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BUG: KASAN: use-after-free in hidraw_ioctl+0x5e1/0xae0 drivers/hid/hidraw.c:396
Read of size 4 at addr ffff8881d375c018 by task syz-executor762/1778

CPU: 1 PID: 1778 Comm: syz-executor762 Not tainted 5.3.0-rc2+ #25
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+0x6a/0x32c mm/kasan/report.c:351
 __kasan_report.cold+0x1a/0x33 mm/kasan/report.c:482
 kasan_report+0xe/0x12 mm/kasan/common.c:612
 hidraw_ioctl+0x5e1/0xae0 drivers/hid/hidraw.c:396
 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:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x44c439
Code: e8 ec e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 5b cb fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f189cd55ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000006ddc58 RCX: 000000000044c439
RDX: 0000000020000940 RSI: 0000000090044802 RDI: 0000000000000004
RBP: 00000000006ddc50 R08: 0000000000000000 R09: 0000000000000000
R10: 00007f189cd56700 R11: 0000000000000246 R12: 00000000006ddc5c
R13: 00007ffe17975c3f R14: 00007f189cd569c0 R15: 0000000000000005

The buggy address belongs to the page:
page:ffffea00074dd700 refcount:0 mapcount:-128 mapping:0000000000000000 index:0x0
flags: 0x200000000000000()
raw: 0200000000000000 ffffea0007464f08 ffff88821fffabd0 0000000000000000
raw: 0000000000000000 0000000000000002 00000000ffffff7f 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881d375bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881d375bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881d375c000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                            ^
 ffff8881d375c080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881d375c100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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