syzbot

team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
==================================================================
BUG: KASAN: slab-use-after-free in lockdep_unregister_key+0x3d8/0x460 kernel/locking/lockdep.c:6395
Read of size 8 at addr ffff888050146360 by task kworker/u4:21/6791

CPU: 0 PID: 6791 Comm: kworker/u4:21 Not tainted 6.3.0-rc4-next-20230328-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351
 print_report mm/kasan/report.c:462 [inline]
 kasan_report+0x11c/0x130 mm/kasan/report.c:572
 lockdep_unregister_key+0x3d8/0x460 kernel/locking/lockdep.c:6395
 unregister_netdevice_many_notify+0xb19/0x1910 net/core/dev.c:10863
 unregister_netdevice_many net/core/dev.c:10899 [inline]
 default_device_exit_batch+0x451/0x5b0 net/core/dev.c:11352
 ops_exit_list+0x125/0x170 net/core/net_namespace.c:175
 cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:614
 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
 kthread+0x33e/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>

Allocated by task 6791:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 ____kasan_kmalloc mm/kasan/common.c:333 [inline]
 __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:196 [inline]
 __do_kmalloc_node mm/slab_common.c:966 [inline]
 __kmalloc_node_track_caller+0x5f/0x1a0 mm/slab_common.c:986
 kmalloc_reserve+0xf0/0x270 net/core/skbuff.c:535
 __alloc_skb+0x129/0x330 net/core/skbuff.c:604
 alloc_skb include/linux/skbuff.h:1275 [inline]
 nlmsg_new include/net/netlink.h:1003 [inline]
 inet6_rt_notify+0xf0/0x2b0 net/ipv6/route.c:6166
 fib6_del_route net/ipv6/ip6_fib.c:1993 [inline]
 fib6_del+0xfbb/0x1670 net/ipv6/ip6_fib.c:2028
 fib6_clean_node+0x39c/0x5c0 net/ipv6/ip6_fib.c:2190
 fib6_walk_continue+0x487/0x8e0 net/ipv6/ip6_fib.c:2112
 fib6_walk+0x182/0x370 net/ipv6/ip6_fib.c:2160
 fib6_clean_tree+0xdb/0x120 net/ipv6/ip6_fib.c:2240
 __fib6_clean_all+0x107/0x2e0 net/ipv6/ip6_fib.c:2256
 rt6_sync_down_dev net/ipv6/route.c:4887 [inline]
 rt6_disable_ip+0x804/0x9e0 net/ipv6/route.c:4892
 addrconf_ifdown.isra.0+0x11a/0x1940 net/ipv6/addrconf.c:3755
 addrconf_notify+0x106/0x19f0 net/ipv6/addrconf.c:3678
 notifier_call_chain+0xb6/0x3c0 kernel/notifier.c:93
 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1937
 call_netdevice_notifiers_extack net/core/dev.c:1975 [inline]
 call_netdevice_notifiers net/core/dev.c:1989 [inline]
 dev_close_many+0x309/0x630 net/core/dev.c:1530
 unregister_netdevice_many_notify+0x414/0x1910 net/core/dev.c:10816
 xfrmi_exit_batch_net+0x2c2/0x3e0 net/xfrm/xfrm_interface_core.c:983
 ops_exit_list+0x125/0x170 net/core/net_namespace.c:175
 cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:614
 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
 kthread+0x33e/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

