R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007fb171775fa0 R15: 00007ffcf948f308
 </TASK>
------------[ cut here ]------------
WARNING: CPU: 3 PID: 9316 at lib/iov_iter.c:255 _copy_from_iter+0x39c/0x1560 lib/iov_iter.c:255
Modules linked in:
CPU: 3 UID: 0 PID: 9316 Comm: syz.6.963 Not tainted 6.13.0-rc7-syzkaller-00191-gfda5e3f28400 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:_copy_from_iter+0x39c/0x1560 lib/iov_iter.c:255
Code: 5e fd 0f 01 cb 48 89 d9 4c 89 f7 48 89 ee f3 a4 0f 1f 00 48 89 cd 0f 01 ca 49 89 df 49 29 cf e9 22 ff ff ff e8 f5 f1 fb fc 90 <0f> 0b 90 e9 b2 fd ff ff e8 e7 f1 fb fc 89 ee bf 01 00 00 00 e8 7b
RSP: 0018:ffffc900031cf0e0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff849e2fc8
RDX: ffff88802810a440 RSI: ffffffff849e32ab RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888031683aa0
R13: ffffc900031cf4d0 R14: ffff888031683aa0 R15: dffffc0000000000
FS:  00007fb1723246c0(0000) GS:ffff88806a900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200015c0 CR3: 000000003eda0000 CR4: 0000000000352ef0
DR0: 0000000000002800 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 copy_from_iter include/linux/uio.h:219 [inline]
 copy_from_iter_full include/linux/uio.h:236 [inline]
 pdu_write_u net/9p/protocol.c:234 [inline]
 p9pdu_vwritef+0x2d0/0x1cf0 net/9p/protocol.c:614
 p9_client_prepare_req+0x244/0x4d0 net/9p/client.c:651
 p9_client_rpc+0x1c3/0xc10 net/9p/client.c:691
 p9_client_write+0x31f/0x680 net/9p/client.c:1645
 v9fs_issue_write+0xe4/0x1b0 fs/9p/vfs_addr.c:59
 netfs_do_issue_write+0x92/0x110 fs/netfs/write_issue.c:233
 netfs_issue_write fs/netfs/write_issue.c:262 [inline]
 netfs_advance_write fs/netfs/write_issue.c:303 [inline]
 netfs_advance_write+0x384/0xc80 fs/netfs/write_issue.c:271
 netfs_write_folio+0xc19/0x1930 fs/netfs/write_issue.c:487
 netfs_writepages+0x29a/0x8f0 fs/netfs/write_issue.c:583
 do_writepages+0x1b3/0x820 mm/page-writeback.c:2708
 filemap_fdatawrite_wbc mm/filemap.c:388 [inline]
 filemap_fdatawrite_wbc+0x104/0x160 mm/filemap.c:378
 __filemap_fdatawrite_range+0xb3/0xf0 mm/filemap.c:421
 v9fs_dir_release+0x429/0x590 fs/9p/vfs_dir.c:219
 __fput+0x3f8/0xb60 fs/file_table.c:450
 task_work_run+0x14e/0x250 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb171585d29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb172324038 EFLAGS: 00000246 ORIG_RAX: 0000000000000124
RAX: 0000000000000005 RBX: 00007fb171775fa0 RCX: 00007fb171585d29
RDX: 0000000000080000 RSI: 0000000000000005 RDI: 0000000000000004
RBP: 00007fb172324090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007fb171775fa0 R15: 00007ffcf948f308
 </TASK>