On 9/23/2020 3:08 PM, Dave Hansen wrote:
On 9/23/20 3:06 PM, Yu, Yu-cheng wrote:I think I'll add a check here for (r + 8) >= TASK_SIZE_MAX. It is better than getting a fault.There's also wrmsr_safe().
Yes, thanks. Since I am going to change this to: fpu__prepare_write(), then write to the XSAVES area.The kernel does not expect XRSTORS to fail ("Bad FPU state detected..." message). So maybe still check the address first.
