audit: type=1400 audit(1585801022.017:3074): avc:  denied  { map } for  pid=31657 comm="sh" path="/bin/dash" dev="sda1" ino=1473 scontext=system_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=b62/1/0x4000000000000004 softirq=370380/370381 fqs=5246 
rcu: 	 (t=10503 jiffies g=389865 q=169088)
NMI backtrace for cpu 1
CPU: 1 PID: 31390 Comm: syz-executor.1 Not tainted 4.19.113-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+0x188/0x20d lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x170/0x1bb kernel/rcu/tree.c:1340
 print_cpu_stall kernel/rcu/tree.c:1478 [inline]
 check_cpu_stall kernel/rcu/tree.c:1550 [inline]
 __rcu_pending kernel/rcu/tree.c:3293 [inline]
 rcu_pending kernel/rcu/tree.c:3336 [inline]
 rcu_check_callbacks.cold+0x634/0xddc kernel/rcu/tree.c:2682
 update_process_times+0x2a/0x70 kernel/time/timer.c:1638
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:168
 tick_sched_timer+0x42/0x130 kernel/time/tick-sched.c:1278
 __run_hrtimer kernel/time/hrtimer.c:1401 [inline]
 __hrtimer_run_queues+0x2fc/0xd50 kernel/time/hrtimer.c:1463
 hrtimer_interrupt+0x312/0x770 kernel/time/hrtimer.c:1521
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline]
 smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1092
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline]
RIP: 0010:kfree+0xf7/0x220 mm/slab.c:3823
Code: 00 84 c0 0f 84 b5 00 00 00 f6 c7 02 0f 84 89 00 00 00 e8 bc 70 cf ff 48 83 3d 7c 11 15 07 00 0f 84 25 01 00 00 48 89 df 57 9d <0f> 1f 44 00 00 5b 5d 41 5c 41 5d c3 65 8b 05 06 3c 64 7e 83 f8 3f
RSP: 0018:ffff8880ae707df0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000007 RBX: 0000000000000286 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff888096d7cd00 RDI: 0000000000000286
RBP: ffff88808e9b4840 R08: ffff888096d7c480 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88812c3dc640
R13: ffffffff8156515c R14: ffff8880ae707e90 R15: dffffc0000000000
 __rcu_reclaim kernel/rcu/rcu.h:231 [inline]
 rcu_do_batch kernel/rcu/tree.c:2584 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline]
 rcu_process_callbacks+0xc3c/0x17f0 kernel/rcu/tree.c:2881
 __do_softirq+0x26c/0x93c kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x17b/0x1c0 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:544 [inline]
 smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1094
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
 </IRQ>
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x50/0x80 kernel/locking/spinlock.c:192
Code: c0 98 56 b2 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d e1 91 92 01 00 74 25 fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 46 d6 26 fa 65 8b 05 ff 28 e2 78 85 c0 74 02 5d
RSP: 0018:ffff888210cf7428 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff1164ad3 RBX: ffff888096d7c480 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff888096d7ccfc
RBP: ffff8880ae72c280 R08: ffff888096d7c480 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ae72c280
R13: ffff8880a74ee300 R14: 0000000000000000 R15: 0000000000000001
 finish_lock_switch kernel/sched/core.c:2576 [inline]
 finish_task_switch+0x146/0x780 kernel/sched/core.c:2676
 context_switch kernel/sched/core.c:2829 [inline]
 __schedule+0x86e/0x1d80 kernel/sched/core.c:3515
 preempt_schedule_irq+0xb0/0x140 kernel/sched/core.c:3742
 retint_kernel+0x1b/0x2d
RIP: 0010:arch_atomic_dec_and_test arch/x86/include/asm/atomic.h:125 [inline]
RIP: 0010:atomic_dec_and_test include/asm-generic/atomic-instrumented.h:260 [inline]
RIP: 0010:page_ref_dec_and_test include/linux/page_ref.h:139 [inline]
RIP: 0010:put_page_testzero include/linux/mm.h:520 [inline]
RIP: 0010:release_pages+0x1d4/0x18f0 mm/swap.c:760
Code: 31 ff 44 89 f6 e8 bc 8a e1 ff 45 85 f6 0f 84 77 0b 00 00 e8 3e 89 e1 ff be 04 00 00 00 4c 89 ef e8 11 45 17 00 f0 41 ff 4d 00 <41> 0f 94 c5 31 ff 44 89 ee e8 4e 8a e1 ff 45 84 ed 0f 84 07 03 00
RSP: 0018:ffff888210cf7648 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13
RAX: fffff9400052b39f RBX: dffffc0000000000 RCX: ffffffff8186196f
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffea0002959cf4
RBP: ffffea0002959cc0 R08: ffff888096d7c480 R09: fffff9400052b39f
R10: fffff9400052b39e R11: ffffea0002959cf7 R12: 0000000000000000
R13: ffffea0002959cf4 R14: 0000000000000039 R15: 000000000000003e
 tlb_flush_mmu_free+0x72/0x140 mm/memory.c:249
 zap_pte_range mm/memory.c:1405 [inline]
 zap_pmd_range mm/memory.c:1440 [inline]
 zap_pud_range mm/memory.c:1469 [inline]
 zap_p4d_range mm/memory.c:1490 [inline]
 unmap_page_range+0x171b/0x1de0 mm/memory.c:1511
 unmap_single_vma+0x196/0x300 mm/memory.c:1556
 unmap_vmas+0xa9/0x180 mm/memory.c:1586
 exit_mmap+0x2b2/0x510 mm/mmap.c:3091
 __mmput kernel/fork.c:1015 [inline]
 mmput+0x14e/0x4a0 kernel/fork.c:1036
 exit_mm kernel/exit.c:546 [inline]
 do_exit+0xac8/0x2f30 kernel/exit.c:867
 do_group_exit+0x125/0x350 kernel/exit.c:983
 get_signal+0x3ec/0x1f90 kernel/signal.c:2588
 do_signal+0x8f/0x1710 arch/x86/kernel/signal.c:821
 exit_to_usermode_loop+0x22b/0x2b0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c849
Code: 24 48 89 44 24 08 48 c7 44 24 10 58 1f 00 00 e8 dd a0 fa ff 48 8b 44 24 18 48 89 44 24 40 48 8b 6c 24 20 48 83 c4 28 c3 e8 f4 <aa> ff ff eb 82 cc cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 76 69
RSP: 002b:00007f22f79bfc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000048
RAX: 0000000000000000 RBX: 00007f22f79c06d4 RCX: 000000000045c849
RDX: 0000000000042800 RSI: 0000000000000004 RDI: 0000000000000003
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000000c5 R14: 00000000004c351f R15: 000000000076bf0c