==================================================================
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+0x6f1/0x760 mm/filemap.c:172
Read of size 4 at addr ffff88813143c470 by task syz.4.992/3974

CPU: 1 PID: 3974 Comm: syz.4.992 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:427 [inline]
 kasan_report+0x10f/0x150 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+0x6f1/0x760 mm/filemap.c:172
 __delete_from_page_cache+0xbe/0x470 mm/filemap.c:240
 __remove_mapping+0x601/0x990 mm/vmscan.c:1216
 shrink_page_list+0x2a24/0x5800 mm/vmscan.c:1829
 shrink_inactive_list mm/vmscan.c:2338 [inline]
 shrink_list mm/vmscan.c:2583 [inline]
 shrink_lruvec+0x1297/0x3a40 mm/vmscan.c:5800
 shrink_node_memcgs mm/vmscan.c:5992 [inline]
 shrink_node+0x11ee/0x2a40 mm/vmscan.c:6022
 shrink_zones mm/vmscan.c:6228 [inline]
 do_try_to_free_pages+0x5a7/0x1580 mm/vmscan.c:6286
 try_to_free_mem_cgroup_pages+0x261/0x610 mm/vmscan.c:6600
 try_charge_memcg+0x3eb/0x14e0 mm/memcontrol.c:2717
 try_charge mm/memcontrol.c:2842 [inline]
 charge_memcg+0x6d/0x1a0 mm/memcontrol.c:6865
 __mem_cgroup_charge+0x93/0x280 mm/memcontrol.c:6902
 mem_cgroup_charge include/linux/memcontrol.h:715 [inline]
 shmem_add_to_page_cache+0x64b/0xc50 mm/shmem.c:719
 shmem_getpage_gfp+0x1404/0x2250 mm/shmem.c:1942
 shmem_getpage mm/shmem.c:152 [inline]
 shmem_write_begin+0xce/0x1b0 mm/shmem.c:2476
 generic_perform_write+0x2b7/0x690 mm/filemap.c:3887
 __generic_file_write_iter+0x268/0x490 mm/filemap.c:4015
 generic_file_write_iter+0xa9/0x1d0 mm/filemap.c:4047
 __kernel_write+0x521/0x970 fs/read_write.c:539
 __dump_emit+0x255/0x380 fs/coredump.c:880
 dump_emit+0x36a/0x3d0 fs/coredump.c:917
 dump_user_range+0x86/0x1c0 fs/coredump.c:954
 elf_core_dump+0x2aa4/0x2ff0 fs/binfmt_elf.c:2285
 do_coredump+0x13c2/0x27d0 fs/coredump.c:831
 get_signal+0x387/0x1430 kernel/signal.c:2902
 arch_do_signal_or_restart+0xe2/0x1100 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0xa7/0xe0 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214
 irqentry_exit_to_user_mode+0x9/0x10 kernel/entry/common.c:320
 irqentry_exit+0x12/0x40 kernel/entry/common.c:411
 exc_page_fault+0x5e/0xb0 arch/x86/mm/fault.c:1563
 asm_exc_page_fault+0x27/0x30 arch/x86/include/asm/idtentry.h:606
RIP: 0033:0x7fb186759161
Code: 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 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:fffffffffffffe70 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007fb1869e1270 RCX: 00007fb186759159
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007fb1867f006b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fb1869e1308 R14: 00007fb1869e1270 R15: 00007ffd4be80078
 </TASK>

Allocated by task 308:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:433 [inline]
 __kasan_slab_alloc+0xb7/0xe0 mm/kasan/common.c:466
 kasan_slab_alloc include/linux/kasan.h:217 [inline]
 slab_post_alloc_hook+0x4f/0x2b0 mm/slab.h:550
 slab_alloc_node mm/slub.c:3245 [inline]
 slab_alloc mm/slub.c:3255 [inline]
 kmem_cache_alloc+0xf7/0x260 mm/slub.c:3260
 getname_flags+0xba/0x510 fs/namei.c:138
 getname fs/namei.c:217 [inline]
 __do_sys_rename fs/namei.c:5039 [inline]
 __se_sys_rename fs/namei.c:5037 [inline]
 __x64_sys_rename+0x5f/0x90 fs/namei.c:5037
 x64_sys_call+0x680/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:83
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

