================================================================== BUG: KASAN: use-after-free in usbhid_power+0xca/0xe0 drivers/hid/usbhid/hid-core.c:1234 Read of size 8 at addr ffff8881cea38008 by task syz-executor.1/20197 CPU: 0 PID: 20197 Comm: syz-executor.1 Not tainted 5.3.0-rc7+ #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+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:618 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: 0033:0x4137d1 Code: 75 14 b8 02 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 19 00 00 c3 48 83 ec 08 e8 0a fa ff ff 48 89 04 24 b8 02 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fa ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007fbd7bb127a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00000000004137d1 RDX: 0000000000000000 RSI: 00000000000ab000 RDI: 00007fbd7bb12850 RBP: 000000000075bf20 R08: 000000000000000f R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00007fbd7bb136d4 R13: 00000000004c8cbf R14: 00000000004dfc90 R15: 00000000ffffffff The buggy address belongs to the page: page:ffffea00073a8e00 refcount:0 mapcount:-128 mapping:0000000000000000 index:0x0 flags: 0x200000000000000() raw: 0200000000000000 ffffea0006c0f408 ffffea0007324608 0000000000000000 raw: 0000000000000000 0000000000000002 00000000ffffff7f 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881cea37f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881cea37f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8881cea38000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff8881cea38080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8881cea38100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================