================================================================== 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+0x6d8/0x750 mm/filemap.c:167 Read of size 4 at addr ffff88810cc73470 by task kswapd0/46 CPU: 1 PID: 46 Comm: kswapd0 Not tainted 5.15.173-syzkaller-00161-gb4bd207b0380 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1c0 lib/dump_stack.c:106 print_address_description+0x87/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x179/0x1c0 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+0x6d8/0x750 mm/filemap.c:167 __delete_from_page_cache+0xc6/0x5b0 mm/filemap.c:235 __remove_mapping+0x566/0x690 mm/vmscan.c:1201 shrink_page_list+0x2723/0x5c50 mm/vmscan.c:1798 shrink_inactive_list mm/vmscan.c:2305 [inline] shrink_list mm/vmscan.c:2550 [inline] shrink_lruvec+0x17ec/0x4580 mm/vmscan.c:5755 shrink_node_memcgs mm/vmscan.c:5947 [inline] shrink_node+0x1083/0x2550 mm/vmscan.c:5977 kswapd_shrink_node mm/vmscan.c:6727 [inline] balance_pgdat+0x15e1/0x2f50 mm/vmscan.c:6917 kswapd+0x698/0xd60 mm/vmscan.c:7176 kthread+0x421/0x510 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Allocated by task 10: 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+0xdb/0x110 mm/kasan/common.c:512 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] __kmalloc_track_caller+0x13e/0x2c0 mm/slub.c:4954 kmalloc_reserve net/core/skbuff.c:357 [inline] __alloc_skb+0x10c/0x550 net/core/skbuff.c:428 alloc_skb include/linux/skbuff.h:1183 [inline] nlmsg_new include/net/netlink.h:953 [inline] inet6_ifinfo_notify+0x70/0x110 net/ipv6/addrconf.c:6088 addrconf_notify+0xa8d/0xdd0 net/ipv6/addrconf.c:3705 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x8c/0xf0 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2026 [inline] netdev_state_change+0x1a3/0x250 net/core/dev.c:1417 linkwatch_do_dev+0x110/0x160 net/core/link_watch.c:167 __linkwatch_run_queue+0x4ca/0x7f0 net/core/link_watch.c:213 linkwatch_event+0x4c/0x60 net/core/link_watch.c:252 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472 kthread+0x421/0x510 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Freed by task 10: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x126/0x160 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+0xbd/0x190 mm/slub.c:1749 slab_free mm/slub.c:3521 [inline] kfree+0xcc/0x270 mm/slub.c:4583 skb_free_head net/core/skbuff.c:656 [inline] skb_release_data+0x8a9/0xa80 net/core/skbuff.c:678 skb_release_all net/core/skbuff.c:743 [inline] __kfree_skb net/core/skbuff.c:757 [inline] consume_skb+0xac/0x250 net/core/skbuff.c:930 netlink_broadcast_filtered+0x10f4/0x1220 net/netlink/af_netlink.c:1540 netlink_broadcast net/netlink/af_netlink.c:1562 [inline] nlmsg_multicast include/net/netlink.h:1033 [inline] nlmsg_notify+0x101/0x1c0 net/netlink/af_netlink.c:2551 rtnl_notify+0x9c/0xd0 net/core/rtnetlink.c:759 inet6_ifinfo_notify+0xbc/0x110 net/ipv6/addrconf.c:6099 addrconf_notify+0xa8d/0xdd0 net/ipv6/addrconf.c:3705 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x8c/0xf0 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2026 [inline] netdev_state_change+0x1a3/0x250 net/core/dev.c:1417 linkwatch_do_dev+0x110/0x160 net/core/link_watch.c:167 __linkwatch_run_queue+0x4ca/0x7f0 net/core/link_watch.c:213 linkwatch_event+0x4c/0x60 net/core/link_watch.c:252 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472 kthread+0x421/0x510 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd3/0xf0 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+0x123/0x10b0 kernel/rcu/tree.c:3125 in6_dev_finish_destroy+0x15a/0x1b0 net/ipv6/addrconf_core.c:278 in6_dev_put include/net/addrconf.h:406 [inline] addrconf_ifdown+0x1893/0x1ae0 net/ipv6/addrconf.c:3954 addrconf_notify+0x37d/0xdd0 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x8c/0xf0 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2026 [inline] call_netdevice_notifiers_extack net/core/dev.c:2038 [inline] call_netdevice_notifiers net/core/dev.c:2052 [inline] unregister_netdevice_many+0xe0a/0x17c0 net/core/dev.c:11118 ip_tunnel_delete_nets+0x33b/0x380 