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kernel BUG at fs/netfs/iterator.c:248!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 2 UID: 0 PID: 1697 Comm: kworker/2:2 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: events p9_write_work
RIP: 0010:netfs_limit_iter+0x100d/0x1100 fs/netfs/iterator.c:248
Code: ff e9 a4 f4 ff ff 48 89 de 48 c7 c7 a0 c9 ab 8e e8 b8 f1 73 fe e9 59 f6 ff ff e8 1e e5 b1 ff e9 6f f6 ff ff e8 54 56 45 ff 90 <0f> 0b e8 7c e4 b1 ff e9 cd f9 ff ff 4c 89 f6 48 c7 c7 20 ca ab 8e
RSP: 0018:ffffc90007c8f770 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff82c3923b
RDX: ffff88802cff0000 RSI: ffffffff82c3a16c RDI: ffff88802cff0000
RBP: 0000000000000003 R08: 0000000000000001 R09: 0000000000000005
R10: 0000000000000003 R11: 000000000000761b R12: 000000007fffffff
R13: 1ffff92000f91ef4 R14: ffff88801bf71960 R15: ffff8880228aa580
FS:  0000000000000000(0000) GS:ffff8880d653e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 000000002640e000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 netfs_unbuffered_write+0x25d/0x2080 fs/netfs/direct_write.c:128
 netfs_unbuffered_write_iter_locked+0x801/0xab0 fs/netfs/direct_write.c:287
 netfs_unbuffered_write_iter+0x40c/0x710 fs/netfs/direct_write.c:377
 v9fs_file_write_iter+0xbf/0x100 fs/9p/vfs_file.c:409
 __kernel_write_iter+0x2ac/0x920 fs/read_write.c:621
 __kernel_write fs/read_write.c:641 [inline]
 kernel_write fs/read_write.c:662 [inline]
 kernel_write+0x1f4/0x6c0 fs/read_write.c:652
 p9_fd_write net/9p/trans_fd.c:398 [inline]
 p9_write_work+0x24a/0xbe0 net/9p/trans_fd.c:449
 process_one_work+0xa23/0x19a0 kernel/workqueue.c:3276
 process_scheduled_works kernel/workqueue.c:3359 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3440
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:netfs_limit_iter+0x100d/0x1100 fs/netfs/iterator.c:248
Code: ff e9 a4 f4 ff ff 48 89 de 48 c7 c7 a0 c9 ab 8e e8 b8 f1 73 fe e9 59 f6 ff ff e8 1e e5 b1 ff e9 6f f6 ff ff e8 54 56 45 ff 90 <0f> 0b e8 7c e4 b1 ff e9 cd f9 ff ff 4c 89 f6 48 c7 c7 20 ca ab 8e
RSP: 0018:ffffc90007c8f770 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff82c3923b
RDX: ffff88802cff0000 RSI: ffffffff82c3a16c RDI: ffff88802cff0000
RBP: 0000000000000003 R08: 0000000000000001 R09: 0000000000000005
R10: 0000000000000003 R11: 000000000000761b R12: 000000007fffffff
R13: 1ffff92000f91ef4 R14: ffff88801bf71960 R15: ffff8880228aa580
FS:  0000000000000000(0000) GS:ffff8880d653e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 000000002640e000 CR4: 0000000000352ef0