==================================================================
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 ffff8881e0a41488 by task syz-executor.2/18319

CPU: 1 PID: 18319 Comm: syz-executor.2 Not tainted 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 18117:
 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
 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_track_caller+0xfb/0x290 mm/slub.c:4449
 __kmalloc_reserve net/core/skbuff.c:142 [inline]
 pskb_expand_head+0x10d/0x1060 net/core/skbuff.c:1647
 netlink_trim+0x198/0x230 net/netlink/af_netlink.c:1303
 netlink_broadcast_filtered+0x62/0x1280 net/netlink/af_netlink.c:1508
 netlink_broadcast net/netlink/af_netlink.c:1553 [inline]
 nlmsg_multicast include/net/netlink.h:968 [inline]
 nlmsg_notify+0xf7/0x1b0 net/netlink/af_netlink.c:2552
 __dev_notify_flags+0xe3/0x510 net/core/dev.c:7959
 dev_change_flags+0xe7/0x190 net/core/dev.c:8001
 do_setlink+0xc4c/0x3b70 net/core/rtnetlink.c:2520
 rtnl_group_changelink net/core/rtnetlink.c:3010 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3168 [inline]
 rtnl_newlink+0x10fb/0x2010 net/core/rtnetlink.c:3289
 rtnetlink_rcv_msg+0x983/0xc70 net/core/rtnetlink.c:5262
 netlink_rcv_skb+0x1d5/0x420 net/netlink/af_netlink.c:2509
 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]
 netlink_unicast+0x936/0xb20 net/netlink/af_netlink.c:1347
 netlink_sendmsg+0xa18/0xcf0 net/netlink/af_netlink.c:1943
 sock_sendmsg_nosec net/socket.c:638 [inline]
 sock_sendmsg net/socket.c:658 [inline]
 ____sys_sendmsg+0x5ac/0x8f0 net/socket.c:2287
 ___sys_sendmsg net/socket.c:2341 [inline]
 __sys_sendmsg+0x28b/0x380 net/socket.c:2387
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Freed by task 18117:
 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
 skb_release_all net/core/skbuff.c:675 [inline]
 __kfree_skb net/core/skbuff.c:689 [inline]
 consume_skb+0xa5/0x2a0 net/core/skbuff.c:849
 netlink_broadcast_filtered+0x115f/0x1280 net/netlink/af_netlink.c:1531
 netlink_broadcast net/netlink/af_netlink.c:1553 [inline]
 nlmsg_multicast include/net/netlink.h:968 [inline]
 nlmsg_notify+0xf7/0x1b0 net/netlink/af_netlink.c:2552
 __dev_notify_flags+0xe3/0x510 net/core/dev.c:7959
 dev_change_flags+0xe7/0x190 net/core/dev.c:8001
 do_setlink+0xc4c/0x3b70 net/core/rtnetlink.c:2520
 rtnl_group_changelink net/core/rtnetlink.c:3010 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3168 [inline]
 rtnl_newlink+0x10fb/0x2010 net/core/rtnetlink.c:3289
 rtnetlink_rcv_msg+0x983/0xc70 net/core/rtnetlink.c:5262
 netlink_rcv_skb+0x1d5/0x420 net/netlink/af_netlink.c:2509
 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]
 netlink_unicast+0x936/0xb20 net/netlink/af_netlink.c:1347
 netlink_sendmsg+0xa18/0xcf0 net/netlink/af_netlink.c:1943
 sock_sendmsg_nosec net/socket.c:638 [inline]
 sock_sendmsg net/socket.c:658 [inline]
 ____sys_sendmsg+0x5ac/0x8f0 net/socket.c:2287
 ___sys_sendmsg net/socket.c:2341 [inline]
 __sys_sendmsg+0x28b/0x380 net/socket.c:2387
 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 ffff8881e0a41000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1160 bytes inside of
 2048-byte region [ffff8881e0a41000, ffff8881e0a41800)
The buggy address belongs to the page:
page:ffffea0007829000 refcount:1 mapcount:0 mapping:ffff8881f5c0c000 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 0000000000000000 0000000100000001 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]
 __kmalloc+0x196/0x2b0 mm/slub.c:3909
 kmalloc include/linux/slab.h:561 [inline]
 kzalloc include/linux/slab.h:690 [inline]
 ops_init+0x86/0x4a0 net/core/net_namespace.c:128
 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:2047
 _do_fork+0x197/0x900 kernel/fork.c:2396
 __do_sys_clone kernel/fork.c:2554 [inline]
 __se_sys_clone kernel/fork.c:2535 [inline]
 __x64_sys_clone+0x26b/0x2c0 kernel/fork.c:2535
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]
 kmem_cache_alloc+0xd0/0x220 mm/slub.c:2842
 kmem_cache_zalloc include/linux/slab.h:680 [inline]
 locks_alloc_lock fs/locks.c:346 [inline]
 flock_make_lock fs/locks.c:487 [inline]
 __do_sys_flock fs/locks.c:2234 [inline]
 __se_sys_flock+0x15a/0x5a0 fs/locks.c:2215
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Memory state around the buggy address:
 ffff8881e0a41380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881e0a41400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881e0a41480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff8881e0a41500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881e0a41580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
syz-executor.2 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=0
CPU: 1 PID: 18319 Comm: syz-executor.2 Tainted: G    B             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 14956kB, limit 0kB, failcnt 919
swap: usage 0kB, limit 9007199254740988kB, failcnt 0
Memory cgroup stats for /syz0:
anon 4849664
file 10334208
kernel_stack 0
slab 0
sock 77824
shmem 10301440
file_mapped 135168
file_dirty 135168
file_writeback 0
anon_thp 0
inactive_anon 2162688
active_anon 13246464
inactive_file 135168
active_file 135168
unevictable 0
slab_reclaimable 0
slab_unreclaimable 0
pgfault 491898
pgmajfault 33
workingset_refault 0
workingset_activate 0
workingset_nodereclaim 0
pgrefill 169
pgscan 171
pgsteal 77
pgactivate 99
oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz2,mems_allowed=0,oom_memcg=/syz0,task_memcg=/syz0,task=syz-executor.0,pid=18295,uid=0
Memory cgroup out of memory: Killed process 18295 (syz-executor.0) total-vm:186896kB, anon-rss:4564kB, file-rss:14336kB, shmem-rss:0kB, UID:0 pgtables:100kB oom_score_adj:1000
syz-executor.2 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=0
CPU: 1 PID: 18319 Comm: syz-executor.2 Tainted: G    B             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 10736kB, limit 0kB, failcnt 935
swap: usage 0kB, limit 9007199254740988kB, failcnt 0
Memory cgroup stats for /syz0:
anon 557056
file 10334208
kernel_stack 0
slab 0
sock 77824
shmem 10301440
file_mapped 135168
file_dirty 135168
file_writeback 0
anon_thp 0
inactive_anon 2162688
active_anon 8921088
inactive_file 135168
active_file 135168
unevictable 0
slab_reclaimable 0
slab_unreclaimable 0
pgfault 491898
pgmajfault 33
workingset_refault 0
workingset_activate 0
workingset_nodereclaim 0
pgrefill 169
pgscan 171
pgsteal 77
pgactivate 99
oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz2,mems_allowed=0,oom_memcg=/syz0,task_memcg=/syz0,task=syz-executor.0,pid=7699,uid=0
Memory cgroup out of memory: Killed process 7699 (syz-executor.0) total-vm:48516kB, anon-rss:472kB, file-rss:15316kB, shmem-rss:64kB, UID:0 pgtables:80kB oom_score_adj:0