==================================================================
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 ffff8881dce77488 by task syz-executor.4/11171

CPU: 1 PID: 11171 Comm: syz-executor.4 Not tainted 5.4.233-syzkaller-00032-g21086923c1e6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
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 10945:
 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 include/linux/slab.h:561 [inline]
 kzalloc include/linux/slab.h:690 [inline]
 __register_sysctl_table+0xdb/0x11d0 fs/proc/proc_sysctl.c:1332
 __addrconf_sysctl_register+0x28f/0x3e0 net/ipv6/addrconf.c:6945
 addrconf_init_net+0x242/0x440 net/ipv6/addrconf.c:7040
 ops_init+0x1d4/0x4a0 net/core/net_namespace.c:138
 setup_net+0x214/0x990 net/core/net_namespace.c:345
 copy_net_ns+0x30f/0x510 net/core/net_namespace.c:486
 create_new_namespaces+0x47a/0x570 kernel/nsproxy.c:103
 copy_namespaces+0x169/0x1b0 kernel/nsproxy.c:161
 copy_process+0x12da/0x3230 kernel/fork.c:2044
 _do_fork+0x197/0x900 kernel/fork.c:2391
 __do_sys_clone kernel/fork.c:2549 [inline]
 __se_sys_clone kernel/fork.c:2530 [inline]
 __x64_sys_clone+0x26b/0x2c0 kernel/fork.c:2530
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Freed by task 9:
 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
 __rcu_reclaim kernel/rcu/rcu.h:215 [inline]
 rcu_do_batch+0x451/0xa00 kernel/rcu/tree.c:2167
 rcu_core+0x4c8/0xcb0 kernel/rcu/tree.c:2387
 __do_softirq+0x22e/0x630 kernel/softirq.c:292

The buggy address belongs to the object at ffff8881dce77000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1160 bytes inside of
 2048-byte region [ffff8881dce77000, ffff8881dce77800)
The buggy address belongs to the page:
page:ffffea0007739c00 refcount:1 mapcount:0 mapping:ffff8881f5c0c000 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f5c0c000
raw: 0000000000000000 0000000000080008 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)
 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]
 kmem_cache_alloc_trace+0x128/0x240 mm/slub.c:2854
 kmalloc include/linux/slab.h:556 [inline]
 kzalloc include/linux/slab.h:690 [inline]
 alloc_super+0x56/0x760 fs/super.c:203
 sget+0x1f1/0x4d0 fs/super.c:613
 mount_bdev+0xe4/0x340 fs/super.c:1390
 legacy_get_tree+0xdf/0x170 fs/fs_context.c:647
 vfs_get_tree+0x85/0x260 fs/super.c:1547
 do_new_mount+0x292/0x570 fs/namespace.c:2843
 do_mount+0x688/0xdd0 fs/namespace.c:3163
 ksys_mount+0xc2/0xf0 fs/namespace.c:3372
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_pcp_prepare mm/page_alloc.c:1233 [inline]
 free_unref_page_prepare+0x297/0x380 mm/page_alloc.c:3085
 free_unref_page_list+0x10a/0x590 mm/page_alloc.c:3154
 release_pages+0xa06/0xa40 mm/swap.c:842
 __pagevec_release+0xc3/0x150 mm/swap.c:862
 pagevec_release include/linux/pagevec.h:88 [inline]
 truncate_inode_pages_range+0x7b7/0x1620 mm/truncate.c:367
 f2fs_evict_inode+0x113/0x11e0 fs/f2fs/inode.c:740
 evict+0x29b/0x6a0 fs/inode.c:575
 dispose_list fs/inode.c:610 [inline]
 evict_inodes+0x5db/0x660 fs/inode.c:660
 generic_shutdown_super+0x94/0x2a0 fs/super.c:454
 kill_block_super+0x7a/0xe0 fs/super.c:1444
 kill_f2fs_super+0x2f9/0x3c0 fs/f2fs/super.c:4355
 deactivate_locked_super+0xa8/0x110 fs/super.c:335
 deactivate_super+0x1e2/0x2a0 fs/super.c:366
 cleanup_mnt+0x419/0x4d0 fs/namespace.c:1102
 task_work_run+0x140/0x170 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x18b/0x1a0 arch/x86/entry/common.c:163

