rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P7460/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=18901, q=899 ncpus=2)
task:syz-executor state:R running task stack:23680 pid:7460 tgid:7460 ppid:5823 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5371 [inline]
__schedule+0x18f6/0x4cd0 kernel/sched/core.c:6758
preempt_schedule_notrace+0x100/0x140 kernel/sched/core.c:7030
preempt_schedule_notrace_thunk+0x1a/0x30 arch/x86/entry/thunk.S:13
rcu_is_watching+0x7e/0xb0 kernel/rcu/tree.c:717
rcu_read_unlock include/linux/rcupdate.h:878 [inline]
page_ext_put+0x2f/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_frozen_pages+0xe21/0x10e0 mm/page_alloc.c:2660
__slab_free+0x2c2/0x380 mm/slub.c:4520
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_slab_alloc+0x23/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4115 [inline]
slab_alloc_node mm/slub.c:4164 [inline]
kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4171
vm_area_alloc+0x24/0x140 kernel/fork.c:443
__mmap_new_vma mm/vma.c:2338 [inline]
__mmap_region mm/vma.c:2454 [inline]
mmap_region+0x1aed/0x2e40 mm/vma.c:2532
do_mmap+0xecc/0x13a0 mm/mmap.c:561
vm_mmap_pgoff+0x214/0x430 mm/util.c:575
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: 0033:0x7f8fae585d63
RSP: 002b:00007fffbb9641b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f8fae776038 RCX: 00007f8fae585d63
RDX: 0000000000000000 RSI: 0000000000402000 RDI: 0000000000000000
RBP: 00007f8fae776038 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000000022 R11: 0000000000000246 R12: 0000000000000008
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000
rcu: rcu_preempt kthread starved for 10533 jiffies! g18901 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:25592 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5371 [inline]
__schedule+0x18f6/0x4cd0 kernel/sched/core.c:6758
__schedule_loop kernel/sched/core.c:6835 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6850
schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2024
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2226
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 25 Comm: kworker/1:0 Not tainted 6.13.0-rc6-next-20250107-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_power_efficient wg_ratelimiter_gc_entries
RIP: 0010:rdtsc_ordered arch/x86/include/asm/msr.h:217 [inline]
RIP: 0010:read_tsc+0xc/0x20 arch/x86/kernel/tsc.c:1132
Code: c0 03 e9 a6 fd ff ff e8 82 4d 92 0a 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa e8 e7 2a 5f 00 0f 01 f9 <66> 90 48 c1 e2 20 48 09 d0 c3 cc cc cc cc 66 0f 1f 44 00 00 90 90
RSP: 0018:ffffc90000a18058 EFLAGS: 00000006
RAX: 0000000051f6ee74 RBX: ffffffff8e76e060 RCX: 0000000000000001
RDX: 00000000000000e3 RSI: 0000000000000000 RDI: ffffffff8e76e060
RBP: 0000000000000003 R08: ffffffff81acef12 R09: 1ffffffff203593e
R10: dffffc0000000000 R11: ffffffff81600e70 R12: 0000000000014fec
R13: 0000006611217c1d R14: dffffc0000000000 R15: ffff8880b8728340
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb98ad47ab8 CR3: 000000000e736000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
tk_clock_read kernel/time/timekeeping.c:226 [inline]
timekeeping_get_ns kernel/time/timekeeping.c:335 [inline]
ktime_get+0x90/0x200 kernel/time/timekeeping.c:813
clockevents_program_event+0xe6/0x350 kernel/time/clockevents.c:326
hrtimer_interrupt+0x5b7/0xa40 kernel/time/hrtimer.c:1878
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:ether_addr_equal_64bits include/linux/etherdevice.h:389 [inline]
RIP: 0010:bpf_prog_run_generic_xdp+0xab1/0x1510 net/core/dev.c:4971
Code: e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 48 c7 69 f8 49 8b 2f 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 2f c7 69 f8 <48> 83 bc 24 f0 00 00 00 00 41 0f 94 c6 48 8b 33 48 31 ee 48 b8 ff
RSP: 0018:ffffc90000a182e8 EFLAGS: 00000246
RAX: 1ffff11005f6c345 RBX: ffff88802fb61a28 RCX: ffff88801d2f9e00
RDX: ffff88801d2f9e00 RSI: 000000000000dd86 RDI: 000000000000dd86
RBP: aaaa0aaaaaaaaaaa R08: ffffffff89bbc188 R09: 0000000000000000
R10: ffffc90000a18530 R11: fffff520001430ad R12: dffffc0000000000
R13: 1ffff920001430a7 R14: ffff88803191893f R15: ffff888031918932
netif_receive_generic_xdp net/core/dev.c:5088 [inline]
do_xdp_generic+0x757/0xd30 net/core/dev.c:5150
__netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5494
__netif_receive_skb_one_core net/core/dev.c:5672 [inline]
__netif_receive_skb+0x12f/0x650 net/core/dev.c:5787
process_backlog+0x662/0x15b0 net/core/dev.c:6119
__napi_poll+0xcb/0x490 net/core/dev.c:6885
napi_poll net/core/dev.c:6954 [inline]
net_rx_action+0x89b/0x1240 net/core/dev.c:7076
handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561
__do_softirq kernel/softirq.c:595 [inline]
invoke_softirq kernel/softirq.c:435 [inline]
__irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662
irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5855
Code: 2b 00 74 08 4c 89 f7 e8 8a e6 8a 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc900001f7940 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff9200003ef34 RCX: ffff88801d2fa8e8
RDX: dffffc0000000000 RSI: ffffffff8c0aad40 RDI: ffffffff8c600460
RBP: ffffc900001f7aa0 R08: ffffffff942db937 R09: 1ffffffff285b726
R10: dffffc0000000000 R11: fffffbfff285b727 R12: 1ffff9200003ef30
R13: dffffc0000000000 R14: ffffc900001f79a0 R15: 0000000000000246
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
wg_ratelimiter_gc_entries+0x60/0x470 drivers/net/wireguard/ratelimiter.c:63
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244