rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 GPs behind) idle=23e/1/0x4000000000000000 softirq=326869/326870 fqs=69
(detected by 1, t=10502 jiffies, g=614653, q=3249)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 27336 Comm: syz-executor.3 Not tainted 5.8.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:91 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:108 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:134 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:165 [inline]
RIP: 0010:check_memory_region_inline mm/kasan/generic.c:183 [inline]
RIP: 0010:check_memory_region+0xde/0x180 mm/kasan/generic.c:192
Code: 74 f2 48 89 c2 b8 01 00 00 00 48 85 d2 75 56 5b 5d 41 5c c3 48 85 d2 74 5e 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 50 80 38 00 <74> f2 eb d4 41 bc 08 00 00 00 48 89 ea 45 29 dc 4d 8d 1c 2c eb 0c
RSP: 0018:ffffc90000007a80 EFLAGS: 00000046
RAX: fffffbfff18b1f44 RBX: fffffbfff18b1f45 RCX: ffffffff8159a478
RDX: fffffbfff18b1f45 RSI: 0000000000000008 RDI: ffffffff8c58fa20
RBP: fffffbfff18b1f44 R08: 0000000000000000 R09: ffffffff8c58fa27
R10: fffffbfff18b1f44 R11: 0000000000000001 R12: ffff8881e1f78480
R13: 0000000000000000 R14: ffffffff8cad8c58 R15: 0000000000044000
FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000443300 CR3: 000000020b669000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:56 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline]
hlock_class kernel/locking/lockdep.c:179 [inline]
check_wait_context kernel/locking/lockdep.c:4054 [inline]
__lock_acquire+0x408/0x56e0 kernel/locking/lockdep.c:4330
lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:4959
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:159
debug_object_deactivate lib/debugobjects.c:710 [inline]
debug_object_deactivate+0x101/0x300 lib/debugobjects.c:698
debug_hrtimer_deactivate kernel/time/hrtimer.c:421 [inline]
debug_deactivate kernel/time/hrtimer.c:482 [inline]
__run_hrtimer kernel/time/hrtimer.c:1488 [inline]
__hrtimer_run_queues+0x3cb/0xfc0 kernel/time/hrtimer.c:1584
hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1646
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
__sysvec_apic_timer_interrupt+0x142/0x5e0 arch/x86/kernel/apic/apic.c:1097
asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711
__run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
sysvec_apic_timer_interrupt+0xe0/0x120 arch/x86/kernel/apic/apic.c:1091
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596
RIP: 0010:clear_page_erms+0x7/0x10 arch/x86/lib/clear_page_64.S:49
Code: 48 89 47 18 48 89 47 20 48 89 47 28 48 89 47 30 48 89 47 38 48 8d 7f 40 75 d9 90 c3 0f 1f 80 00 00 00 00 b9 00 10 00 00 31 c0 aa c3 cc cc cc cc cc cc 41 57 41 56 41 55 41 54 55 53 48 89 fb
RSP: 0018:ffffc900236773e0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffea0006b7b900 RCX: 0000000000000340
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8881adee4cc0
RBP: ffff8881e1f78480 R08: 0000000000000001 R09: ffffed1035bdc800
R10: 0000000000000000 R11: 0000000000000000 R12: ffffed103c3ef319
R13: dffffc0000000000 R14: ffffea0006b7b940 R15: ffff8881e1f798c8
clear_page arch/x86/include/asm/page_64.h:49 [inline]
clear_highpage include/linux/highmem.h:283 [inline]
kernel_init_free_pages+0x92/0x120 mm/page_alloc.c:1168
prep_new_page+0x12e/0x1f0 mm/page_alloc.c:2227
get_page_from_freelist+0x2642/0x36b0 mm/page_alloc.c:3794
__alloc_pages_nodemask+0x2cd/0x930 mm/page_alloc.c:4844
alloc_pages_current+0x187/0x280 mm/mempolicy.c:2292
alloc_pages include/linux/gfp.h:545 [inline]
__get_free_pages+0x8/0x40 mm/page_alloc.c:4887
tlb_next_batch mm/mmu_gather.c:29 [inline]
__tlb_remove_page_size+0x253/0x420 mm/mmu_gather.c:83
__tlb_remove_page include/asm-generic/tlb.h:439 [inline]
zap_pte_range mm/memory.c:1092 [inline]
zap_pmd_range mm/memory.c:1193 [inline]
zap_pud_range mm/memory.c:1222 [inline]
zap_p4d_range mm/memory.c:1243 [inline]
unmap_page_range+0xfb2/0x2940 mm/memory.c:1264
unmap_single_vma+0x198/0x300 mm/memory.c:1309
unmap_vmas+0x16f/0x2f0 mm/memory.c:1341
exit_mmap+0x2b1/0x510 mm/mmap.c:3150
__mmput+0x122/0x470 kernel/fork.c:1093
mmput+0x53/0x60 kernel/fork.c:1114
exit_mm kernel/exit.c:482 [inline]
do_exit+0xa8f/0x2a40 kernel/exit.c:792
do_group_exit+0x125/0x310 kernel/exit.c:903
get_signal+0x40b/0x1ee0 kernel/signal.c:2743
do_signal+0x82/0x2520 arch/x86/kernel/signal.c:810
exit_to_usermode_loop arch/x86/entry/common.c:212 [inline]
__prepare_exit_to_usermode+0x156/0x1f0 arch/x86/entry/common.c:246
do_syscall_64+0x6c/0xe0 arch/x86/entry/common.c:368
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45cb29
Code: Bad RIP value.
RSP: 002b:00007f344ba51cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000078c048 RCX: 000000000045cb29
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000078c048
RBP: 000000000078c040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078c04c
R13: 0000000000c9fb6f R14: 00007f344ba529c0 R15: 000000000078c04c
rcu: rcu_preempt kthread starved for 10331 jiffies! g614653 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:
rcu_preempt R running task 29120 10 2 0x00004000
Call Trace:
context_switch kernel/sched/core.c:3453 [inline]
__schedule+0x8e1/0x1eb0 kernel/sched/core.c:4178
schedule+0xd0/0x2a0 kernel/sched/core.c:4253
schedule_timeout+0x148/0x250 kernel/time/timer.c:1897
rcu_gp_fqs_loop kernel/rcu/tree.c:1874 [inline]
rcu_gp_kthread+0xae5/0x1b50 kernel/rcu/tree.c:2044
kthread+0x3b5/0x4a0 kernel/kthread.c:291
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293