netlink: 23 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. INFO: rcu_preempt self-detected stall on CPU 1-...: (1 GPs behind) idle=b12/140000000000002/0 softirq=60102/60103 fqs=9 (t=10500 jiffies g=17969 c=17968 q=405) rcu_preempt kthread starved for 5798 jiffies! g17969 c17968 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 rcu_preempt R running task 29920 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: 26384 Comm: syz-executor.4 Not tainted 4.14.172-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:__kernel_text_address+0x0/0x30 kernel/extable.c:104 RSP: 0018:ffff8880aeb077e8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: dffffc0000000000 RBX: ffff8880aeb07808 RCX: 0000000000000000 RDX: 1ffff11015d60f0a RSI: ffff8880aeb07710 RDI: ffffffff841b7f44 RBP: ffff8880aeb07850 R08: 0000000000000001 R09: ffff8880aeb07be0 R10: ffff8880aeb0783d R11: 0000000000058071 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88808475e0c0 R15: ffff88808ee628bf unwind_get_return_address arch/x86/kernel/unwind_orc.c:255 [inline] unwind_get_return_address+0x5a/0xa0 arch/x86/kernel/unwind_orc.c:250 __save_stack_trace+0x7b/0xd0 arch/x86/kernel/stacktrace.c:45 save_stack+0x32/0xa0 mm/kasan/kasan.c:447 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_trace+0x144/0x7b0 mm/slab.c:3659 __do_kmalloc_node mm/slab.c:3681 [inline] __kmalloc_node_track_caller+0x38/0x70 mm/slab.c:3696 __kmalloc_reserve.isra.0+0x35/0xd0 net/core/skbuff.c:137 __alloc_skb+0xca/0x4c0 net/core/skbuff.c:205 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:preempt_count_add+0xa0/0x170 kernel/sched/core.c:3111 RSP: 0018:ffff88809f0ef980 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000004 RBX: ffff88809630ee40 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff88808475e990 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000048065 R10: ffff88808475e990 R11: ffff88808475e0c0 R12: ffff88809630ee78 R13: ffff88809630eec0 R14: ffff88809630ef00 R15: ffff8880472de978 bit_spin_lock include/linux/bit_spinlock.h:25 [inline] hlist_bl_lock include/linux/list_bl.h:122 [inline] ___d_drop+0xbc/0x350 fs/dcache.c:501 __d_drop fs/dcache.c:511 [inline] __dentry_kill+0x12c/0x550 fs/dcache.c:586 dentry_kill fs/dcache.c:632 [inline] dput.part.0+0x4be/0x710 fs/dcache.c:847 dput+0x1b/0x30 fs/dcache.c:811 __fput+0x445/0x790 fs/file_table.c:228 task_work_run+0x113/0x190 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x9f2/0x2b00 kernel/exit.c:858 do_group_exit+0x100/0x310 kernel/exit.c:955 get_signal+0x385/0x1ca0 kernel/signal.c:2418 do_signal+0x7c/0x1690 arch/x86/kernel/signal.c:814 exit_to_usermode_loop+0x159/0x220 arch/x86/entry/common.c:160 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: 0033:0x45c479 RSP: 002b:00007f67c2bbdc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffef RBX: 00007f67c2bbe6d4 RCX: 000000000045c479 RDX: 00000000000001ff RSI: 0000000020000080 RDI: ffffffffffffff9c RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000730 R14: 00000000004c9b3c R15: 000000000076bf2c INFO: rcu_sched detected stalls on CPUs/tasks: 1-...: (1 GPs behind) idle=b12/140000000000000/0 softirq=60102/60103 fqs=9 (detected by 0, t=10575 jiffies, g=14091, c=14090, q=16) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 13105 Comm: syz-executor.1 Not tainted 4.14.172-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88808fe0e2c0 task.stack: ffff8880a5440000 RIP: 0010:page_remove_file_rmap mm/rmap.c:1231 [inline] RIP: 0010:page_remove_rmap+0x34f/0x920 mm/rmap.c:1296 RSP: 0018:ffff8880a54477a0 EFLAGS: 00000217 RAX: ffff88808fe0e2c0 RBX: 0000000000000000 RCX: 1ffffffff0f417ad RDX: 0000000000000000 RSI: ffffffff86e453c0 RDI: ffffea000173b500 RBP: ffffea000173b500 R08: 0000000000000000 R09: 0000000000020012 R10: ffff88808fe0eb68 R11: ffff88808fe0e2c0 R12: ffffea000173b500 R13: ffffea000173b520 R14: dead000000000100 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c420c2de80 CR3: 000000005a54e000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: zap_pte_range mm/memory.c:1342 [inline] zap_pmd_range mm/memory.c:1444 [inline] zap_pud_range mm/memory.c:1473 [inline] zap_p4d_range mm/memory.c:1494 [inline] unmap_page_range+0xa60/0x1930 mm/memory.c:1515 unmap_single_vma+0x147/0x2b0 mm/memory.c:1560 unmap_vmas+0x9d/0x160 mm/memory.c:1590 exit_mmap+0x26d/0x4b0 mm/mmap.c:3056 __mmput kernel/fork.c:930 [inline] mmput+0x103/0x420 kernel/fork.c:951 exit_mm kernel/exit.c:545 [inline] do_exit+0x933/0x2b00 kernel/exit.c:845 do_group_exit+0x100/0x310 kernel/exit.c:955 get_signal+0x385/0x1ca0 kernel/signal.c:2418 do_signal+0x7c/0x1690 arch/x86/kernel/signal.c:814 exit_to_usermode_loop+0x159/0x220 arch/x86/entry/common.c:160 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: 0033:0x45c479 RSP: 002b:00007fcba318acf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000076bf28 RCX: 000000000045c479 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000076bf28 RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000076bf2c R13: 00007fffb563a22f R14: 00007fcba318b9c0 R15: 000000000076bf2c Code: 00 00 48 8b 3c dd 00 20 92 88 be 0c 00 00 00 e8 58 8a f8 ff 48 89 ef e8 10 9c 09 00 e9 4b fd ff ff e8 56 8f dd ff f0 83 45 18 ff <0f> 89 57 fe ff ff 49 c7 c4 ff ff ff ff e8 3f 8f dd ff 48 89 ea rcu_sched kthread starved for 5873 jiffies! g14091 c14090 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 rcu_sched R running task 29920 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 device syz_tun left promiscuous mode bridge17: port 1(syz_tun) entered disabled state