rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...0: (0 ticks this GP) idle=9014/1/0x4000000000000000 softirq=52978/52978 fqs=2715
rcu: hardirqs softirqs csw/system
rcu: number: 0 0 0
rcu: cputime: 0 0 0 ==> 52500(ms)
rcu: (detected by 1, t=10502 jiffies, g=68325, q=888 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 9241 Comm: kworker/u4:13 Not tainted 6.5.0-rc4-syzkaller-00041-gec351c8f2e62 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Workqueue: netns cleanup_net
RIP: 0010:kasan_check_range+0x1a/0x190 mm/kasan/generic.c:186
Code: 5d 41 5c c3 66 66 2e 0f 1f 84 00 00 00 00 00 90 66 0f 1f 00 48 85 f6 0f 84 48 01 00 00 48 89 f8 41 54 44 0f b6 c2 48 01 f0 55 <53> 0f 82 c6 00 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 f8 0f 83
RSP: 0018:ffffc90000007ab0 EFLAGS: 00000096
RAX: ffffffff9184ae90 RBX: 0000000000000067 RCX: ffffffff8166bce3
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff9184ae88
RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff23095d0
R10: ffffffff9184ae87 R11: 000000000000004e R12: ffff888035b4c75a
R13: ffff888035b4c738 R14: 00000000d6bf87c4 R15: 0000000000000002
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f14cec0ef78 CR3: 00000000769b2000 CR4: 0000000000350ef0
Call Trace:
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
hlock_class kernel/locking/lockdep.c:228 [inline]
__lock_acquire+0x15e3/0x5de0 kernel/locking/lockdep.c:5140
lock_acquire kernel/locking/lockdep.c:5761 [inline]
lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5726
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162
debug_object_deactivate lib/debugobjects.c:783 [inline]
debug_object_deactivate+0x113/0x320 lib/debugobjects.c:771
debug_hrtimer_deactivate kernel/time/hrtimer.c:427 [inline]
debug_deactivate kernel/time/hrtimer.c:483 [inline]
__run_hrtimer kernel/time/hrtimer.c:1656 [inline]
__hrtimer_run_queues+0x470/0xc10 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1098 [inline]
__sysvec_apic_timer_interrupt+0x14a/0x430 arch/x86/kernel/apic/apic.c:1115
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1109
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__unwind_start+0x2ea/0x7e0 arch/x86/kernel/unwind_orc.c:713
Code: c0 74 08 3c 03 0f 8e fe 02 00 00 41 c7 06 00 00 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 65 48 8b 04 25 80 b9 03 00 <48> 39 c5 0f 84 72 02 00 00 48 8d bd 58 18 00 00 48 b8 00 00 00 00
RSP: 0018:ffffc900166573f8 EFLAGS: 00000246
RAX: ffff888035b4bb80 RBX: ffffc900166574d8 RCX: 0000000000000000
RDX: 1ffff92002ccae8e RSI: 0000000000000000 RDI: ffffc900166574a8
RBP: ffff888035b4bb80 R08: 0000000000000100 R09: 0000000000000000
R10: ffffc90016657448 R11: 0000000000000000 R12: 0000000000000000
R13: ffffc90016657508 R14: ffffc90016657448 R15: ffffc90016657470
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0x6d/0xf0 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
__kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:492
kvfree_call_rcu+0x70/0xbe0 kernel/rcu/tree.c:3368
drop_sysctl_table+0x2a5/0x4e0 fs/proc/proc_sysctl.c:1506
unregister_sysctl_table fs/proc/proc_sysctl.c:1527 [inline]
unregister_sysctl_table+0x41/0x60 fs/proc/proc_sysctl.c:1519
mpls_dev_sysctl_unregister net/mpls/af_mpls.c:1446 [inline]
mpls_dev_notify+0x5ef/0xa00 net/mpls/af_mpls.c:1658
notifier_call_chain+0xb6/0x3b0 kernel/notifier.c:93
call_netdevice_notifiers_info+0xb9/0x130 net/core/dev.c:1962
call_netdevice_notifiers_extack net/core/dev.c:2000 [inline]
call_netdevice_notifiers net/core/dev.c:2014 [inline]
unregister_netdevice_many_notify+0x82b/0x19a0 net/core/dev.c:10850
sit_exit_batch_net+0x4aa/0x580 net/ipv6/sit.c:1887
ops_exit_list+0x125/0x170 net/core/net_namespace.c:175
cleanup_net+0x505/0xb20 net/core/net_namespace.c:614
process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2597
worker_thread+0x687/0x1110 kernel/workqueue.c:2748
kthread+0x33a/0x430 kernel/kthread.c:389
ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
rcu: rcu_preempt kthread starved for 5065 jiffies! g68325 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:27984 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0xee1/0x59f0 kernel/sched/core.c:6710
schedule+0xe7/0x1b0 kernel/sched/core.c:6786
schedule_timeout+0x157/0x2c0 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x1ec/0xa50 kernel/rcu/tree.c:1609
rcu_gp_kthread+0x249/0x380 kernel/rcu/tree.c:1808
kthread+0x33a/0x430 kernel/kthread.c:389
ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 19224 Comm: syz-executor.3 Not tainted 6.5.0-rc4-syzkaller-00041-gec351c8f2e62 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
RIP: 0010:csd_lock_wait kernel/smp.c:296 [inline]
RIP: 0010:smp_call_function_many_cond+0x4e2/0x1570 kernel/smp.c:835
Code: 00 fc ff df 4d 89 fc 4c 89 fd 49 c1 ec 03 83 e5 07 49 01 c4 83 c5 03 e8 1c 5f 0b 00 f3 90 41 0f b6 04 24 40 38 c5 7c 08 84 c0 <0f> 85 3c 0e 00 00 8b 43 08 31 ff 83 e0 01 41 89 c5 89 c6 e8 66 5a
RSP: 0018:ffffc9000fad7ac0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880b9844fe0 RCX: ffffc90017ebb000
RDX: 0000000000040000 RSI: ffffffff817aa904 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffed10173089fd
R13: 0000000000000001 R14: ffff8880b993d580 R15: ffff8880b9844fe8
FS: 00007efcfebba6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efcfdf98000 CR3: 000000002f327000 CR4: 0000000000350ee0
Call Trace:
on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1003
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:2001 [inline]
text_poke_bp_batch+0x250/0x780 arch/x86/kernel/alternative.c:2211
text_poke_flush arch/x86/kernel/alternative.c:2402 [inline]
text_poke_flush arch/x86/kernel/alternative.c:2399 [inline]
text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:2409
arch_jump_label_transform_apply+0x17/0x30 arch/x86/kernel/jump_label.c:146
jump_label_update+0x32e/0x410 kernel/jump_label.c:829
static_key_enable_cpuslocked+0x1b5/0x270 kernel/jump_label.c:205
static_key_enable+0x1a/0x20 kernel/jump_label.c:218
__sched_core_enable kernel/sched/core.c:397 [inline]
sched_core_get+0x86/0xa0 kernel/sched/core.c:421
sched_core_alloc_cookie kernel/sched/core_sched.c:18 [inline]
sched_core_share_pid+0x3e8/0x9b0 kernel/sched/core_sched.c:185
__do_sys_prctl+0xed3/0x1d40 kernel/sys.c:2680
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7efcfde7cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007efcfebba0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000009d
RAX: ffffffffffffffda RBX: 00007efcfdf9c050 RCX: 00007efcfde7cae9
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000000000003e
RBP: 00007efcfdec847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007efcfdf9c050 R15: 00007ffeb4007e88