syzbot

bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
bond0 (unregistering): Released all slaves
==================================================================
BUG: KASAN: slab-out-of-bounds in lockdep_unregister_key+0x3d8/0x460 kernel/locking/lockdep.c:6395
Read of size 8 at addr ffff88803863bb60 by task kworker/u4:1/12

CPU: 0 PID: 12 Comm: kworker/u4:1 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
 wq_unregister_lockdep kernel/workqueue.c:3615 [inline]
 destroy_workqueue+0x73d/0x8e0 kernel/workqueue.c:4604
 wg_destruct+0x1ef/0x400 drivers/net/wireguard/device.c:255
 netdev_run_todo+0x6bf/0x1100 net/core/dev.c:10353
 default_device_exit_batch+0x456/0x5b0 net/core/dev.c:11353
 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 7374:
 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]
 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:751 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:808 [inline]
 nsim_dev_trap_report_work+0x2b1/0xc80 drivers/net/netdevsim/dev.c:853
 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 7374:
 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
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:824 [inline]
 nsim_dev_trap_report_work+0x87c/0xc80 drivers/net/netdevsim/dev.c:853
 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

The buggy address belongs to the object at ffff88803863a000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 2912 bytes to the right of
 allocated 4096-byte region [ffff88803863a000, ffff88803863b000)

The buggy address belongs to the physical page:
page:ffffea0000e18e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x38638
head:ffffea0000e18e00 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 ffff888012442140 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000040004 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 0x1d2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5137, tgid 5137 (kworker/1:3), ts 648507302991, free_ts 648447537834
 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_node_track_caller+0x4f/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]
 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:751 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:808 [inline]
 nsim_dev_trap_report_work+0x2b1/0xc80 drivers/net/netdevsim/dev.c:853
 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
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]
 __kmem_cache_alloc_node+0x17c/0x320 mm/slub.c:3491
 kmalloc_trace+0x26/0xe0 mm/slab_common.c:1057
 kmalloc include/linux/slab.h:559 [inline]
 kzalloc include/linux/slab.h:680 [inline]
 ref_tracker_alloc+0x158/0x580 lib/ref_tracker.c:85
 __netns_tracker_alloc include/net/net_namespace.h:331 [inline]
 netlink_release+0xcc6/0x1e40 net/netlink/af_netlink.c:825
 __sock_release net/socket.c:653 [inline]
 sock_release+0x8b/0x1d0 net/socket.c:681
 netlink_kernel_release+0x4f/0x60 net/netlink/af_netlink.c:2126
 nl_fib_lookup_exit net/ipv4/fib_frontend.c:1418 [inline]
 fib_net_exit+0x40/0x80 net/ipv4/fib_frontend.c:1631
 ops_exit_list+0xb0/0x170 net/core/net_namespace.c:170
 setup_net+0x7fb/0xc50 net/core/net_namespace.c:362
 copy_net_ns+0x4ee/0x8e0 net/core/net_namespace.c:491

Memory state around the buggy address:
 ffff88803863ba00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88803863ba80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88803863bb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                       ^
 ffff88803863bb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88803863bc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================