audit: type=1400 audit(1579267083.127:175): avc: denied { map } for pid=20097 comm="syz-executor.5" path=2F616E6F6E5F6875676570616765202864656C6574656429 dev="hugetlbfs" ino=259286 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:hugetlbfs_t:s0 tclass=file permissive=1 rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (1 GPs behind) idle=83a/1/0x4000000000000004 softirq=185952/185953 fqs=6 rcu: (t=10501 jiffies g=225217 q=871) rcu: rcu_preempt kthread starved for 10399 jiffies! g225217 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29072 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_timeout+0x4db/0xfc0 kernel/time/timer.c:1806 rcu_gp_kthread+0xd5c/0x2190 kernel/rcu/tree.c:2202 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 NMI backtrace for cpu 0 CPU: 0 PID: 20121 Comm: syz-executor.5 Not tainted 4.19.96-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x189/0x1d5 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+0x5e3/0xd90 kernel/rcu/tree.c:2682 update_process_times+0x32/0x80 kernel/time/timer.c:1638 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:164 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1274 __run_hrtimer kernel/time/hrtimer.c:1401 [inline] __hrtimer_run_queues+0x33b/0xdc0 kernel/time/hrtimer.c:1463 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1521 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x54/0x90 kernel/locking/spinlock.c:192 Code: c0 d8 5b f2 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 33 48 83 3d 1d 63 9c 01 00 74 20 fb 66 0f 1f 44 00 00 01 00 00 00 e8 b2 e7 f2 f9 65 8b 05 fb f4 ab 78 85 c0 74 06 41 RSP: 0018:ffff8880ae807dd0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff11e4b7b RBX: ffff88808935a590 RCX: 1ffff1100498456c RDX: dffffc0000000000 RSI: ffff888024c22b40 RDI: ffff888024c22b3c RBP: ffff8880ae807dd8 R08: ffff888024c222c0 R09: ffff888024c22b60 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ae823a00 R13: dffffc0000000000 R14: ffffffff85d9f470 R15: ffff8880ae823a00 expire_timers kernel/time/timer.c:1362 [inline] __run_timers kernel/time/timer.c:1684 [inline] __run_timers kernel/time/timer.c:1652 [inline] run_timer_softirq+0x644/0x16a0 kernel/time/timer.c:1697 __do_softirq+0x25c/0x921 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094 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:lock_release+0x47a/0xa30 kernel/locking/lockdep.c:3925 Code: 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 a7 03 00 00 48 83 3d 2d 14 a0 07 00 0f 84 65 02 00 00 48 8b bd 68 ff ff ff 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 c7 04 03 00 00 00 RSP: 0018:ffff88820b6ff5c0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff11e4b79 RBX: 1ffff110416dfebe RCX: 1ffff11004984566 RDX: dffffc0000000000 RSI: 0000000000000002 RDI: 0000000000000286 RBP: ffff88820b6ff678 R08: ffff888024c222c0 R09: 0000000000000001 R10: ffffed1015d04732 R11: ffff8880ae823993 R12: ffff888024c222c0 R13: ffffffff81a8c5c3 R14: 0000000000000003 R15: ffff88820b6ff650 rcu_lock_release include/linux/rcupdate.h:247 [inline] rcu_read_unlock include/linux/rcupdate.h:681 [inline] __unlock_page_memcg+0x70/0x100 mm/memcontrol.c:1953 unlock_page_memcg+0x2c/0x40 mm/memcontrol.c:1962 page_remove_file_rmap mm/rmap.c:1249 [inline] page_remove_rmap+0x57b/0x12c0 mm/rmap.c:1300 zap_pte_range mm/memory.c:1338 [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+0xda2/0x1fb0 mm/memory.c:1511 unmap_single_vma+0x19d/0x300 mm/memory.c:1556 unmap_vmas+0xae/0x180 mm/memory.c:1586 exit_mmap+0x2c2/0x530 mm/mmap.c:3091 __mmput kernel/fork.c:1005 [inline] mmput+0x15f/0x4c0 kernel/fork.c:1026 exit_mm kernel/exit.c:546 [inline] do_exit+0xb1e/0x30d0 kernel/exit.c:867 do_group_exit+0x135/0x370 kernel/exit.c:983 get_signal+0x3ec/0x1fc0 kernel/signal.c:2578 do_signal+0x95/0x1960 arch/x86/kernel/signal.c:821 exit_to_usermode_loop+0x244/0x2c0 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+0x53d/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45aff9 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:00007f63eac1bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: 0000000020000000 RBX: 00007f63eac1c6d4 RCX: 000000000045aff9 RDX: 0000000000000000 RSI: 0000000000ff5000 RDI: 0000000020000000 RBP: 000000000075bf20 R08: ffffffffffffffff R09: 0000000000000000 R10: 000000000005c831 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000710 R14: 00000000004c8474 R15: 000000000075bf2c netlink: 20 bytes leftover after parsing attributes in process `syz-executor.1'.