rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P9827/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=41021, q=409 ncpus=2)
task:syz.9.782 state:R running task stack:24128 pid:9827 tgid:9827 ppid:6783 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6756
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7078
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_release+0x658/0xa30 kernel/locking/lockdep.c:5874
Code: 3c 3b 00 74 08 4c 89 f7 e8 75 f7 8a 00 f6 84 24 91 00 00 00 02 75 77 41 f7 c5 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 27 00 00 00 00 4b c7 44 27 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc9000492f340 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000925e7a RCX: ffffc9000492f303
RDX: 0000000000000001 RSI: ffffffff8c0aa960 RDI: ffffffff8c5fad60
RBP: ffffc9000492f470 R08: ffffffff90197ab7 R09: 1ffffffff2032f56
R10: dffffc0000000000 R11: fffffbfff2032f57 R12: 1ffff92000925e74
R13: 0000000000000246 R14: ffffc9000492f3d0 R15: dffffc0000000000
rcu_lock_release include/linux/rcupdate.h:347 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
page_ext_put+0xa3/0xc0 mm/page_ext.c:550
page_table_check_free include/linux/page_table_check.h:41 [inline]
free_pages_prepare mm/page_alloc.c:1128 [inline]
free_unref_page+0xd53/0x1010 mm/page_alloc.c:2657
discard_slab mm/slub.c:2688 [inline]
__put_partials+0x160/0x1c0 mm/slub.c:3157
put_cpu_partial+0x17c/0x250 mm/slub.c:3232
__slab_free+0x290/0x380 mm/slub.c:4483
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
__kasan_kmalloc+0x23/0xb0 mm/kasan/common.c:385
kasan_kmalloc include/linux/kasan.h:260 [inline]
__kmalloc_cache_node_noprof+0x25d/0x3a0 mm/slub.c:4341
kmalloc_node_noprof include/linux/slab.h:924 [inline]
__get_vm_area_node+0x132/0x2d0 mm/vmalloc.c:3127
__vmalloc_node_range_noprof+0x344/0x1380 mm/vmalloc.c:3804
alloc_thread_stack_node kernel/fork.c:314 [inline]
dup_task_struct+0x444/0x8c0 kernel/fork.c:1121
copy_process+0x5d1/0x3d50 kernel/fork.c:2225
kernel_clone+0x226/0x8e0 kernel/fork.c:2807
__do_sys_clone3 kernel/fork.c:3111 [inline]
__se_sys_clone3+0x2d8/0x360 kernel/fork.c:3090
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1f2adba589
RSP: 002b:00007fffcb5c4938 EFLAGS: 00000206 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007f1f2ad3c9a0 RCX: 00007f1f2adba589
RDX: 00007f1f2ad3c9a0 RSI: 0000000000000058 RDI: 00007fffcb5c4980
RBP: 00007f1f2bc3c6c0 R08: 00007f1f2bc3c6c0 R09: 00007fffcb5c4a67
R10: 0000000000000008 R11: 0000000000000206 R12: ffffffffffffffa8
R13: 000000000000006e R14: 00007fffcb5c4980 R15: 00007fffcb5c4a68
rcu: rcu_preempt kthread starved for 3790 jiffies! g41021 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:26264 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5889 Comm: kworker/0:4 Not tainted 6.13.0-rc3-syzkaller-00062-gc061cf420ded #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
Workqueue: wg-crypt-wg2 wg_packet_decrypt_worker
RIP: 0010:lockdep_hardirqs_on_prepare+0x77/0x780 kernel/locking/lockdep.c:4360
Code: 7a 81 4c 8d 7c 24 20 49 c1 ef 03 48 b8 f1 f1 f1 f1 00 f3 f3 f3 49 89 04 17 48 c7 c0 50 ad 19 90 48 c1 e8 03 0f b6 04 10 84 c0 <0f> 85 57 05 00 00 83 3d 3c 3c 9f 0e 00 0f 84 d4 03 00 00 65 8b 05
RSP: 0018:ffffc90000006e20 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88814d1741f0 RCX: ffffffff81a72bdc
RDX: dffffc0000000000 RSI: ffffffff8c5fad40 RDI: ffffffff8c5fad00
RBP: ffffc90000006ec8 R08: ffffffff90197ab7 R09: 1ffffffff2032f56
R10: dffffc0000000000 R11: fffffbfff2032f57 R12: 0000000000000200
R13: ffffffff89ea48d4 R14: ffff88814d1741e8 R15: 1ffff92000000dc8
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3211bffc CR3: 000000000e736000 CR4: 0000000000350ef0
Call Trace:
trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:78
seqcount_lockdep_reader_access include/linux/seqlock.h:74 [inline]
read_seqbegin include/linux/seqlock.h:813 [inline]
neigh_hh_output include/net/neighbour.h:493 [inline]
neigh_output include/net/neighbour.h:537 [inline]
ip_finish_output2+0x86b/0x1390 net/ipv4/ip_output.c:236
synproxy_send_client_synack+0x8a4/0xe20 net/netfilter/nf_synproxy_core.c:484
nft_synproxy_eval_v4+0x3ca/0x610 net/netfilter/nft_synproxy.c:59
nft_synproxy_do_eval+0x362/0xa60 net/netfilter/nft_synproxy.c:141
expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline]
nft_do_chain+0x4af/0x1da0 net/netfilter/nf_tables_core.c:288
nft_do_chain_inet+0x418/0x6b0 net/netfilter/nft_chain_filter.c:161
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:626
nf_hook include/linux/netfilter.h:269 [inline]
NF_HOOK+0x29e/0x450 include/linux/netfilter.h:312
NF_HOOK+0x3a6/0x450 include/linux/netfilter.h:314
__netif_receive_skb_one_core net/core/dev.c:5672 [inline]
__netif_receive_skb+0x2bf/0x650 net/core/dev.c:5785
process_backlog+0x662/0x15b0 net/core/dev.c:6117
__napi_poll+0xcd/0x490 net/core/dev.c:6883
napi_poll net/core/dev.c:6952 [inline]
net_rx_action+0x89b/0x1240 net/core/dev.c:7074
handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:561
do_softirq+0x11b/0x1e0 kernel/softirq.c:462
__local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:389
spin_unlock_bh include/linux/spinlock.h:396 [inline]
ptr_ring_consume_bh include/linux/ptr_ring.h:367 [inline]
wg_packet_decrypt_worker+0xcde/0xd80 drivers/net/wireguard/receive.c:499
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa68/0x1840 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244