syzbot

rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10499 ticks this GP) idle=57e/1/0x4000000000000002 softirq=11438/11438 fqs=38 
	(t=10500 jiffies g=6233 q=340)
rcu: rcu_preempt kthread starved for 10419 jiffies! g6233 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: RCU grace-period kthread stack dump:
rcu_preempt     R  running task    29032    10      2 0x80004000
Call Trace:
 context_switch kernel/sched/core.c:3385 [inline]
 __schedule+0x9a0/0xcc0 kernel/sched/core.c:4081
 schedule+0x181/0x210 kernel/sched/core.c:4155
 schedule_timeout+0x14f/0x240 kernel/time/timer.c:1895
 rcu_gp_fqs_loop kernel/rcu/tree.c:1661 [inline]
 rcu_gp_kthread+0xed8/0x1770 kernel/rcu/tree.c:1821
 kthread+0x332/0x350 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
NMI backtrace for cpu 0
CPU: 0 PID: 8231 Comm: syz-executor.0 Not tainted 5.4.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fb/0x318 lib/dump_stack.c:118
 nmi_cpu_backtrace+0xaf/0x1a0 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x174/0x290 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x10/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x15a/0x220 kernel/rcu/tree_stall.h:254
 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:529 [inline]
 rcu_pending kernel/rcu/tree.c:2827 [inline]
 rcu_sched_clock_irq+0xe25/0x1ad0 kernel/rcu/tree.c:2271
 update_process_times+0x12d/0x180 kernel/time/timer.c:1726
 tick_sched_handle kernel/time/tick-sched.c:167 [inline]
 tick_sched_timer+0x263/0x420 kernel/time/tick-sched.c:1310
 __run_hrtimer kernel/time/hrtimer.c:1514 [inline]
 __hrtimer_run_queues+0x403/0x840 kernel/time/hrtimer.c:1576
 hrtimer_interrupt+0x38c/0xda0 kernel/time/hrtimer.c:1638
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
 smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:mod_memcg_page_state+0x3d/0x190 include/linux/memcontrol.h:653
Code: 28 2e 00 48 83 c3 38 48 89 d8 48 c1 e8 03 49 bc 00 00 00 00 00 fc ff df 42 80 3c 20 00 74 08 48 89 df e8 b6 9f 69 00 48 8b 1b <48> 85 db 0f 84 d8 00 00 00 48 c7 c0 20 96 0a 89 48 c1 e8 03 42 80
RSP: 0018:ffffc900026c7530 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 1ffffd40004c6237 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc90001d29000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc900026c7550 R08: dffffc0000000000 R09: fffffbfff120248a
R10: fffffbfff120248a R11: 0000000000000000 R12: dffffc0000000000
R13: dffffc0000000000 R14: 00000000fffffffc R15: ffff888098e5b5a8
 free_thread_stack+0x168/0x590 kernel/fork.c:280
 release_task_stack kernel/fork.c:440 [inline]
 put_task_stack+0xa3/0x130 kernel/fork.c:451
 finish_task_switch+0x3f1/0x550 kernel/sched/core.c:3256
 context_switch kernel/sched/core.c:3388 [inline]
 __schedule+0x9a8/0xcc0 kernel/sched/core.c:4081
 preempt_schedule_common kernel/sched/core.c:4236 [inline]
 preempt_schedule+0xdb/0x120 kernel/sched/core.c:4261
 ___preempt_schedule+0x16/0x18 arch/x86/entry/thunk_64.S:50
 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock+0x3a/0x40 kernel/locking/spinlock.c:183
 spin_unlock include/linux/spinlock.h:378 [inline]
 __cond_resched_lock+0x93/0x1d0 kernel/sched/core.c:5647
 __purge_vmap_area_lazy+0x1a05/0x1b00 mm/vmalloc.c:1319
 _vm_unmap_aliases+0x43a/0x4c0 mm/vmalloc.c:1730
 vm_unmap_aliases+0x19/0x20 mm/vmalloc.c:1753
 change_page_attr_set_clr+0x267/0x650 arch/x86/mm/pageattr.c:1709
 change_page_attr_clear arch/x86/mm/pageattr.c:1766 [inline]
 set_memory_ro+0x66/0x90 arch/x86/mm/pageattr.c:1899
 bpf_jit_binary_lock_ro include/linux/filter.h:786 [inline]
 bpf_int_jit_compile+0x8bab/0x9090 arch/x86/net/bpf_jit_comp.c:1659
 bpf_prog_select_runtime+0x787/0xa80 kernel/bpf/core.c:1801
 bpf_migrate_filter net/core/filter.c:1275 [inline]
 bpf_prepare_filter+0xfd9/0x1270 net/core/filter.c:1323
 __get_filter+0x2f0/0x410 net/core/filter.c:1492
 sk_attach_filter+0x23/0x140 net/core/filter.c:1507
 sock_setsockopt+0x1ce3/0x2910 net/core/sock.c:999
 __sys_setsockopt+0x4de/0x720 net/socket.c:2113
 __do_sys_setsockopt net/socket.c:2133 [inline]
 __se_sys_setsockopt net/socket.c:2130 [inline]
 __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2130
 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a679
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fc281c27c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045a679
RDX: 000000000000001a RSI: 0000000000000001 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000010 R09: 0000000000000000
R10: 0000000020000080 R11: 0000000000000246 R12: 00007fc281c286d4
R13: 00000000004c9ada R14: 00000000004e1b58 R15: 00000000ffffffff