Unknown ioctl 20502
list_add corruption. next->prev should be prev (ffff88805eb87ca8), but was ffff888082d46100. (next=ffff88809dd63698).
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kernel BUG at lib/list_debug.c:23!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 7001 Comm: kworker/1:3 Not tainted 4.14.158-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events p9_poll_workfn
task: ffff88805eb7a340 task.stack: ffff88805eb80000
RIP: 0010:__list_add_valid.cold+0xf/0x3c lib/list_debug.c:23
RSP: 0018:ffff88805eb87c20 EFLAGS: 00010286
kobject: '0:45' (ffff888090da1510): fill_kobj_path: path = '/devices/virtual/bdi/0:45'
RAX: 0000000000000075 RBX: ffff88805eb87ca8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff86cc43c0 RDI: ffffed100bd70f7a
RBP: ffff88805eb87c38 R08: 0000000000000075 R09: ffff88805eb7ac30
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809dd63698
R13: ffff88805eb87ca8 R14: ffff88809dd63670 R15: ffff88809dd63698
FS:  0000000000000000(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000a4fd3000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_add include/linux/list.h:60 [inline]
 list_add include/linux/list.h:79 [inline]
 list_move include/linux/list.h:171 [inline]
 p9_conn_cancel+0x1e3/0x880 net/9p/trans_fd.c:216
 p9_poll_mux net/9p/trans_fd.c:632 [inline]
 p9_poll_workfn+0x27e/0x3e0 net/9p/trans_fd.c:1123
 process_one_work+0x863/0x1600 kernel/workqueue.c:2114
 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248
 kthread+0x319/0x430 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: e9 7c fe eb d5 4c 89 e7 e8 2a e9 7c fe eb a3 4c 89 f7 e8 20 e9 7c fe e9 56 ff ff ff 4c 89 e1 48 c7 c7 80 0d 04 87 e8 bf 8f 40 fe <0f> 0b 48 89 f2 4c 89 e1 4c 89 ee 48 c7 c7 c0 0e 04 87 e8 a8 8f 
RIP: __list_add_valid.cold+0xf/0x3c lib/list_debug.c:23 RSP: ffff88805eb87c20
---[ end trace e2d31aba3288bade ]---