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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+0x9dc/0xac0 mm/filemap.c:175
Read of size 4 at addr ffff88813e678470 by task syz.3.7472/16214

CPU: 0 PID: 16214 Comm: syz.3.7472 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x100/0x140 mm/kasan/report.c:452
 __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+0x9dc/0xac0 mm/filemap.c:175
 __delete_from_page_cache+0xc3/0x470 mm/filemap.c:243
 __remove_mapping+0x581/0x6b0 mm/vmscan.c:985
 shrink_page_list+0x21ee/0x4160 mm/vmscan.c:1498
 shrink_inactive_list+0x90c/0xef0 mm/vmscan.c:2075
 shrink_list mm/vmscan.c:2294 [inline]
 shrink_lruvec+0x2806/0x2d70 mm/vmscan.c:5473
 shrink_node_memcgs mm/vmscan.c:5660 [inline]
 shrink_node+0xee0/0x2690 mm/vmscan.c:5690
 shrink_zones mm/vmscan.c:5896 [inline]
 do_try_to_free_pages+0x602/0x1590 mm/vmscan.c:5954
 try_to_free_mem_cgroup_pages+0x261/0x610 mm/vmscan.c:6272
 mem_cgroup_resize_max+0x309/0x3e0 mm/memcontrol.c:3383
 mem_cgroup_write+0x1ed/0x230 mm/memcontrol.c:-1
 cgroup_file_write+0x294/0x560 kernel/cgroup/cgroup.c:3902
 kernfs_fop_write_iter+0x2bd/0x400 fs/kernfs/file.c:296
 call_write_iter include/linux/fs.h:2066 [inline]
 new_sync_write fs/read_write.c:518 [inline]
 vfs_write+0x770/0xd70 fs/read_write.c:605
 ksys_write+0x14a/0x260 fs/read_write.c:658
 __do_sys_write fs/read_write.c:670 [inline]
 __se_sys_write fs/read_write.c:667 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:667
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fc0bc1b0e99
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:00007fc0bac0a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fc0bc438fa0 RCX: 00007fc0bc1b0e99
RDX: 0000000000000002 RSI: 0000200000000080 RDI: 0000000000000003
RBP: 00007fc0bc246eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc0bc439038 R14: 00007fc0bc438fa0 R15: 00007ffdf7ba3988

Allocated by task 399:
 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:430 [inline]
 __kasan_slab_alloc+0xb7/0xe0 mm/kasan/common.c:463
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:580
 slab_alloc_node mm/slub.c:2952 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 kmem_cache_alloc+0x15a/0x2d0 mm/slub.c:2965
 mempool_alloc_slab+0x1d/0x30 mm/mempool.c:513
 mempool_alloc+0x128/0x490 mm/mempool.c:393
 bvec_alloc+0x13e/0x180 block/bio.c:208
 bio_alloc_bioset+0x32b/0x570 block/bio.c:506
 bio_alloc include/linux/bio.h:412 [inline]
 io_submit_init_bio fs/ext4/page-io.c:406 [inline]
 io_submit_add_bh fs/ext4/page-io.c:431 [inline]
 ext4_bio_write_page+0xd00/0x1890 fs/ext4/page-io.c:567
 mpage_submit_page+0x1a8/0x240 fs/ext4/inode.c:2159
 mpage_map_and_submit_buffers fs/ext4/inode.c:2407 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2546 [inline]
 ext4_writepages+0x18ea/0x2f00 fs/ext4/inode.c:2875
 do_writepages+0x12e/0x280 mm/page-writeback.c:2380
 __writeback_single_inode+0xd9/0xa30 fs/fs-writeback.c:1470
 writeback_sb_inodes+0x96d/0x1680 fs/fs-writeback.c:1733
 __writeback_inodes_wb fs/fs-writeback.c:1804 [inline]
 wb_writeback+0x4be/0xb80 fs/fs-writeback.c:1910
 wb_check_old_data_flush fs/fs-writeback.c:2012 [inline]
 wb_do_writeback fs/fs-writeback.c:2065 [inline]
 wb_workfn+0xa49/0xf30 fs/fs-writeback.c:2094
 process_one_work+0x6fd/0xbc0 kernel/workqueue.c:2301
 worker_thread+0xa8e/0x13c0 kernel/workqueue.c:2447
 kthread+0x324/0x3b0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

