==================================================================
BUG: KASAN: slab-out-of-bounds in mcp2221_raw_event+0x110d/0x1140 drivers/hid/hid-mcp2221.c:975
Read of size 1 at addr ffff88811c603fff by task udevd/2865

CPU: 0 UID: 0 PID: 2865 Comm: udevd Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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/0x1c0 mm/kasan/report.c:595
 mcp2221_raw_event+0x110d/0x1140 drivers/hid/hid-mcp2221.c:975
 __hid_input_report.constprop.0+0x319/0x470 drivers/hid/hid-core.c:2175
 hid_irq_in+0x55d/0x710 drivers/hid/usbhid/hid-core.c:287
 __usb_hcd_giveback_urb+0x38e/0x610 drivers/usb/core/hcd.c:1657
 usb_hcd_giveback_urb+0x3ca/0x4a0 drivers/usb/core/hcd.c:1741
 dummy_timer+0xdb2/0x3700 drivers/usb/gadget/udc/dummy_hcd.c:2019
 __run_hrtimer kernel/time/hrtimer.c:2067 [inline]
 __hrtimer_run_queues+0x462/0x9c0 kernel/time/hrtimer.c:2124
 hrtimer_run_softirq+0x1ca/0x360 kernel/time/hrtimer.c:2141
 handle_softirqs+0x1d9/0x9b0 kernel/softirq.c:645
 __do_softirq kernel/softirq.c:679 [inline]
 invoke_softirq kernel/softirq.c:519 [inline]
 __irq_exit_rcu+0x168/0x210 kernel/softirq.c:758
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__orc_find+0x41/0xf0 arch/x86/kernel/unwind_orc.c:104
Code: 08 85 d2 0f 84 99 00 00 00 49 89 fe 48 89 f0 49 39 fc 72 7b 48 b9 00 00 00 00 00 fc ff df 49 89 ff 48 89 fd eb 0c 48 8d 6b 04 <49> 89 df 49 39 ec 72 4e 4c 89 e2 48 29 ea 48 89 d6 48 c1 ea 3f 48
RSP: 0018:ffffc900016578a0 EFLAGS: 00000216
RAX: ffffffff8b7896a8 RBX: ffffffff8b21fc24 RCX: dffffc0000000000
RDX: ffffffff81681f38 RSI: 0000000000000000 RDI: ffffffff8b21fc14
RBP: ffffffff8b21fc28 R08: ffffffff8b7896d2 R09: 0000000000000007
R10: 0000000000000200 R11: 000000000000681f R12: ffffffff8b21fc24
R13: ffffffff81681fa2 R14: ffffffff8b21fc14 R15: ffffffff8b21fc20
 orc_find arch/x86/kernel/unwind_orc.c:238 [inline]
 unwind_next_frame+0x2ec/0x2090 arch/x86/kernel/unwind_orc.c:510
 __unwind_start+0x3cd/0x7e0 arch/x86/kernel/unwind_orc.c:787
 unwind_start arch/x86/include/asm/unwind.h:64 [inline]
 arch_stack_walk+0x73/0xf0 arch/x86/kernel/stacktrace.c:24
 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
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __kmalloc_cache_noprof+0x2d8/0x680 mm/slub.c:5563
 _kmalloc_noprof include/linux/slab.h:991 [inline]
 slab_free_hook mm/slub.c:2700 [inline]
 slab_free mm/slub.c:6499 [inline]
 kmem_cache_free+0x3f0/0x650 mm/slub.c:6626
 file_free fs/file_table.c:104 [inline]
 __fput+0x68d/0xb50 fs/file_table.c:525
 fput_close_sync+0x118/0x250 fs/file_table.c:617
 __do_sys_close fs/open.c:1560 [inline]
 __se_sys_close fs/open.c:1545 [inline]
 __x64_sys_close+0x8b/0x120 fs/open.c:1545
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x119/0x710 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb67c8ff407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffc9df05e30 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00007fb67c811880 RCX: 00007fb67c8ff407
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000c
RBP: 00007fb67c8116e8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000000000000000b
R13: 00000000ffffffff R14: ffffffffffffffff R15: 0000000000000000
 </TASK>

Allocated by task 11277:
 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:4683 [inline]
 kmem_cache_alloc_from_sheaf_noprof+0x84/0x180 mm/slub.c:5325
 mas_pop_node lib/maple_tree.c:1062 [inline]
 dst_setup+0x339/0x950 lib/maple_tree.c:2418
 mas_wr_split+0xa70/0x35a0 lib/maple_tree.c:3535
 mas_wr_store_entry+0xcea/0x1d50 lib/maple_tree.c:3612
 mas_store_prealloc+0x6e7/0x10a0 lib/maple_tree.c:5031
 vma_iter_store_new mm/vma.h:711 [inline]
 vma_complete+0x9d8/0xf50 mm/vma.c:403
 __split_vma+0x13d0/0x1db0 mm/vma.c:613
 split_vma mm/vma.c:643 [inline]
 vma_modify+0x1bfd/0x2610 mm/vma.c:1771
 vma_modify_flags+0x25d/0x3e0 mm/vma.c:1799
 mprotect_fixup+0x27a/0xe00 mm/mprotect.c:824
 do_mprotect_pkey+0xa51/0xdd0 mm/mprotect.c:1002
 __do_sys_mprotect mm/mprotect.c:1023 [inline]
 __se_sys_mprotect mm/mprotect.c:1020 [inline]
 __x64_sys_mprotect+0x78/0xc0 mm/mprotect.c:1020
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x119/0x710 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 2979:
 kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
 kasan_save_track+0x14/0x30 mm/kasan/common.c:78
 kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x43/0x70 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2748 [inline]
 __rcu_free_sheaf_prepare+0x5d/0x290 mm/slub.c:3009
 rcu_free_sheaf+0x1a/0xe0 mm/slub.c:6052
 rcu_do_batch kernel/rcu/tree.c:2650 [inline]
 rcu_core+0x5f0/0x1260 kernel/rcu/tree.c:2919
 handle_softirqs+0x1d9/0x9b0 kernel/softirq.c:645
 __do_softirq kernel/softirq.c:679 [inline]
 invoke_softirq kernel/softirq.c:519 [inline]
 __irq_exit_rcu+0x168/0x210 kernel/softirq.c:758
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674

