list_add corruption. prev->next should be next (ffff8801dae26708), but was 0000000000000000. (prev=ffff8801dae26740). ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:28! invalid opcode: 0000 [#1] SMP KASAN CPU: 0 PID: 14005 Comm: syz-executor4 Not tainted 4.18.0-rc3-next-20180706+ #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__list_add_valid.cold.0+0x23/0x25 lib/list_debug.c:26 Code: e8 9f 72 57 fe eb 97 48 89 d9 48 c7 c7 60 80 1a 88 e8 72 b8 ff fd 0f 0b 48 89 f1 48 c7 c7 20 81 1a 88 48 89 de e8 5e b8 ff fd <0f> 0b 4c 89 e2 48 89 de 48 c7 c7 60 82 1a 88 e8 4a b8 ff fd 0f 0b RSP: 0018:ffff8801dae079c0 EFLAGS: 00010086 RAX: 0000000000000075 RBX: ffff8801dae26708 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81634381 RDI: 0000000000000001 RBP: ffff8801dae079d8 R08: ffff88018f63e100 R09: ffffed003b5c4fc0 R10: ffffed003b5c4fc0 R11: ffff8801dae27e07 R12: ffff8801dae26740 R13: ffff8801dae07ab8 R14: ffff8801dae26740 R15: 0000000000000001 FS: 00007fb77b0f6700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000704914 CR3: 00000001a0bfa000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_add include/linux/list.h:60 [inline] list_add_tail include/linux/list.h:93 [inline] __cpu_stop_queue_work kernel/stop_machine.c:72 [inline] cpu_stop_queue_work+0x248/0x460 kernel/stop_machine.c:87 stop_one_cpu_nowait+0xd3/0x100 kernel/stop_machine.c:341 watchdog_timer_fn+0x93/0x2e0 kernel/watchdog.c:367 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0x3eb/0x10c0 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x2f3/0x750 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline] smp_apic_timer_interrupt+0x165/0x730 arch/x86/kernel/apic/apic.c:1050 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:867 RIP: 0010:check_kcov_mode kernel/kcov.c:67 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x20/0x50 kernel/kcov.c:101 Code: 4c d8 20 4c 89 08 5d c3 66 90 55 65 48 8b 04 25 40 ee 01 00 65 8b 15 5f 73 85 7e 48 89 e5 81 e2 00 01 1f 00 48 8b 75 08 75 2b <8b> 90 98 12 00 00 83 fa 02 75 20 48 8b 88 a0 12 00 00 8b 80 9c 12 RSP: 0018:ffff8801942bdb38 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff88018f63e100 RBX: ffff8801942bde80 RCX: ffffffff87998d69 RDX: 0000000000000000 RSI: ffffffff87998da2 RDI: 0000000000000005 RBP: ffff8801942bdb38 R08: ffff88018f63e100 R09: fffff94000e1377e R10: fffff94000e1377e R11: ffffea000709bbf7 R12: 0000000000000017 R13: ffff8801c931b040 R14: ffff8801c92e2482 R15: ffff8801942bdc10 xas_descend+0x1b2/0x5f0 lib/xarray.c:175 xas_load+0x145/0x1e0 lib/xarray.c:210 xas_find+0x69b/0x8f0 lib/xarray.c:1038 xas_next_entry include/linux/xarray.h:892 [inline] find_get_entries+0x973/0x1410 mm/filemap.c:1598 shmem_undo_range+0x38e/0x29a0 mm/shmem.c:795 shmem_truncate_range+0x27/0xa0 mm/shmem.c:971 shmem_evict_inode+0x3b2/0xcb0 mm/shmem.c:1071 evict+0x4ae/0x990 fs/inode.c:558 iput_final fs/inode.c:1508 [inline] iput+0x635/0xaa0 fs/inode.c:1534 dentry_unlink_inode+0x4ae/0x640 fs/dcache.c:377 __dentry_kill+0x44c/0x7a0 fs/dcache.c:569 dentry_kill+0xc9/0x5a0 fs/dcache.c:688 dput.part.26+0x66b/0x7a0 fs/dcache.c:849 dput+0x15/0x20 fs/dcache.c:831 __fput+0x558/0x930 fs/file_table.c:235 ____fput+0x15/0x20 fs/file_table.c:251 task_work_run+0x1ec/0x2a0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x1b08/0x2750 kernel/exit.c:869 do_group_exit+0x177/0x440 kernel/exit.c:972 get_signal+0x88e/0x1970 kernel/signal.c:2467 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e0/0x370 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455ba9 Code: 1d ba 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 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fb77b0f5ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000072bec0 RCX: 0000000000455ba9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000072bec0 RBP: 000000000072bec0 R08: 0000000000000034 R09: 000000000072bea0 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff8548d94f R14: 00007fb77b0f69c0 R15: 0000000000000000 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace 7e956879762cc3d4 ]--- RIP: 0010:__list_add_valid.cold.0+0x23/0x25 lib/list_debug.c:26 Code: e8 9f 72 57 fe eb 97 48 89 d9 48 c7 c7 60 80 1a 88 e8 72 b8 ff fd 0f 0b 48 89 f1 48 c7 c7 20 81 1a 88 48 89 de e8 5e b8 ff fd <0f> 0b 4c 89 e2 48 89 de 48 c7 c7 60 82 1a 88 e8 4a b8 ff fd 0f 0b RSP: 0018:ffff8801dae079c0 EFLAGS: 00010086 RAX: 0000000000000075 RBX: ffff8801dae26708 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81634381 RDI: 0000000000000001 RBP: ffff8801dae079d8 R08: ffff88018f63e100 R09: ffffed003b5c4fc0 R10: ffffed003b5c4fc0 R11: ffff8801dae27e07 R12: ffff8801dae26740 R13: ffff8801dae07ab8 R14: ffff8801dae26740 R15: 0000000000000001 FS: 00007fb77b0f6700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000704914 CR3: 00000001a0bfa000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400