================================================================== 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+0x99f/0xa80 mm/filemap.c:175 Read of size 4 at addr ffff888113d03470 by task syz.3.16543/29885 CPU: 1 PID: 29885 Comm: syz.3.16543 Tainted: G W 5.10.234-syzkaller-00033-g094fc3778d6b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118 print_address_description+0x81/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:435 [inline] kasan_report+0x179/0x1c0 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+0x99f/0xa80 mm/filemap.c:175 __delete_from_page_cache+0xd0/0x5d0 mm/filemap.c:243 __remove_mapping+0x567/0x690 mm/vmscan.c:985 shrink_page_list+0x1f38/0x4c60 mm/vmscan.c:1498 shrink_inactive_list+0x591/0x1150 mm/vmscan.c:2075 shrink_list mm/vmscan.c:2294 [inline] shrink_lruvec+0xced/0x3860 mm/vmscan.c:5473 shrink_node_memcgs mm/vmscan.c:5660 [inline] shrink_node+0xded/0x2000 mm/vmscan.c:5690 shrink_zones mm/vmscan.c:5896 [inline] do_try_to_free_pages+0x652/0x1630 mm/vmscan.c:5954 try_to_free_mem_cgroup_pages+0x369/0x830 mm/vmscan.c:6272 try_charge+0x4b8/0x15f0 mm/memcontrol.c:2742 __mem_cgroup_charge+0x147/0x6e0 mm/memcontrol.c:6868 mem_cgroup_charge include/linux/memcontrol.h:458 [inline] shmem_add_to_page_cache+0x6a9/0x10c0 mm/shmem.c:699 shmem_getpage_gfp+0xa65/0x2480 mm/shmem.c:1952 shmem_getpage mm/shmem.c:161 [inline] shmem_fallocate+0x9a5/0xe90 mm/shmem.c:2820 vfs_fallocate+0x492/0x570 fs/open.c:310 ksys_fallocate fs/open.c:333 [inline] __do_sys_fallocate fs/open.c:341 [inline] __se_sys_fallocate fs/open.c:339 [inline] __x64_sys_fallocate+0xc0/0x110 fs/open.c:339 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:-1 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fc8b90b2169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc8b771c038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007fc8b92cafa0 RCX: 00007fc8b90b2169 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007fc8b91332a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000008800000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fc8b92cafa0 R15: 00007fff345a5f08 Allocated by task 23257: 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+0xdb/0x110 mm/kasan/common.c:509 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:518 kasan_kmalloc include/linux/kasan.h:254 [inline] __kmalloc+0x1aa/0x330 mm/slub.c:4033 kmalloc include/linux/slab.h:557 [inline] kzalloc include/linux/slab.h:664 [inline] ops_init+0x8e/0x4a0 net/core/net_namespace.c:134 setup_net+0x367/0xbf0 net/core/net_namespace.c:345 copy_net_ns+0x32f/0x520 net/core/net_namespace.c:486 create_new_namespaces+0x410/0x660 kernel/nsproxy.c:110 copy_namespaces+0x1d1/0x220 kernel/nsproxy.c:179 copy_process+0x11a0/0x3340 kernel/fork.c:2186 kernel_clone+0x21e/0x9e0 kernel/fork.c:2574 __do_sys_clone kernel/fork.c:2700 [inline] __se_sys_clone kernel/fork.c:2684 [inline] __x64_sys_clone+0x23f/0x290 kernel/fork.c:2684 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:-1 entry_SYSCALL_64_after_hwframe+0x61/0xcb Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd3/0x100 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 __call_rcu kernel/rcu/tree.c:2976 [inline] call_rcu+0x135/0x11f0 kernel/rcu/tree.c:3050 netlink_release+0x13ad/0x17d0 net/netlink/af_netlink.c:796 __sock_release net/socket.c:597 [inline] sock_close+0xdf/0x270 net/socket.c:1286 __fput+0x33d/0x7b0 fs/file_table.c:281 ____fput+0x15/0x20 fs/file_table.c:314 task_work_run+0x129/0x190 kernel/task_work.c:189 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop+0xbf/0xd0 kernel/entry/common.c:172 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline] syscall_exit_to_user_mode+0xa2/0x1a0 kernel/entry/common.c:274 do_syscall_64+0x40/0x70 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb Second to last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd3/0x100 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 kvfree_call_rcu+0x136/0x650 