==================================================================
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 ffff88815731a470 by task kswapd0/46

CPU: 1 PID: 46 Comm: kswapd0 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
 kswapd_shrink_node mm/vmscan.c:6734 [inline]
 balance_pgdat+0xfb3/0x21d0 mm/vmscan.c:6924
 kswapd+0x649/0xcf0 mm/vmscan.c:7183
 kthread+0x411/0x500 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>

Allocated by task 24984:
 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:433 [inline]
 ____kasan_kmalloc mm/kasan/common.c:512 [inline]
 __kasan_kmalloc+0xda/0x110 mm/kasan/common.c:521
 kasan_kmalloc include/linux/kasan.h:227 [inline]
 __kmalloc_track_caller+0x13c/0x2c0 mm/slub.c:4954
 kmalloc_reserve net/core/skbuff.c:357 [inline]
 pskb_expand_head+0x11b/0x11d0 net/core/skbuff.c:1733
 __skb_cow include/linux/skbuff.h:3398 [inline]
 skb_cow_head include/linux/skbuff.h:3432 [inline]
 erspan_xmit+0x4b2/0x16d0 net/ipv4/ip_gre.c:696
 __netdev_start_xmit include/linux/netdevice.h:5064 [inline]
 netdev_start_xmit include/linux/netdevice.h:5078 [inline]
 xmit_one net/core/dev.c:3657 [inline]
 dev_hard_start_xmit+0x244/0x670 net/core/dev.c:3673
 sch_direct_xmit+0x267/0x8d0 net/sched/sch_generic.c:342
 __dev_xmit_skb net/core/dev.c:3892 [inline]
 __dev_queue_xmit+0x1523/0x2d80 net/core/dev.c:4261
 dev_queue_xmit+0x17/0x20 net/core/dev.c:4329
 neigh_hh_output include/net/neighbour.h:501 [inline]
 neigh_output include/net/neighbour.h:515 [inline]
 ip_finish_output2+0xb7c/0xe60 net/ipv4/ip_output.c:228
 ip_do_fragment+0x8db/0x1ca0 net/ipv4/ip_output.c:913
 ip_fragment+0x152/0x250 net/ipv4/ip_output.c:-1
 __ip_finish_output+0x236/0x360 net/ipv4/ip_output.c:304
 ip_finish_output+0x31/0x240 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:294 [inline]
 ip_output+0x1e1/0x360 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:453 [inline]
 ip_local_out+0x96/0xb0 net/ipv4/ip_output.c:126
 iptunnel_xmit+0x4db/0x8f0 net/ipv4/ip_tunnel_core.c:82
 ip_tunnel_xmit+0x1a2b/0x21c0 net/ipv4/ip_tunnel.c:824
 __gre_xmit net/ipv4/ip_gre.c:474 [inline]
 ipgre_xmit+0x7c0/0xb30 net/ipv4/ip_gre.c:669
 __netdev_start_xmit include/linux/netdevice.h:5064 [inline]
 netdev_start_xmit include/linux/netdevice.h:5078 [inline]
 xmit_one net/core/dev.c:3657 [inline]
 dev_hard_start_xmit+0x244/0x670 net/core/dev.c:3673
 __dev_queue_xmit+0x17bd/0x2d80 net/core/dev.c:4296
 dev_queue_xmit+0x17/0x20 net/core/dev.c:4329
 __bpf_tx_skb net/core/filter.c:2126 [inline]
 __bpf_redirect_no_mac net/core/filter.c:2160 [inline]
 __bpf_redirect+0x68a/0xe60 net/core/filter.c:2183
 ____bpf_clone_redirect net/core/filter.c:2452 [inline]
 bpf_clone_redirect+0x242/0x380 net/core/filter.c:2422
 bpf_prog_208b094576c80b22+0x56/0x914
 bpf_dispatcher_nop_func include/linux/bpf.h:785 [inline]
 __bpf_prog_run include/linux/filter.h:628 [inline]
 bpf_prog_run include/linux/filter.h:635 [inline]
 bpf_test_run+0x33d/0x8d0 net/bpf/test_run.c:119
 bpf_prog_test_run_skb+0x9ec/0x1150 net/bpf/test_run.c:669
 bpf_prog_test_run+0x3d5/0x620 kernel/bpf/syscall.c:3348
 __sys_bpf+0x52c/0x730 kernel/bpf/syscall.c:4651
 __do_sys_bpf kernel/bpf/syscall.c:4737 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4735 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:4735
 x64_sys_call+0x4b9/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:322
 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