Memory state around the buggy address:
 ffff8881dce77380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881dce77400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881dce77480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff8881dce77500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881dce77580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
syz-executor.4 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=1000
CPU: 1 PID: 11171 Comm: syz-executor.4 Tainted: G    B             5.4.233-syzkaller-00032-g21086923c1e6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
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 9032kB, limit 0kB, failcnt 8
swap: usage 0kB, limit 9007199254740988kB, failcnt 0
Memory cgroup stats for /syz0:
anon 1028096
file 8253440
kernel_stack 0
slab 0
sock 4096
shmem 8310784
file_mapped 405504
file_dirty 135168
file_writeback 0
anon_thp 0
inactive_anon 135168
active_anon 9191424
inactive_file 135168
active_file 167936
unevictable 0
slab_reclaimable 0
slab_unreclaimable 0
pgfault 1406658
pgmajfault 0
workingset_refault 0
workingset_activate 0
workingset_nodereclaim 0
pgrefill 154
pgscan 175
pgsteal 84
pgactivate 132
oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz4,mems_allowed=0,oom_memcg=/syz0,task_memcg=/syz0,task=syz-executor.0,pid=21811,uid=0
Memory cgroup out of memory: Killed process 21811 (syz-executor.0) total-vm:48516kB, anon-rss:472kB, file-rss:15236kB, shmem-rss:64kB, UID:0 pgtables:88kB oom_score_adj:0
syz-executor.4 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=1000
CPU: 0 PID: 11171 Comm: syz-executor.4 Tainted: G    B             5.4.233-syzkaller-00032-g21086923c1e6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
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 8632kB, limit 0kB, failcnt 87
swap: usage 0kB, limit 9007199254740988kB, failcnt 0
Memory cgroup stats for /syz0:
anon 77824
file 8253440
kernel_stack 0
slab 0
sock 4096
shmem 8310784
file_mapped 405504
file_dirty 135168
file_writeback 0
anon_thp 0
inactive_anon 135168
active_anon 8245248
inactive_file 135168
active_file 167936
unevictable 0
slab_reclaimable 0
slab_unreclaimable 0
pgfault 1406658
pgmajfault 0
workingset_refault 0
workingset_activate 0
workingset_nodereclaim 0
pgrefill 319
pgscan 311
pgsteal 84
pgactivate 297
oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz4,mems_allowed=0,oom_memcg=/syz0,task_memcg=/syz0,task=syz-executor.0,pid=3084,uid=0
syz-executor.4 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=1000
CPU: 0 PID: 11171 Comm: syz-executor.4 Tainted: G    B             5.4.233-syzkaller-00032-g21086923c1e6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
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
 out_of_memory+0x642/0x890 mm/oom_kill.c:1100
 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 8036kB, limit 0kB, failcnt 87
swap: usage 0kB, limit 9007199254740988kB, failcnt 0
Memory cgroup stats for /syz0:
anon 77824
file 8253440
kernel_stack 0
slab 0
sock 4096
shmem 8310784
file_mapped 405504
file_dirty 135168
file_writeback 0
anon_thp 0
inactive_anon 135168
active_anon 8245248
inactive_file 135168
active_file 167936
unevictable 0
slab_reclaimable 0
slab_unreclaimable 0
pgfault 1406658
pgmajfault 0
workingset_refault 0
workingset_activate 0
workingset_nodereclaim 0
pgrefill 319
pgscan 311
pgsteal 84
pgactivate 297
Out of memory and no killable processes...