kernel/rcu/tree.c:3535 drop_sysctl_table+0x311/0x450 fs/proc/proc_sysctl.c:1680 unregister_sysctl_table+0x76/0x120 fs/proc/proc_sysctl.c:1718 unregister_net_sysctl_table+0x15/0x20 net/sysctl_net.c:127 __addrconf_sysctl_unregister net/ipv6/addrconf.c:7065 [inline] addrconf_sysctl_unregister net/ipv6/addrconf.c:7093 [inline] addrconf_ifdown+0x1769/0x1a60 net/ipv6/addrconf.c:3936 addrconf_notify+0x378/0xe90 net/ipv6/addrconf.c:-1 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x8c/0xf0 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+0xde7/0x17d0 net/core/dev.c:10766 default_device_exit_batch+0x38a/0x3f0 net/core/dev.c:11286 ops_exit_list net/core/net_namespace.c:190 [inline] cleanup_net+0x6e9/0xcb0 net/core/net_namespace.c:609 process_one_work+0x6dc/0xbd0 kernel/workqueue.c:2301 worker_thread+0xaea/0x1510 kernel/workqueue.c:2447 kthread+0x34b/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 ffff888113d03000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1136 bytes inside of 2048-byte region [ffff888113d03000, ffff888113d03800) The buggy address belongs to the page: page:ffffea00044f4000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x113d00 head:ffffea00044f4000 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 1673, ts 76038902185, free_ts 76031637199 set_page_owner include/linux/page_owner.h:35 [inline] post_alloc_hook mm/page_alloc.c:2456 [inline] prep_new_page+0x166/0x180 mm/page_alloc.c:2462 get_page_from_freelist+0x2d8c/0x2f30 mm/page_alloc.c:4254 __alloc_pages_nodemask+0x435/0xaf0 mm/page_alloc.c:5348 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1808 [inline] new_slab+0x80/0x400 mm/slub.c:1869 new_slab_objects mm/slub.c:2627 [inline] ___slab_alloc+0x302/0x4b0 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] __kmalloc_track_caller+0x1f8/0x320 mm/slub.c:4536 kmemdup+0x24/0x50 mm/util.c:131 neigh_sysctl_register+0xb0/0x530 net/core/neighbour.c:3648 addrconf_sysctl_register+0xae/0x1a0 net/ipv6/addrconf.c:7079 ipv6_add_dev+0xc11/0x10b0 net/ipv6/addrconf.c:448 addrconf_notify+0x58e/0xe90 net/ipv6/addrconf.c:3567 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x8c/0xf0 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+0x145/0x1b0 net/core/dev.c:2080 register_netdevice+0x1066/0x13f0 net/core/dev.c:10086 veth_newlink+0x667/0xb50 drivers/net/veth.c:1360 page last free stack trace: reset_page_owner include/linux/page_owner.h:28 [inline] free_pages_prepare mm/page_alloc.c:1349 [inline] __free_pages_ok+0x82c/0x850 mm/page_alloc.c:1629 free_the_page+0x76/0x370 mm/page_alloc.c:5409 __free_pages+0x67/0xc0 mm/page_alloc.c:5418 __free_slab+0xcf/0x190 mm/slub.c:1894 free_slab mm/slub.c:1909 [inline] discard_slab mm/slub.c:1915 [inline] unfreeze_partials+0x15e/0x190 mm/slub.c:2410 put_cpu_partial+0xbf/0x180 mm/slub.c:2446 __slab_free+0x2c8/0x3a0 mm/slub.c:3095 do_slab_free mm/slub.c:3191 [inline] ___cache_free+0x111/0x130 mm/slub.c:3210 qlink_free+0x50/0x90 mm/kasan/quarantine.c:157 qlist_free_all+0x47/0xb0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x15a/0x170 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:440 kasan_slab_alloc include/linux/kasan.h:244 [inline] slab_post_alloc_hook+0x61/0x2f0 mm/slab.h:583 slab_alloc_node mm/slub.c:2947 [inline] slab_alloc mm/slub.c:2955 [inline] kmem_cache_alloc+0x168/0x2e0 mm/slub.c:2960 kmem_cache_alloc_node include/linux/slab.h:423 [inline] __alloc_skb+0x80/0x510 net/core/skbuff.c:200 alloc_skb include/linux/skbuff.h:1126 [inline] nlmsg_new include/net/netlink.h:953 [inline] netlink_ack+0x33c/0xb30 net/netlink/af_netlink.c:2420 Memory state around the buggy address: ffff888113d03300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888113d03380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888113d03400: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888113d03480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888113d03500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================