------------[ cut here ]------------ folio != NULL WARNING: fs/netfs/write_issue.c:603 at netfs_writepages+0x883/0xa10 fs/netfs/write_issue.c:603, CPU#2: syz.3.3658/20071 Modules linked in: CPU: 2 UID: 0 PID: 20071 Comm: syz.3.3658 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 2f 87 7b ff 48 8b 4c 24 08 48 89 da 4c 89 e6 4c 89 f7 e8 dc 30 7f ff 48 85 c0 0f 84 c1 fe ff ff e8 ee c2 3d ff 90 <0f> 0b 90 e9 b3 fe ff ff e8 e0 c2 3d ff 48 b8 00 00 00 00 00 fc ff RSP: 0018:ffffc90025c8f178 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffffea0001019880 RCX: ffffffff824b57ea RDX: ffff8880343d2540 RSI: ffffffff82cc19b2 RDI: ffff8880343d2540 RBP: fffffffffffffff4 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90025c8f348 R13: ffff888043c80bc0 R14: ffff888043c80dd8 R15: dffffc0000000000 FS: 00007f4f24ff66c0(0000) GS:ffff8880d5fe8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4f26d874c0 CR3: 00000000486fd000 CR4: 0000000000352ef0 Call Trace: 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+0x35d/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_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline] __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82 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: 0033:0x7f4f26d9de99 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:00007f4f24ff6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f4f27025fa0 RCX: 00007f4f26d9de99 RDX: 0000000000000004 RSI: 0000000000004000 RDI: 0000200000001000 RBP: 00007f4f24ff6090 R08: 0000000000000004 R09: 0000000100000000 R10: 0000000000000012 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f4f27026038 R14: 00007f4f27025fa0 R15: 00007fffad270fc8