==================================================================
BUG: KASAN: use-after-free in mcp2221_raw_event+0x101c/0x1090 drivers/hid/hid-mcp2221.c:964
Read of size 1 at addr ffff88812fef7fff by task kworker/0:9/10924

CPU: 0 UID: 0 PID: 10924 Comm: kworker/0:9 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: usb_hub_wq hub_event
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x13d/0x4b0 mm/kasan/report.c:482
 kasan_report+0xdf/0x1d0 mm/kasan/report.c:595
 mcp2221_raw_event+0x101c/0x1090 drivers/hid/hid-mcp2221.c:964
 __hid_input_report.constprop.0+0x319/0x470 drivers/hid/hid-core.c:2161
 hid_irq_in+0x55d/0x710 drivers/hid/usbhid/hid-core.c:286
 __usb_hcd_giveback_urb+0x38d/0x610 drivers/usb/core/hcd.c:1657
 usb_hcd_giveback_urb+0x3ca/0x4a0 drivers/usb/core/hcd.c:1741
 dummy_timer+0xda1/0x36c0 drivers/usb/gadget/udc/dummy_hcd.c:2005
 __run_hrtimer kernel/time/hrtimer.c:1930 [inline]
 __hrtimer_run_queues+0x470/0xa00 kernel/time/hrtimer.c:1994
 hrtimer_run_softirq+0x17d/0x2c0 kernel/time/hrtimer.c:2011
 handle_softirqs+0x1dd/0x9e0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x160/0x210 kernel/softirq.c:735
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
 sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1061
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:60 [inline]
RIP: 0010:unwind_next_frame+0x16dd/0x2090 arch/x86/kernel/unwind_orc.c:694
Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 94 07 00 00 49 8b 45 10 48 39 dd 0f 87 f5 f8 ff ff 48 39 d8 0f 86 ec f8 ff ff <48> 8d 53 08 48 39 d5 0f 92 c1 48 39 d0 0f 93 c0 84 c1 0f 84 d4 f8
RSP: 0000:ffffc9001329e3d8 EFLAGS: 00000212
RAX: ffffc900132a0000 RBX: ffffc9001329f9f8 RCX: ffffffff8b4f769c
RDX: 1ffff92002653c8b RSI: ffffc9001329f9c8 RDI: ffffc9001329e458
RBP: ffffc90013298000 R08: 0000000000000001 R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000003ab9 R12: ffffc9001329e498
R13: ffffc9001329e448 R14: ffffc9001329f9f8 R15: ffffc9001329e47c
 arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
 kasan_save_track+0x14/0x30 mm/kasan/common.c:78
 unpoison_slab_object mm/kasan/common.c:340 [inline]
 __kasan_slab_alloc+0x6e/0x70 mm/kasan/common.c:366
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4570 [inline]
 slab_alloc_node mm/slub.c:4899 [inline]
 kmem_cache_alloc_noprof+0x2e7/0x6a0 mm/slub.c:4906
 skb_clone+0x190/0x400 net/core/skbuff.c:2107
 do_one_broadcast net/netlink/af_netlink.c:1455 [inline]
 netlink_broadcast_filtered+0xb22/0xf20 net/netlink/af_netlink.c:1538
 netlink_broadcast+0x39/0x50 net/netlink/af_netlink.c:1562
 uevent_net_broadcast_untagged lib/kobject_uevent.c:331 [inline]
 kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
 kobject_uevent_env+0xcdd/0x18b0 lib/kobject_uevent.c:611
 device_add+0x116e/0x1950 drivers/base/core.c:3672
 i2c_register_adapter+0x39e/0x1210 drivers/i2c/i2c-core-base.c:1572
 i2c_add_adapter drivers/i2c/i2c-core-base.c:1672 [inline]
 i2c_add_adapter+0x10a/0x1a0 drivers/i2c/i2c-core-base.c:1652
 devm_i2c_add_adapter+0x1b/0x90 drivers/i2c/i2c-core-base.c:1844
 mcp2221_probe.cold+0x60e/0xf16 drivers/hid/hid-mcp2221.c:1306
 __hid_device_probe drivers/hid/hid-core.c:2822 [inline]
 hid_device_probe+0x50e/0x800 drivers/hid/hid-core.c:2859
 call_driver_probe drivers/base/dd.c:631 [inline]
 really_probe+0x241/0xa60 drivers/base/dd.c:709
 __driver_probe_device+0x22e/0x480 drivers/base/dd.c:871
 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:901
 __device_attach_driver+0x1df/0x340 drivers/base/dd.c:1029
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1101
 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1156
 bus_probe_device+0x64/0x160 drivers/base/bus.c:613
 device_add+0x1210/0x1950 drivers/base/core.c:3706
 hid_add_device+0x2bf/0x440 drivers/hid/hid-core.c:3003
 usbhid_probe+0xc3c/0x1230 drivers/hid/usbhid/hid-core.c:1449
 usb_probe_interface+0x303/0x8f0 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:631 [inline]
 really_probe+0x241/0xa60 drivers/base/dd.c:709
 __driver_probe_device+0x22e/0x480 drivers/base/dd.c:871
 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:901
 __device_attach_driver+0x1df/0x340 drivers/base/dd.c:1029
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1101
 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1156
 bus_probe_device+0x64/0x160 drivers/base/bus.c:613
 device_add+0x1210/0x1950 drivers/base/core.c:3706
 usb_set_configuration+0xd97/0x1c60 drivers/usb/core/message.c:2268
 usb_generic_driver_probe+0xa1/0xe0 drivers/usb/core/generic.c:250
 usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:631 [inline]
 really_probe+0x241/0xa60 drivers/base/dd.c:709
 __driver_probe_device+0x22e/0x480 drivers/base/dd.c:871
 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:901
 __device_attach_driver+0x1df/0x340 drivers/base/dd.c:1029
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1101
 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1156
 bus_probe_device+0x64/0x160 drivers/base/bus.c:613
 device_add+0x1210/0x1950 drivers/base/core.c:3706
 usb_new_device.cold+0x685/0x115c drivers/usb/core/hub.c:2695
 hub_port_connect drivers/usb/core/hub.c:5567 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
 port_event drivers/usb/core/hub.c:5871 [inline]
 hub_event+0x314d/0x4af0 drivers/usb/core/hub.c:5953
 process_one_work+0xa0e/0x1980 kernel/workqueue.c:3314
 process_scheduled_works kernel/workqueue.c:3397 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3478
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88812fef7c60 pfn:0x12fef7
flags: 0x200000000000000(node=0|zone=2)
raw: 0200000000000000 dead000000000100 dead000000000122 0000000000000000
raw: ffff88812fef7c60 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x440dc0(GFP_KERNEL_ACCOUNT|__GFP_ZERO|__GFP_COMP), pid 2969, tgid 2969 (syz-executor), ts 756974295162, free_ts 760878594799
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1853
 prep_new_page mm/page_alloc.c:1861 [inline]
 get_page_from_freelist+0x20a5/0x3850 mm/page_alloc.c:3941
 __alloc_frozen_pages_noprof+0x273/0x28a0 mm/page_alloc.c:5221
 alloc_pages_mpol+0xe8/0x410 mm/mempolicy.c:2490
 alloc_pages_noprof+0x1a/0x160 mm/mempolicy.c:2581
 pagetable_alloc_noprof include/linux/mm.h:3651 [inline]
 __pte_alloc_one_noprof include/asm-generic/pgalloc.h:76 [inline]
 pte_alloc_one+0x1c/0x3d0 arch/x86/mm/pgtable.c:18
 __pte_alloc+0x6d/0x380 mm/memory.c:453
 copy_pte_range mm/memory.c:1253 [inline]
 copy_pmd_range mm/memory.c:1408 [inline]
 copy_pud_range mm/memory.c:1445 [inline]
 copy_p4d_range mm/memory.c:1469 [inline]
 copy_page_range+0x2d19/0x56a0 mm/memory.c:1555
 dup_mmap+0xcd8/0x1f60 mm/mmap.c:1840
 dup_mm kernel/fork.c:1534 [inline]
 copy_mm kernel/fork.c:1586 [inline]
 copy_process+0x4928/0x7c70 kernel/fork.c:2264
 kernel_clone+0x176/0x9e0 kernel/fork.c:2722
 __do_sys_clone+0xd9/0x120 kernel/fork.c:2863
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0x7f0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 14 tgid 14 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1397 [inline]
 __free_frozen_pages+0x6d8/0xf60 mm/page_alloc.c:2938
 __pagetable_free include/linux/mm.h:3661 [inline]
 pagetable_free include/linux/mm.h:3685 [inline]
 pagetable_dtor_free include/linux/mm.h:3784 [inline]
 __tlb_remove_table include/asm-generic/tlb.h:221 [inline]
 __tlb_remove_table_free mm/mmu_gather.c:228 [inline]
 tlb_remove_table_rcu+0x2cf/0x380 mm/mmu_gather.c:291
 rcu_do_batch kernel/rcu/tree.c:2617 [inline]
 rcu_core+0x5a2/0x10d0 kernel/rcu/tree.c:2869
 handle_softirqs+0x1dd/0x9e0 kernel/softirq.c:622
 run_ksoftirqd kernel/softirq.c:1076 [inline]
 run_ksoftirqd+0x38/0x60 kernel/softirq.c:1068
 smpboot_thread_fn+0x3d3/0xaa0 kernel/smpboot.c:160
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Memory state around the buggy address:
 ffff88812fef7e80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88812fef7f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff88812fef7f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                                                ^
 ffff88812fef8000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88812fef8080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
   0:	fc                   	cld
   1:	ff                   	lcall  (bad)
   2:	df 48 89             	fisttps -0x77(%rax)
   5:	fa                   	cli
   6:	48 c1 ea 03          	shr    $0x3,%rdx
   a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   e:	0f 85 94 07 00 00    	jne    0x7a8
  14:	49 8b 45 10          	mov    0x10(%r13),%rax
  18:	48 39 dd             	cmp    %rbx,%rbp
  1b:	0f 87 f5 f8 ff ff    	ja     0xfffff916
  21:	48 39 d8             	cmp    %rbx,%rax
  24:	0f 86 ec f8 ff ff    	jbe    0xfffff916
* 2a:	48 8d 53 08          	lea    0x8(%rbx),%rdx <-- trapping instruction
  2e:	48 39 d5             	cmp    %rdx,%rbp
  31:	0f 92 c1             	setb   %cl
  34:	48 39 d0             	cmp    %rdx,%rax
  37:	0f 93 c0             	setae  %al
  3a:	84 c1                	test   %al,%cl
  3c:	0f                   	.byte 0xf
  3d:	84 d4                	test   %dl,%ah
  3f:	f8                   	clc