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BUG: KASAN: slab-out-of-bounds in hiddev_ioctl_usage.isra.0+0x12ee/0x1420 drivers/hid/usbhid/hiddev.c:538
Read of size 4 at addr ffff8881c4b481dc by task syz-executor.0/2766

CPU: 1 PID: 2766 Comm: syz-executor.0 Not tainted 5.3.0+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xca/0x13e lib/dump_stack.c:113
 print_address_description.constprop.0+0x36/0x50 mm/kasan/report.c:374
 __kasan_report.cold+0x1a/0x33 mm/kasan/report.c:506
 kasan_report+0xe/0x12 mm/kasan/common.c:634
 hiddev_ioctl_usage.isra.0+0x12ee/0x1420 drivers/hid/usbhid/hiddev.c:538
 hiddev_ioctl+0x7a1/0x1550 drivers/hid/usbhid/hiddev.c:810
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:509 [inline]
 do_vfs_ioctl+0xd2d/0x1330 fs/ioctl.c:696
 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:713
 __do_sys_ioctl fs/ioctl.c:720 [inline]
 __se_sys_ioctl fs/ioctl.c:718 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:718
 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459a29
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f5b7f94ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459a29
RDX: 0000000020000100 RSI: 00000000c018480b RDI: 0000000000000004
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5b7f94f6d4
R13: 00000000004c247c R14: 00000000004d5af0 R15: 00000000ffffffff

The buggy address belongs to the page:
page:ffffea000712c000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 compound_mapcount: 0
flags: 0x200000000010000(head)
raw: 0200000000010000 dead000000000100 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881c4b48080: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
 ffff8881c4b48100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
>ffff8881c4b48180: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
                                                    ^
 ffff8881c4b48200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
 ffff8881c4b48280: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
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