R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007f1dcb626038 R14: 00007f1dcb625fa0 R15: 00007ffeaffa9e18
 </TASK>
------------[ cut here ]------------
folio != NULL
WARNING: fs/netfs/write_issue.c:603 at netfs_writepages+0x883/0xa10 fs/netfs/write_issue.c:603, CPU#1: syz.3.949/9078
Modules linked in:
CPU: 1 UID: 0 PID: 9078 Comm: syz.3.949 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:netfs_writepages+0x883/0xa10 fs/netfs/write_issue.c:603
Code: 48 89 df e8 cf 73 7b ff 48 8b 4c 24 08 48 89 da 4c 89 e6 4c 89 f7 e8 7c 1d 7f ff 48 85 c0 0f 84 c1 fe ff ff e8 0e a9 3d ff 90 <0f> 0b 90 e9 b3 fe ff ff e8 00 a9 3d ff 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffffc9000c2cf890 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffea00010a3740 RCX: ffffffff824be20a
RDX: ffff88802d0aa540 RSI: ffffffff82ccb732 RDI: ffff88802d0aa540
RBP: fffffffffffffff4 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc9000c2cfa60
R13: ffff88805ac34c60 R14: ffff88805ac34e78 R15: dffffc0000000000
FS:  00007f1dcc2196c0(0000) GS:ffff8880d5edc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1e04a51ff8 CR3: 00000000367ef000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000008001800
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_writepages+0x278/0x600 mm/page-writeback.c:2571
 filemap_writeback+0x22d/0x2e0 mm/filemap.c:387
 filemap_fdatawrite_range mm/filemap.c:412 [inline]
 filemap_write_and_wait_range mm/filemap.c:684 [inline]
 filemap_write_and_wait_range+0xa6/0x130 mm/filemap.c:675
 netfs_unbuffered_write_iter+0x269/0x720 fs/netfs/direct_write.c:360
 v9fs_file_write_iter+0xbf/0x100 fs/9p/vfs_file.c:409
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x6ac/0x1050 fs/read_write.c:687
 ksys_write+0x12a/0x250 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1dcb39de99
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1dcc219028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f1dcb625fa0 RCX: 00007f1dcb39de99
RDX: 00000000000019b0 RSI: 00002000000049c0 RDI: 0000000000000003
RBP: 00007f1dcc219090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007f1dcb626038 R14: 00007f1dcb625fa0 R15: 00007ffeaffa9e18
 </TASK>