Freed by task 6791:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521
 ____kasan_slab_free mm/kasan/common.c:236 [inline]
 ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200
 kasan_slab_free include/linux/kasan.h:162 [inline]
 slab_free_hook mm/slub.c:1781 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807
 slab_free mm/slub.c:3787 [inline]
 __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3800
 skb_kfree_head net/core/skbuff.c:856 [inline]
 skb_free_head+0x108/0x1a0 net/core/skbuff.c:868
 skb_release_data+0x57a/0x820 net/core/skbuff.c:897
 skb_release_all net/core/skbuff.c:962 [inline]
 __kfree_skb net/core/skbuff.c:976 [inline]
 consume_skb net/core/skbuff.c:1189 [inline]
 consume_skb+0xd0/0x170 net/core/skbuff.c:1183
 netlink_broadcast+0x360/0xd90 net/netlink/af_netlink.c:1538
 nlmsg_multicast include/net/netlink.h:1083 [inline]
 nlmsg_notify+0x93/0x280 net/netlink/af_netlink.c:2615
 inet6_rt_notify+0x1f4/0x2b0 net/ipv6/route.c:6178
 fib6_del_route net/ipv6/ip6_fib.c:1993 [inline]
 fib6_del+0xfbb/0x1670 net/ipv6/ip6_fib.c:2028
 fib6_clean_node+0x39c/0x5c0 net/ipv6/ip6_fib.c:2190
 fib6_walk_continue+0x487/0x8e0 net/ipv6/ip6_fib.c:2112
 fib6_walk+0x182/0x370 net/ipv6/ip6_fib.c:2160
 fib6_clean_tree+0xdb/0x120 net/ipv6/ip6_fib.c:2240
 __fib6_clean_all+0x107/0x2e0 net/ipv6/ip6_fib.c:2256
 rt6_sync_down_dev net/ipv6/route.c:4887 [inline]
 rt6_disable_ip+0x804/0x9e0 net/ipv6/route.c:4892
 addrconf_ifdown.isra.0+0x11a/0x1940 net/ipv6/addrconf.c:3755
 addrconf_notify+0x106/0x19f0 net/ipv6/addrconf.c:3678
 notifier_call_chain+0xb6/0x3c0 kernel/notifier.c:93
 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1937
 call_netdevice_notifiers_extack net/core/dev.c:1975 [inline]
 call_netdevice_notifiers net/core/dev.c:1989 [inline]
 dev_close_many+0x309/0x630 net/core/dev.c:1530
 unregister_netdevice_many_notify+0x414/0x1910 net/core/dev.c:10816
 xfrmi_exit_batch_net+0x2c2/0x3e0 net/xfrm/xfrm_interface_core.c:983
 ops_exit_list+0x125/0x170 net/core/net_namespace.c:175
 cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:614
 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
 kthread+0x33e/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

Last potentially related work creation:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:491
 __call_rcu_common.constprop.0+0x99/0x790 kernel/rcu/tree.c:2637
 sctp_transport_destroy net/sctp/transport.c:171 [inline]
 sctp_transport_put+0x121/0x180 net/sctp/transport.c:481
 sctp_association_free+0x4d0/0x7d0 net/sctp/associola.c:379
 sctp_cmd_delete_tcb net/sctp/sm_sideeffect.c:944 [inline]
 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1328 [inline]
 sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline]
 sctp_do_sm+0x3324/0x5310 net/sctp/sm_sideeffect.c:1170
 sctp_assoc_bh_rcv+0x38a/0x6c0 net/sctp/associola.c:1051
 sctp_inq_push+0x1d6/0x270 net/sctp/inqueue.c:80
 sctp_backlog_rcv+0x19a/0x5b0 net/sctp/input.c:331
 sk_backlog_rcv include/net/sock.h:1113 [inline]
 __release_sock+0x133/0x3b0 net/core/sock.c:2922
 release_sock+0x58/0x1b0 net/core/sock.c:3489
 sctp_close+0x446/0x940 net/sctp/socket.c:1535
 inet_release+0x132/0x270 net/ipv4/af_inet.c:426
 inet6_release+0x50/0x70 net/ipv6/af_inet6.c:480
 __sock_release+0xcd/0x290 net/socket.c:653
 sock_close+0x1c/0x20 net/socket.c:1395
 __fput+0x27c/0xa90 fs/file_table.c:321
 task_work_run+0x16f/0x270 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297
 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Second to last potentially related work creation:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:491
 __call_rcu_common.constprop.0+0x99/0x790 kernel/rcu/tree.c:2637
 sctp_transport_destroy net/sctp/transport.c:171 [inline]
 sctp_transport_put+0x121/0x180 net/sctp/transport.c:481
 sctp_association_free+0x4d0/0x7d0 net/sctp/associola.c:379
 sctp_cmd_delete_tcb net/sctp/sm_sideeffect.c:944 [inline]
 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1328 [inline]
 sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline]
 sctp_do_sm+0x3324/0x5310 net/sctp/sm_sideeffect.c:1170
 sctp_assoc_bh_rcv+0x38a/0x6c0 net/sctp/associola.c:1051
 sctp_inq_push+0x1d6/0x270 net/sctp/inqueue.c:80
 sctp_backlog_rcv+0x19a/0x5b0 net/sctp/input.c:331
 sk_backlog_rcv include/net/sock.h:1113 [inline]
 __release_sock+0x133/0x3b0 net/core/sock.c:2922
 release_sock+0x58/0x1b0 net/core/sock.c:3489
 sctp_close+0x446/0x940 net/sctp/socket.c:1535
 inet_release+0x132/0x270 net/ipv4/af_inet.c:426
 inet6_release+0x50/0x70 net/ipv6/af_inet6.c:480
 __sock_release+0xcd/0x290 net/socket.c:653
 sock_close+0x1c/0x20 net/socket.c:1395
 __fput+0x27c/0xa90 fs/file_table.c:321
 task_work_run+0x16f/0x270 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297
 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff888050146000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 864 bytes inside of
 freed 1024-byte region [ffff888050146000, ffff888050146400)

