================================================================== BUG: KASAN: use-after-free in clear_bit include/asm-generic/bitops-instrumented.h:56 [inline] BUG: KASAN: use-after-free in usbhid_open+0x263/0x390 drivers/hid/usbhid/hid-core.c:727 Write of size 8 at addr ffff8881c89228c0 by task syz-executor.1/10380 CPU: 0 PID: 10380 Comm: syz-executor.1 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 check_memory_region_inline mm/kasan/generic.c:185 [inline] check_memory_region+0x128/0x190 mm/kasan/generic.c:192 clear_bit include/asm-generic/bitops-instrumented.h:56 [inline] usbhid_open+0x263/0x390 drivers/hid/usbhid/hid-core.c:727 hid_hw_open+0xd2/0x160 drivers/hid/hid-core.c:2023 hidraw_open+0x256/0x740 drivers/hid/hidraw.c:288 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: 0033:0x413761 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:00007f50d4f077a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000413761 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f50d4f07850 RBP: 000000000075bf20 R08: 000000000000000f R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00007f50d4f086d4 R13: 00000000004c8c86 R14: 00000000004dfc10 R15: 00000000ffffffff The buggy address belongs to the page: page:ffffea0007224880 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 flags: 0x200000000000000() raw: 0200000000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881c8922780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8881c8922800: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff8881c8922880: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff8881c8922900: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8881c8922980: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================