prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x0, &(0x7f0000000040))
r0 = syz_open_dev$vcsu(&(0x7f0000000140), 0x2ae9, 0x0)
read(r0, &(0x7f0000000180)=""/172, 0xac)