R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007f9ad1375fa0 R15: 00007ffc73dcc098
 </TASK>
------------[ cut here ]------------
WARNING: CPU: 3 PID: 6717 at lib/iov_iter.c:255 _copy_from_iter+0x39c/0x1560 lib/iov_iter.c:255
Modules linked in:
CPU: 3 UID: 0 PID: 6717 Comm: syz.3.206 Not tainted 6.13.0-rc5-syzkaller-00161-g63676eefb7a0 #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 45 1c fc fc 90 <0f> 0b 90 e9 b2 fd ff ff e8 37 1c fc fc 89 ee bf 01 00 00 00 e8 0b
RSP: 0018:ffffc9000419ef58 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff849df6e8
RDX: ffff888023302440 RSI: ffffffff849df9cb RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000003 R12: ffff888031300420
R13: ffffc9000419f348 R14: ffff888031300420 R15: dffffc0000000000
FS:  00007f9ad1fc56c0(0000) GS:ffff88806a900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3619f75fac CR3: 0000000030d98000 CR4: 0000000000352ef0
DR0: 0000000000000000 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+0xe2/0x180 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:260 [inline]
 netfs_advance_write fs/netfs/write_issue.c:301 [inline]
 netfs_advance_write+0x384/0xc80 fs/netfs/write_issue.c:269
 netfs_write_folio+0xc19/0x1930 fs/netfs/write_issue.c:485
 netfs_writepages+0x29a/0x8f0 fs/netfs/write_issue.c:581
 do_writepages+0x1b3/0x820 mm/page-writeback.c:2702
 filemap_fdatawrite_wbc mm/filemap.c:397 [inline]
 filemap_fdatawrite_wbc+0x104/0x160 mm/filemap.c:387
 __filemap_fdatawrite_range+0xb3/0xf0 mm/filemap.c:430
 v9fs_vfs_setattr+0x93a/0xab0 fs/9p/vfs_inode.c:1072
 notify_change+0x6a6/0x1230 fs/attr.c:552
 do_truncate+0x15c/0x220 fs/open.c:65
 vfs_truncate+0x3ef/0x4e0 fs/open.c:111
 do_sys_truncate fs/open.c:134 [inline]
 __do_sys_truncate fs/open.c:146 [inline]
 __se_sys_truncate fs/open.c:144 [inline]
 __x64_sys_truncate+0x174/0x1e0 fs/open.c:144
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9ad1185d29
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:00007f9ad1fc5038 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007f9ad1375fa0 RCX: 00007f9ad1185d29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040
RBP: 00007f9ad1fc5090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007f9ad1375fa0 R15: 00007ffc73dcc098
 </TASK>