loop4: detected capacity change from 0 to 131072
F2FS-fs (loop4): Test dummy encryption mode enabled
F2FS-fs (loop4): invalid crc value
F2FS-fs (loop4): Found nat_bits in checkpoint
==================================================================
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+0x6f2/0x760 mm/filemap.c:167
Read of size 4 at addr ffff88811b702470 by task syz.4.3296/11673

CPU: 1 PID: 11673 Comm: syz.4.3296 Tainted: G        W         5.15.185-syzkaller-00339-ge678c93d43cc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:88
 dump_stack_lvl+0xee/0x150 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+0xf1/0x140 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+0x6f2/0x760 mm/filemap.c:167
 __delete_from_page_cache+0xbe/0x420 mm/filemap.c:235
 __remove_mapping+0x55d/0x680 mm/vmscan.c:1208
 shrink_page_list+0x25c8/0x4cc0 mm/vmscan.c:1805
 shrink_inactive_list mm/vmscan.c:2312 [inline]
 shrink_list mm/vmscan.c:2557 [inline]
 shrink_lruvec+0x10e4/0x3760 mm/vmscan.c:5762
 shrink_node_memcgs mm/vmscan.c:5954 [inline]
 shrink_node+0x11e9/0x2a70 mm/vmscan.c:5984
 shrink_zones mm/vmscan.c:6190 [inline]
 do_try_to_free_pages+0x57e/0x1550 mm/vmscan.c:6248
 try_to_free_mem_cgroup_pages+0x233/0x5b0 mm/vmscan.c:6562
 try_charge_memcg+0x3da/0x1450 mm/memcontrol.c:2702
 try_charge mm/memcontrol.c:2827 [inline]
 charge_memcg+0x6d/0x1a0 mm/memcontrol.c:6853
 __mem_cgroup_charge+0x37/0x130 mm/memcontrol.c:6889
 mem_cgroup_charge include/linux/memcontrol.h:715 [inline]
 __add_to_page_cache_locked+0x1dc/0x7a0 mm/filemap.c:896
 add_to_page_cache_lru+0xa7/0x210 mm/filemap.c:988
 pagecache_get_page+0x981/0xc20 mm/filemap.c:1957
 find_or_create_page include/linux/pagemap.h:418 [inline]
 grab_cache_page include/linux/pagemap.h:500 [inline]
 f2fs_grab_cache_page fs/f2fs/f2fs.h:2736 [inline]
 f2fs_ra_meta_pages+0x3ea/0x9d0 fs/f2fs/checkpoint.c:277
 __f2fs_build_free_nids fs/f2fs/node.c:2487 [inline]
 f2fs_build_free_nids+0x6d5/0x1170 fs/f2fs/node.c:2538
 f2fs_build_node_manager+0x1676/0x1de0 fs/f2fs/node.c:3325
 f2fs_fill_super+0x4322/0x6d10 fs/f2fs/super.c:4359
 mount_bdev+0x2ae/0x3e0 fs/super.c:1400
 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4635
 legacy_get_tree+0xed/0x190 fs/fs_context.c:611
 vfs_get_tree+0x89/0x260 fs/super.c:1530
 do_new_mount+0x25a/0xa20 fs/namespace.c:3010
 path_mount+0x675/0x1020 fs/namespace.c:3340
 do_mount fs/namespace.c:3353 [inline]
 __do_sys_mount fs/namespace.c:3561 [inline]
 __se_sys_mount+0x318/0x380 fs/namespace.c:3538
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3538
 x64_sys_call+0x6bf/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166
 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
RIP: 0033:0x7faf34bb30ca
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007faf33219e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007faf33219ef0 RCX: 00007faf34bb30ca
RDX: 0000200000000100 RSI: 0000200000010600 RDI: 00007faf33219eb0
RBP: 0000200000000100 R08: 00007faf33219ef0 R09: 0000000000000010
R10: 0000000000000010 R11: 0000000000000246 R12: 0000200000010600
R13: 00007faf33219eb0 R14: 000000000001059a R15: 0000200000000180
 </TASK>

The buggy address belongs to the page:
page:ffffea00046dc080 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11b702
flags: 0x4000000000000000(zone=1)
raw: 4000000000000000 0000000000000000 ffffea0000000000 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 11396, ts 714734284063, free_ts 721940979146
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2605
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2611
 get_page_from_freelist+0x2cc5/0x2d50 mm/page_alloc.c:4485
 __alloc_pages+0x18f/0x440 mm/page_alloc.c:5789
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1932 [inline]
 new_slab+0xa1/0x4d0 mm/slub.c:1995
 ___slab_alloc+0x381/0x810 mm/slub.c:3028
 __slab_alloc+0x49/0x90 mm/slub.c:3115
 slab_alloc_node mm/slub.c:3206 [inline]
 slab_alloc mm/slub.c:3250 [inline]
 __kmalloc+0x16a/0x2c0 mm/slub.c:4427
 kmalloc include/linux/slab.h:621 [inline]
 kernfs_file_read_iter fs/kernfs/file.c:195 [inline]
 kernfs_fop_read_iter+0x15d/0x470 fs/kernfs/file.c:242
 call_read_iter include/linux/fs.h:2198 [inline]
 new_sync_read fs/read_write.c:404 [inline]
 vfs_read+0x68b/0xbe0 fs/read_write.c:485
 ksys_read+0x140/0x240 fs/read_write.c:623
 __do_sys_read fs/read_write.c:633 [inline]
 __se_sys_read fs/read_write.c:631 [inline]
 __x64_sys_read+0x7b/0x90 fs/read_write.c:631
 x64_sys_call+0x96d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:1
 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:1472 [inline]
 free_pcp_prepare mm/page_alloc.c:1544 [inline]
 free_unref_page_prepare+0x542/0x550 mm/page_alloc.c:3534
 free_unref_page+0xa2/0x550 mm/page_alloc.c:3616
 free_the_page mm/page_alloc.c:805 [inline]
 __free_pages+0x6c/0x100 mm/page_alloc.c:5865
 __free_slab+0xe8/0x1e0 mm/slub.c:2020
 free_slab mm/slub.c:2035 [inline]
 discard_slab mm/slub.c:2041 [inline]
 __unfreeze_partials+0x160/0x190 mm/slub.c:2527
 put_cpu_partial+0xc6/0x120 mm/slub.c:2607
 __slab_free+0x1d4/0x290 mm/slub.c:3390
 do_slab_free mm/slub.c:3509 [inline]
 ___cache_free+0x104/0x120 mm/slub.c:3530
 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/0xf0 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:3240 [inline]
 slab_alloc mm/slub.c:3250 [inline]
 __kmalloc+0x120/0x2c0 mm/slub.c:4427
 kmalloc include/linux/slab.h:621 [inline]
 kernfs_file_read_iter fs/kernfs/file.c:195 [inline]
 kernfs_fop_read_iter+0x15d/0x470 fs/kernfs/file.c:242
 call_read_iter include/linux/fs.h:2198 [inline]
 new_sync_read fs/read_write.c:404 [inline]
 vfs_read+0x68b/0xbe0 fs/read_write.c:485

Memory state around the buggy address:
 ffff88811b702300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88811b702380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff88811b702400: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                                             ^
 ffff88811b702480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88811b702500: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
F2FS-fs (loop4): Mounted with checkpoint version = 48b305e5