IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready
8021q: adding VLAN 0 to HW filter on device batadv0
list_add double add: new=ffff8880a0a12b98, prev=ffff8880a0a12b98, next=ffff88808deec7c0.
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:31!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 9688 Comm: syz-executor.3 Not tainted 4.14.179-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888087f14140 task.stack: ffff8880780c8000
RIP: 0010:__list_add_valid+0xaa/0xb0 lib/list_debug.c:29
RSP: 0018:ffff8880780cf9b0 EFLAGS: 00010282
RAX: 0000000000000058 RBX: ffff88808deec7c0 RCX: 0000000000000000
RDX: 0000000000000058 RSI: ffffffff86cc2c40 RDI: ffffed100f019f2d
RBP: ffff8880780cf9c8 R08: ffff888087f14a10 R09: 0000000000000000
R10: 0000000000000000 R11: dffffc0000000000 R12: ffff8880a0a12b98
R13: ffff8880a0a12b70 R14: ffff8880a0a12b98 R15: ffff8880a0a12b98
FS:  00007fb48ef2a700(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000714158 CR3: 0000000088551000 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]
 p9_fd_request+0xdd/0x2b0 net/9p/trans_fd.c:679
 p9_client_rpc+0x1fd/0xe80 net/9p/client.c:774
 p9_client_clunk+0x7b/0x120 net/9p/client.c:1507
 v9fs_dentry_release+0x5e/0xc0 fs/9p/vfs_dentry.c:73
 __dentry_kill+0x330/0x540 fs/dcache.c:596
 dentry_kill fs/dcache.c:632 [inline]
 dput.part.27+0x49a/0x610 fs/dcache.c:847
 dput fs/dcache.c:811 [inline]
 do_one_tree+0x36/0x40 fs/dcache.c:1507
 shrink_dcache_for_umount+0x56/0x110 fs/dcache.c:1521
 generic_shutdown_super+0x61/0x330 fs/super.c:431
 kill_anon_super+0x37/0x50 fs/super.c:1006
 v9fs_kill_super+0x39/0x90 fs/9p/vfs_super.c:230
 deactivate_locked_super+0x62/0xb0 fs/super.c:319
 deactivate_super+0x7d/0x90 fs/super.c:350
 cleanup_mnt+0x9f/0x130 fs/namespace.c:1183
 __cleanup_mnt+0xd/0x10 fs/namespace.c:1190
 task_work_run+0xe5/0x170 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x16a/0x1b0 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x416/0x5b0 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45a6f9
RSP: 002b:00007fb48ef29c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000002 RCX: 000000000045a6f9
RDX: 0000000000000000 RSI: 000000000000000b RDI: 0000000020000140
RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb48ef2a6d4
R13: 00000000004cb211 R14: 00000000004e4988 R15: 00000000ffffffff
Code: 75 e8 eb a9 48 89 f7 48 89 75 e8 e8 11 ff 7e fe 48 8b 75 e8 eb bb 48 89 f2 48 89 d9 4c 89 e6 48 c7 c7 20 ce 03 87 e8 b3 7e 44 fe <0f> 0b 0f 1f 40 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 41 
RIP: __list_add_valid+0xaa/0xb0 lib/list_debug.c:29 RSP: ffff8880780cf9b0
---[ end trace 7ff0cc67b8a41d26 ]---