Alexei Starovoitov <alexei.starovoitov@xxxxxxxxx> writes:
> On Sun, Mar 24, 2024 at 11:54 AM Puranjay Mohan <puranjay12@xxxxxxxxx> wrote:
>>
>> +u64 bpf_arch_uaddress_limit(void)
>> +{
>> + return max(TASK_SIZE_MAX + PAGE_SIZE, VSYSCALL_ADDR);
>
> This is broken. See my other email.
> Sadly you didn't test it.
Yes, sorry for this. I was relying on the CI for the test this time as
thought it would work. I just realised this would reject all addresses!
Given that the current x86-64 JIT just tests for TASK_SIZE_MAX +
PAGE_SIZE can we go ahead with this and later fix it for VSYSCALL_ADDR
as it is specific for x86-64?
Also, I will spend some time figuring out the best way to do this, there
should be some mathematical trick somewhere.
