================================================================== 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 ffff88810e814470 by task kswapd0/46 CPU: 0 PID: 46 Comm: kswapd0 Tainted: G W 5.15.181-syzkaller-00405-gf93c8b5a9e60 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Call Trace: __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 Allocated by task 12418: 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+0x13d/0x2c0 mm/slub.c:4431 __kmalloc_node include/linux/slab.h:484 [inline] kmalloc_node include/linux/slab.h:639 [inline] kvmalloc_node+0x242/0x330 mm/util.c:628 kvmalloc include/linux/mm.h:851 [inline] xt_alloc_table_info+0x3b/0xa0 net/netfilter/x_tables.c:1192 do_replace net/ipv6/netfilter/ip6_tables.c:1145 [inline] do_ip6t_set_ctl+0x86a/0xcf0 net/ipv6/netfilter/ip6_tables.c:1646 nf_setsockopt+0x272/0x2a0 net/netfilter/nf_sockopt.c:101 ipv6_setsockopt+0x2555/0x38a0 net/ipv6/ipv6_sockglue.c:1011 tcp_setsockopt+0x1f8/0x1d30 net/ipv4/tcp.c:3706 sock_common_setsockopt+0xa0/0xb0 net/core/sock.c:3460 __sys_setsockopt+0x2f0/0x460 net/socket.c:2203 __do_sys_setsockopt net/socket.c:2214 [inline] __se_sys_setsockopt net/socket.c:2211 [inline] __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2211 x64_sys_call+0x982/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:55 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 12418: 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 kvfree+0x35/0x40 mm/util.c:664 xt_free_table_info+0x161/0x1a0 net/netfilter/x_tables.c:1212 __do_replace+0x7ac/0x9a0 net/ipv6/netfilter/ip6_tables.c:1103 do_replace net/ipv6/netfilter/ip6_tables.c:1160 [inline] do_ip6t_set_ctl+0x9fd/0xcf0 net/ipv6/netfilter/ip6_tables.c:1646 nf_setsockopt+0x272/0x2a0 net/netfilter/nf_sockopt.c:101 ipv6_setsockopt+0x2555/0x38a0 net/ipv6/ipv6_sockglue.c:1011 tcp_setsockopt+0x1f8/0x1d30 net/ipv4/tcp.c:3706 sock_common_setsockopt+0xa0/0xb0 net/core/sock.c:3460 __sys_setsockopt+0x2f0/0x460 net/socket.c:2203 __do_sys_setsockopt net/socket.c:2214 [inline] __se_sys_setsockopt net/socket.c:2211 [inline] __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2211 x64_sys_call+0x982/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:55 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:3954 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 unregister_netdevice_queue+0x31c/0x360 net/core/dev.c:11083 unregister_vlan_dev+0x221/0x320 net/8021q/vlan.c:118 vlan_ioctl_handler+0x316/0x620 net/8021q/vlan.c:630 sock_ioctl+0x28c/0x6b0 net/socket.c:1221 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0x121/0x1a0 fs/ioctl.c:860 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:860 x64_sys_call+0x2f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17 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 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 delayed_work_timer_fn+0x61/0x80 kernel/workqueue.c:1664 call_timer_fn+0x38/0x290 kernel/time/timer.c:1457 expire_timers kernel/time/timer.c:1497 [inline] __run_timers+0x667/0x9a0 kernel/time/timer.c:1773 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1786 handle_softirqs+0x250/0x560 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 ffff88810e814000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1136 bytes inside of 2048-byte region [ffff88810e814000, ffff88810e814800) The buggy address belongs to the page: page:ffffea00043a0400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10e810 head:ffffea00043a0400 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 0xd2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 281, ts 25509185346, free_ts 25507748862 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:5781 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] pskb_expand_head+0x11b/0x11d0 net/core/skbuff.c:1733 netlink_trim+0x193/0x230 net/netlink/af_netlink.c:1297 netlink_broadcast_filtered+0x75/0x1250 net/netlink/af_netlink.c:1502 netlink_broadcast net/netlink/af_netlink.c:1547 [inline] nlmsg_multicast include/net/netlink.h:1033 [inline] nlmsg_notify+0xed/0x1b0 net/netlink/af_netlink.c:2536 rtnl_notify net/core/rtnetlink.c:759 [inline] rtmsg_ifinfo_send net/core/rtnetlink.c:3908 [inline] rtmsg_ifinfo_event net/core/rtnetlink.c:3923 [inline] rtmsg_ifinfo+0xea/0x130 net/core/rtnetlink.c:3929 __dev_notify_flags+0xdb/0x500 net/core/dev.c:8895 dev_change_flags+0xe8/0x1a0 net/core/dev.c:8937 do_setlink+0xbed/0x3990 net/core/rtnetlink.c:2779 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:5857 __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_kernel+0x59/0x2e0 fs/namei.c:226 kern_path+0x24/0x1b0 fs/namei.c:2581 Memory state around the buggy address: ffff88810e814300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88810e814380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88810e814400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88810e814480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88810e814500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================