==================================================================
BUG: KASAN: use-after-free in cleancache_fs_enabled_mapping include/linux/cleancache.h:54 [inline]
BUG: KASAN: use-after-free in cleancache_invalidate_page include/linux/cleancache.h:108 [inline]
BUG: KASAN: use-after-free in unaccount_page_cache_page+0x639/0x6b0 mm/filemap.c:169
Read of size 4 at addr ffff8881eb5ff488 by task syz-executor.2/9382

CPU: 1 PID: 9382 Comm: syz-executor.2 Tainted: G        W         5.4.233-syzkaller-00019-gd5ed2ca98e48 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d8/0x241 lib/dump_stack.c:118
 print_address_description+0x8c/0x600 mm/kasan/report.c:384
 __kasan_report+0xf3/0x120 mm/kasan/report.c:516
 kasan_report+0x30/0x60 mm/kasan/common.c:653
 cleancache_fs_enabled_mapping include/linux/cleancache.h:54 [inline]
 cleancache_invalidate_page include/linux/cleancache.h:108 [inline]
 unaccount_page_cache_page+0x639/0x6b0 mm/filemap.c:169
 __delete_from_page_cache+0xc3/0x510 mm/filemap.c:237
 __remove_mapping+0x46e/0x550 mm/vmscan.c:978
 shrink_page_list+0x2467/0x3e70 mm/vmscan.c:1482
 shrink_inactive_list+0x4f6/0xfd0 mm/vmscan.c:2001
 shrink_list mm/vmscan.c:2293 [inline]
 shrink_node_memcg+0xc42/0x2430 mm/vmscan.c:2623
 shrink_node+0x396/0x12b0 mm/vmscan.c:2836
 shrink_zones mm/vmscan.c:3053 [inline]
 do_try_to_free_pages+0x625/0x1280 mm/vmscan.c:3111
 try_to_free_mem_cgroup_pages+0x3f6/0x9b0 mm/vmscan.c:3412
 memory_max_write+0x235/0x3c0 mm/memcontrol.c:6220
 cgroup_file_write+0x275/0x5c0 kernel/cgroup/cgroup.c:3898
 kernfs_fop_write+0x2e2/0x3e0 fs/kernfs/file.c:315
 __vfs_write+0x103/0x750 fs/read_write.c:494
 vfs_write+0x206/0x4e0 fs/read_write.c:558
 ksys_write+0x199/0x2c0 fs/read_write.c:611
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Allocated by task 9246:
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 __kasan_kmalloc+0x130/0x1d0 mm/kasan/common.c:529
 kmalloc_array include/linux/slab.h:618 [inline]
 kcalloc include/linux/slab.h:629 [inline]
 iter_file_splice_write+0x270/0xf60 fs/splice.c:690
 splice_direct_to_actor+0x497/0xae0 fs/splice.c:976
 do_splice_direct+0x27f/0x3c0 fs/splice.c:1064
 do_sendfile+0x854/0xee0 fs/read_write.c:1464
 __do_sys_sendfile64 fs/read_write.c:1519 [inline]
 __se_sys_sendfile64 fs/read_write.c:1511 [inline]
 __x64_sys_sendfile64+0x163/0x230 fs/read_write.c:1511
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Freed by task 9246:
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 kasan_set_free_info mm/kasan/common.c:345 [inline]
 __kasan_slab_free+0x178/0x230 mm/kasan/common.c:487
 slab_free_hook mm/slub.c:1455 [inline]
 slab_free_freelist_hook mm/slub.c:1494 [inline]
 slab_free mm/slub.c:3080 [inline]
 kfree+0xeb/0x320 mm/slub.c:4071
 iter_file_splice_write+0xcf6/0xf60 fs/splice.c:773
 splice_direct_to_actor+0x497/0xae0 fs/splice.c:976
 do_splice_direct+0x27f/0x3c0 fs/splice.c:1064
 do_sendfile+0x854/0xee0 fs/read_write.c:1464
 __do_sys_sendfile64 fs/read_write.c:1519 [inline]
 __se_sys_sendfile64 fs/read_write.c:1511 [inline]
 __x64_sys_sendfile64+0x163/0x230 fs/read_write.c:1511
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

The buggy address belongs to the object at ffff8881eb5ff400
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 136 bytes inside of
 256-byte region [ffff8881eb5ff400, ffff8881eb5ff500)
The buggy address belongs to the page:
page:ffffea0007ad7f80 refcount:1 mapcount:0 mapping:ffff8881f5c02780 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f5c02780
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL)
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook mm/page_alloc.c:2165 [inline]
 prep_new_page+0x18f/0x370 mm/page_alloc.c:2171
