hrtimer: interrupt took 30350 ns list_add corruption. next->prev should be prev (ffff8881bf59a6f0), but was ffff8881ce65b030. (next=ffffffff8a1dca60). ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:25! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 6144 Comm: syz-executor3 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+0xf/0x2a lib/list_debug.c:23 Code: e5 80 88 e8 11 1f d2 fd 0f 0b 48 89 de 48 c7 c7 60 e5 80 88 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 kobject: 'loop0' (00000000b6bdf3af): kobject_uevent_env RSP: 0018:ffff8881dad06ce0 EFLAGS: 00010286 RAX: 0000000000000075 RBX: ffffffff8a1dca60 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff816621c5 RDI: 0000000000000005 RBP: ffff8881dad06cf8 R08: ffff8881c3c26380 R09: 0000000000000002 kobject: 'loop0' (00000000b6bdf3af): fill_kobj_path: path = '/devices/virtual/block/loop0' R10: 0000000000000000 R11: ffff8881c3c26380 R12: ffff8881cd8822b0 R13: ffff8881cd882040 R14: ffffffff8a1dc820 R15: ffffffff8a1dcab0 FS: 0000000002108940(0000) GS:ffff8881dad00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kobject: 'loop5' (000000004468fff0): kobject_uevent_env CR2: 0000000000708158 CR3: 00000001b3d34000 CR4: 00000000001406e0 kobject: 'loop5' (000000004468fff0): fill_kobj_path: path = '/devices/virtual/block/loop5' 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 __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 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 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:766 [inline] RIP: 0010:kmem_cache_free+0x1ec/0x290 mm/slab.c:3748 Code: 3d 7e 0f 85 f4 fe ff ff e8 a0 71 3c ff e9 ea fe ff ff e8 07 26 c2 ff 48 83 3d 0f 35 ae 07 00 0f 84 9d 00 00 00 4c 89 ef 57 9d <0f> 1f 44 00 00 e9 bf fe ff ff 48 63 73 74 4c 89 e7 e8 4e 25 d0 01 RSP: 0018:ffff8881c3c2f778 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff8881d96a2600 RCX: 1ffff11038784d84 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000282 RBP: ffff8881c3c2f798 R08: ffff8881c3c26c20 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8881c3c26380 R12: ffff888186418b40 R13: 0000000000000282 R14: ffffffff8629e068 R15: 0000000000000000 sk_prot_free net/core/sock.c:1512 [inline] __sk_destruct+0x728/0xa80 net/core/sock.c:1596 sk_destruct+0x78/0x90 net/core/sock.c:1604 __sk_free+0xcf/0x300 net/core/sock.c:1615 sk_free+0x42/0x50 net/core/sock.c:1626 sock_put include/net/sock.h:1703 [inline] tcp_close+0xcc1/0x11e0 net/ipv4/tcp.c:2488 inet_release+0x104/0x1f0 net/ipv4/af_inet.c:428 __sock_release+0xd7/0x250 net/socket.c:580 sock_close+0x19/0x20 net/socket.c:1142 __fput+0x3bc/0xa90 fs/file_table.c:279 ____fput+0x15/0x20 fs/file_table.c:312 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 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: 0033:0x411110 Code: 01 f0 ff ff 0f 83 60 19 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 9d 4e 63 00 00 75 14 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 34 19 00 00 c3 48 83 ec 08 e8 0a fc ff ff RSP: 002b:00007ffdce11c5d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 00007ffdce11c600 RCX: 0000000000411110 RDX: 00000000000000e0 RSI: 00007ffdce11c9a0 RDI: 0000000000000003 RBP: 000000000070de80 R08: 0000000000006000 R09: 0000000000004000 R10: 00007ffdce11c700 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000000 R14: 0000000000000000 R15: 000000000070de80 Modules linked in: ---[ end trace 3d87fee02b75e1a9 ]--- RIP: 0010:__list_add_valid.cold.2+0xf/0x2a lib/list_debug.c:23 Code: e5 80 88 e8 11 1f d2 fd 0f 0b 48 89 de 48 c7 c7 60 e5 80 88 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 kobject: 'loop1' (0000000097cbc2ef): kobject_uevent_env RSP: 0018:ffff8881dad06ce0 EFLAGS: 00010286 RAX: 0000000000000075 RBX: ffffffff8a1dca60 RCX: 0000000000000000 kobject: 'loop1' (0000000097cbc2ef): fill_kobj_path: path = '/devices/virtual/block/loop1' RDX: 0000000000000000 RSI: ffffffff816621c5 RDI: 0000000000000005 RBP: ffff8881dad06cf8 R08: ffff8881c3c26380 R09: 0000000000000002 R10: 0000000000000000 R11: ffff8881c3c26380 R12: ffff8881cd8822b0 R13: ffff8881cd882040 R14: ffffffff8a1dc820 R15: ffffffff8a1dcab0 FS: 0000000002108940(0000) GS:ffff8881dad00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000708158 CR3: 00000001b3d34000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400