R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
------------[ cut here ]------------
folio != NULL
WARNING: fs/netfs/write_issue.c:603 at netfs_writepages+0x883/0xa10 fs/netfs/write_issue.c:603, CPU#0: syz.7.5087/28259
Modules linked in:
CPU: 0 UID: 0 PID: 28259 Comm: syz.7.5087 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 1f dd 7b ff 48 8b 4c 24 08 48 89 da 4c 89 e6 4c 89 f7 e8 cc 86 7f ff 48 85 c0 0f 84 c1 fe ff ff e8 4e 11 3f ff 90 <0f> 0b 90 e9 b3 fe ff ff e8 40 11 3f ff 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffffc900039571a0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffea0001e27600 RCX: ffffffff8249af3a
RDX: ffff888000f62540 RSI: ffffffff82ca1b12 RDI: ffff888000f62540
RBP: fffffffffffffff4 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90003957370
R13: ffff8880137f2340 R14: ffff8880137f2558 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888096bf5000(0063) knlGS:00000000f540db40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f701f000 CR3: 000000005c16a000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 do_writepages+0x278/0x600 mm/page-writeback.c:2571
 filemap_writeback+0x22d/0x2e0 mm/filemap.c:387
 v9fs_mmap_vm_close fs/9p/vfs_file.c:496 [inline]
 v9fs_mmap_vm_close+0x137/0x1e0 fs/9p/vfs_file.c:489
 vma_close mm/internal.h:190 [inline]
 vms_clean_up_area mm/vma.c:1318 [inline]
 __mmap_setup mm/vma.c:2476 [inline]
 __mmap_region+0x890/0x2db0 mm/vma.c:2756
 mmap_region+0x527/0x620 mm/vma.c:2860
 do_mmap+0xc63/0x12f0 mm/mmap.c:560
 vm_mmap_pgoff+0x29e/0x470 mm/util.c:581
 ksys_mmap_pgoff+0x3cb/0x610 mm/mmap.c:606
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0xe7/0x970 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:332
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf701efec
Code: Unable to access opcode bytes at 0xf701efc2.
RSP: 002b:00000000f540d50c EFLAGS: 00000292 ORIG_RAX: 00000000000000c0
RAX: ffffffffffffffda RBX: 0000000080000000 RCX: 0000000000b36000
RDX: 0000000000000002 RSI: 0000000000028011 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>