net/ipv4/ip_tunnel.c:1137 ipgre_tap_exit_batch_net+0x22/0x30 net/ipv4/ip_gre.c:1711 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x6ce/0xc00 net/core/net_namespace.c:599 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472 kthread+0x421/0x510 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+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd3/0xf0 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 insert_work+0x56/0x320 kernel/workqueue.c:1373 __queue_work+0x92a/0xcd0 kernel/workqueue.c:1539 queue_work_on+0x105/0x170 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+0x57a/0xc10 kernel/rcu/tree.c:2523 rcu_core+0x517/0x1020 kernel/rcu/tree.c:2763 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2776 handle_softirqs+0x25e/0x5c0 kernel/softirq.c:565 __do_softirq kernel/softirq.c:603 [inline] invoke_softirq kernel/softirq.c:425 [inline] __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:652 irq_exit_rcu+0x9/0x10 kernel/softirq.c:664 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 ffff88810cc73000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1136 bytes inside of 2048-byte region [ffff88810cc73000, ffff88810cc73800) The buggy address belongs to the page: page:ffffea0004331c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10cc70 head:ffffea0004331c00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 0000000000000000 0000000100000001 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 288, ts 21447117928, free_ts 21442920632 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2605 prep_new_page+0x1b/0x110 mm/page_alloc.c:2611 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4485 __alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5779 allocate_slab mm/slub.c:1932 [inline] new_slab+0x9a/0x4e0 mm/slub.c:1995 ___slab_alloc+0x39e/0x830 mm/slub.c:3028 __slab_alloc+0x4a/0x90 mm/slub.c:3115 slab_alloc_node mm/slub.c:3206 [inline] slab_alloc mm/slub.c:3250 [inline] __kmalloc_track_caller+0x171/0x2c0 mm/slub.c:4949 kmemdup+0x24/0x50 mm/util.c:132 neigh_sysctl_register+0xb0/0x530 net/core/neighbour.c:3647 addrconf_sysctl_register+0xae/0x1a0 net/ipv6/addrconf.c:7182 ipv6_add_dev+0xc84/0x1140 net/ipv6/addrconf.c:454 addrconf_notify+0x593/0xdd0 net/ipv6/addrconf.c:3599 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x8c/0xf0 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2026 [inline] call_netdevice_notifiers_extack net/core/dev.c:2038 [inline] call_netdevice_notifiers+0x145/0x1b0 net/core/dev.c:2052 register_netdevice+0x1035/0x1390 net/core/dev.c:10404 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+0x7c8/0x7d0 mm/page_alloc.c:3534 free_unref_page+0xe8/0x750 mm/page_alloc.c:3616 free_the_page mm/page_alloc.c:805 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5855 __free_slab+0xec/0x1d0 mm/slub.c:2020 free_slab mm/slub.c:2035 [inline] discard_slab mm/slub.c:2041 [inline] __unfreeze_partials+0x165/0x1a0 mm/slub.c:2527 put_cpu_partial+0xc4/0x120 mm/slub.c:2607 __slab_free+0x1c8/0x290 mm/slub.c:3390 do_slab_free mm/slub.c:3509 [inline] ___cache_free+0x109/0x120 mm/slub.c:3530 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157 qlist_free_all+0x44/0xb0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:443 kasan_slab_alloc include/linux/kasan.h:217 [inline] slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550 slab_alloc_node mm/slub.c:3240 [inline] slab_alloc mm/slub.c:3250 [inline] kmem_cache_alloc_trace+0xf9/0x270 mm/slub.c:3267 kmalloc include/linux/slab.h:603 [inline] kzalloc include/linux/slab.h:733 [inline] kobject_uevent_env+0x269/0x700 lib/kobject_uevent.c:539 kobject_uevent+0x1f/0x30 lib/kobject_uevent.c:657 Memory state around the buggy address: ffff88810cc73300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88810cc73380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88810cc73400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88810cc73480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88810cc73500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================