 get_page_from_freelist+0x2ce8/0x2d70 mm/page_alloc.c:3794
 __alloc_pages_nodemask+0x393/0x840 mm/page_alloc.c:4891
 alloc_slab_page+0x39/0x3c0 mm/slub.c:343
 allocate_slab mm/slub.c:1683 [inline]
 new_slab+0x97/0x440 mm/slub.c:1749
 new_slab_objects mm/slub.c:2505 [inline]
 ___slab_alloc+0x2fe/0x490 mm/slub.c:2667
 __slab_alloc+0x5a/0x90 mm/slub.c:2707
 slab_alloc_node mm/slub.c:2792 [inline]
 slab_alloc mm/slub.c:2837 [inline]
 __kmalloc+0x196/0x2b0 mm/slub.c:3909
 kmalloc_array include/linux/slab.h:618 [inline]
 kcalloc include/linux/slab.h:629 [inline]
 iter_file_splice_write+0x270/0xf60 fs/splice.c:690
 splice_direct_to_actor+0x497/0xae0 fs/splice.c:976
 do_splice_direct+0x27f/0x3c0 fs/splice.c:1064
 do_sendfile+0x854/0xee0 fs/read_write.c:1464
 __do_sys_sendfile64 fs/read_write.c:1519 [inline]
 __se_sys_sendfile64 fs/read_write.c:1511 [inline]
 __x64_sys_sendfile64+0x163/0x230 fs/read_write.c:1511
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1176 [inline]
 __free_pages_ok+0x83d/0x940 mm/page_alloc.c:1438
 free_the_page mm/page_alloc.c:4953 [inline]
 __free_pages+0x91/0x140 mm/page_alloc.c:4959
 __free_slab+0x221/0x2e0 mm/slub.c:1774
 __slab_free+0x33e/0x350 mm/slub.c:3012
 qlist_free_all+0x43/0xb0 mm/kasan/quarantine.c:167
 quarantine_reduce+0x174/0x190 mm/kasan/quarantine.c:260
 __kasan_kmalloc+0x43/0x1d0 mm/kasan/common.c:507
 slab_post_alloc_hook mm/slab.h:584 [inline]
 slab_alloc_node mm/slub.c:2829 [inline]
 slab_alloc mm/slub.c:2837 [inline]
 __kmalloc+0x100/0x2b0 mm/slub.c:3909
 kmalloc_array include/linux/slab.h:618 [inline]
 kcalloc include/linux/slab.h:629 [inline]
 iter_file_splice_write+0x270/0xf60 fs/splice.c:690
 splice_direct_to_actor+0x497/0xae0 fs/splice.c:976
 do_splice_direct+0x27f/0x3c0 fs/splice.c:1064
 do_sendfile+0x854/0xee0 fs/read_write.c:1464
 __do_sys_sendfile64 fs/read_write.c:1519 [inline]
 __se_sys_sendfile64 fs/read_write.c:1511 [inline]
 __x64_sys_sendfile64+0x163/0x230 fs/read_write.c:1511
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Memory state around the buggy address:
 ffff8881eb5ff380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881eb5ff400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881eb5ff480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff8881eb5ff500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881eb5ff580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
syz-executor.2 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=1000
CPU: 1 PID: 9382 Comm: syz-executor.2 Tainted: G    B   W         5.4.233-syzkaller-00019-gd5ed2ca98e48 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d8/0x241 lib/dump_stack.c:118
 dump_header+0xd5/0x670 mm/oom_kill.c:460
 oom_kill_process+0xeb/0x2c0 mm/oom_kill.c:974
 out_of_memory+0x5e1/0x890 mm/oom_kill.c:1111
 mem_cgroup_out_of_memory+0x211/0x270 mm/memcontrol.c:1611
 memory_max_write+0x331/0x3c0 mm/memcontrol.c:6227
 cgroup_file_write+0x275/0x5c0 kernel/cgroup/cgroup.c:3898
 kernfs_fop_write+0x2e2/0x3e0 fs/kernfs/file.c:315
 __vfs_write+0x103/0x750 fs/read_write.c:494
 vfs_write+0x206/0x4e0 fs/read_write.c:558
 ksys_write+0x199/0x2c0 fs/read_write.c:611
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
memory: usage 23444kB, limit 0kB, failcnt 0
swap: usage 0kB, limit 9007199254740988kB, failcnt 0
Memory cgroup stats for /syz0:
anon 23920640
file 217088
kernel_stack 0
slab 0
sock 4096
shmem 163840
file_mapped 135168
file_dirty 0
file_writeback 0
anon_thp 0
inactive_anon 135168
active_anon 23789568
inactive_file 0
active_file 90112
unevictable 0
slab_reclaimable 0
slab_unreclaimable 0
pgfault 515592
pgmajfault 0
workingset_refault 0
workingset_activate 0
