rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P2/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=54477, q=1598190 ncpus=2)
task:kthreadd state:R running task stack:25680 pid:2 tgid:2 ppid:0 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0xed6/0x5920 kernel/sched/core.c:6675
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:6997
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_release+0x3e5/0x6f0 kernel/locking/lockdep.c:5830
Code: 7e 83 f8 01 0f 85 fd 01 00 00 9c 58 f6 c4 02 0f 85 e8 01 00 00 48 f7 04 24 00 02 00 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 c7 43 08 00 00 00 00 48 8b 84 24 88
RSP: 0018:ffffc90000077730 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff9200000eee8 RCX: ffffc90000077780
RDX: 1ffff1100385b51a RSI: ffffffff8b6ccf40 RDI: ffffffff8bd196e0
RBP: c4ba6d2bc52afeaa R08: 0000000000000000 R09: fffffbfff20be2b1
R10: ffffffff905f158f R11: 0000000000000050 R12: 0000000000000001
R13: 0000000000000002 R14: ffff88801c2da8d8 R15: ffff88801c2d9e00
rcu_lock_release include/linux/rcupdate.h:347 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
page_ext_put+0x43/0xd0 mm/page_ext.c:550
__reset_page_owner+0x28d/0x400 mm/page_owner.c:300
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1108 [inline]
free_unref_page+0x5f4/0xdc0 mm/page_alloc.c:2638
__put_partials+0x14c/0x170 mm/slub.c:3146
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:247 [inline]
slab_post_alloc_hook mm/slub.c:4086 [inline]
slab_alloc_node mm/slub.c:4135 [inline]
kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4142
copy_signal+0x50/0x830 kernel/fork.c:1844
copy_process+0x275c/0x8dc0 kernel/fork.c:2372
kernel_clone+0xfd/0x960 kernel/fork.c:2787
kernel_thread+0xc0/0x100 kernel/fork.c:2849
create_kthread kernel/kthread.c:412 [inline]
kthreadd+0x4ef/0x7d0 kernel/kthread.c:765
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: rcu_preempt kthread starved for 10530 jiffies! g54477 f0x2 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:27392 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0xed6/0x5920 kernel/sched/core.c:6675
__schedule_loop kernel/sched/core.c:6752 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6767
schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2615
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 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: 5280 Comm: kworker/0:7 Not tainted 6.11.0-syzkaller-11624-ge477dba5442c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:in_softirq_really kernel/kcov.c:171 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data+0x24/0x90 kernel/kcov.c:246
Code: 90 90 90 90 90 90 49 89 d2 49 89 f8 49 89 f1 65 48 8b 15 6f e9 76 7e 65 8b 05 70 e9 76 7e a9 00 01 ff 00 74 1d f6 c4 01 74 67 00 00 0f 00 75 60 a9 00 00 f0 00 75 59 8b 82 1c 16 00 00 85 c0
RSP: 0018:ffffc900000079f8 EFLAGS: 00000202
RAX: 0000000080000102 RBX: 0000000000000002 RCX: ffffffff893cf3d2
RDX: ffff88802fda3c00 RSI: 0000000000000001 RDI: 0000000000000005
RBP: ffffffff8ca25040 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000005 R14: 0000000000000004 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2b0a5f CR3: 000000000df7c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__sanitizer_cov_trace_switch+0x54/0x90 kernel/kcov.c:351
nf_hook_slow+0xd2/0x200 net/netfilter/core.c:627
nf_hook.constprop.0+0x42e/0x750 include/linux/netfilter.h:269
NF_HOOK include/linux/netfilter.h:312 [inline]
ip_local_deliver+0x169/0x1f0 net/ipv4/ip_input.c:254
dst_input include/net/dst.h:460 [inline]
ip_rcv_finish net/ipv4/ip_input.c:449 [inline]
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
ip_rcv+0x2c3/0x5d0 net/ipv4/ip_input.c:569
__netif_receive_skb_one_core+0x199/0x1e0 net/core/dev.c:5662
__netif_receive_skb+0x1d/0x160 net/core/dev.c:5775
process_backlog+0x443/0x15f0 net/core/dev.c:6107
__napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6771
napi_poll net/core/dev.c:6840 [inline]
net_rx_action+0xa92/0x1010 net/core/dev.c:6962
handle_softirqs+0x213/0x8f0 kernel/softirq.c:554
do_softirq kernel/softirq.c:455 [inline]
do_softirq+0xb2/0xf0 kernel/softirq.c:442
__local_bh_enable_ip+0x100/0x120 kernel/softirq.c:382
spin_unlock_bh include/linux/spinlock.h:396 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:820 [inline]
nsim_dev_trap_report_work+0x870/0xc80 drivers/net/netdevsim/dev.c:850
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244