------------[ cut here ]------------ WARNING: CPU: 0 PID: 24182 at lib/iov_iter.c:255 _copy_from_iter+0x35b/0x1e70 lib/iov_iter.c:255 Modules linked in: CPU: 0 UID: 0 PID: 24182 Comm: syz.8.5395 Not tainted 6.12.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 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 86 43 e2 fc 90 <0f> 0b 90 eb 17 e8 7b 43 e2 fc 4c 89 e8 4c 89 6c 24 18 e9 f8 fd ff RSP: 0018:ffffc9000bd3ebe0 EFLAGS: 00010293 RAX: ffffffff84b2962a RBX: 0000000000000000 RCX: ffff88806593bc00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000bd3ed50 R08: ffffffff84b2938f R09: 1ffffffff2037bad R10: dffffc0000000000 R11: fffffbfff2037bae R12: ffff888011d932d7 R13: 0000000000000004 R14: ffff8880375dc1a2 R15: 1ffff920017a7d90 FS: 00007f4af09636c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fea5e317887 CR3: 0000000051620000 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] file_write_and_wait_range+0x195/0x280 mm/filemap.c:788 v9fs_file_fsync+0xf3/0x1d0 fs/9p/vfs_file.c:418 generic_write_sync include/linux/fs.h:2871 [inline] netfs_file_write_iter+0x36d/0x3f0 fs/netfs/buffered_write.c:487 new_sync_write fs/read_write.c:590 [inline] vfs_write+0xaeb/0xd30 fs/read_write.c:683 ksys_write+0x183/0x2b0 fs/read_write.c:736 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: 0033:0x7f4aefb7e719 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:00007f4af0963038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f4aefd35f80 RCX: 00007f4aefb7e719 RDX: 0000000000000004 RSI: 0000000020000300 RDI: 0000000000000007 RBP: 00007f4af0963090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 00007f4aefd35f80 R15: 00007ffc67f16368 </TASK>