overlayfs: fs on 'file0' does not support file handles, falling back to index=off. INFO: rcu_preempt self-detected stall on CPU 1-...: (10499 ticks this GP) idle=6ae/140000000000002/0 softirq=12106/12106 fqs=13 (t=10500 jiffies g=1849 c=1848 q=362) rcu_preempt kthread starved for 10471 jiffies! g1849 c1848 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 rcu_preempt R running task 29984 8 2 0x80000000 Call Trace: schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x43c/0xe40 kernel/time/timer.c:1746 rcu_gp_kthread+0xb8e/0x1ce0 kernel/rcu/tree.c:2255 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 NMI backtrace for cpu 1 CPU: 1 PID: 7941 Comm: syz-executor.5 Not tainted 4.14.177-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x13e/0x194 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x139/0x17e lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:158 [inline] rcu_dump_cpu_stacks+0x16d/0x1b8 kernel/rcu/tree.c:1396 print_cpu_stall kernel/rcu/tree.c:1542 [inline] check_cpu_stall kernel/rcu/tree.c:1610 [inline] __rcu_pending kernel/rcu/tree.c:3390 [inline] rcu_pending kernel/rcu/tree.c:3452 [inline] rcu_check_callbacks.cold+0x490/0xdaa kernel/rcu/tree.c:2792 update_process_times+0x29/0x60 kernel/time/timer.c:1590 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165 tick_sched_timer+0x3e/0x120 kernel/time/tick-sched.c:1223 __run_hrtimer kernel/time/hrtimer.c:1223 [inline] __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline] smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:memcmp+0x5a/0xb0 lib/string.c:861 RSP: 0018:ffff8880aeb07878 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff10 RAX: 00000000000000ff RBX: ffff8880aeb0792c RCX: 0000000000000004 RDX: 0000000000000000 RSI: ffff88809816ab94 RDI: ffff8880aeb07910 RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000005 R10: ffff888094ed0f90 R11: ffff888094ed0640 R12: ffff8880aeb07960 R13: 000000000000000a R14: ffff8880aeb07910 R15: ffff88809816ab60 find_stack lib/stackdepot.c:180 [inline] depot_save_stack+0x10d/0x401 lib/stackdepot.c:229 save_stack+0x89/0xa0 mm/kasan/kasan.c:453 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc mm/kasan/kasan.c:551 [inline] kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529 slab_post_alloc_hook mm/slab.h:442 [inline] slab_alloc_node mm/slab.c:3333 [inline] kmem_cache_alloc_node+0x135/0x7a0 mm/slab.c:3640 __alloc_skb+0x9a/0x4c0 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:980 [inline] new_skb+0x24/0x1c0 drivers/block/aoe/aoecmd.c:67 aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:427 [inline] aoecmd_cfg+0x155/0x570 drivers/block/aoe/aoecmd.c:1392 discover_timer drivers/block/aoe/aoemain.c:44 [inline] discover_timer+0xc5/0x160 drivers/block/aoe/aoemain.c:21 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279 expire_timers kernel/time/timer.c:1318 [inline] __run_timers kernel/time/timer.c:1636 [inline] __run_timers kernel/time/timer.c:1604 [inline] run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649 __do_softirq+0x254/0x9bf kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x15b/0x1a0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x91/0xe0 kernel/locking/spinlock.c:192 RSP: 0018:ffff88804bf37708 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff0fa2cd1 RBX: 0000000000000286 RCX: 1ffff110129da1e7 RDX: dffffc0000000000 RSI: ffff888094ed0f18 RDI: 0000000000000286 RBP: ffffffff8a6c5f08 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000061080 R13: ffff8880a0013c40 R14: 0000000000000000 R15: ffffffff8a6c5f08 __debug_object_init+0x167/0x830 lib/debugobjects.c:380 debug_object_init lib/debugobjects.c:393 [inline] debug_object_activate+0x274/0x450 lib/debugobjects.c:474 debug_rcu_head_queue kernel/rcu/rcu.h:152 [inline] __call_rcu.constprop.0+0x31/0x7e0 kernel/rcu/tree.c:3050 __purge_vmap_area_lazy+0x162/0x250 mm/vmalloc.c:706 vm_unmap_aliases mm/vmalloc.c:1125 [inline] vm_unmap_aliases+0x324/0x3f0 mm/vmalloc.c:1088 change_page_attr_set_clr+0x543/0xa40 arch/x86/mm/pageattr.c:1472 change_page_attr_clear arch/x86/mm/pageattr.c:1532 [inline] set_memory_ro+0x68/0x80 arch/x86/mm/pageattr.c:1761 bpf_jit_binary_lock_ro include/linux/filter.h:628 [inline] bpf_int_jit_compile+0x441/0x5fe arch/x86/net/bpf_jit_comp.c:1192 bpf_prog_select_runtime+0xde/0x4f0 kernel/bpf/core.c:1455 bpf_migrate_filter net/core/filter.c:1060 [inline] bpf_prepare_filter net/core/filter.c:1108 [inline] bpf_prepare_filter+0x746/0xa70 net/core/filter.c:1074 __get_filter+0x196/0x240 net/core/filter.c:1301 sk_attach_filter+0x19/0x80 net/core/filter.c:1316 sock_setsockopt+0x10b9/0x1880 net/core/sock.c:927 SYSC_setsockopt net/socket.c:1861 [inline] SyS_setsockopt+0x1a4/0x1e0 net/socket.c:1844 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c829 RSP: 002b:00007f13cdbd2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000501fc0 RCX: 000000000045c829 RDX: 000000000000001a RSI: 0000000000000001 RDI: 0000000000000005 RBP: 000000000078bf00 R08: 0000000000000010 R09: 0000000000000000 R10: 0000000020000140 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000a54 R14: 00000000004ccfc4 R15: 00007f13cdbd36d4 INFO: rcu_sched detected stalls on CPUs/tasks: 1-...: (1 GPs behind) idle=6ae/140000000000001/0 softirq=12104/12106 fqs=4 (detected by 0, t=10560 jiffies, g=705, c=704, q=4) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7925 Comm: syz-executor.1 Not tainted 4.14.177-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88804bc20580 task.stack: ffff88804bc28000 RIP: 0010:__read_once_size include/linux/compiler.h:183 [inline] RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline] RIP: 0010:smp_call_function_single+0xfd/0x370 kernel/smp.c:302 RSP: 0018:ffff88804bc2fb00 EFLAGS: 00000297 RAX: ffff88804bc20580 RBX: 1ffff11009785f64 RCX: 0000000000000830 RDX: 0000000000000000 RSI: 00000000000000fb RDI: 0000000000000830 RBP: ffff88804bc2fbc0 R08: dffffc0000000000 R09: ffffffff8a07f460 R10: ffff88804bc2fd58 R11: ffff88804bc20580 R12: 0000000000000000 R13: ffff88804bc2fbf0 R14: 0000000000000001 R15: ffff88804bfca6fc FS: 0000000001831940(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000558fb2286238 CR3: 0000000094ead000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: task_function_call+0xb2/0x110 kernel/events/core.c:115 event_function_call+0x1e8/0x3c0 kernel/events/core.c:277 perf_remove_from_context+0x89/0x170 kernel/events/core.c:1951 perf_event_release_kernel+0xd8/0x870 kernel/events/core.c:4352 perf_release+0x33/0x40 kernel/events/core.c:4435 __fput+0x25f/0x790 fs/file_table.c:210 task_work_run+0x113/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1d6/0x220 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x416421 RSP: 002b:00007fffcaa91510 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000009 RCX: 0000000000416421 RDX: 0000000000000000 RSI: 0000000000001ca6 RDI: 0000000000000008 RBP: 0000000000000001 R08: 00000000eac1dca6 R09: 00000000eac1dcaa R10: 00007fffcaa91600 R11: 0000000000000293 R12: 000000000078c900 R13: 000000000078c900 R14: ffffffffffffffff R15: 000000000078c0ec Code: d4 08 00 48 8b 54 24 10 4c 89 e9 8b 7c 24 1c 48 8d 74 24 40 e8 f5 fa ff ff 41 89 c4 8b 44 24 58 a8 01 74 10 e8 a5 d4 08 00 f3 90 <8b> 54 24 58 83 e2 01 75 f0 e8 95 d4 08 00 e8 90 d4 08 00 bf 01 rcu_sched kthread starved for 10551 jiffies! g705 c704 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 rcu_sched R running task 29984 9 2 0x80000000 Call Trace: schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x43c/0xe40 kernel/time/timer.c:1746 rcu_gp_kthread+0xb8e/0x1ce0 kernel/rcu/tree.c:2255 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404