list_del corruption, ffff8880537e8fb0->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:45!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 7879 Comm: kworker/0:4 Not tainted 4.19.91-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events p9_read_work
RIP: 0010:__list_del_entry_valid.cold+0x23/0x4f lib/list_debug.c:45
Code: e8 75 1e f3 fd 0f 0b 4c 89 f6 48 c7 c7 60 58 ea 87 e8 64 1e f3 fd 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 a0 57 ea 87 e8 50 1e f3 fd <0f> 0b 4c 89 e2 4c 89 f6 48 c7 c7 00 58 ea 87 e8 3c 1e f3 fd 0f 0b
RSP: 0018:ffff888058437c48 EFLAGS: 00010286
RAX: 000000000000004e RBX: ffff8880537e8f00 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8155bb16 RDI: ffffed100b086f7b
RBP: ffff888058437c60 R08: 000000000000004e R09: ffffed1015d05079
R10: ffffed1015d05078 R11: ffff8880ae8283c7 R12: dead000000000200
R13: dead000000000100 R14: ffff8880537e8fb0 R15: ffff8880537e8fb0
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000738000 CR3: 000000008bcdf000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:117 [inline]
 list_del include/linux/list.h:125 [inline]
 p9_read_work+0x9e5/0x1050 net/9p/trans_fd.c:378
 process_one_work+0x989/0x1750 kernel/workqueue.c:2153
 worker_thread+0x98/0xe40 kernel/workqueue.c:2296
 kthread+0x354/0x420 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Modules linked in:
---[ end trace 69fb926131a185e2 ]---
RIP: 0010:__list_del_entry_valid.cold+0x23/0x4f lib/list_debug.c:45
Code: e8 75 1e f3 fd 0f 0b 4c 89 f6 48 c7 c7 60 58 ea 87 e8 64 1e f3 fd 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 a0 57 ea 87 e8 50 1e f3 fd <0f> 0b 4c 89 e2 4c 89 f6 48 c7 c7 00 58 ea 87 e8 3c 1e f3 fd 0f 0b
RSP: 0018:ffff888058437c48 EFLAGS: 00010286
RAX: 000000000000004e RBX: ffff8880537e8f00 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8155bb16 RDI: ffffed100b086f7b
RBP: ffff888058437c60 R08: 000000000000004e R09: ffffed1015d05079
R10: ffffed1015d05078 R11: ffff8880ae8283c7 R12: dead000000000200
R13: dead000000000100 R14: ffff8880537e8fb0 R15: ffff8880537e8fb0
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000738000 CR3: 000000008bcdf000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400