Freed by task 308:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:365
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373
 kasan_slab_free include/linux/kasan.h:193 [inline]
 slab_free_hook mm/slub.c:1728 [inline]
 slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1754
 slab_free mm/slub.c:3526 [inline]
 kmem_cache_free+0x100/0x320 mm/slub.c:3544
 putname fs/namei.c:271 [inline]
 do_renameat2+0xea9/0xfc0 fs/namei.c:5018
 __do_sys_rename fs/namei.c:5039 [inline]
 __se_sys_rename fs/namei.c:5037 [inline]
 __x64_sys_rename+0x86/0x90 fs/namei.c:5037
 x64_sys_call+0x680/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:83
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

The buggy address belongs to the object at ffff88813143c400
 which belongs to the cache names_cache of size 4096
The buggy address is located 112 bytes inside of
 4096-byte region [ffff88813143c400, ffff88813143d400)
The buggy address belongs to the page:
page:ffffea0004c50e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x131438
head:ffffea0004c50e00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 dead000000000122 ffff8881001c4180
raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
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 308, ts 222337847830, free_ts 222333806957
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2607
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2613
 get_page_from_freelist+0x2c3a/0x2cd0 mm/page_alloc.c:4487
 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5824
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1937 [inline]
 new_slab+0xa0/0x4d0 mm/slub.c:2000
 ___slab_alloc+0x3ac/0x840 mm/slub.c:3033
 __slab_alloc+0x49/0x90 mm/slub.c:3120
 slab_alloc_node mm/slub.c:3211 [inline]
 slab_alloc mm/slub.c:3255 [inline]
 kmem_cache_alloc+0x138/0x260 mm/slub.c:3260
 getname_flags+0xba/0x510 fs/namei.c:138
 getname fs/namei.c:217 [inline]
 __do_sys_rename fs/namei.c:5039 [inline]
 __se_sys_rename fs/namei.c:5037 [inline]
 __x64_sys_rename+0x5f/0x90 fs/namei.c:5037
 x64_sys_call+0x680/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:83
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1474 [inline]
 free_pcp_prepare mm/page_alloc.c:1546 [inline]
 free_unref_page_prepare+0x5fa/0x600 mm/page_alloc.c:3536
 free_unref_page+0xae/0x540 mm/page_alloc.c:3618
 free_the_page mm/page_alloc.c:805 [inline]
 __free_pages+0x6c/0x100 mm/page_alloc.c:5900
 __free_slab+0xe5/0x1e0 mm/slub.c:2025
 free_slab mm/slub.c:2040 [inline]
 discard_slab mm/slub.c:2046 [inline]
 __unfreeze_partials+0x15a/0x190 mm/slub.c:2532
 put_cpu_partial+0xc6/0x120 mm/slub.c:2612
 __slab_free+0x1d4/0x290 mm/slub.c:3395
 do_slab_free mm/slub.c:3514 [inline]
 ___cache_free+0x104/0x120 mm/slub.c:3535
 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157
 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x14a/0x170 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+0x4f/0x2b0 mm/slab.h:550
 slab_alloc_node mm/slub.c:3245 [inline]
 slab_alloc mm/slub.c:3255 [inline]
 kmem_cache_alloc+0xf7/0x260 mm/slub.c:3260
 getname_flags+0xba/0x510 fs/namei.c:138
 user_path_at_empty+0x2f/0x1c0 fs/namei.c:2890

Memory state around the buggy address:
 ffff88813143c300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88813143c380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88813143c400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                             ^
 ffff88813143c480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88813143c500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
syz.4.992 (3974) used greatest stack depth: 15976 bytes left