------------[ cut here ]------------
WARNING: CPU: 1 PID: 10469 at lib/iov_iter.c:255 _copy_from_iter+0x35b/0x1e70 lib/iov_iter.c:255
Modules linked in:
CPU: 1 UID: 0 PID: 10469 Comm: syz.0.1271 Not tainted 6.12.0-rc6-syzkaller-00099-g7758b206117d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:_copy_from_iter+0x35b/0x1e70 lib/iov_iter.c:255
Code: 84 24 20 01 00 00 0f 85 8e 1a 00 00 48 8b 44 24 18 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 f6 67 e2 fc 90 <0f> 0b 90 eb 17 e8 eb 67 e2 fc 4c 89 e8 4c 89 6c 24 18 e9 f8 fd ff
RSP: 0018:ffffc900128e6b20 EFLAGS: 00010293
RAX: ffffffff84b2720a RBX: 0000000000000000 RCX: ffff88805fbdbc00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900128e6c90 R08: ffffffff84b26f6f R09: 1ffffd4000180f80
R10: dffffc0000000000 R11: fffff94000180f81 R12: ffff8880301f0017
R13: 0000000000007fec R14: ffff8880765fa1a2 R15: 1ffff9200251cd78
FS:  00007ff70d3c46c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3041dff8 CR3: 000000005b7f6000 CR4: 00000000003526f0
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+0x1c75/0x29e0 net/9p/protocol.c:614
 p9_client_prepare_req+0xa8d/0xf50 net/9p/client.c:651
 p9_client_rpc+0x19d/0xac0 net/9p/client.c:691
 p9_client_write+0x328/0x7a0 net/9p/client.c:1645
 v9fs_issue_write+0xfd/0x1c0 fs/9p/vfs_addr.c:59
 netfs_do_issue_write fs/netfs/write_issue.c:233 [inline]
 netfs_issue_write fs/netfs/write_issue.c:260 [inline]
 netfs_advance_write+0x972/0xbd0 fs/netfs/write_issue.c:301
 netfs_write_folio+0x12fb/0x2070 fs/netfs/write_issue.c:485
 netfs_writepages+0x8aa/0xb80 fs/netfs/write_issue.c:581
 do_writepages+0x35d/0x870 mm/page-writeback.c:2683
 filemap_fdatawrite_wbc+0x125/0x180 mm/filemap.c:398
 __filemap_fdatawrite_range mm/filemap.c:431 [inline]
 __filemap_fdatawrite mm/filemap.c:437 [inline]
 filemap_fdatawrite+0xf5/0x150 mm/filemap.c:442
 v9fs_vfs_setattr+0x7e5/0xe20 fs/9p/vfs_inode.c:1072
 notify_change+0xbca/0xe90 fs/attr.c:503
 vfs_utimes+0x4b5/0x770 fs/utimes.c:66
 do_utimes_path fs/utimes.c:99 [inline]
 do_utimes fs/utimes.c:145 [inline]
 __do_sys_utime fs/utimes.c:226 [inline]
 __se_sys_utime+0x1de/0x2e0 fs/utimes.c:215
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff70c57e719
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:00007ff70d3c4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000084
RAX: ffffffffffffffda RBX: 00007ff70c736058 RCX: 00007ff70c57e719
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020003000
RBP: 00007ff70d3c4090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007ff70c736058 R15: 00007ffc2b010de8
 </TASK>