==================================================================
BUG: KASAN: use-after-free in __queue_work+0x10e/0xed0 kernel/workqueue.c:1454
Read of size 4 at addr ffffaf800e64d9c0 by task syz-executor.1/2061

CPU: 1 PID: 2061 Comm: syz-executor.1 Not tainted 5.17.0-rc1-syzkaller-00002-g0966d385830d #0
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff8000a228>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:113
[<ffffffff831668cc>] show_stack+0x34/0x40 arch/riscv/kernel/stacktrace.c:119
[<ffffffff831756ba>] __dump_stack lib/dump_stack.c:88 [inline]
[<ffffffff831756ba>] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:106
[<ffffffff8047479e>] print_address_description.constprop.0+0x2a/0x330 mm/kasan/report.c:255
[<ffffffff80474d4c>] __kasan_report mm/kasan/report.c:442 [inline]
[<ffffffff80474d4c>] kasan_report+0x184/0x1e0 mm/kasan/report.c:459
[<ffffffff804759f4>] check_region_inline mm/kasan/generic.c:183 [inline]
[<ffffffff804759f4>] __asan_load4+0x6e/0x96 mm/kasan/generic.c:255
[<ffffffff80092370>] __queue_work+0x10e/0xed0 kernel/workqueue.c:1454
[<ffffffff8009321a>] queue_work_on+0xe8/0xfe kernel/workqueue.c:1562
[<ffffffff830cfbca>] queue_work include/linux/workqueue.h:502 [inline]
[<ffffffff830cfbca>] nci_cmd_timer+0x52/0x5e net/nfc/nci/core.c:611
[<ffffffff8016988e>] call_timer_fn+0x164/0x698 kernel/time/timer.c:1421
[<ffffffff8016a246>] expire_timers kernel/time/timer.c:1466 [inline]
[<ffffffff8016a246>] __run_timers.part.0+0x484/0x4e6 kernel/time/timer.c:1734
[<ffffffff8016a32e>] __run_timers kernel/time/timer.c:1715 [inline]
[<ffffffff8016a32e>] run_timer_softirq+0x86/0x100 kernel/time/timer.c:1747
[<ffffffff831b082c>] __do_softirq+0x274/0x8fc kernel/softirq.c:558
[<ffffffff80061288>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
[<ffffffff80061288>] invoke_softirq kernel/softirq.c:439 [inline]
[<ffffffff80061288>] __irq_exit_rcu+0x142/0x1f8 kernel/softirq.c:637
[<ffffffff80061596>] irq_exit+0x10/0x7a kernel/softirq.c:661
[<ffffffff831a1a2c>] generic_handle_arch_irq+0x48/0x54 kernel/irq/handle.c:240
[<ffffffff80005724>] ret_from_exception+0x0/0x10
[<ffffffff831afd54>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
[<ffffffff831afd54>] _raw_spin_unlock_irqrestore+0x68/0x98 kernel/locking/spinlock.c:194

Allocated by task 12905:
 stack_trace_save+0xa6/0xd8 kernel/stacktrace.c:122
 kasan_save_stack+0x2c/0x58 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:436 [inline]
 ____kasan_kmalloc mm/kasan/common.c:515 [inline]
 ____kasan_kmalloc mm/kasan/common.c:474 [inline]
 __kasan_kmalloc+0x80/0xb2 mm/kasan/common.c:524
 kasan_kmalloc include/linux/kasan.h:270 [inline]
 __kmalloc+0x190/0x318 mm/slub.c:4424
 kmalloc include/linux/slab.h:586 [inline]
 kzalloc.constprop.0+0x24/0x2e include/linux/slab.h:715
 alloc_workqueue+0x146/0x92e kernel/workqueue.c:4325
 nci_register_device+0x198/0x612 net/nfc/nci/core.c:1220
 virtual_ncidev_open+0x82/0x12c drivers/nfc/virtual_ncidev.c:143
 misc_open+0x272/0x2c8 drivers/char/misc.c:141
 chrdev_open+0x1d4/0x478 fs/char_dev.c:414
 do_dentry_open+0x2a4/0x7d4 fs/open.c:824
 vfs_open+0x52/0x5e fs/open.c:959
 do_open fs/namei.c:3476 [inline]
 path_openat+0x12b6/0x189e fs/namei.c:3609
 do_filp_open+0x10e/0x22a fs/namei.c:3636
 do_sys_openat2+0x174/0x31e fs/open.c:1214
 do_sys_open fs/open.c:1230 [inline]
 __do_sys_openat fs/open.c:1246 [inline]
 sys_openat+0xdc/0x164 fs/open.c:1241
 ret_from_syscall+0x0/0x2