workingset_nodereclaim 0
pgrefill 72
pgscan 74
pgsteal 33
pgactivate 7590
oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz2,mems_allowed=0,oom_memcg=/syz0,task_memcg=/syz0,task=syz-executor.0,pid=7286,uid=0
Memory cgroup out of memory: Killed process 7286 (syz-executor.0) total-vm:54800kB, anon-rss:4644kB, file-rss:14336kB, shmem-rss:0kB, UID:0 pgtables:92kB oom_score_adj:1000
syz-executor.2 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=1000
CPU: 1 PID: 9382 Comm: syz-executor.2 Tainted: G    B   W         5.4.233-syzkaller-00019-gd5ed2ca98e48 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d8/0x241 lib/dump_stack.c:118
 dump_header+0xd5/0x670 mm/oom_kill.c:460
 oom_kill_process+0xeb/0x2c0 mm/oom_kill.c:974
 out_of_memory+0x5e1/0x890 mm/oom_kill.c:1111
 mem_cgroup_out_of_memory+0x211/0x270 mm/memcontrol.c:1611
 memory_max_write+0x331/0x3c0 mm/memcontrol.c:6227
 cgroup_file_write+0x275/0x5c0 kernel/cgroup/cgroup.c:3898
 kernfs_fop_write+0x2e2/0x3e0 fs/kernfs/file.c:315
 __vfs_write+0x103/0x750 fs/read_write.c:494
 vfs_write+0x206/0x4e0 fs/read_write.c:558
 ksys_write+0x199/0x2c0 fs/read_write.c:611
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
memory: usage 19196kB, limit 0kB, failcnt 0
swap: usage 0kB, limit 9007199254740988kB, failcnt 0
Memory cgroup stats for /syz0:
anon 19537920
file 217088
kernel_stack 0
slab 0
sock 4096
shmem 163840
file_mapped 135168
file_dirty 0
file_writeback 0
anon_thp 0
inactive_anon 135168
active_anon 19599360
inactive_file 0
active_file 90112
unevictable 0
slab_reclaimable 0
slab_unreclaimable 0
pgfault 515592
pgmajfault 0
workingset_refault 0
workingset_activate 0
workingset_nodereclaim 0
pgrefill 72
pgscan 74
pgsteal 33
pgactivate 7590
oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz2,mems_allowed=0,oom_memcg=/syz0,task_memcg=/syz0,task=syz-executor.0,pid=7245,uid=0
Memory cgroup out of memory: Killed process 7245 (syz-executor.0) total-vm:54800kB, anon-rss:4644kB, file-rss:14336kB, shmem-rss:0kB, UID:0 pgtables:92kB oom_score_adj:1000
syz-executor.2 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=1000
CPU: 1 PID: 9382 Comm: syz-executor.2 Tainted: G    B   W         5.4.233-syzkaller-00019-gd5ed2ca98e48 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d8/0x241 lib/dump_stack.c:118
 dump_header+0xd5/0x670 mm/oom_kill.c:460
 oom_kill_process+0xeb/0x2c0 mm/oom_kill.c:974
 out_of_memory+0x5e1/0x890 mm/oom_kill.c:1111
 mem_cgroup_out_of_memory+0x211/0x270 mm/memcontrol.c:1611
 memory_max_write+0x331/0x3c0 mm/memcontrol.c:6227
 cgroup_file_write+0x275/0x5c0 kernel/cgroup/cgroup.c:3898
 kernfs_fop_write+0x2e2/0x3e0 fs/kernfs/file.c:315
 __vfs_write+0x103/0x750 fs/read_write.c:494
 vfs_write+0x206/0x4e0 fs/read_write.c:558
 ksys_write+0x199/0x2c0 fs/read_write.c:611
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
memory: usage 14952kB, limit 0kB, failcnt 0
swap: usage 0kB, limit 9007199254740988kB, failcnt 0
Memory cgroup stats for /syz0:
anon 15192064
file 217088
kernel_stack 0
slab 0
sock 4096
shmem 163840
file_mapped 135168
file_dirty 0
file_writeback 0
anon_thp 0
inactive_anon 135168
active_anon 15273984
inactive_file 0
active_file 90112
unevictable 0
slab_reclaimable 0
slab_unreclaimable 0
pgfault 515592
pgmajfault 0
workingset_refault 0
workingset_activate 0
workingset_nodereclaim 0
pgrefill 72
pgscan 74
pgsteal 33
pgactivate 7590
oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz2,mems_allowed=0,oom_memcg=/syz0,task_memcg=/syz0,task=syz-executor.0,pid=7217,uid=0
Memory cgroup out of memory: Killed process 7217 (syz-executor.0) total-vm:54800kB, anon-rss:4644kB, file-rss:14336kB, shmem-rss:0kB, UID:0 pgtables:92kB oom_score_adj:1000