Freed by task 24984:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:365
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373
 kasan_slab_free include/linux/kasan.h:193 [inline]
 slab_free_hook mm/slub.c:1723 [inline]
 slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1749
 slab_free mm/slub.c:3521 [inline]
 kfree+0xc4/0x270 mm/slub.c:4583
 skb_free_head net/core/skbuff.c:656 [inline]
 skb_release_data+0x814/0xa10 net/core/skbuff.c:678
 skb_release_all net/core/skbuff.c:743 [inline]
 __kfree_skb net/core/skbuff.c:757 [inline]
 kfree_skb_reason net/core/skbuff.c:778 [inline]
 kfree_skb+0xb9/0x2f0 net/core/skbuff.c:792
 ip_tunnel_xmit+0xe9e/0x21c0 net/ipv4/ip_tunnel.c:834
 __gre_xmit net/ipv4/ip_gre.c:474 [inline]
 erspan_xmit+0x97b/0x16d0 net/ipv4/ip_gre.c:723
 __netdev_start_xmit include/linux/netdevice.h:5064 [inline]
 netdev_start_xmit include/linux/netdevice.h:5078 [inline]
 xmit_one net/core/dev.c:3657 [inline]
 dev_hard_start_xmit+0x244/0x670 net/core/dev.c:3673
 sch_direct_xmit+0x267/0x8d0 net/sched/sch_generic.c:342
 __dev_xmit_skb net/core/dev.c:3892 [inline]
 __dev_queue_xmit+0x1523/0x2d80 net/core/dev.c:4261
 dev_queue_xmit+0x17/0x20 net/core/dev.c:4329
 neigh_hh_output include/net/neighbour.h:501 [inline]
 neigh_output include/net/neighbour.h:515 [inline]
 ip_finish_output2+0xb7c/0xe60 net/ipv4/ip_output.c:228
 ip_do_fragment+0x8db/0x1ca0 net/ipv4/ip_output.c:913
 ip_fragment+0x152/0x250 net/ipv4/ip_output.c:-1
 __ip_finish_output+0x236/0x360 net/ipv4/ip_output.c:304
 ip_finish_output+0x31/0x240 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:294 [inline]
 ip_output+0x1e1/0x360 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:453 [inline]
 ip_local_out+0x96/0xb0 net/ipv4/ip_output.c:126
 iptunnel_xmit+0x4db/0x8f0 net/ipv4/ip_tunnel_core.c:82
 ip_tunnel_xmit+0x1a2b/0x21c0 net/ipv4/ip_tunnel.c:824
 __gre_xmit net/ipv4/ip_gre.c:474 [inline]
 ipgre_xmit+0x7c0/0xb30 net/ipv4/ip_gre.c:669
 __netdev_start_xmit include/linux/netdevice.h:5064 [inline]
 netdev_start_xmit include/linux/netdevice.h:5078 [inline]
 xmit_one net/core/dev.c:3657 [inline]
 dev_hard_start_xmit+0x244/0x670 net/core/dev.c:3673
 __dev_queue_xmit+0x17bd/0x2d80 net/core/dev.c:4296
 dev_queue_xmit+0x17/0x20 net/core/dev.c:4329
 __bpf_tx_skb net/core/filter.c:2126 [inline]
 __bpf_redirect_no_mac net/core/filter.c:2160 [inline]
 __bpf_redirect+0x68a/0xe60 net/core/filter.c:2183
 ____bpf_clone_redirect net/core/filter.c:2452 [inline]
 bpf_clone_redirect+0x242/0x380 net/core/filter.c:2422
 bpf_prog_208b094576c80b22+0x56/0x914
 bpf_dispatcher_nop_func include/linux/bpf.h:785 [inline]
 __bpf_prog_run include/linux/filter.h:628 [inline]
 bpf_prog_run include/linux/filter.h:635 [inline]
 bpf_test_run+0x33d/0x8d0 net/bpf/test_run.c:119
 bpf_prog_test_run_skb+0x9ec/0x1150 net/bpf/test_run.c:669
 bpf_prog_test_run+0x3d5/0x620 kernel/bpf/syscall.c:3348
 __sys_bpf+0x52c/0x730 kernel/bpf/syscall.c:4651
 __do_sys_bpf kernel/bpf/syscall.c:4737 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4735 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:4735
 x64_sys_call+0x4b9/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:322
 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