Freed by task 11443:
 stack_trace_save+0xa6/0xd8 kernel/stacktrace.c:122
 kasan_save_stack+0x2c/0x58 mm/kasan/common.c:38
 kasan_set_track+0x1a/0x26 mm/kasan/common.c:45
 kasan_set_free_info+0x1e/0x3a mm/kasan/generic.c:370
 ____kasan_slab_free mm/kasan/common.c:366 [inline]
 ____kasan_slab_free+0x15e/0x180 mm/kasan/common.c:328
 __kasan_slab_free+0x10/0x18 mm/kasan/common.c:374
 kasan_slab_free include/linux/kasan.h:236 [inline]
 slab_free_hook mm/slub.c:1728 [inline]
 slab_free_freelist_hook+0x8e/0x1cc mm/slub.c:1754
 slab_free mm/slub.c:3509 [inline]
 kfree+0xe0/0x3e4 mm/slub.c:4562
 rcu_free_wq+0xb0/0xde kernel/workqueue.c:3542
 rcu_do_batch kernel/rcu/tree.c:2527 [inline]
 rcu_core+0x63c/0xf36 kernel/rcu/tree.c:2778
 rcu_core_si+0xc/0x14 kernel/rcu/tree.c:2795
 __do_softirq+0x274/0x8fc kernel/softirq.c:558

Last potentially related work creation:
 stack_trace_save+0xa6/0xd8 kernel/stacktrace.c:122
 kasan_save_stack+0x2c/0x58 mm/kasan/common.c:38
 __kasan_record_aux_stack+0xc4/0xdc mm/kasan/generic.c:348
 kasan_record_aux_stack_noalloc+0xe/0x16 mm/kasan/generic.c:358
 __call_rcu kernel/rcu/tree.c:3026 [inline]
 call_rcu+0x8c/0x4ce kernel/rcu/tree.c:3106
 pwq_unbound_release_workfn+0x1a8/0x1f8 kernel/workqueue.c:3747
 process_one_work+0x654/0xffe kernel/workqueue.c:2307
 worker_thread+0x360/0x8fa kernel/workqueue.c:2454
 kthread+0x19e/0x1fa kernel/kthread.c:377
 ret_from_exception+0x0/0x10

Second to last potentially related work creation:
 stack_trace_save+0xa6/0xd8 kernel/stacktrace.c:122
 kasan_save_stack+0x2c/0x58 mm/kasan/common.c:38
 __kasan_record_aux_stack+0xc4/0xdc mm/kasan/generic.c:348
 kasan_record_aux_stack_noalloc+0xe/0x16 mm/kasan/generic.c:358
 kvfree_call_rcu+0x8e/0x440 kernel/rcu/tree.c:3591
 neigh_destroy+0x324/0x492 net/core/neighbour.c:888
 neigh_release include/net/neighbour.h:451 [inline]
 neigh_cleanup_and_release net/core/neighbour.c:103 [inline]
 neigh_periodic_work+0x688/0x7c2 net/core/neighbour.c:970
 process_one_work+0x654/0xffe kernel/workqueue.c:2307
 worker_thread+0x360/0x8fa kernel/workqueue.c:2454
 kthread+0x19e/0x1fa kernel/kthread.c:377
 ret_from_exception+0x0/0x10

The buggy address belongs to the object at ffffaf800e64d800
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 448 bytes inside of
 1024-byte region [ffffaf800e64d800, ffffaf800e64dc00)
The buggy address belongs to the page:
page:ffffaf807aa55440 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8e848
head:ffffaf807aa55440 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x8800010200(slab|head|section=17|node=0|zone=0)
raw: 0000008800010200 0000000000000100 0000000000000122 ffffaf8007201dc0
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
raw: 00000000000007ff
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 2063, ts 1476148893000, free_ts 1473846031900
 __set_page_owner+0x48/0x136 mm/page_owner.c:183
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0xd0/0x10a mm/page_alloc.c:2427
 prep_new_page mm/page_alloc.c:2434 [inline]
 get_page_from_freelist+0x8da/0x12d8 mm/page_alloc.c:4165
 __alloc_pages+0x150/0x3b6 mm/page_alloc.c:5389
 alloc_pages+0x132/0x2a6 mm/mempolicy.c:2271
 alloc_slab_page.constprop.0+0xc2/0xfa mm/slub.c:1799
 allocate_slab mm/slub.c:1944 [inline]
 new_slab+0x25a/0x2cc mm/slub.c:2004
 ___slab_alloc+0x56e/0x918 mm/slub.c:3018
 __slab_alloc.constprop.0+0x50/0x8c mm/slub.c:3105
 slab_alloc_node mm/slub.c:3196 [inline]
 __kmalloc_node_track_caller+0x26c/0x362 mm/slub.c:4957
 kmalloc_reserve net/core/skbuff.c:354 [inline]
 __alloc_skb+0xee/0x2e4 net/core/skbuff.c:426
 alloc_skb include/linux/skbuff.h:1158 [inline]
 nlmsg_new include/net/netlink.h:953 [inline]
 rtmsg_fib+0x108/0x2be net/ipv4/fib_semantics.c:518
 fib_table_insert+0x52a/0xebe net/ipv4/fib_trie.c:1389
 fib_magic+0x3f4/0x438 net/ipv4/fib_frontend.c:1087
 fib_add_ifaddr+0x2be/0x2e2 net/ipv4/fib_frontend.c:1129
 fib_netdev_event+0x362/0x4b0 net/ipv4/fib_frontend.c:1466
page last free stack trace:
 __reset_page_owner+0x4a/0xea mm/page_owner.c:142
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1352 [inline]
 free_pcp_prepare+0x29c/0x45e mm/page_alloc.c:1404
 free_unref_page_prepare mm/page_alloc.c:3325 [inline]
 free_unref_page+0x6a/0x31e mm/page_alloc.c:3404
 free_the_page mm/page_alloc.c:706 [inline]
 __free_pages+0xe2/0x112 mm/page_alloc.c:5474
 __free_slab+0x122/0x27c mm/slub.c:2028
 free_slab mm/slub.c:2043 [inline]
 discard_slab+0x4c/0x7a mm/slub.c:2049
 __unfreeze_partials+0x16a/0x18e mm/slub.c:2536
 put_cpu_partial+0xf6/0x162 mm/slub.c:2612
 __slab_free+0x166/0x29c mm/slub.c:3378
 do_slab_free mm/slub.c:3497 [inline]
 ___cache_free+0x17c/0x354 mm/slub.c:3516
 qlink_free mm/kasan/quarantine.c:157 [inline]
 qlist_free_all+0x7c/0x132 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x14c/0x1c8 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x5c/0x98 mm/kasan/common.c:446
 kasan_slab_alloc include/linux/kasan.h:260 [inline]
 slab_post_alloc_hook mm/slab.h:732 [inline]
 slab_alloc_node mm/slub.c:3230 [inline]
 kmem_cache_alloc_node+0x368/0x41c mm/slub.c:3266
 __alloc_skb+0x234/0x2e4 net/core/skbuff.c:414
 alloc_skb include/linux/skbuff.h:1158 [inline]
 nlmsg_new include/net/netlink.h:953 [inline]
 rtmsg_ifinfo_build_skb+0x62/0x142 net/core/rtnetlink.c:3829

Memory state around the buggy address:
 ffffaf800e64d880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffffaf800e64d900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffffaf800e64d980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                           ^
 ffffaf800e64da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffffaf800e64da80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
Oops [#1]
Modules linked in:
CPU: 1 PID: 2061 Comm: syz-executor.1 Tainted: G    B             5.17.0-rc1-syzkaller-00002-g0966d385830d #0
Hardware name: riscv-virtio,qemu (DT)
epc : __queue_work+0x242/0xed0 kernel/workqueue.c:1476
 ra : __queue_work+0x242/0xed0 kernel/workqueue.c:1476
epc : ffffffff800924a4 ra : ffffffff800924a4 sp : ffffaf800f6eb500
 gp : ffffffff85863ac0 tp : ffffaf800ba5e100 t0 : ffffffff86bcb657
 t1 : fffff5ef01d4a81f t2 : 0000000000000000 s0 : ffffaf800f6eb590
 s1 : ffffaf805a9f1840 a0 : 0000000000000000 a1 : 0000000000000008
 a2 : 0000000000000000 a3 : ffffffff800924a4 a4 : ffffffff85892ec8
 a5 : 0000000000000001 a6 : 0000000000f00000 a7 : ffffaf800ea540ff
 s2 : 0000000000000000 s3 : ffffaf800ea540f8 s4 : ffffaf800e64d800
 s5 : ffffaf8007229800 s6 : 0000000000000001 s7 : 0000000000000008
 s8 : ffffffff83449840 s9 : ffffffff86c1a620 s10: ffffaf800e64d9c0
 s11: 0000000000000000 t3 : 0000000061736944 t4 : fffff5ef01d4a81f
 t5 : fffff5ef01d4a820 t6 : ffffaf800f6eaf38
status: 0000000000000100 badaddr: 0000000000000000 cause: 000000000000000d
[<ffffffff8009321a>] queue_work_on+0xe8/0xfe kernel/workqueue.c:1562
[<ffffffff830cfbca>] queue_work include/linux/workqueue.h:502 [inline]
[<ffffffff830cfbca>] nci_cmd_timer+0x52/0x5e net/nfc/nci/core.c:611
[<ffffffff8016988e>] call_timer_fn+0x164/0x698 kernel/time/timer.c:1421
[<ffffffff8016a246>] expire_timers kernel/time/timer.c:1466 [inline]
[<ffffffff8016a246>] __run_timers.part.0+0x484/0x4e6 kernel/time/timer.c:1734
[<ffffffff8016a32e>] __run_timers kernel/time/timer.c:1715 [inline]
[<ffffffff8016a32e>] run_timer_softirq+0x86/0x100 kernel/time/timer.c:1747
[<ffffffff831b082c>] __do_softirq+0x274/0x8fc kernel/softirq.c:558
[<ffffffff80061288>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
[<ffffffff80061288>] invoke_softirq kernel/softirq.c:439 [inline]
[<ffffffff80061288>] __irq_exit_rcu+0x142/0x1f8 kernel/softirq.c:637
[<ffffffff80061596>] irq_exit+0x10/0x7a kernel/softirq.c:661
[<ffffffff831a1a2c>] generic_handle_arch_irq+0x48/0x54 kernel/irq/handle.c:240
[<ffffffff80005724>] ret_from_exception+0x0/0x10
[<ffffffff831afd54>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
[<ffffffff831afd54>] _raw_spin_unlock_irqrestore+0x68/0x98 kernel/locking/spinlock.c:194
---[ end trace 0000000000000000 ]---