rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...0: (1 GPs behind) idle=fd2/1/0x4000000000000000 softirq=42356/42357 fqs=5240 
	(detected by 1, t=10502 jiffies, g=74097, q=4819)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 20271 Comm: syz-executor.2 Not tainted 5.8.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_memory_region+0x12b/0x180 mm/kasan/generic.c:193
Code: 3a 00 74 ef 49 8d 04 2c 48 85 d2 75 0b 48 89 da 48 29 c2 e9 55 ff ff ff 49 39 d2 75 17 49 0f be 02 41 83 e1 07 49 39 c1 7d 0a <5b> b8 01 00 00 00 5d 41 5c c3 44 89 c2 e8 43 f0 ff ff 5b 83 f0 01
RSP: 0018:ffffc90000007b00 EFLAGS: 00000046
RAX: fffffbfff18b4b70 RBX: fffffbfff18b4b70 RCX: ffffffff8159a3e8
RDX: fffffbfff18b4b70 RSI: 0000000000000008 RDI: ffffffff8c5a5b78
RBP: fffffbfff18b4b6f R08: 0000000000000000 R09: ffffffff8c5a5b7f
R10: fffffbfff18b4b6f R11: 0000000000000001 R12: ffff88804ef0c180
R13: 0000000000000af3 R14: ffff88809e679300 R15: 0000000000044000
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001140 CR3: 0000000009a79000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 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 include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
 spin_lock include/linux/spinlock.h:353 [inline]
 advance_sched+0x4f/0x990 net/sched/sch_taprio.c:699
 __run_hrtimer kernel/time/hrtimer.c:1520 [inline]
 __hrtimer_run_queues+0x6a9/0xfc0 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
 </IRQ>
 __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:585
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x9/0x60 kernel/kcov.c:197
Code: 5d be 03 00 00 00 e9 b6 e7 23 02 66 0f 1f 44 00 00 48 8b be b0 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 65 48 8b 14 25 00 ff 01 00 <65> 8b 05 a0 41 8e 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74
RSP: 0018:ffffc900018979c8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffea000188f480 RCX: ffffffff81a2fd9b
RDX: ffff88804ef0c180 RSI: ffff88804ef0c180 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88804ef0c187
R10: 0000000000000000 R11: 0000000000000000 R12: ffffea000188f488
R13: ffffea000188f480 R14: dffffc0000000000 R15: 00007f7542788000
 PageSwapBacked include/linux/page-flags.h:348 [inline]
 mm_counter_file include/linux/mm.h:1884 [inline]
 mm_counter include/linux/mm.h:1893 [inline]
 zap_pte_range mm/memory.c:1088 [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+0xeb9/0x2940 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:3162
 __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
 __do_sys_exit_group kernel/exit.c:914 [inline]
 __se_sys_exit_group kernel/exit.c:912 [inline]
 __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:912
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45cc79
Code: Bad RIP value.
RSP: 002b:00007fffc9b49ef8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 000000000045cc79
RDX: 0000000000416791 RSI: fffffffffffffff7 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000005ab1af0 R09: 00007fffc9b49f50
R10: ffffffff81797474 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffc9b49f50 R14: 0000000000000000 R15: 00007fffc9b49f60