================================================================== BUG: KASAN: slab-out-of-bounds in cleancache_fs_enabled_mapping include/linux/cleancache.h:56 [inline] BUG: KASAN: slab-out-of-bounds in cleancache_invalidate_page include/linux/cleancache.h:110 [inline] BUG: KASAN: slab-out-of-bounds in unaccount_page_cache_page+0x9e0/0xac0 mm/filemap.c:175 Read of size 4 at addr ffff888105d88470 by task udevd/94 CPU: 0 PID: 94 Comm: udevd Tainted: G W 5.10.236-syzkaller-00012-gab07aeb2c93d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack+0x21/0x24 lib/dump_stack.c:77 dump_stack_lvl+0x169/0x1d8 lib/dump_stack.c:118 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:435 [inline] kasan_report+0xe2/0x130 mm/kasan/report.c:452 __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+0x9e0/0xac0 mm/filemap.c:175 __delete_from_page_cache+0xc4/0x460 mm/filemap.c:243 __remove_mapping+0x562/0x690 mm/vmscan.c:985 shrink_page_list+0x2109/0x4120 mm/vmscan.c:1498 shrink_inactive_list+0x4f4/0xe80 mm/vmscan.c:2075 shrink_list mm/vmscan.c:2294 [inline] shrink_lruvec+0x2246/0x2770 mm/vmscan.c:5473 shrink_node_memcgs mm/vmscan.c:5660 [inline] shrink_node+0xf0c/0x2690 mm/vmscan.c:5690 shrink_zones mm/vmscan.c:5896 [inline] do_try_to_free_pages+0x5db/0x1560 mm/vmscan.c:5954 try_to_free_pages+0x4b7/0xb70 mm/vmscan.c:6193 __perform_reclaim mm/page_alloc.c:4705 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:4727 [inline] __alloc_pages_slowpath+0x11aa/0x29a0 mm/page_alloc.c:5143 __alloc_pages_nodemask+0x37c/0x5f0 mm/page_alloc.c:5368 __alloc_pages include/linux/gfp.h:544 [inline] __alloc_pages_node include/linux/gfp.h:557 [inline] alloc_pages_node include/linux/gfp.h:571 [inline] alloc_pages include/linux/gfp.h:590 [inline] __get_free_pages mm/page_alloc.c:5392 [inline] get_zeroed_page+0x19/0x40 mm/page_alloc.c:5401 pud_alloc_one include/asm-generic/pgalloc.h:166 [inline] __pud_alloc+0x37/0x1a0 mm/memory.c:5410 pud_alloc include/linux/mm.h:2297 [inline] copy_pud_range mm/memory.c:1112 [inline] copy_p4d_range mm/memory.c:1156 [inline] copy_page_range+0x25b0/0x2870 mm/memory.c:1229 dup_mmap kernel/fork.c:620 [inline] dup_mm kernel/fork.c:1435 [inline] copy_mm+0xc63/0x1480 kernel/fork.c:1491 copy_process+0x1184/0x3310 kernel/fork.c:2183 kernel_clone+0x23f/0x940 kernel/fork.c:2574 __do_sys_clone kernel/fork.c:2700 [inline] __se_sys_clone kernel/fork.c:2684 [inline] __x64_sys_clone+0x176/0x1d0 kernel/fork.c:2684 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f3992918a12 Code: 41 5d 41 5e 41 5f c3 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 10 48 8b 15 e7 43 0f 00 f7 d8 64 89 02 48 83 RSP: 002b:00007ffeb40e9f88 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 000055daca6c9c01 RCX: 00007f3992918a12 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 0000000000000000 R08: 0000000000000000 R09: 000055daca6992c0 R10: 00007f3992807f50 R11: 0000000000000246 R12: 000055daca6b4fd0 R13: 0000000000000000 R14: 0000000000000000 R15: 000055daca6992c0 Allocated by task 13566: 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:430 [inline] ____kasan_kmalloc mm/kasan/common.c:509 [inline] __kasan_kmalloc+0xda/0x110 mm/kasan/common.c:518 kasan_kmalloc include/linux/kasan.h:254 [inline] __kmalloc+0x1a7/0x330 mm/slub.c:4033 kmalloc include/linux/slab.h:557 [inline] kzalloc include/linux/slab.h:664 [inline] __register_sysctl_table+0xeb/0x1250 fs/proc/proc_sysctl.c:1319 register_net_sysctl+0x2c/0x40 net/sysctl_net.c:121 __devinet_sysctl_register+0x2c4/0x390 net/ipv4/devinet.c:2599 devinet_sysctl_register+0x169/0x1e0 net/ipv4/devinet.c:2639 inetdev_init+0x273/0x480 net/ipv4/devinet.c:277 inetdev_event+0x1f8/0x1030 net/ipv4/devinet.c:1545 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x90/0x100 kernel/notifier.c:410 call_netdevice_notifiers_info net/core/dev.c:2054 [inline] call_netdevice_notifiers_extack net/core/dev.c:2066 [inline] call_netdevice_notifiers+0x111/0x190 net/core/dev.c:2080 register_netdevice+0x1043/0x13c0 net/core/dev.c:10086 __ip_tunnel_create+0x2bf/0x380 net/ipv4/ip_tunnel.c:267 ip_tunnel_init_net+0x290/0x740 net/ipv4/ip_tunnel.c:1083 vti_init_net+0x2f/0x140 net/ipv4/ip_vti.c:501 ops_init+0x1ba/0x4a0 net/core/net_namespace.c:144 setup_net+0x36d/0xb50 net/core/net_namespace.c:345 copy_net_ns+0x314/0x520 net/core/net_namespace.c:486 create_new_namespaces+0x3a2/0x650 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x120/0x170 kernel/nsproxy.c:231 ksys_unshare+0x4ac/0x7d0 kernel/fork.c:3080 __do_sys_unshare kernel/fork.c:3148 [inline] __se_sys_unshare kernel/fork.c:3146 [inline] __x64_sys_unshare+0x38/0x40 kernel/fork.c:3146 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb 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 kvfree_call_rcu+0x10c/0x620 kernel/rcu/tree.c:3535 drop_sysctl_table+0x2ef/0x410 fs/proc/proc_sysctl.c:1680 unregister_sysctl_table+0x75/0x120 fs/proc/proc_sysctl.c:1718 unregister_net_sysctl_table+0x15/0x20 net/sysctl_net.c:127 __devinet_sysctl_unregister net/ipv4/devinet.c:2622 [inline] devinet_sysctl_unregister net/ipv4/devinet.c:2650 [inline] inetdev_destroy net/ipv4/devinet.c:326 [inline] inetdev_event+0x79d/0x1030 net/ipv4/devinet.c:1613 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x90/0x100 kernel/notifier.c:410 call_netdevice_notifiers_info net/core/dev.c:2054 [inline] call_netdevice_notifiers_extack net/core/dev.c:2066 [inline] call_netdevice_notifiers net/core/dev.c:2080 [inline] unregister_netdevice_many+0xf8b/0x1980 net/core/dev.c:10766 vti6_exit_batch_net+0x26a/0x2b0 net/ipv6/ip6_vti.c:1186 ops_exit_list net/core/net_namespace.c:190 [inline] cleanup_net+0x5fb/0xb70 net/core/net_namespace.c:609 process_one_work+0x6e1/0xba0 kernel/workqueue.c:2301 worker_thread+0xa6a/0x13b0 kernel/workqueue.c:2447 kthread+0x346/0x3d0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 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 kvfree_call_rcu+0x10c/0x620 kernel/rcu/tree.c:3535 drop_sysctl_table+0x2ef/0x410 fs/proc/proc_sysctl.c:1680 unregister_sysctl_table+0x75/0x120 fs/proc/proc_sysctl.c:1718 unregister_net_sysctl_table+0x15/0x20 net/sysctl_net.c:127 __devinet_sysctl_unregister net/ipv4/devinet.c:2622 [inline] devinet_sysctl_unregister net/ipv4/devinet.c:2650 [inline] inetdev_destroy net/ipv4/devinet.c:326 [inline] inetdev_event+0x79d/0x1030 net/ipv4/devinet.c:1613 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x90/0x100 kernel/notifier.c:410 call_netdevice_notifiers_info net/core/dev.c:2054 [inline] call_netdevice_notifiers_extack net/core/dev.c:2066 [inline] call_netdevice_notifiers net/core/dev.c:2080 [inline] unregister_netdevice_many+0xf8b/0x1980 net/core/dev.c:10766 ip_tunnel_delete_nets+0x343/0x390 net/ipv4/ip_tunnel.c:1136 vti_exit_batch_net+0x22/0x30 net/ipv4/ip_vti.c:512 ops_exit_list net/core/net_namespace.c:190 [inline] cleanup_net+0x5fb/0xb70 net/core/net_namespace.c:609 process_one_work+0x6e1/0xba0 kernel/workqueue.c:2301 worker_thread+0xa6a/0x13b0 kernel/workqueue.c:2447 kthread+0x346/0x3d0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 The buggy address belongs to the object at ffff888105d88000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1136 bytes inside of 2048-byte region [ffff888105d88000, ffff888105d88800) The buggy address belongs to the page: page:ffffea0004176200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105d88 head:ffffea0004176200 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head) raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100042d80 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 1, ts 1121459439, free_ts 0 set_page_owner include/linux/page_owner.h:35 [inline] post_alloc_hook mm/page_alloc.c:2456 [inline] prep_new_page+0x179/0x180 mm/page_alloc.c:2462 get_page_from_freelist+0x2235/0x23d0 mm/page_alloc.c:4254 __alloc_pages_nodemask+0x268/0x5f0 mm/page_alloc.c:5349 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1808 [inline] new_slab+0x84/0x3f0 mm/slub.c:1869 new_slab_objects mm/slub.c:2627 [inline] ___slab_alloc+0x2a6/0x450 mm/slub.c:2791 __slab_alloc+0x63/0xa0 mm/slub.c:2831 slab_alloc_node mm/slub.c:2913 [inline] slab_alloc mm/slub.c:2955 [inline] kmem_cache_alloc_trace+0x1b3/0x2e0 mm/slub.c:2972 kmalloc include/linux/slab.h:552 [inline] kzalloc include/linux/slab.h:664 [inline] acpi_os_allocate_zeroed include/acpi/platform/aclinuxex.h:57 [inline] acpi_ds_create_walk_state+0xd6/0x270 drivers/acpi/acpica/dswstate.c:518 acpi_ds_call_control_method+0x135/0x760 drivers/acpi/acpica/dsmethod.c:498 acpi_ps_parse_aml+0x303/0x9a0 drivers/acpi/acpica/psparse.c:503 acpi_ps_execute_method+0x7a3/0x900 drivers/acpi/acpica/psxface.c:190 acpi_ns_evaluate+0x629/0xa00 drivers/acpi/acpica/nseval.c:205 acpi_evaluate_object+0x53c/0xa00 drivers/acpi/acpica/nsxfeval.c:354 acpi_evaluate_integer+0xf5/0x1c0 drivers/acpi/utils.c:279 acpi_bus_get_status_handle+0x26/0x80 drivers/acpi/bus.c:83 acpi_bus_type_and_status drivers/acpi/scan.c:1757 [inline] acpi_bus_check_add+0x2a3/0xb30 drivers/acpi/scan.c:1911 page_owner free stack trace missing Memory state around the buggy address: ffff888105d88300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888105d88380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888105d88400: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc ^ ffff888105d88480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888105d88500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================