The buggy address belongs to the physical page:
page:ffffea0001405000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x50140
head:ffffea0001405000 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000010200 ffff888012441dc0 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000100010 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 0x152820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 10, tgid 10 (kworker/u4:0), ts 115445985556, free_ts 114153352514
 prep_new_page mm/page_alloc.c:1729 [inline]
 get_page_from_freelist+0xf75/0x2aa0 mm/page_alloc.c:3493
 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4759
 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283
 alloc_slab_page mm/slub.c:1851 [inline]
 allocate_slab+0x28e/0x380 mm/slub.c:1998
 new_slab mm/slub.c:2051 [inline]
 ___slab_alloc+0xa91/0x1400 mm/slub.c:3193
 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292
 __slab_alloc_node mm/slub.c:3345 [inline]
 slab_alloc_node mm/slub.c:3442 [inline]
 __kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3491
 __do_kmalloc_node mm/slab_common.c:965 [inline]
 __kmalloc+0x4e/0x190 mm/slab_common.c:979
 kmalloc include/linux/slab.h:563 [inline]
 kzalloc include/linux/slab.h:680 [inline]
 neigh_alloc net/core/neighbour.c:486 [inline]
 ___neigh_create+0x156f/0x2a40 net/core/neighbour.c:640
 ip6_finish_output2+0xfe9/0x1560 net/ipv6/ip6_output.c:125
 __ip6_finish_output net/ipv6/ip6_output.c:195 [inline]
 ip6_finish_output+0x694/0x1170 net/ipv6/ip6_output.c:206
 NF_HOOK_COND include/linux/netfilter.h:291 [inline]
 ip6_output+0x1f1/0x540 net/ipv6/ip6_output.c:227
 dst_output include/net/dst.h:444 [inline]
 NF_HOOK include/linux/netfilter.h:302 [inline]
 ndisc_send_skb+0xa63/0x1850 net/ipv6/ndisc.c:508
 ndisc_send_rs+0x132/0x6f0 net/ipv6/ndisc.c:718
 addrconf_rs_timer+0x3f1/0x870 net/ipv6/addrconf.c:3936
 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1302 [inline]
 free_unref_page_prepare+0x4d8/0xb80 mm/page_alloc.c:2555
 free_unref_page+0x33/0x370 mm/page_alloc.c:2650
 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2637
 qlink_free mm/kasan/quarantine.c:166 [inline]
 qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185
 kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:292
 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305
 kasan_slab_alloc include/linux/kasan.h:186 [inline]
 slab_post_alloc_hook mm/slab.h:711 [inline]
 slab_alloc_node mm/slub.c:3452 [inline]
 slab_alloc mm/slub.c:3460 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3467 [inline]
 kmem_cache_alloc+0x17c/0x3b0 mm/slub.c:3476
 vm_area_alloc+0x20/0x230 kernel/fork.c:487
 mmap_region+0x407/0x28d0 mm/mmap.c:2585
 do_mmap+0x816/0xf20 mm/mmap.c:1393
 vm_mmap_pgoff+0x1a4/0x3b0 mm/util.c:543
 ksys_mmap_pgoff+0x41f/0x5a0 mm/mmap.c:1439
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffff888050146200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888050146280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888050146300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                       ^
 ffff888050146380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888050146400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================