------------[ cut here ]------------ folio expected an open fid inode->i_ino=19a0701 WARNING: CPU: 0 PID: 11 at fs/9p/vfs_addr.c:39 v9fs_begin_writeback fs/9p/vfs_addr.c:39 [inline] WARNING: CPU: 0 PID: 11 at fs/9p/vfs_addr.c:39 v9fs_begin_writeback+0x210/0x280 fs/9p/vfs_addr.c:33 Modules linked in: CPU: 0 UID: 0 PID: 11 Comm: kworker/u32:0 Not tainted 6.13.0-rc5-syzkaller-g0bc21e701a6f #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: writeback wb_workfn (flush-9p-204) RIP: 0010:v9fs_begin_writeback fs/9p/vfs_addr.c:39 [inline] RIP: 0010:v9fs_begin_writeback+0x210/0x280 fs/9p/vfs_addr.c:33 Code: 00 fc ff df 48 8b 5b 48 48 8d 7b 40 48 89 fa 48 c1 ea 03 80 3c 02 00 75 66 48 8b 73 40 48 c7 c7 e0 c5 af 8b e8 91 7e 01 fe 90 <0f> 0b 90 90 e9 62 ff ff ff e8 b2 f1 a3 fe e9 51 ff ff ff e8 18 f1 RSP: 0018:ffffc900000e7448 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff88803dedb380 RCX: ffffffff815a5139 RDX: ffff88801ceda440 RSI: ffffffff815a5146 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000003 R12: ffff88804c9d3148 R13: ffffc900000e7828 R14: dffffc0000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88806a600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32d5ffff CR3: 000000002446e000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> netfs_writepages+0x6b6/0x8f0 fs/netfs/write_issue.c:578 do_writepages+0x1b3/0x820 mm/page-writeback.c:2702 __writeback_single_inode+0x166/0xfa0 fs/fs-writeback.c:1680 writeback_sb_inodes+0x606/0xfa0 fs/fs-writeback.c:1976 wb_writeback+0x422/0xb80 fs/fs-writeback.c:2156 wb_do_writeback fs/fs-writeback.c:2303 [inline] wb_workfn+0x151/0xbc0 fs/fs-writeback.c:2343 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK>