==================================================================
BUG: KASAN: use-after-free in __queue_work+0x28/0x4a0 kernel/workqueue.c:1425
Read at addr f6ff0000263b7f00 by task syz-fuzzer/746
Pointer tag: [f6], memory tag: [fe]

CPU: 1 PID: 746 Comm: syz-fuzzer Not tainted 6.1.0-rc6-syzkaller #0
Hardware name: linux,dummy-virt (DT)
Call trace:
 dump_backtrace.part.0+0xe0/0xf0 arch/arm64/kernel/stacktrace.c:156
 dump_backtrace arch/arm64/kernel/stacktrace.c:162 [inline]
 show_stack+0x18/0x40 arch/arm64/kernel/stacktrace.c:163
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x68/0x84 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:284 [inline]
 print_report+0x1a8/0x4a0 mm/kasan/report.c:395
 kasan_report+0x94/0xb4 mm/kasan/report.c:495
 __do_kernel_fault+0x164/0x1e0 arch/arm64/mm/fault.c:320
 do_bad_area arch/arm64/mm/fault.c:473 [inline]
 do_tag_check_fault+0x78/0x8c arch/arm64/mm/fault.c:749
 do_mem_abort+0x44/0x94 arch/arm64/mm/fault.c:825
 el1_abort+0x40/0x60 arch/arm64/kernel/entry-common.c:367
 el1h_64_sync_handler+0xd8/0xe4 arch/arm64/kernel/entry-common.c:427
 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:576
 __queue_work+0x28/0x4a0 kernel/workqueue.c:1425
 queue_work_on+0x6c/0x90 kernel/workqueue.c:1545
 queue_work include/linux/workqueue.h:503 [inline]
 nci_cmd_timer+0x28/0x34 net/nfc/nci/core.c:615
 call_timer_fn.constprop.0+0x24/0x80 kernel/time/timer.c:1474
 expire_timers+0x98/0xc4 kernel/time/timer.c:1519
 __run_timers kernel/time/timer.c:1790 [inline]
 __run_timers kernel/time/timer.c:1763 [inline]
 run_timer_softirq+0xf4/0x254 kernel/time/timer.c:1803
 _stext+0x124/0x2a4
 ____do_softirq+0x10/0x20 arch/arm64/kernel/irq.c:79
 call_on_irq_stack+0x2c/0x5c arch/arm64/kernel/entry.S:889
 do_softirq_own_stack+0x1c/0x30 arch/arm64/kernel/irq.c:84
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xcc/0xf4 kernel/softirq.c:650
 irq_exit_rcu+0x10/0x20 kernel/softirq.c:662
 el0_interrupt+0x54/0x104 arch/arm64/kernel/entry-common.c:717
 __el0_irq_handler_common+0x18/0x2c arch/arm64/kernel/entry-common.c:724
 el0t_64_irq_handler+0x10/0x20 arch/arm64/kernel/entry-common.c:729
 el0t_64_irq+0x198/0x19c arch/arm64/kernel/entry.S:582

Allocated by task 10794:
 kasan_save_stack+0x2c/0x60 mm/kasan/common.c:45
 save_stack_info+0x38/0x130 mm/kasan/tags.c:104
 kasan_save_alloc_info+0x14/0x20 mm/kasan/tags.c:138
 ____kasan_kmalloc mm/kasan/common.c:371 [inline]
 ____kasan_kmalloc mm/kasan/common.c:330 [inline]
 __kasan_kmalloc+0x9c/0xb0 mm/kasan/common.c:380
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slab_common.c:955 [inline]
 __kmalloc+0x74/0xc4 mm/slab_common.c:968
 kmalloc include/linux/slab.h:558 [inline]
 kzalloc include/linux/slab.h:689 [inline]
 alloc_workqueue+0x2f0/0x4d0 kernel/workqueue.c:4314
 nci_register_device+0x94/0x25c net/nfc/nci/core.c:1224
 virtual_ncidev_open+0x60/0xe0 drivers/nfc/virtual_ncidev.c:146
 misc_open+0x124/0x170 drivers/char/misc.c:143
 chrdev_open+0xc0/0x260 fs/char_dev.c:414
 do_dentry_open+0x13c/0x4d0 fs/open.c:882
 vfs_open+0x2c/0x40 fs/open.c:1013
 do_open fs/namei.c:3557 [inline]
 path_openat+0x568/0xee0 fs/namei.c:3713
 do_filp_open+0x80/0x130 fs/namei.c:3740
 do_sys_openat2+0xb4/0x16c fs/open.c:1310
 do_sys_open fs/open.c:1326 [inline]
 __do_sys_openat fs/open.c:1342 [inline]
 __se_sys_openat fs/open.c:1337 [inline]
 __arm64_sys_openat+0x64/0xb0 fs/open.c:1337
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x48/0x114 arch/arm64/kernel/syscall.c:52
 el0_svc_common.constprop.0+0x44/0xec arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x2c/0xd0 arch/arm64/kernel/syscall.c:206
 el0_svc+0x2c/0xb0 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0xb8/0xc0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:581