The buggy address belongs to the object at ffff88811c603e00
 which belongs to the cache maple_node of size 256
The buggy address is located 255 bytes to the right of
 allocated 256-byte region [ffff88811c603e00, ffff88811c603f00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11c602
head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x200000000000040(head|node=0|zone=2)
page_type: f5(slab)
raw: 0200000000000040 ffff88810004bc80 dead000000000100 dead000000000122
raw: 0000000000000000 0000000200100010 00000000f5000000 0000000000000000
head: 0200000000000040 ffff88810004bc80 dead000000000100 dead000000000122
head: 0000000000000000 0000000200100010 00000000f5000000 0000000000000000
head: 0200000000000001 ffffffffffffff81 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000002
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5217, tgid 5217 (modprobe), ts 95492755390
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1871
 prep_new_page mm/page_alloc.c:1879 [inline]
 get_page_from_freelist+0xf4b/0x3440 mm/page_alloc.c:3943
 __alloc_frozen_pages_noprof+0x2d7/0x2f70 mm/page_alloc.c:5436
 alloc_slab_page mm/slub.c:3347 [inline]
 allocate_slab mm/slub.c:3462 [inline]
 new_slab+0xa9/0x6e0 mm/slub.c:3513
 refill_objects+0xe3/0x410 mm/slub.c:7410
 refill_sheaf mm/slub.c:2885 [inline]
 __prefill_sheaf_pfmemalloc+0x5f/0xb0 mm/slub.c:5086
 kmem_cache_prefill_sheaf+0x1bd/0x450 mm/slub.c:5174
 mt_get_sheaf lib/maple_tree.c:154 [inline]
 mas_alloc_nodes lib/maple_tree.c:1116 [inline]
 mas_preallocate+0x65a/0xee0 lib/maple_tree.c:5057
 vma_iter_prealloc mm/vma.h:665 [inline]
 __split_vma+0x2f8/0x1db0 mm/vma.c:573
 vms_gather_munmap_vmas+0x3a5/0x1670 mm/vma.c:1528
 __mmap_setup mm/vma.c:2538 [inline]
 __mmap_region+0x4c9/0x3150 mm/vma.c:2861
 mmap_region+0x3db/0x6d0 mm/vma.c:2964
 do_mmap+0x12b6/0x1c10 mm/mmap.c:573
 vm_mmap_pgoff+0x1f0/0x390 mm/util.c:581
 ksys_mmap_pgoff+0x3cb/0x610 mm/mmap.c:619
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
 __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
page last free pid 5205 tgid 5205 ts 95161620166 stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 __free_pages_prepare mm/page_alloc.c:1418 [inline]
 __free_frozen_pages+0x714/0xfc0 mm/page_alloc.c:2962
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x47/0xf0 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x4e/0x70 mm/kasan/common.c:350
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4683 [inline]
 slab_alloc_node mm/slub.c:4996 [inline]
 kmem_cache_alloc_noprof+0x264/0x650 mm/slub.c:5010
 vm_area_dup+0x25/0x7e0 mm/vma_init.c:128
 __split_vma+0x19c/0x1db0 mm/vma.c:560
 vms_gather_munmap_vmas+0x3a5/0x1670 mm/vma.c:1528
 __mmap_setup mm/vma.c:2538 [inline]
 __mmap_region+0x4c9/0x3150 mm/vma.c:2861
 mmap_region+0x3db/0x6d0 mm/vma.c:2964
 do_mmap+0x12b6/0x1c10 mm/mmap.c:573
 vm_mmap_pgoff+0x1f0/0x390 mm/util.c:581
 ksys_mmap_pgoff+0x3cb/0x610 mm/mmap.c:619
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
 __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x119/0x710 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88811c603e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811c603f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88811c603f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                                ^
 ffff88811c604000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88811c604080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
   0:	08 85 d2 0f 84 99    	or     %al,-0x667bf02e(%rbp)
   6:	00 00                	add    %al,(%rax)
   8:	00 49 89             	add    %cl,-0x77(%rcx)
   b:	fe 48 89             	decb   -0x77(%rax)
   e:	f0 49 39 fc          	lock cmp %rdi,%r12
  12:	72 7b                	jb     0x8f
  14:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  1b:	fc ff df
  1e:	49 89 ff             	mov    %rdi,%r15
  21:	48 89 fd             	mov    %rdi,%rbp
  24:	eb 0c                	jmp    0x32
  26:	48 8d 6b 04          	lea    0x4(%rbx),%rbp
* 2a:	49 89 df             	mov    %rbx,%r15 <-- trapping instruction
  2d:	49 39 ec             	cmp    %rbp,%r12
  30:	72 4e                	jb     0x80
  32:	4c 89 e2             	mov    %r12,%rdx
  35:	48 29 ea             	sub    %rbp,%rdx
  38:	48 89 d6             	mov    %rdx,%rsi
  3b:	48 c1 ea 3f          	shr    $0x3f,%rdx
  3f:	48                   	rex.W