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BUG: KASAN: use-after-free in cleancache_fs_enabled_mapping include/linux/cleancache.h:56 [inline]
BUG: KASAN: use-after-free in cleancache_invalidate_page include/linux/cleancache.h:110 [inline]
BUG: KASAN: use-after-free in unaccount_page_cache_page+0x6d8/0x750 mm/filemap.c:163
Read of size 4 at addr ffff888128a09470 by task syz-executor.3/14338

CPU: 1 PID: 14338 Comm: syz-executor.3 Not tainted 5.15.106-syzkaller-00249-g19c0ed55a470 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
 print_address_description+0x87/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:427 [inline]
 kasan_report+0x179/0x1c0 mm/kasan/report.c:444
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308
 cleancache_fs_enabled_mapping include/linux/cleancache.h:56 [inline]
 cleancache_invalidate_page include/linux/cleancache.h:110 [inline]
 unaccount_page_cache_page+0x6d8/0x750 mm/filemap.c:163
 __delete_from_page_cache+0xc6/0x5b0 mm/filemap.c:231
 __remove_mapping+0x566/0x690 mm/vmscan.c:1197
 shrink_page_list+0x25f1/0x5820 mm/vmscan.c:1789
 shrink_inactive_list mm/vmscan.c:2261 [inline]
 shrink_list mm/vmscan.c:2506 [inline]
 shrink_lruvec+0x17e9/0x4340 mm/vmscan.c:5694
 shrink_node_memcgs mm/vmscan.c:5886 [inline]
 shrink_node+0x1077/0x24e0 mm/vmscan.c:5916
 shrink_zones mm/vmscan.c:6119 [inline]
 do_try_to_free_pages+0x5b6/0x1570 mm/vmscan.c:6177
 try_to_free_mem_cgroup_pages+0x36c/0x850 mm/vmscan.c:6491
 memory_high_write+0x243/0x3b0 mm/memcontrol.c:6382
 cgroup_file_write+0x290/0x590 kernel/cgroup/cgroup.c:3943
 kernfs_fop_write_iter+0x2c4/0x410 fs/kernfs/file.c:296
 call_write_iter include/linux/fs.h:2159 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0xd8a/0x1160 fs/read_write.c:594
 ksys_write+0x199/0x2c0 fs/read_write.c:647
 __do_sys_write fs/read_write.c:659 [inline]
 __se_sys_write fs/read_write.c:656 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:656
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f3e70eca169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3e6fbfb168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f3e70fea120 RCX: 00007f3e70eca169
RDX: 0000000000000012 RSI: 0000000020000300 RDI: 0000000000000007
RBP: 00007f3e70f25ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe5cc8510f R14: 00007f3e6fbfb300 R15: 0000000000022000
 </TASK>

The buggy address belongs to the page:
page:ffffea0004a28240 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x128a09
flags: 0x4000000000000000(zone=1)
raw: 4000000000000000 0000000000000000 ffffffff04a20301 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 543, ts 904779804208, free_ts 905862350937
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2502
 prep_new_page mm/page_alloc.c:2508 [inline]
 get_page_from_freelist+0x2c14/0x2cf0 mm/page_alloc.c:4291
 __alloc_pages+0x386/0x7b0 mm/page_alloc.c:5569
 allocate_slab mm/slub.c:1930 [inline]
 new_slab+0x92/0x490 mm/slub.c:1993
 ___slab_alloc+0x39e/0x830 mm/slub.c:3026
 __slab_alloc+0x4a/0x90 mm/slub.c:3113
 slab_alloc_node mm/slub.c:3204 [inline]
 slab_alloc mm/slub.c:3246 [inline]
 kmem_cache_alloc+0x134/0x200 mm/slub.c:3251
 getname_flags+0xba/0x520 fs/namei.c:138
 user_path_at_empty+0x2d/0x1a0 fs/namei.c:2852
 user_path_at include/linux/namei.h:57 [inline]
 vfs_statx+0xfd/0x720 fs/stat.c:221
 vfs_fstatat fs/stat.c:243 [inline]
 vfs_lstat include/linux/fs.h:3381 [inline]
 __do_sys_newlstat fs/stat.c:397 [inline]
 __se_sys_newlstat+0xba/0x780 fs/stat.c:391
 __x64_sys_newlstat+0x5b/0x70 fs/stat.c:391
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1370 [inline]
 free_pcp_prepare mm/page_alloc.c:1442 [inline]
 free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3441
 free_unref_page+0xac/0x2c0 mm/page_alloc.c:3521
 free_the_page mm/page_alloc.c:711 [inline]
 __free_pages+0x61/0xf0 mm/page_alloc.c:5645
 __free_slab+0xec/0x1d0 mm/slub.c:2018
 free_slab mm/slub.c:2033 [inline]
 discard_slab mm/slub.c:2039 [inline]
 __unfreeze_partials+0x165/0x1a0 mm/slub.c:2525
 put_cpu_partial+0xc4/0x120 mm/slub.c:2605
 __slab_free+0x1c8/0x290 mm/slub.c:3386
 do_slab_free mm/slub.c:3505 [inline]
 ___cache_free+0x109/0x120 mm/slub.c:3524
 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157
 qlist_free_all+0x44/0xb0 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:443
 kasan_slab_alloc include/linux/kasan.h:217 [inline]
 slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550
 slab_alloc_node mm/slub.c:3238 [inline]
 slab_alloc mm/slub.c:3246 [inline]
 kmem_cache_alloc+0xf5/0x200 mm/slub.c:3251
 p9_tag_alloc net/9p/client.c:268 [inline]
 p9_client_prepare_req+0xba/0xb20 net/9p/client.c:701
 p9_client_rpc+0x159/0x1390 net/9p/client.c:738

Memory state around the buggy address:
 ffff888128a09300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888128a09380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888128a09400: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                                             ^
 ffff888128a09480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888128a09500: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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