watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor5:4712] Modules linked in: irq event stamp: 6609477 hardirqs last enabled at (6609476): [] restore_regs_and_iret+0x0/0x1d hardirqs last disabled at (6609477): [] apic_timer_interrupt+0x98/0xb0 arch/x86/entry/entry_64.S:783 softirqs last enabled at (5344): [] __do_softirq+0x74d/0xbd0 kernel/softirq.c:310 softirqs last disabled at (5457): [] invoke_softirq kernel/softirq.c:364 [inline] softirqs last disabled at (5457): [] irq_exit+0x1d3/0x210 kernel/softirq.c:405 CPU: 0 PID: 4712 Comm: syz-executor5 Not tainted 4.13.0-rc6-next-20170822+ #6 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801d175c0c0 task.stack: ffff8801d24d0000 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:814 [inline] RIP: 0010:lock_acquire+0x256/0x580 kernel/locking/lockdep.c:4005 RSP: 0018:ffff8801db2077b8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: dffffc0000000000 RBX: ffff8801d175c0c0 RCX: 0000000000000000 RDX: 1ffffffff0b5915d RSI: ffffffff84d9e496 RDI: 0000000000000286 RBP: ffff8801db2078b0 R08: ffff8801db207230 R09: ffff8801db207228 R10: ffff8801db2071a0 R11: 1ffff1003a2ebaab R12: 1ffff1003b640efd R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 FS: 00007f019b4f1700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004c3d10 CR3: 00000001d3050000 CR4: 00000000001406f0 DR0: 0000000020001008 DR1: 0000000020001008 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: call_timer_fn+0x20a/0x850 kernel/time/timer.c:1272 expire_timers kernel/time/timer.c:1314 [inline] __run_timers+0x7fd/0xb90 kernel/time/timer.c:1608 run_timer_softirq+0x67/0x80 kernel/time/timer.c:1623 __do_softirq+0x2bb/0xbd0 kernel/softirq.c:284 invoke_softirq kernel/softirq.c:364 [inline] irq_exit+0x1d3/0x210 kernel/softirq.c:405 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x76/0xa0 arch/x86/kernel/apic/apic.c:1044 apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:783 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:814 [inline] RIP: 0010:lock_acquire+0x256/0x580 kernel/locking/lockdep.c:4005 RSP: 0018:ffff8801d24d6b80 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: dffffc0000000000 RBX: ffff8801d175c0c0 RCX: 0000000000000000 RDX: 1ffffffff0b5915d RSI: ffffffff81a32ed6 RDI: 0000000000000286 RBP: ffff8801d24d6c78 R08: ffff8801d24d65f8 R09: ffff8801d24d65f0 R10: ffff8801d24d6568 R11: 1ffff1003a2ebaab R12: 1ffff1003a49ad76 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001 down_read+0x96/0x150 kernel/locking/rwsem.c:23 anon_vma_lock_read include/linux/rmap.h:129 [inline] rmap_walk_anon_lock mm/rmap.c:1665 [inline] rmap_walk_anon+0x98c/0xd30 mm/rmap.c:1695 rmap_walk+0x218/0x2e0 mm/rmap.c:1782 remove_migration_ptes+0x151/0x1e0 mm/migrate.c:297 __unmap_and_move+0x52f/0x1190 mm/migrate.c:1090 unmap_and_move mm/migrate.c:1170 [inline] migrate_pages+0x956/0x2610 mm/migrate.c:1404 do_mbind+0xa98/0xce0 mm/mempolicy.c:1239 SYSC_mbind mm/mempolicy.c:1341 [inline] SyS_mbind+0x13b/0x150 mm/mempolicy.c:1323 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x4512e9 RSP: 002b:00007f019b4f0c08 EFLAGS: 00000216 ORIG_RAX: 00000000000000ed RAX: ffffffffffffffda RBX: 00000000007180a8 RCX: 00000000004512e9 RDX: 0000000000000001 RSI: 0000000000c00000 RDI: 0000000020012000 RBP: 0000000000000086 R08: 0000000000000002 R09: 0000000000000003 R10: 0000000020527ff8 R11: 0000000000000216 R12: 00000000004b9639 R13: 00000000ffffffff R14: 0000000020bf5000 R15: 0000000000002000 Code: 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 95 02 00 00 48 83 3d 21 8f 57 04 00 0f 84 d1 01 00 00 48 8b bd 20 ff ff ff 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 49 c7 04 04 00 00