list_add corruption. prev->next should be next (ffffffff8a1dca60), but was ffff8881bfaa18f0. (prev=ffff8881b6436270). ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:28! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 7682 Comm: blkid Not tainted 4.20.0-rc6-next-20181210+ #164 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__list_add_valid.cold.2+0x23/0x2a lib/list_debug.c:26 Code: e8 00 1f d2 fd 0f 0b 48 89 d9 48 c7 c7 20 e6 80 88 e8 ef 1e d2 fd 0f 0b 48 89 f1 48 c7 c7 a0 e6 80 88 48 89 de e8 db 1e d2 fd <0f> 0b 90 90 90 90 90 55 48 89 e5 41 57 41 56 49 be 00 00 00 00 00 RSP: 0000:ffff8881dac06ce0 EFLAGS: 00010286 kobject: 'loop0' (00000000b22d2c79): kobject_uevent_env RAX: 0000000000000075 RBX: ffffffff8a1dca60 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff816621c5 RDI: 0000000000000005 RBP: ffff8881dac06cf8 R08: ffff8881bcd40140 R09: ffffed103b585020 R10: ffffed103b585020 R11: ffff8881dac28107 R12: ffff8881bec7f930 R13: ffff8881bec7f6c0 R14: ffffffff8a1dc820 R15: ffffffff8a1dcab0 FS: 00007fbf00019740(0000) GS:ffff8881dac00000(0000) knlGS:0000000000000000 kobject: 'loop0' (00000000b22d2c79): fill_kobj_path: path = '/devices/virtual/block/loop0' CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbeff8b89a0 CR3: 00000001d96d8000 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] neigh_alloc net/core/neighbour.c:395 [inline] ___neigh_create+0x14b7/0x2600 net/core/neighbour.c:553 kobject: 'loop0' (00000000b22d2c79): kobject_uevent_env kobject: 'loop0' (00000000b22d2c79): fill_kobj_path: path = '/devices/virtual/block/loop0' __neigh_create+0x30/0x40 net/core/neighbour.c:640 ip6_finish_output2+0xa64/0x2940 net/ipv6/ip6_output.c:117 ip6_finish_output+0x58c/0xc60 net/ipv6/ip6_output.c:154 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip6_output+0x232/0x9d0 net/ipv6/ip6_output.c:171 dst_output include/net/dst.h:444 [inline] NF_HOOK include/linux/netfilter.h:289 [inline] ndisc_send_skb+0x1005/0x1560 net/ipv6/ndisc.c:491 ndisc_send_rs+0x134/0x6e0 net/ipv6/ndisc.c:685 addrconf_rs_timer+0x314/0x690 net/ipv6/addrconf.c:3840 call_timer_fn+0x272/0x920 kernel/time/timer.c:1325 expire_timers kernel/time/timer.c:1362 [inline] __run_timers+0x7e5/0xc70 kernel/time/timer.c:1681 kobject: 'loop0' (00000000b22d2c79): kobject_uevent_env kobject: 'loop0' (00000000b22d2c79): fill_kobj_path: path = '/devices/virtual/block/loop0' run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1694 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 kobject: 'loop0' (00000000b22d2c79): kobject_uevent_env kobject: 'loop0' (00000000b22d2c79): fill_kobj_path: path = '/devices/virtual/block/loop0' apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:lock_is_held_type+0x58/0x210 kernel/locking/lockdep.c:3875 Code: c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 6e 01 00 00 8b 83 7c 08 00 00 85 c0 0f 85 46 01 00 00 <48> c7 c7 a8 40 72 89 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 RSP: 0000:ffff8881b68ff4e8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff8881bcd40140 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff8881bcd409bc RBP: ffff8881b68ff508 R08: ffff8881bcd40140 R09: ffffed103b585b5f R10: ffffed103b585b5f R11: ffff8881dac2dafb R12: ffffea000861c440 R13: ffffffff897a0c40 R14: ffff8881b68ff958 R15: dffffc0000000000 lock_is_held include/linux/lockdep.h:339 [inline] rcu_read_lock_held+0xa9/0xc0 kernel/rcu/update.c:281 xa_entry include/linux/xarray.h:902 [inline] xas_reload include/linux/xarray.h:1250 [inline] filemap_map_pages+0x1256/0x1a20 mm/filemap.c:2625 do_fault_around mm/memory.c:3386 [inline] do_read_fault mm/memory.c:3420 [inline] do_fault mm/memory.c:3551 [inline] handle_pte_fault mm/memory.c:3782 [inline] __handle_mm_fault+0x456b/0x5b70 mm/memory.c:3906 handle_mm_fault+0x54f/0xc70 mm/memory.c:3943 do_user_addr_fault arch/x86/mm/fault.c:1475 [inline] __do_page_fault+0x5f6/0xd70 arch/x86/mm/fault.c:1541 do_page_fault+0xf2/0x7e0 arch/x86/mm/fault.c:1572 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1143 RIP: 0033:0x7fbeff8b89a0 Code: Bad RIP value. RSP: 002b:00007ffc7fb18578 EFLAGS: 00010202 RAX: 00007ffc7fb185a0 RBX: 0000000000000003 RCX: 00007ffc7fb18668 RDX: 00007ffc7fb18580 RSI: 00007fbeffbf8a50 RDI: 00007ffc7fb186f2 RBP: 0000000001b5e040 R08: 00007ffc7fb1866c R09: 0000000000000000 R10: 0000000000000000 R11: 00007fbeff8a5a30 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000005 Modules linked in: ---[ end trace 0f84eb25ef10946b ]--- RIP: 0010:__list_add_valid.cold.2+0x23/0x2a lib/list_debug.c:26 Code: e8 00 1f d2 fd 0f 0b 48 89 d9 48 c7 c7 20 e6 80 88 e8 ef 1e d2 fd 0f 0b 48 89 f1 48 c7 c7 a0 e6 80 88 48 89 de e8 db 1e d2 fd <0f> 0b 90 90 90 90 90 55 48 89 e5 41 57 41 56 49 be 00 00 00 00 00 RSP: 0000:ffff8881dac06ce0 EFLAGS: 00010286 RAX: 0000000000000075 RBX: ffffffff8a1dca60 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff816621c5 RDI: 0000000000000005 RBP: ffff8881dac06cf8 R08: ffff8881bcd40140 R09: ffffed103b585020 R10: ffffed103b585020 R11: ffff8881dac28107 R12: ffff8881bec7f930 R13: ffff8881bec7f6c0 R14: ffffffff8a1dc820 R15: ffffffff8a1dcab0 FS: 00007fbf00019740(0000) GS:ffff8881dac00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbeff8b8976 CR3: 00000001d96d8000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400