rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P144/1:b..l P1075/1:b..l
(detected by 1, t=10502 jiffies, g=8517, q=30)
task:kworker/0:2 state:R running task stack:25184 pid: 1075 ppid: 2 flags:0x00004000
Workqueue: mld mld_ifc_work
Call Trace:
context_switch kernel/sched/core.c:5027 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6549
preempt_schedule+0xd9/0xe0 kernel/sched/core.c:6574
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
__local_bh_enable_ip+0x175/0x1f0 kernel/softirq.c:390
rcu_read_unlock_bh include/linux/rcupdate.h:809 [inline]
ip6_finish_output2+0x103e/0x15a0 net/ipv6/ip6_output.c:131
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
mld_send_cr net/ipv6/mcast.c:2121 [inline]
mld_ifc_work+0x7d7/0xc90 net/ipv6/mcast.c:2653
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
task:kworker/u4:1 state:R running task stack:19744 pid: 144 ppid: 2 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:5027 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6777
irqentry_exit+0x53/0x80 kernel/entry/common.c:432
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:rcu_is_watching+0x6a/0xa0 kernel/rcu/tree.c:1125
Code: 48 c7 c3 c8 b2 03 00 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 1a 8b 03 65 ff 0d 95 56 97 7e 74 08 24 01 5b 41 5e <41> 5f c3 e8 76 73 95 ff eb f1 89 d9 80 e1 07 80 c1 03 38 c1 7c da
RSP: 0018:ffffc900016efa50 EFLAGS: 00000202
RAX: 0000000000005e01 RBX: 0000000000000001 RCX: ffff8880183f5940
RDX: ffff8880183f5940 RSI: ffffffff8ad900e0 RDI: ffffffff8ad900a0
RBP: ffffc900016efb70 R08: ffffffff88d3271c R09: fffffbfff20e2219
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920002ddf62
R13: 0000000000001fe9 R14: dffffc0000000000 R15: dffffc0000000000
rcu_read_unlock include/linux/rcupdate.h:768 [inline]
inet_twsk_purge+0x8b5/0x9d0 net/ipv4/inet_timewait_sock.c:309
ops_exit_list net/core/net_namespace.c:177 [inline]
cleanup_net+0x763/0xb60 net/core/net_namespace.c:599
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 10541 jiffies! g8517 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:26816 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5027 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
schedule+0x11b/0x1f0 kernel/sched/core.c:6456
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:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 154 Comm: kworker/u4:2 Not tainted 5.15.166-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: events_unbound linkwatch_event
RIP: 0010:cmpxchg_double_slab+0x11f/0x270 mm/slub.c:505
Code: 02 00 00 0f 84 89 00 00 00 fb e9 83 00 00 00 41 8d 46 20 a8 0f 0f 85 2b 01 00 00 4c 89 f9 4c 89 e2 4c 89 e8 f0 49 0f c7 4e 20 01 74 64 eb 5e 49 f7 46 08 01 00 00 00 0f 85 0a 01 00 00 49 8b
RSP: 0018:ffffc90002007100 EFLAGS: 00000246
RAX: ffff888064ec9080 RBX: ffff888064ec9100 RCX: 000000000020001e
RDX: 000000000020001f RSI: ffffea000193b240 RDI: ffff888017041640
RBP: 000000000020001e R08: ffff888064ec9100 R09: 000000000020001e
R10: 0000000000000000 R11: dffffc0000000001 R12: 000000000020001f
R13: ffff888064ec9080 R14: ffffea000193b240 R15: 000000000020001e
FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560202538030 CR3: 0000000064e50000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__slab_free+0x69/0x250 mm/slub.c:3350
do_slab_free mm/slub.c:3487 [inline]
___cache_free+0xe3/0x100 mm/slub.c:3506
qlist_free_all+0x36/0x90 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x162/0x180 mm/kasan/quarantine.c:283
____kasan_kmalloc+0x2f/0xf0 mm/kasan/common.c:479
kasan_kmalloc include/linux/kasan.h:264 [inline]
__kmalloc+0x168/0x300 mm/slub.c:4407
kmalloc include/linux/slab.h:596 [inline]
kzalloc include/linux/slab.h:721 [inline]
fib6_info_alloc+0x2c/0xd0 net/ipv6/ip6_fib.c:155
ip6_route_info_create+0x446/0x12c0 net/ipv6/route.c:3775
ip6_route_add+0x22/0x120 net/ipv6/route.c:3869
addrconf_add_mroute net/ipv6/addrconf.c:2511 [inline]
addrconf_add_dev+0x34c/0x520 net/ipv6/addrconf.c:2529
addrconf_dev_config net/ipv6/addrconf.c:3409 [inline]
addrconf_init_auto_addrs+0x879/0xe90 net/ipv6/addrconf.c:3496
addrconf_notify+0xa90/0xf30 net/ipv6/addrconf.c:3665
notifier_call_chain kernel/notifier.c:83 [inline]
raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391
call_netdevice_notifiers_info net/core/dev.c:2018 [inline]
netdev_state_change+0x1a3/0x250 net/core/dev.c:1409
linkwatch_do_dev+0x10c/0x160 net/core/link_watch.c:167
__linkwatch_run_queue+0x4ca/0x7f0 net/core/link_watch.c:213
linkwatch_event+0x48/0x50 net/core/link_watch.c:252
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
process_scheduled_works kernel/workqueue.c:2373 [inline]
worker_thread+0xdcf/0x1280 kernel/workqueue.c:2459
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287