rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (10499 ticks this GP) idle=88d/1/0x4000000000000000 softirq=147924/147924 fqs=16
(t=10500 jiffies g=219733 q=625)
rcu: rcu_preempt kthread starved for 10465 jiffies! g219733 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:28256 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1955
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2128
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
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: 14520 Comm: kworker/u4:1 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:rep_nop arch/x86/include/asm/vdso/processor.h:13 [inline]
RIP: 0010:cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline]
RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_many_cond+0x450/0xc20 kernel/smp.c:969
Code: 76 7e 0b 00 85 ed 74 4d 48 b8 00 00 00 00 00 fc ff df 4d 89 f4 4c 89 f5 49 c1 ec 03 83 e5 07 49 01 c4 83 c5 03 e8 30 7c 0b 00 90 41 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 33 06 00 00 8b 43
RSP: 0018:ffffc90014c9f9f8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b9d3dd40 RCX: 0000000000000000
RDX: ffff88809428e000 RSI: ffffffff816b6b70 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff816b6b96 R11: 0000000000000000 R12: ffffed10173a7ba9
R13: 0000000000000001 R14: ffff8880b9d3dd48 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ed21000 CR3: 000000000b88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000009800 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
on_each_cpu_cond_mask+0x56/0xa0 kernel/smp.c:1135
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:1112 [inline]
text_poke_bp_batch+0x1b3/0x560 arch/x86/kernel/alternative.c:1297
text_poke_flush arch/x86/kernel/alternative.c:1451 [inline]
text_poke_flush arch/x86/kernel/alternative.c:1448 [inline]
text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1458
arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
jump_label_update+0x1d5/0x430 kernel/jump_label.c:830
static_key_enable_cpuslocked+0x1b1/0x260 kernel/jump_label.c:177
static_key_enable+0x16/0x20 kernel/jump_label.c:190
toggle_allocation_gate mm/kfence/core.c:732 [inline]
toggle_allocation_gate+0x100/0x390 mm/kfence/core.c:724
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
NMI backtrace for cpu 1
CPU: 1 PID: 19815 Comm: syz-executor.0 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3878 [inline]
rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2597
update_process_times+0x16d/0x200 kernel/time/timer.c:1785
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1428
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:194
Code: 74 24 10 e8 0a 9d 14 f8 48 89 ef e8 52 13 15 f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 93 db 07 f8 65 8b 05 8c 19 bb 76 85 c0 74 0a 5b 5d c3 e8 00 d6
RSP: 0018:ffffc90000fd8cc0 EFLAGS: 00000206
RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff1ffa026
RDX: 0000000000000000 RSI: 0000000000000101 RDI: 0000000000000001
RBP: ffff88809929bd08 R08: 0000000000000001 R09: ffffffff8ff77aef
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88809929bd08 R14: ffffffff874825a0 R15: 0000000000000000
spin_unlock_irqrestore include/linux/spinlock.h:404 [inline]
skb_dequeue+0x125/0x180 net/core/skbuff.c:3216
mrp_queue_xmit net/802/mrp.c:363 [inline]
mrp_join_timer+0x97/0xc0 net/802/mrp.c:608
call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1466 [inline]
__run_timers.part.0+0x675/0xa20 kernel/time/timer.c:1734
__run_timers kernel/time/timer.c:1715 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:637
irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x55/0x180 mm/kasan/generic.c:189
Code: 86 05 01 00 00 49 83 e9 01 48 89 fd 48 b8 00 00 00 00 00 fc ff df 4d 89 ca 48 c1 ed 03 49 c1 ea 03 48 01 c5 49 01 c2 48 89 e8 <49> 8d 5a 01 48 89 da 48 29 ea 48 83 fa 10 7e 63 41 89 eb 41 83 e3
RSP: 0018:ffffc90003077868 EFLAGS: 00000282
RAX: fffffbfff17aaa2c RBX: 1ffff9200060ef12 RCX: ffffffff8946b616
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffffff8bd55160
RBP: fffffbfff17aaa2c R08: 0000000000000001 R09: ffffffff8bd55167
R10: fffffbfff17aaa2c R11: 0000000000000001 R12: dffffc0000000000
R13: ffff88805166ca38 R14: ffff8880a4a05ae0 R15: 0000000000000000
instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1667 [inline]
rwsem_write_trylock kernel/locking/rwsem.c:254 [inline]
__down_write_common kernel/locking/rwsem.c:1267 [inline]
__down_write kernel/locking/rwsem.c:1277 [inline]
down_write+0xa6/0x150 kernel/locking/rwsem.c:1524
kernfs_activate+0x2a/0x1d0 fs/kernfs/dir.c:1293
kernfs_add_one+0x368/0x4c0 fs/kernfs/dir.c:766
__kernfs_create_file+0x29c/0x350 fs/kernfs/file.c:1014
sysfs_add_file_mode_ns+0x20f/0x3f0 fs/sysfs/file.c:294
create_files fs/sysfs/group.c:64 [inline]
internal_create_group+0x322/0xb10 fs/sysfs/group.c:148
internal_create_groups.part.0+0x90/0x140 fs/sysfs/group.c:188
internal_create_groups fs/sysfs/group.c:184 [inline]
sysfs_create_groups+0x25/0x50 fs/sysfs/group.c:214
device_add_groups drivers/base/core.c:2473 [inline]
device_add_attrs drivers/base/core.c:2621 [inline]
device_add+0x81f/0x1ee0 drivers/base/core.c:3345
netdev_register_kobject+0x181/0x430 net/core/net-sysfs.c:2010
register_netdevice+0xd31/0x1500 net/core/dev.c:10336
ppp_unit_register drivers/net/ppp/ppp_generic.c:1196 [inline]
ppp_dev_configure+0xb3e/0xec0 drivers/net/ppp/ppp_generic.c:1252
ppp_create_interface drivers/net/ppp/ppp_generic.c:3325 [inline]
ppp_unattached_ioctl drivers/net/ppp/ppp_generic.c:1037 [inline]
ppp_ioctl+0x1889/0x2d50 drivers/net/ppp/ppp_generic.c:710
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f429c30fe99
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f429ac85168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f429c422f60 RCX: 00007f429c30fe99
RDX: 0000000020000680 RSI: 00000000c004743e RDI: 0000000000000003
RBP: 00007f429c369ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffbf5c000f R14: 00007f429ac85300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 76 7e jbe 0x80
2: 0b 00 or (%rax),%eax
4: 85 ed test %ebp,%ebp
6: 74 4d je 0x55
8: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
f: fc ff df
12: 4d 89 f4 mov %r14,%r12
15: 4c 89 f5 mov %r14,%rbp
18: 49 c1 ec 03 shr $0x3,%r12
1c: 83 e5 07 and $0x7,%ebp
1f: 49 01 c4 add %rax,%r12
22: 83 c5 03 add $0x3,%ebp
25: e8 30 7c 0b 00 callq 0xb7c5a
* 2a: f3 90 pause <-- trapping instruction
2c: 41 0f b6 04 24 movzbl (%r12),%eax
31: 40 38 c5 cmp %al,%bpl
34: 7c 08 jl 0x3e
36: 84 c0 test %al,%al
38: 0f 85 33 06 00 00 jne 0x671
3e: 8b .byte 0x8b
3f: 43 rex.XB