page: refcount:1 mapcount:0 mapping:ffff888043738220 index:0x0 pfn:0x4cdef
memcg:ffff888030ad0d00
aops:v9fs_addr_operations ino:2 dentry name(?):"/"
flags: 0x4fff20000000020(lru|node=1|zone=1|lastcpupid=0x7ff)
raw: 04fff20000000020 ffff888030ad89e0 ffff888030ad89e0 ffff888043738220
raw: 0000000000000000 0000000000000000 00000001ffffffff ffff888030ad0d00
page dumped because: VM_BUG_ON_FOLIO(!folio_test_locked(folio))
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Movable, gfp_mask 0x141cca(GFP_HIGHUSER_MOVABLE|__GFP_WRITE|__GFP_COMP), pid 5368, tgid 5367 (syz.0.0), ts 85311006764, free_ts 85274848096
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1851
 prep_new_page mm/page_alloc.c:1859 [inline]
 get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3858
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5148
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416
 alloc_frozen_pages_noprof mm/mempolicy.c:2487 [inline]
 alloc_pages_noprof+0xa9/0x190 mm/mempolicy.c:2507
 folio_alloc_noprof+0x1e/0x30 mm/mempolicy.c:2517
 filemap_alloc_folio_noprof+0xdf/0x470 mm/filemap.c:1007
 __filemap_get_folio+0x3f2/0xaf0 mm/filemap.c:1981
 netfs_grab_folio_for_write fs/netfs/buffered_write.c:47 [inline]
 netfs_perform_write+0x43d/0x1ae0 fs/netfs/buffered_write.c:179
 netfs_file_write_iter+0x17d/0x4a0 fs/netfs/buffered_write.c:491
 do_iter_readv_writev+0x61c/0x8b0 fs/read_write.c:-1
 vfs_writev+0x31a/0x960 fs/read_write.c:1057
 do_pwritev fs/read_write.c:1153 [inline]
 __do_sys_pwritev2 fs/read_write.c:1211 [inline]
 __se_sys_pwritev2+0x179/0x290 fs/read_write.c:1202
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5367 tgid 5367 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1395 [inline]
 free_unref_folios+0xdbd/0x1520 mm/page_alloc.c:2952
 folios_put_refs+0x559/0x640 mm/swap.c:997
 folios_put include/linux/mm.h:1419 [inline]
 folio_batch_move_lru+0x319/0x3a0 mm/swap.c:175
 __folio_batch_add_and_move+0x5ad/0xd20 mm/swap.c:196
 wp_page_copy mm/memory.c:3620 [inline]
 do_wp_page+0x1c09/0x5800 mm/memory.c:4013
 handle_pte_fault mm/memory.c:6068 [inline]
 __handle_mm_fault+0x1033/0x5440 mm/memory.c:6195
 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6364
 do_user_addr_fault+0xa81/0x1390 arch/x86/mm/fault.c:1336
 handle_page_fault arch/x86/mm/fault.c:1476 [inline]
 exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
------------[ cut here ]------------
kernel BUG at mm/filemap.c:1498!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5368 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:folio_unlock+0x13d/0x160 mm/filemap.c:1498
Code: aa c7 ff 48 89 df 48 c7 c6 80 4d 94 8b e8 2b e9 2f ff 90 0f 0b e8 a3 aa c7 ff 48 89 df 48 c7 c6 a0 43 94 8b e8 14 e9 2f ff 90 <0f> 0b e8 8c aa c7 ff 48 89 df 48 c7 c6 80 4d 94 8b e8 fd e8 2f ff
RSP: 0018:ffffc9000d2c7888 EFLAGS: 00010246
RAX: 091506fe83e5d100 RBX: ffffea0001337bc0 RCX: 0000000000000000
RDX: 0000000000000007 RSI: ffffffff8d9bbb7f RDI: 00000000ffffffff
RBP: ffffc9000d2c7c48 R08: ffffffff8fa3b637 R09: 1ffffffff1f476c6
R10: dffffc0000000000 R11: fffffbfff1f476c7 R12: 1ffffd4000266f79
R13: 04fff20000000020 R14: ffffea0001337bc8 R15: dffffc0000000000
FS:  00007f4a691bb6c0(0000) GS:ffff88808d20d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4a5c9ff000 CR3: 00000000438a7000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 netfs_perform_write+0x14fc/0x1ae0 fs/netfs/buffered_write.c:407
 netfs_file_write_iter+0x17d/0x4a0 fs/netfs/buffered_write.c:491
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x5c6/0xb30 fs/read_write.c:686
 ksys_write+0x145/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4a6838ebe9
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:00007f4a691bb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f4a685c5fa0 RCX: 00007f4a6838ebe9
RDX: 0000000000000018 RSI: 0000200000000380 RDI: 0000000000000007
RBP: 00007f4a68411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4a685c6038 R14: 00007f4a685c5fa0 R15: 00007ffe022d9ce8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:folio_unlock+0x13d/0x160 mm/filemap.c:1498
Code: aa c7 ff 48 89 df 48 c7 c6 80 4d 94 8b e8 2b e9 2f ff 90 0f 0b e8 a3 aa c7 ff 48 89 df 48 c7 c6 a0 43 94 8b e8 14 e9 2f ff 90 <0f> 0b e8 8c aa c7 ff 48 89 df 48 c7 c6 80 4d 94 8b e8 fd e8 2f ff
RSP: 0018:ffffc9000d2c7888 EFLAGS: 00010246
RAX: 091506fe83e5d100 RBX: ffffea0001337bc0 RCX: 0000000000000000
RDX: 0000000000000007 RSI: ffffffff8d9bbb7f RDI: 00000000ffffffff
RBP: ffffc9000d2c7c48 R08: ffffffff8fa3b637 R09: 1ffffffff1f476c6
R10: dffffc0000000000 R11: fffffbfff1f476c7 R12: 1ffffd4000266f79
R13: 04fff20000000020 R14: ffffea0001337bc8 R15: dffffc0000000000
FS:  00007f4a691bb6c0(0000) GS:ffff88808d20d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff0e31909c0 CR3: 00000000438a7000 CR4: 0000000000352ef0