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BUG: KASAN: use-after-free in usbhid_power+0xca/0xe0 drivers/hid/usbhid/hid-core.c:1234
Read of size 8 at addr ffff8881d0a84008 by task syz-executor415/1754

CPU: 0 PID: 1754 Comm: syz-executor415 Not tainted 5.3.0-rc5+ #28
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
 usbhid_power+0xca/0xe0 drivers/hid/usbhid/hid-core.c:1234
 hid_hw_power include/linux/hid.h:1038 [inline]
 hidraw_open+0x20d/0x740 drivers/hid/hidraw.c:282
 chrdev_open+0x219/0x5c0 fs/char_dev.c:414
 do_dentry_open+0x494/0x1120 fs/open.c:797
 do_last fs/namei.c:3416 [inline]
 path_openat+0x1430/0x3f50 fs/namei.c:3533
 do_filp_open+0x1a1/0x280 fs/namei.c:3563
 do_sys_open+0x3c0/0x580 fs/open.c:1089
 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4019b0
Code: 01 f0 ff ff 0f 83 c0 0b 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 1d 5d 2d 00 00 75 14 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 94 0b 00 00 c3 48 83 ec 08 e8 fa 00 00 00
RSP: 002b:00007ffcd0a4b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004019b0
RDX: 0000000000000000 RSI: 000000000014d200 RDI: 00007ffcd0a4b030
RBP: 6666666666666667 R08: 000000000000000f R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004029d0
R13: 0000000000402a60 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 337:
 save_stack+0x1b/0x80 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 __kasan_kmalloc mm/kasan/common.c:487 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:460
 slab_post_alloc_hook mm/slab.h:520 [inline]
 slab_alloc_node mm/slub.c:2770 [inline]
 slab_alloc mm/slub.c:2778 [inline]
 kmem_cache_alloc+0xd6/0x2d0 mm/slub.c:2783
 shmem_alloc_inode+0x18/0x40 mm/shmem.c:3630
 alloc_inode+0x61/0x1e0 fs/inode.c:227
 new_inode_pseudo+0x14/0xe0 fs/inode.c:916
 new_inode+0x1b/0x40 fs/inode.c:945
 shmem_get_inode+0x84/0x7e0 mm/shmem.c:2228
 shmem_mknod+0x5a/0x1f0 mm/shmem.c:2864
 lookup_open+0x119a/0x18d0 fs/namei.c:3232
 do_last fs/namei.c:3322 [inline]
 path_openat+0x1045/0x3f50 fs/namei.c:3533
 do_filp_open+0x1a1/0x280 fs/namei.c:3563
 do_sys_open+0x3c0/0x580 fs/open.c:1089
 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 0:
 save_stack+0x1b/0x80 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 __kasan_slab_free+0x130/0x180 mm/kasan/common.c:449
 slab_free_hook mm/slub.c:1423 [inline]
 slab_free_freelist_hook mm/slub.c:1474 [inline]
 slab_free mm/slub.c:3016 [inline]
 kmem_cache_free+0xb9/0x380 mm/slub.c:3032
 i_callback+0x3f/0x70 fs/inode.c:216
 __rcu_reclaim kernel/rcu/rcu.h:222 [inline]
 rcu_do_batch kernel/rcu/tree.c:2114 [inline]
 rcu_core+0x699/0x1bc0 kernel/rcu/tree.c:2314
 __do_softirq+0x221/0x912 kernel/softirq.c:292

The buggy address belongs to the object at ffff8881d0a84000
 which belongs to the cache shmem_inode_cache of size 1168
The buggy address is located 8 bytes inside of
 1168-byte region [ffff8881d0a84000, ffff8881d0a84490)
The buggy address belongs to the page:
page:ffffea000742a100 refcount:1 mapcount:0 mapping:ffff8881da115180 index:0x0 compound_mapcount: 0
flags: 0x200000000010200(slab|head)
raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da115180
raw: 0000000000000000 00000000800c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881d0a83f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
 ffff8881d0a83f80: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
>ffff8881d0a84000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff8881d0a84080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881d0a84100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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