The buggy address belongs to the object at ffff88813e678000
 which belongs to the cache biovec-max of size 4096
The buggy address is located 1136 bytes inside of
 4096-byte region [ffff88813e678000, ffff88813e679000)
The buggy address belongs to the page:
page:ffffea0004f99e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13e678
head:ffffea0004f99e00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff888107d92000
raw: 0000000000000000 0000000080070007 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 0x1d2800(GFP_NOWAIT|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 9, ts 182662342148, free_ts 182392912104
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x176/0x190 mm/page_alloc.c:2462
 get_page_from_freelist+0x225f/0x23f0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x29a/0x640 mm/page_alloc.c:5384
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1813 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1874
 new_slab_objects mm/slub.c:2632 [inline]
 ___slab_alloc+0x2f8/0x4c0 mm/slub.c:2796
 __slab_alloc+0x63/0xa0 mm/slub.c:2836
 slab_alloc_node mm/slub.c:2918 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 kmem_cache_alloc+0x1a4/0x2d0 mm/slub.c:2965
 mempool_alloc_slab+0x1d/0x30 mm/mempool.c:513
 mempool_alloc+0x128/0x490 mm/mempool.c:393
 bvec_alloc+0x13e/0x180 block/bio.c:208
 bio_alloc_bioset+0x32b/0x570 block/bio.c:506
 bio_alloc include/linux/bio.h:412 [inline]
 io_submit_init_bio fs/ext4/page-io.c:406 [inline]
 io_submit_add_bh fs/ext4/page-io.c:431 [inline]
 ext4_bio_write_page+0xd00/0x1890 fs/ext4/page-io.c:567
 mpage_submit_page+0x1a8/0x240 fs/ext4/inode.c:2159
 mpage_process_page_bufs+0x6b2/0x7f0 fs/ext4/inode.c:2273
 mpage_prepare_extent_to_map+0x9be/0xcb0 fs/ext4/inode.c:2701
 ext4_writepages+0xa34/0x2f00 fs/ext4/inode.c:2829
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 __free_pages_ok+0x80b/0x830 mm/page_alloc.c:1629
 free_the_page mm/page_alloc.c:5445 [inline]
 __free_pages+0xd8/0x390 mm/page_alloc.c:5454
 __free_slab+0xcf/0x190 mm/slub.c:1899
 free_slab mm/slub.c:1914 [inline]
 discard_slab mm/slub.c:1920 [inline]
 unfreeze_partials+0x150/0x180 mm/slub.c:2415
 put_cpu_partial+0xc1/0x180 mm/slub.c:2451
 __slab_free+0x2c9/0x3a0 mm/slub.c:3100
 do_slab_free mm/slub.c:3196 [inline]
 ___cache_free+0x10e/0x130 mm/slub.c:3215
 qlink_free+0x50/0x90 mm/kasan/quarantine.c:157
 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x14a/0x160 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:440
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:580
 slab_alloc_node mm/slub.c:2952 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 kmem_cache_alloc+0x15a/0x2d0 mm/slub.c:2965
 kmem_cache_alloc_node include/linux/slab.h:426 [inline]
 alloc_task_struct_node kernel/fork.c:177 [inline]
 dup_task_struct+0x57/0xbd0 kernel/fork.c:912
 copy_process+0x5dd/0x3320 kernel/fork.c:2101
 kernel_clone+0x233/0x950 kernel/fork.c:2650

Memory state around the buggy address:
 ffff88813e678300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88813e678380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88813e678400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                             ^
 ffff88813e678480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88813e678500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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