 25 f9 4d 85 e4 75 cf e8 5f 31 25 f9 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec c0 00
RSP: 0018:ffffc90002fe7498 EFLAGS: 00000246
RAX: 1ffff11002a324c3 RBX: ffff888015192618 RCX: ffffc90002fe7500
RDX: 0000000000000000 RSI: ffffc90002fe7550 RDI: ffff88813fe5fd00
RBP: ffffc90002fe7630 R08: dffffc0000000000 R09: fffffbfff1bd2986
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920005fce9c
R13: ffffc90002fe7554 R14: ffffc90002fe7500 R15: dffffc0000000000
ip6mr_fib_lookup net/ipv6/ip6mr.c:145 [inline]
mroute6_is_socket+0x2aa/0x460 net/ipv6/ip6mr.c:1619
ip6_finish_output2+0x326/0x14f0 net/ipv6/ip6_output.c:83
dst_output include/net/dst.h:443 [inline]
NF_HOOK+0x166/0x4f0 include/linux/netfilter.h:302
mld_sendpack+0x70e/0xc10 net/ipv6/mcast.c:1820
ipv6_mc_dad_complete+0x84/0x390 net/ipv6/mcast.c:2247
addrconf_dad_completed+0x6ff/0xc40 net/ipv6/addrconf.c:4257
addrconf_dad_work+0xdd0/0x1720
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
rcu: rcu_preempt kthread starved for 10529 jiffies! g4793 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:27064 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
schedule+0x11b/0x1f0 kernel/sched/core.c:6459
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914
rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972
rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 3693 Comm: syz.0.16 Not tainted 5.15.164-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
rcu_check_gp_kthread_starvation+0x1d2/0x240 kernel/rcu/tree_stall.h:487
print_other_cpu_stall+0x137a/0x14d0 kernel/rcu/tree_stall.h:592
check_cpu_stall kernel/rcu/tree_stall.h:745 [inline]
rcu_pending kernel/rcu/tree.c:3932 [inline]
rcu_sched_clock_irq+0xa38/0x1150 kernel/rcu/tree.c:2619
update_process_times+0x196/0x200 kernel/time/timer.c:1818
tick_sched_handle kernel/time/tick-sched.c:254 [inline]
tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1473
__run_hrtimer kernel/time/hrtimer.c:1686 [inline]
__hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1750
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
__sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__syscall_enter_from_user_work kernel/entry/common.c:93 [inline]
RIP: 0010:syscall_enter_from_user_mode+0x37/0x240 kernel/entry/common.c:114
Code: 49 89 fe 48 8b 7c 24 30 e8 46 f6 ff ff e9 8d 01 00 00 e9 91 01 00 00 e8 57 cb 53 f7 e8 42 c9 53 f7 fb 65 4c 8b 3d 29 57 cf 75 <49> 8b 5f 08 f6 c3 3f 0f 84 ce 00 00 00 f6 c3 20 74 17 4c 89 f7 e8
RSP: 0018:ffffc900043bfef8 EFLAGS: 00000282
RAX: 414ed6cc4ab7a600 RBX: ffffc900043bff30 RCX: ffffffff91467f03
RDX: dffffc0000000000 RSI: ffffffff8a8b2a00 RDI: ffffffff8ad8f800
RBP: ffffc900043bff48 R08: ffffffff8186e200 R09: fffffbfff1bd2986
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000027 R14: ffffc900043bff58 R15: ffff88807a6f0000
do_syscall_64+0x1e/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7ff84ed142e7
Code: 0b e9 68 fe ff ff 48 83 c4 18 48 8d 3d b2 e5 cc 00 5b 5d 41 5c 41 5d 41 5e 41 5f e9 43 f5 fb ff 0f 1f 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 66 00 00 00 0f 05 c3 0f 1f 84 00 00
RSP: 002b:00007ff84d19bb08 EFLAGS: 00000202 ORIG_RAX: 0000000000000027
RAX: ffffffffffffffda RBX: 00007ff84d19bc70 RCX: 00007ff84ed142e7
RDX: 00007ff84d19bb40 RSI: 00007ff84d19bc70 RDI: 0000000000000021
RBP: 0000000000000000 R08: 00007ff84d19c6c0 R09: 00007ff84d19c6c0
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ff84eeabf8c
R13: 000000000000000b R14: 00007ffdad95ccd0 R15: 00007ffdad95cdb8