================================================================== BUG: KASAN: slab-out-of-bounds in hiddev_ioctl_usage.isra.0+0x12d0/0x13b0 drivers/hid/usbhid/hiddev.c:522 Read of size 4 at addr ffff8881a69cbe80 by task syz-executor.1/5566 CPU: 1 PID: 5566 Comm: syz-executor.1 Not tainted 5.6.0-rc1-syzkaller #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+0xef/0x16e lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xd3/0x314 mm/kasan/report.c:374 __kasan_report.cold+0x37/0x77 mm/kasan/report.c:506 kasan_report+0xe/0x20 mm/kasan/common.c:641 hiddev_ioctl_usage.isra.0+0x12d0/0x13b0 drivers/hid/usbhid/hiddev.c:522 hiddev_ioctl+0x7a1/0x1550 drivers/hid/usbhid/hiddev.c:794 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0x11a/0x180 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:770 do_syscall_64+0xb6/0x5a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c449 Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f74d278cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f74d278d6d4 RCX: 000000000045c449 RDX: 0000000020002680 RSI: 00000000c018480b RDI: 0000000000000008 RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000341 R14: 00000000004c56b9 R15: 000000000076bf2c The buggy address belongs to the page: page:ffffea00069a6000 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: ffff8881a69cbd80: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ffff8881a69cbe00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe >ffff8881a69cbe80: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ^ ffff8881a69cbf00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ffff8881a69cbf80: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ==================================================================