Freed by task 746:
 kasan_save_stack+0x2c/0x60 mm/kasan/common.c:45
 save_stack_info+0x38/0x130 mm/kasan/tags.c:104
 kasan_save_free_info+0x18/0x30 mm/kasan/tags.c:143
 ____kasan_slab_free.constprop.0+0x1b8/0x230 mm/kasan/common.c:236
 __kasan_slab_free+0x10/0x1c mm/kasan/common.c:244
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1724 [inline]
 slab_free_freelist_hook+0xbc/0x1fc mm/slub.c:1750
 slab_free mm/slub.c:3661 [inline]
 __kmem_cache_free+0x16c/0x2ec mm/slub.c:3674
 kfree+0x60/0xb0 mm/slab_common.c:1007
 rcu_free_wq+0x30/0x60 kernel/workqueue.c:3531
 rcu_do_batch kernel/rcu/tree.c:2250 [inline]
 rcu_core+0x220/0x5d0 kernel/rcu/tree.c:2510
 rcu_core_si+0x10/0x20 kernel/rcu/tree.c:2527
 _stext+0x124/0x2a4

The buggy address belongs to the object at ffff0000263b7e00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 256 bytes inside of
 512-byte region [ffff0000263b7e00, ffff0000263b8000)

The buggy address belongs to the physical page:
page:000000006b1dbfa8 refcount:1 mapcount:0 mapping:0000000000000000 index:0xf2ff0000263b7e00 pfn:0x663b6
head:000000006b1dbfa8 order:1 compound_mapcount:0 compound_pincount:0
flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0)
raw: 01ffc00000010200 fffffc0000985580 dead000000000002 f3ff000002c01400
raw: f2ff0000263b7e00 0000000080100003 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000263b7d00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
 ffff0000263b7e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
>ffff0000263b7f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
                   ^
 ffff0000263b8000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
 ffff0000263b8100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
==================================================================
------------[ cut here ]------------
WARNING: CPU: 1 PID: 746 at kernel/workqueue.c:1438 current_wq_worker kernel/workqueue_internal.h:68 [inline]
WARNING: CPU: 1 PID: 746 at kernel/workqueue.c:1438 is_chained_work kernel/workqueue.c:1377 [inline]
WARNING: CPU: 1 PID: 746 at kernel/workqueue.c:1438 __queue_work+0x3b8/0x4a0 kernel/workqueue.c:1438
Modules linked in:
CPU: 1 PID: 746 Comm: syz-fuzzer Tainted: G    B              6.1.0-rc6-syzkaller #0
Hardware name: linux,dummy-virt (DT)
pstate: 604000c9 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __queue_work+0x3b8/0x4a0 kernel/workqueue.c:1438
lr : queue_work_on+0x6c/0x90 kernel/workqueue.c:1545
sp : ffff80000800bdd0
x29: ffff80000800bdd0 x28: 0000000000000020 x27: 0000000000000008
x26: f4ff000006f40fc0 x25: ffff80000a2b60c0 x24: ffff80000a2b60c8
x23: dead000000000122 x22: ffff8000097af210 x21: 0000000000000008
x20: f6ff0000263b7e00 x19: f1ff0000269bd8a8 x18: 0000000000000000
x17: ffff80007592d000 x16: ffff80000800c000 x15: 0000000000004000
x14: 000000000000015a x13: 0000000000000001 x12: ffff00007fbcc068
x11: 0000000000000001 x10: 800004008102efc0 x9 : 0000000000000045
x8 : 0000000000020000 x7 : 0000000000000001 x6 : ffff00007fbcc028
x5 : 0000000000000001 x4 : 0000000000000000 x3 : 0000000000000000
x2 : 0000000000000100 x1 : 0000000000000100 x0 : f4ff000006f40fc0
Call trace:
 current_wq_worker kernel/workqueue_internal.h:68 [inline]
 is_chained_work kernel/workqueue.c:1377 [inline]
 __queue_work+0x3b8/0x4a0 kernel/workqueue.c:1438
 queue_work_on+0x6c/0x90 kernel/workqueue.c:1545
 queue_work include/linux/workqueue.h:503 [inline]
 nci_cmd_timer+0x28/0x34 net/nfc/nci/core.c:615
 call_timer_fn.constprop.0+0x24/0x80 kernel/time/timer.c:1474
 expire_timers+0x98/0xc4 kernel/time/timer.c:1519
 __run_timers kernel/time/timer.c:1790 [inline]
 __run_timers kernel/time/timer.c:1763 [inline]
 run_timer_softirq+0xf4/0x254 kernel/time/timer.c:1803
 _stext+0x124/0x2a4
 ____do_softirq+0x10/0x20 arch/arm64/kernel/irq.c:79
 call_on_irq_stack+0x2c/0x5c arch/arm64/kernel/entry.S:889
 do_softirq_own_stack+0x1c/0x30 arch/arm64/kernel/irq.c:84
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xcc/0xf4 kernel/softirq.c:650
 irq_exit_rcu+0x10/0x20 kernel/softirq.c:662
 el0_interrupt+0x54/0x104 arch/arm64/kernel/entry-common.c:717
 __el0_irq_handler_common+0x18/0x2c arch/arm64/kernel/entry-common.c:724
 el0t_64_irq_handler+0x10/0x20 arch/arm64/kernel/entry-common.c:729
 el0t_64_irq+0x198/0x19c arch/arm64/kernel/entry.S:582
---[ end trace 0000000000000000 ]---