Last potentially related work creation:
 kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38
 __kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348
 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
 __call_rcu_common kernel/rcu/tree.c:3007 [inline]
 call_rcu+0xf6/0xf60 kernel/rcu/tree.c:3125
 in6_dev_finish_destroy+0x163/0x1b0 net/ipv6/addrconf_core.c:278
 in6_dev_put include/net/addrconf.h:406 [inline]
 addrconf_ifdown+0x1637/0x1880 net/ipv6/addrconf.c:3957
 addrconf_notify+0x3bd/0xde0 net/ipv6/addrconf.c:-1
 notifier_call_chain kernel/notifier.c:83 [inline]
 raw_notifier_call_chain+0x90/0x100 kernel/notifier.c:391
 call_netdevice_notifiers_info net/core/dev.c:2057 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2069 [inline]
 call_netdevice_notifiers net/core/dev.c:2083 [inline]
 unregister_netdevice_many+0xfb8/0x1990 net/core/dev.c:11150
 sit_exit_batch_net+0x607/0x650 net/ipv6/sit.c:1952
 ops_exit_list net/core/net_namespace.c:177 [inline]
 cleanup_net+0x602/0xad0 net/core/net_namespace.c:599
 process_one_work+0x6be/0xba0 kernel/workqueue.c:2325
 worker_thread+0xa59/0x1200 kernel/workqueue.c:2472
 kthread+0x411/0x500 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287

Second to last potentially related work creation:
 kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38
 __kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348
 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
 insert_work+0x51/0x310 kernel/workqueue.c:1373
 __queue_work+0x8e5/0xc60 kernel/workqueue.c:1539
 queue_work_on+0xd2/0x140 kernel/workqueue.c:1566
 queue_work include/linux/workqueue.h:510 [inline]
 schedule_work include/linux/workqueue.h:571 [inline]
 destroy_super_rcu+0xd1/0xe0 fs/super.c:172
 rcu_do_batch+0x51d/0xba0 kernel/rcu/tree.c:2523
 rcu_core+0x5e4/0xf80 kernel/rcu/tree.c:2763
 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2776
 handle_softirqs+0x250/0x560 kernel/softirq.c:583
 __do_softirq kernel/softirq.c:621 [inline]
 invoke_softirq kernel/softirq.c:443 [inline]
 __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:670
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:682
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1108
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:676

The buggy address belongs to the object at ffff88815731a000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1136 bytes inside of
 2048-byte region [ffff88815731a000, ffff88815731a800)
The buggy address belongs to the page:
page:ffffea00055cc600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x157318
head:ffffea00055cc600 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043200
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 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 16586, ts 1163028492032, free_ts 1162384802516
 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_track_caller+0x169/0x2c0 mm/slub.c:4949
 kmalloc_reserve net/core/skbuff.c:357 [inline]
 __alloc_skb+0x21a/0x740 net/core/skbuff.c:428
 alloc_skb include/linux/skbuff.h:1183 [inline]
 nlmsg_new include/net/netlink.h:953 [inline]
 audit_buffer_alloc kernel/audit.c:1799 [inline]
 audit_log_start+0x3c7/0x8b0 kernel/audit.c:1917
 common_lsm_audit+0xd1/0x1600 security/lsm_audit.c:457
 slow_avc_audit+0x1ac/0x220 security/selinux/avc.c:802
 avc_audit security/selinux/include/avc.h:135 [inline]
 cred_has_capability security/selinux/hooks.c:1677 [inline]
 selinux_capable+0x21d/0x380 security/selinux/hooks.c:2193
 security_capable+0x77/0xb0 security/security.c:808
 ns_capable_common kernel/capability.c:375 [inline]
 ns_capable kernel/capability.c:396 [inline]
 capable+0x6d/0xe0 kernel/capability.c:449
 bpf_capable include/linux/capability.h:264 [inline]
 bpf_prog_load+0x34a/0x1550 kernel/bpf/syscall.c:2223
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]
 kmem_cache_alloc+0xf7/0x260 mm/slub.c:3255
 getname_flags+0xb9/0x500 fs/namei.c:138
 getname fs/namei.c:217 [inline]
 __do_sys_symlinkat fs/namei.c:4475 [inline]
 __se_sys_symlinkat fs/namei.c:4472 [inline]
 __x64_sys_symlinkat+0x7c/0xb0 fs/namei.c:4472

Memory state around the buggy address:
 ffff88815731a300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88815731a380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88815731a400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                             ^
 ffff88815731a480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88815731a500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================